A multilayer printed wiring board is presented for surface mounting or through hole technology, which includes one or more layers of a high capacitance flexible dielectric sheet material. The dielectric sheet is comprised of a monolayer of multilayer or single layer high dielectric constant (e.g. ceramic) chips or pellets of relatively small area and thickness which are arranged in a planar array. These high dielectric constant chips are spaced apart by a small distance. The spaces between the chips are then filled with a flexible polymer/adhesive to define a cohesive sheet with the polymer binding the array of high dielectric (e.g. ceramic) chips together. Next, the opposite planar surfaces of the array (including the polymer) are electroless plated or electroded by vacuum metal deposition, or sputtering, to define opposed metallized surfaces. The board of the present invention alleviates the need for decoupling capacitors, thus resulting in significant, space savings on the board surface.
|
1. A multilayer circuit board comprising:
a first layer of insulating material having opposed first and second surfaces; a second layer of insulating material having opposed first and second surfaces; a first conductive layer on at least a portion of said first surface of said first layer of insulating material; a second conductive layer on at least a portion of said first surface of said second layer of insulating material; at least one high dielectric flexible sheet between and in contact with said second surfaces of said first and second layers of insulating material, said high dielectric flexible sheet including: (a) an array of spaced high dielectric chips arranged in a single layer, each of said chips having side, top and bottom surfaces; (b) a flexible polymeric binder between said side surfaces of said chips and binding said chips to define a cohesive sheet having opposed first and second planar surfaces with said top and bottom surfaces of said chips being exposed on said respective first and second surfaces, said binder being selected from the group consisting of flexible thermoplastics and flexibilized thermosets; (c) a first metallized layer defining a first voltage level plane on said first planar surface; and (d) a second metallized layer defining a second voltage level plane on said second planar surface.
3. The board of
said ceramic material is selected from the group consisting of bariun titanate, lead magnesium niobate or iron tungsten niobate.
4. The board of
said chips have a shape which is selected from the group consisting of cylindrical, rectangular or square.
5. The board of
at least one groove formed in said chips to enhance mechanical binding with said polymeric binder.
6. The board of
said chips comprise multilayer capacitive elements having exposed top and bottom electrodes which electrically contact respective of said first and second metallized layers.
7. The board of
said first and second metallized layers are comprised of a material selected from the group consisting of copper, nickel or tin.
8. The board of
said high dielectric chip has a dielectric constant of at least 10,000.
9. The board of
at least one first via connecting said first conductive layer to said first voltage level plane; and at least one second via connecting said second conductive layer to said second voltage level plane.
10. The board of
an opening through said high dielectric flexible sheet; and at least one of said first or second vias passing through said opening.
11. The board of
at least one plated through hole interconnecting said first and second conductive layers, said plated through hole being out of contact with said first and second voltage level planes.
12. The board of
a plurality of adjacent high dielectric flexible sheets between said first and second layers of insulating material.
13. The board of
said first and second conductive layers each comprise respective first and second conductive patterns.
|
This is a continuation-in-bart of U.S. application Ser. No. 226,019 filed Aug. 1, 1988 now U.S. Pat. No. 4,908,258.
This invention relates generally to a multilayer printed wiring board, either for surface mounting or through hole technology. More, particularly this invention relates to a multilayer printed wiring board which incorporates a high dielectric constant sheet material.
It wiil be apreciated that there is an ever increasing need for a reliable, flexible high dielectric material which may be used for a variety of applications in electronic circuitry design and manufacture. Presently, flexible high dielectric materials of this type are manufactured by mixing small particles (e.g. 1-3 microns) of a high dielectric constant material into a flexible polymeric matrix. Surprisingly, the resultant effective dielectric constant of the dielectric impregnated polymer is relatively low. For example, the dielectric constant of a Z5U BaTiO3 is in the range of 10,000 to 12,000. However, when such Barium Titanate is mixed with a flexible polymer such as polyimide, polyester, polyetherimide and like materials, the effective dielectric constant relizable is only on the order of 20 to 40 (depending on the loading ratio of the dielectric in the polymer).
It will be further appreciated that a need exists for a multilayer printed circuit board which provides power distribution free of the need for decoupling capacitors. This is because decoupling capacitors take up space on the surface of the surface of the board. This space can be used for integrated circuit chips or other functional components thereby increasing the amount of functional area on the board. Attempts have been made to construct a board which provides both power distribution and decoupling. One prior art attempt involves reducing the thickness of the dielectric layer between the voltage and ground planes. This attempt has proven unsatisfactory because of manufacturing problems. Because of the reduced thickness of the dielectric layer, pin holes are formed in it thereby resulting in electrical shorting of the circuit board. Also, the capacitance of the board varies with changes in the thickness of the dielectric layer. Another prior art board uses as a dielectric a suitable polymer filled with a high dielectric constant material such as barium titantate. The filed polymer is placed between the voltage and ground planes to create a capacitor effect. This prior art multilayer board has proven ineffective because the filled polymer has an effective dielectric constant of no more than about 80-100, which is too low for adequate results.
The above-discussed and other problems and deficiencies of the prior art are overcome or alleviated by the multilayer circuit board of the present invention which incorporates a high dielectric constant flexible sheet material. In accordance with the present invention, this high capacitance flexible dielectric material is comprised of a monolayer of multilayer or single layer high dielectric constant (e.g. ceramic) chips or pellets of relatively small area and thickness which are arranged in a planar array. These high dielectric constant chips are spaced apart by a small distance. The spaces between the chips are then filled with a flexible polymer/adhesive to define a cohesive sheet with the polymer binding the array of high dielectric constant (e.g. ceramic) chips together. Next, the opposite planar surfaces of the array (including the polymer) are metallized (e.g. electroless plated or metallized by vacuum deposition, sputtering, etc.) to define opposed metailized surfaces. The end result is a relatively flexible high capacitance dielectric film or sheet material which is drillable, platable, printable, etchable, laminable and reliable.
In a preferred embodiment, the small high dielectric chips are cylindrical in shape. However, the chips may be any other suitable shape including rectangular. Also, the high dielectric constant chips may includes punches or cut-outs to improve mechanical adhesion between the chips and the polymeric binding material.
Also as mentioned above, rather than using high dielectric constant (ceramic) pellets, the discrete high dielectric monolayer may be comprised of an array of multilayer ceramic chips such as those disclosed at FIGS. 4 and 10 in U.S. Pat. No. 4,748,537 and at FIGS. 11-16 and U.S. Pat. No. 4,706,162, all of which are assigned to the assignee hereof and incorporated herein by reference.
The high capacitance flexible dielectric sheet of the present invention may be used in a large number of applications in the electronic circuitry design and manufacturing fields. For example, the high dielectric flexible sheet may be used for forming multilayer circuit boards, or in the manufacture of decoupling capacitors or bus bars.
The multilayer printed circuit board of the present invention provides a circuit board which both decouples and distributes power. The multilayer printed circuit board of the present invention may be comprised of multiple layers of insulative material with the central layer being comprised of the high dielectric constant flexible sheet. The metallized surfaces of the high dielectric constant sheet act as the voltage and ground planes of the circuit board. On the surface of the board is provided a printed metallic pattern which defines the circuit. Because this board can be used free of decoupling capacitors, it provides the user with a higher packing density of functional components on the surface of the board.
The above discussed and other features and advantages of the present invention will be appreciated and understood by those of ordinary skill in the art from the following detafied description and drawing.
Referring now to the drawings, wherein like elements are numbered alike in the several FIGURES:
FIG. 1 is a perspective view of the high dielectric flexible sheet material of the present invention;
FIG. 2 is a cross-sectional elevation view along the line 2--2 of FIG. 1;
FIG. 3 is a perspective view, similar to FIG. 1 of a different embodiment of the present invention;
FIG. 4 is a cross-sectional elevation view along the line 4-4 of FIG. 3;
FIGS. 5A. 5B and 5C are perspective views of alternative high dielectric constant pellet configurations which may be used in accordance with the present invention;
FIG. 6 is a cross-sectional elevation view of still another embodiment of the present invention utilizing multilayer capacitive elements;
FIG. 7 is a cross-sectional elevation view similar to FIG. 6, subsequent to metallization; and
FIG. 8 is a cross-sectional elevation view similar to FIG. 7, and subsequent to additional metallization.
FIG. 9 is a cross-sectional plated side elevation view of the multi layer pnnted circuit board of the present invention;
FIG. 10 is a prospective view with sections cut away of the board of FIG. 9;
FIG. 11 is a cross-sectional partial side elevation view of the circuit board of FIG. 9 with plated through holes;
FIG. 12 is a cross-sectional of the circuit board of FIG. 9 with a surface mounted IC; and
FIG. 13 is a cross-sectional elevation view of the circuit board of FIG. 9 incorporating a pair of internal high dielectric constant flexible sheets.
This invention relates to a multilayer circuit board incorporating a high dielectric constant sheet material. Referring first to FIGS. 1 and 2, the high dielectric constant flexible polymeric sheet material is shown generally at 10. Flexible sheet 10 is comprised of a monolayer of high dielectric constant pellets or chips 12 which are of relatively small area and thickness and are arranged in a planar array. The chips are separated from each other by a small distance to define spaces therebetween. The spaces between the chips 12 are filled with a suitable polymeric material 14. Polymeric material 14 will act as a binder to hold the array of high dielectric constant pellets 12 together. Significantly, polymeric material 14, will contact only the sides of pellets 12 and will be out of contact with the top and bottom surfaces 16 and 18 of each pellet 12. This will result in both end surfaces 16, 18 of high dielectric constant pellets 12 and end surfaces 20, 22 of polymeric binder 14 being exposed. Next, these opposed and exposed surfaces (comprised of surfaces 16 and 20 on the one hand and surfaces 18 and 22 on the other hand) of the pellet array and polymer are metalized to define a thin (e.g. about 10-50 micro inches) metallized layer 24 and 26. These thin metallized layers 24 and 26 may then be plated up to higher thicknesses (e.g. about 1-2 mils) by well known electroplating techniques to define layers 28 and 30. The thin metallized layers may be produced using any known method including by electroless plating or by vapor deposition techniques including vacuum deposition, sputtering, etc.
The material used to produce high dielectric constant pellets 12 may be any suitable high dielectric constant material and is preferably a high dielectric constant ceramic material such as BaTiO3. In addition, other known high dielectric ceramic materials may be utilized including lead magnesium niobate, iron tungsten niobate, etc. It will be appreciated that by "high" dielectric constant, it is meant dielectric constants of over about 10,000. As mentioned, the pellets are relatively small and are preferably cylindrical in shape having a height of 0.015" and a diameter of 0.020". If a ceramic is used, the pellets should be fully sintered prior to being bonded together by the polymer.
Of course, while cylindrical configurations for the array of pellets 12 are preferred, any other suitably shaped high dielectric constant pellet may be used. For example, in FIG. 3, a flexible high capacitance sheet is shown at 32 incorporating an array of rectangularly shaped pellets 34 in a polymer matrix 36. Also, in FIGS. 5A-5C, square shaped pellets are shown at 38,39 and 40 respectively which are provided with from two through eight slots or grooves 42. It will be appreciated that these grooves or slots will provide a stronger mechanical bond between the polymeric binder and the pellet.
The pellet array is impregnated with a suitable polymer which may be a either a flexible thermoplastic or a flexibilized thermoset (epoxy, polyetherimide, polyester, etc.) to give the array mechanical strength and electrical insulating stability with temperature, moisture, solvents, etc. The polymeric material should be a high temperature (approximately 350° F.) polymer which is somewhat flexible and has a dielectric constant of between about 4-9. Preferred materials include polyetherimides, polyimides, polyesters and epoxies. It will be appreciated that the flexibility is necessary to preclude cracking of the sheet under stress.
Preferably, the dielectric sheet is electroless plated with copper or nickel.
The resultant sheet material will have an effective high dielectric constant of better than 1,000, a small thickness (approximately 0.005"-0.015"), will be flexible, will be metallized on both sides and will be drillable and platable.
A mathematical analysis can be made to determine the effective dielectric constant of the combined pellet array and polymeric matrix.
For example, using a dietecmc sheet as depicted in FIGS. 1 and 2 which incorporates cylindrical pellets measuring 0.020" in diameter by 0.010" in length; and assuming a sheet of one square inch having a total of about 2,500 cylinders. Capacitance of the dielectric sheet is determined using the following formula:
C=ε×(εo)×(α/D)×(N) (1)
where
C=total capacitance
ε=relative permitivity of the dielectric
εo =permitivity of free space
a=area of electroded part of dielectric
D=distance between two electrodes of dielectric
N=number of dielectric pellets
Assuming that the pellets are made of a Z5U dielectric with a dielectric constant of 15,000, then the capacitance of such an array would be:
ε=15,000
εo =8.85×10-12
a=2.827×10 -7 m2
D=3×10-4 m
N=2500
Thus: ##EQU1## or
C=312 nF/sq.-in, or 312,500 pF/sq in.
If an X7R dielectric with a dielectric constant of 4500) is utilized, then using the above equation (1), the capacitance per square inch would be about 93.6 nF/sq.in.
If a rectangular ceramic pellet (such as shown in FIG. 3) made from lead magnesium niobate (having a dielectric constant of 17,000) is selected with each pellet having surface area dimensions of 0.2041×0.30" and 0.015" in thickness; and with the array of pellets being spaced apart 0.020", then, using the same calculations as in Example 1, the capacitance will be 224 nF/sq in. Alternately, if an internal boundary layer dielectric is selected with a dielectric constant of approximately 60,000 [such as (Sr0.4 Ba0.6) TiO3 +10H2 O] then the effective capacitance per square inch will be equal to 759 n F./sq.in.
Still another embodiment of the present invention is shown in FIGS. 6-8. In this embodiment, rather than using high dielectric constant pellets of homogeneous composition, a multilayer capacitive element 44 is utilized. Capacitive element 44 is a known multilayer ceramic chip capacitor (such as disclosed in aforementioned U.S. Pat. Nos. 4,745,537 and 4,706,162) comprised of a plurality of metallized layers 46 with alternating layers being connected to end electrodes 48 and 50. The top and bottom surfaces of multilayer chip 44 includes exposed electrodes 52 and 54 which are also connected to opposed end electrodes 48 and 50, respectiveiy. Finally, an insulating cap 56 is provided on each end electrode 48 and 50 to prevent shorting between an exposed top or bottom electrode 52, 54 and one of the end electrodes 48 and 50. As in the previously discussed embodiments of FIGS. 1-4, in this latter embodiment, a plurality of multilayer capacitive elements 44 are arranged in a monolayer array and a suitable polymeric adhesive 58 is used to bind the side edges of the multilayer chips 44 together. As shown in FIG. 6, this will typically result in an undulating surface between the polymer 58 and each multilayer capacitive element 44. As shown in FIG. 7, the array can then be electroless plated with copper, nickel, tin or any other suitable plating material to define thin metallized outer layers 60 and 62. Of course the undulating surface features may be eliminated by sufficiently building up the thickness of the plated electrodes and then grinding or lapping them to define a planar outer surface as in FIG. 8.
It will be appreciated that the capacitance per unit area for the FIGS. 6-8 embodiment of the present invention will depend upon the size of the chips, the number of the chips per unit area, the capacitance of individual chips and the thickness of the chips.
As an illustration of the levels of capacitance achievable with the embodiment of FIGS. 6-8, a flexible sheet of the type shown in FIG. 8 using multilayer capacitive elements 44 having length dimensions of 0.35", width dimensions of 0.20" anti thickness dimensions of 0.018" will be discussed. The dielectric used in the capacitive element is a lead magnesium niobate dielectric wherein capacitance on an average of 1.0 micro F/chip is obtainable. Next, assuming a 0.030" gap between chips in the chip array, there would be 4.4 chips in the y direction and 3.03 chips in the x direction for a total of 13.33 chips per square inch or a total capacitance of 13.33 micro F./sq.in. This is compared to the far lower capacitance obtained from using the embodiment of FIG. 1 (see Example 1) of 0.312 micro F./sq. in.
Refernng now to FIGS. 9-12, a high capacitance multilayer printed circuit board in accordance with the present invention is shown generally at 90. Circuit board 90 comprises a pair of exterior electrically insulative layers 92 and 94 which sandwich therebetween a high dielectric flexible layer 96 of the type described in detail with regard to FIGS. 1-8. Each insulative sheet 92 and 94 include circuit patterns 98 and 100 respectively thereon. As described in detail above, flexible dielectric sheet 96 comprises a planar layer of spaced ceramic chips 102 separated by a flexible polymeric material 104. Dielectric chips 102 and polymeric material 104 include a planar or otherwise deposited upper electrode 106 and lower electrode 108. Electrode layers 106 and 108 will act as the voltage and ground planes for the multilayer circuit board 90. Thus, high dielectric flexible layer 96 will function as a decoupling capacitor when a circuit component is electrically attached to board 90. This important feature of the present invention eliminates the need for discrete decoupling capacitor elements and frees valuable board space on the surface of board 90. Insulative layers 92 and 94, may comprise any suitable insulative material including well known circuit board materials FR-4, G-10, G-11 and the like.
High dielectric flexible sheet 96 may be altered to fine tune physical parameters on board 90 for particular uses. Also, multiple layers of sheet may be used to provide many voltage planes and interconnections. The thickness of layers 96 may be altered to vary the capacitance of board 90. Because of the design of flexible sheet 96, the capacitance per unit area of the dielectric layer may be varied to a predetermined level. The thickness of electrodes 106 and 108 may also be varied to change the current carrying capacity of the voltage planes and the ground planes. The temperature stability of sheet 96 may also be adjusted.
In addition to simultaneously providing both power distribution and decoupling, and eliminating the need for discrete alecoupling capacitors, the multilayer circuit board of the present invention provides many other advantages. Board 90 eliminates the need for expensive pick and place machinery for decoupling capacitors. It also eliminates solder quality problems inherent with decoupling capacitors. Moreover, flexible high dielectric sheet 96 makes multilayer board 90 more dense, more reliable, less costly to assemble, and also improves heat dissipation by virtue of ceramic elements 102 in the flexible dielectric layers.
The multilayer circuit board incorporanng the flexible high dielectric constant sheet in accordance with the present invention may be used with either through hole technology or in surface mount applications. For example, in FIG. 11, a dual-in-line integrated circuit package 110 includes a plurality of leads 112 which are mounted in plated through holes 114 in multilayer circuit board 90A. Circuit board 90A is substantially similar to circuit board 90 of FIGS. 9 and 10 with the exception that plated through holes 114 are provided to interconnect circuit patterns 98 and 100 on the two outer surfaces of the board.
In FIG. 12, a surface mount integrated circuit package 116 is shown on a multilayer circuit board 90B wherein vias 118 and 120 have been provided to interconnect with the flexible dielectric sheet 96 withn circuit board 90B. Note that a hole 122 has been drilled through flexible sheet 96 to permit attachment between the lower electrode 108 and via 120.
Turning now to FIG. 13, as mentioned, a plurality of flexible dielectric sheets 96 may be used in the multilayer circuit board of the present invention. Thus, in FIG. 13, a pair of flexible dielectric sheets 124 and 126 are mounted adjacent one another to provide a pair of outer voltage planes 128 and 130 and an inner ground plane 132. As in the embodiment of FIG. 12, holes are drilled in the flexible high dielectric sheets to provide attachment with the several voltage planes 128, 130 and ground plane 132. Of course, any number of flexible dielectric sheets may be stacked up within the circuit board so as to obtain relatively high preselected capacitance values.
While preferred embodiments have been shown and described, various modifications and substitutions may be made thereto without departing from the spirit and scope of the invention. Accordingly, it is to be understood that the present invention has been described by way of illustrations and not limitation.
Patent | Priority | Assignee | Title |
5745333, | Nov 21 1994 | International Business Machines Corporation | Laminar stackable circuit board structure with capacitor |
5841686, | Nov 22 1996 | Super Talent Electronics, Inc | Dual-bank memory module with shared capacitors and R-C elements integrated into the module substrate |
5886597, | Mar 28 1997 | Virginia Tech Intellectual Properties, Inc | Circuit structure including RF/wideband resonant vias |
5922991, | Mar 29 1996 | Robert Bosch GmbH | Arrangement for mounting a wiring harness on a support plate |
5973929, | Apr 21 1994 | Canon Kabushiki Kaisha | Printed circuit board having an embedded capacitor |
6016005, | Feb 09 1998 | Multilayer, high density micro circuit module and method of manufacturing same | |
6098282, | Nov 21 1994 | Advanced Semiconductor Engineering, Inc | Laminar stackable circuit board structure with capacitor |
6137671, | Jan 29 1998 | Energenius, Inc. | Embedded energy storage device |
6147870, | Jan 05 1996 | Honeywell International Inc. | Printed circuit assembly having locally enhanced wiring density |
6214445, | Dec 25 1998 | NGK Spark Plug Co., Ltd. | Printed wiring board, core substrate, and method for fabricating the core substrate |
6242286, | Feb 09 1998 | Multilayer high density micro circuit module and method of manufacturing same | |
6246014, | Jan 05 1996 | Honeywell International Inc. | Printed circuit assembly and method of manufacture therefor |
6509807, | Apr 07 1998 | X2Y Attenuators, LLC | Energy conditioning circuit assembly |
6606011, | Apr 07 1998 | X2Y Attenuators, LLC | Energy conditioning circuit assembly |
6608760, | May 04 1998 | TPL, Inc. | Dielectric material including particulate filler |
6616794, | May 04 1998 | TPL, INC | Integral capacitance for printed circuit board using dielectric nanopowders |
6621012, | Feb 01 2001 | Toshiba Global Commerce Solutions Holdings Corporation | Insertion of electrical component within a via of a printed circuit board |
6650525, | Apr 08 1997 | X2Y Attenuators, LLC | Component carrier |
6873513, | Apr 08 1997 | X2Y Attenuators, LLC | Paired multi-layered dielectric independent passive component architecture resulting in differential and common mode filtering with surge protection in one integrated package |
6894884, | Apr 08 1997 | Z2Y ATTENUATORS, LLC; X2Y Attenuators, LLC | Offset pathway arrangements for energy conditioning |
6936502, | May 14 2003 | RPX CLEARINGHOUSE LLC | Package modification for channel-routed circuit boards |
6954346, | Apr 08 1997 | X2YA ATTENUATORS LLC; X2Y Attenuators, LLC | Filter assembly |
6995983, | Apr 08 1997 | X2Y Attenuators, LLC; X2Y ATTENUATORS, L L C | Component carrier |
7006359, | Jul 14 2003 | AVX Corporation | Modular electronic assembly and method of making |
7042303, | Apr 07 1998 | X2Y Attenuators, LLC | Energy conditioning circuit assembly |
7042703, | Mar 22 2000 | X2Y ATTENTUATORS LLC | Energy conditioning structure |
7050284, | Apr 08 1997 | X2Y Attenuators, LLC | Component carrier |
7106570, | Apr 08 1997 | X2Y Attenuators, LLC | Pathway arrangement |
7110227, | Apr 08 1997 | X2Y Attenuators, LLC | Universial energy conditioning interposer with circuit architecture |
7110235, | Apr 08 1997 | X2Y Attenuators, LLC | Arrangement for energy conditioning |
7113383, | Apr 28 2000 | X2Y Attenuators, LLC | PREDETERMINED SYMMETRICALLY BALANCED AMALGAM WITH COMPLEMENTARY PAIRED PORTIONS COMPRISING SHIELDING ELECTRODES AND SHIELDED ELECTRODES AND OTHER PREDETERMINED ELEMENT PORTIONS FOR SYMMETRICALLY BALANCED AND COMPLEMENTARY ENERGY PORTION CONDITIONING |
7141899, | Apr 07 1998 | X2Y Attenuators, LLC | Component carrier |
7180718, | Jan 31 2003 | X2Y Attenuators, LLC | Shielded energy conditioner |
7193831, | Oct 17 2000 | X2Y Attenuators, LLC | Energy pathway arrangement |
7224564, | Oct 17 2000 | X2Y Attenuators, LLC | Amalgam of shielding and shielded energy pathways and other elements for single or multiple circuitries with common reference node |
7262949, | Aug 15 2000 | X2Y Attenuators, LLC | Electrode arrangement for circuit energy conditioning |
7265995, | Dec 29 2003 | Intel Corporation | Array capacitors with voids to enable a full-grid socket |
7274549, | Dec 15 2000 | X2Y Attenuators, LLC | Energy pathway arrangements for energy conditioning |
7301748, | Apr 08 1997 | X2Y Attenuators, LLC | Universal energy conditioning interposer with circuit architecture |
7321485, | Apr 08 1997 | X2Y Attenuators, LLC | Arrangement for energy conditioning |
7336467, | Oct 17 2000 | X2Y Attenuators, LLC | Energy pathway arrangement |
7336468, | Apr 08 1997 | X2Y Attenuators, LLC | Arrangement for energy conditioning |
7423860, | Apr 08 1997 | X2Y ATTENTUATORS, LLC; X2Y Attenuators, LLC | Multi-functional energy conditioner |
7427816, | Apr 07 1998 | X2Y Attenuators, LLC | Component carrier |
7428134, | Oct 17 2000 | X2Y Attenuators, LLC | Energy pathway arrangements for energy conditioning |
7433168, | Oct 17 2000 | X2Y Attenuators, LLC | Amalgam of shielding and shielded energy pathways and other elements for single or multiple circuitries with common reference node |
7440252, | May 29 2003 | X2Y Attenuators, LLC | Connector related structures including an energy conditioner |
7442083, | Jul 20 2007 | Lotes Co., Ltd.; LOTES CO , LTD | Electrical connector |
7443647, | Jan 16 1999 | X2Y Attenuators, LLC | Paired multi-layered dielectric independent passive component architecture resulting in differential and common mode filtering with surge protection in one integrated package |
7463492, | Dec 29 2003 | Intel Corporation | Array capacitors with voids to enable a full-grid socket |
7570493, | Nov 16 2006 | Sony Ericsson Mobile Communications; Sony Ericsson Mobile Communications AB | Printed circuit board with embedded circuit component |
7586728, | Mar 14 2005 | X2Y Attenuators, LLC | Conditioner with coplanar conductors |
7593208, | Apr 08 1997 | X2Y Attenuators, LLC | Multi-functional energy conditioner |
7609500, | Apr 08 1997 | X2Y Attenuators, LLC | Universal energy conditioning interposer with circuit architecture |
7609501, | Apr 08 1997 | X2Y Attenuators, LLC | Manufacture including shield structure |
7630188, | Mar 01 2005 | X2Y Attenuators, LLC | Conditioner with coplanar conductors |
7675729, | Dec 22 2003 | X2Y Attenuators, LLC; X2Y ATTENUATORS LLC | Internally shielded energy conditioner |
7688565, | Apr 08 1997 | X2Y Attenuators, LLC | Arrangements for energy conditioning |
7733621, | Apr 08 1997 | X2Y Attenuators, LLC | Energy conditioning circuit arrangement for integrated circuit |
7768763, | Apr 08 1997 | X2Y Attenuators, LLC | Arrangement for energy conditioning |
7782587, | Mar 01 2005 | X2Y Attenuators, LLC | Internally overlapped conditioners |
7817397, | Mar 01 2005 | X2Y Attenuators, LLC | Energy conditioner with tied through electrodes |
7916444, | Apr 08 1997 | X2Y Attenuators, LLC | Arrangement for energy conditioning |
7920367, | Apr 08 1997 | X2Y Attenuators, LLC | Method for making arrangement for energy conditioning |
7974062, | Mar 01 2005 | X2Y Attenuators, LLC | Internally overlapped conditioners |
8004812, | Apr 08 1997 | X2Y Attenuators, LLC | Energy conditioning circuit arrangement for integrated circuit |
8014119, | Mar 01 2005 | X2Y Attenuators, LLC | Energy conditioner with tied through electrodes |
8018706, | Apr 08 1997 | X2Y Attenuators, LLC | Arrangement for energy conditioning |
8023241, | Apr 08 1997 | X2Y Attenuators, LLC | Arrangement for energy conditioning |
8026777, | Mar 07 2006 | X2Y Attenuators, LLC | Energy conditioner structures |
8125766, | Jun 13 2008 | Kemet Electronics Corporation | Concentrated capacitor assembly |
8547677, | Mar 01 2005 | X2Y Attenuators, LLC | Method for making internally overlapped conditioners |
8587915, | Apr 08 1997 | X2Y Attenuators, LLC | Arrangement for energy conditioning |
8760848, | Jun 13 2008 | Kemet Electronics Corporation | Concentrated capacitor assembly |
9001486, | Mar 01 2005 | X2Y Attenuators, LLC | Internally overlapped conditioners |
9019679, | Apr 08 1997 | X2Y Attenuators, LLC | Arrangement for energy conditioning |
9036319, | Apr 08 1997 | X2Y Attenuators, LLC | Arrangement for energy conditioning |
9054094, | Apr 08 1997 | X2Y Attenuators, LLC | Energy conditioning circuit arrangement for integrated circuit |
9373592, | Apr 08 1997 | X2Y Attenuators, LLC | Arrangement for energy conditioning |
Patent | Priority | Assignee | Title |
2662957, | |||
3034930, | |||
3142047, | |||
3348990, | |||
3436819, | |||
3469019, | |||
3506482, | |||
3629730, | |||
3673092, | |||
3742597, | |||
3932932, | Sep 16 1974 | ITT Corporation | Method of making multilayer printed circuit board |
4187339, | Aug 31 1977 | Printed circuits | |
4211603, | May 01 1978 | Merix Corporation | Multilayer circuit board construction and method |
4301192, | Jun 02 1980 | AT & T TECHNOLOGIES, INC , | Method for coating thru holes in a printed circuit substrate |
4349862, | Aug 11 1980 | International Business Machines Corporation | Capacitive chip carrier and multilayer ceramic capacitors |
4372046, | Aug 24 1977 | KABUSHIKI KAISHA DAINI SEIKOSHA, | Method of making a switching electrode portion of a PCB |
4387137, | Dec 01 1980 | The Mica Corporation | Capacitor material |
4388136, | Sep 26 1980 | Sperry Corporation | Method of making a polyimide/glass hybrid printed circuit board |
4389278, | Jul 25 1981 | Method for manufacturing circuit board with through hole | |
4417393, | Apr 01 1981 | AMETEK AEROSPACE PRODUCTS, INC | Method of fabricating high density electronic circuits having very narrow conductors |
4486738, | Feb 16 1982 | Coors Electronic Package Company | High reliability electrical components |
4490429, | Jul 24 1981 | Hitachi, Ltd. | Process for manufacturing a multilayer circuit board |
4522888, | Dec 29 1980 | INSULATING MATERIALS INCORPORATED, ONE CAMPBELL RD , SCHENECTADY, NY 12306 A CORP OF NY | Electrical conductors arranged in multiple layers |
4543715, | Feb 28 1983 | Allied Corporation | Method of forming vertical traces on printed circuit board |
4554229, | Apr 06 1984 | AT&T Technologies, Inc. | Multilayer hybrid integrated circuit |
4554732, | Feb 16 1982 | COORS PROCELAIN COMPANY COORS , A CO CORP | High reliability electrical components |
4558020, | Jul 08 1981 | Matsushita Electric Industrial Co., Ltd. | Ceramic high dielectric composition |
4567542, | Apr 23 1984 | NEC Corporation | Multilayer ceramic substrate with interlayered capacitor |
4584627, | Jan 09 1985 | Circuit Components, Incorporated | Flat decoupling capacitor and method of manufacture thereof |
4586972, | Apr 05 1983 | Matsushita Electric Industrial Co., Ltd. | Method for making multilayer ceramic body |
4590537, | Sep 11 1983 | Murata Manufacturing Co., Ltd. | Laminated capacitor of feed-through type |
4605915, | Jul 09 1984 | Cubic Corporation | Stripline circuits isolated by adjacent decoupling strip portions |
4616292, | Jul 24 1984 | Hitachi, Ltd. | Multilayer printed circuit board |
4633035, | Jul 12 1982 | Rogers Corporation | Microwave circuit boards |
4635358, | Jan 03 1985 | E. I. du Pont de Nemours and Company | Method for forming electrically conductive paths through a dielectric layer |
4636018, | Jun 05 1985 | AMP Incorporated | Elastomeric electrical connector |
4636908, | Jan 31 1983 | Nippon Soda Co., Ltd. | Thin-film dielectric and process for its production |
4641425, | Dec 08 1983 | Interconnexions Ceramiques SA | Method of making alumina interconnection substrate for an electronic component |
4642569, | Dec 16 1983 | General Electric Company | Shield for decoupling RF and gradient coils in an NMR apparatus |
4675717, | Oct 09 1984 | American Telephone and Telegraph Company, AT&T Bell Laboratories | Water-scale-integrated assembly |
4739257, | Jun 06 1985 | Automated Electronic Technology, Inc. | Testsite system |
4775573, | Apr 03 1987 | POLY CIRCUITS, INC | Multilayer PC board using polymer thick films |
4882455, | Mar 27 1985 | Ibiden Co., Ltd. | Electronic circuit substrates |
4882651, | Dec 05 1988 | MRA LABORATORIES, INC , NORTH ADAMS, MA A CORP OF DE | Monolithic compound-ceramic capacitor |
4908258, | Aug 01 1988 | Circuit Components, Incorporated | High dielectric constant flexible sheet material |
4987108, | Mar 11 1987 | Murata Manufacturing Co., Ltd. | Dielectric paste |
5079069, | Aug 23 1989 | HADCO SANTA CLARA, INC | Capacitor laminate for use in capacitive printed circuit boards and methods of manufacture |
5162977, | Aug 27 1991 | Hadco Corporation | Printed circuit board having an integrated decoupling capacitive element |
5172304, | Nov 22 1990 | Murata Manufacturing Co., Ltd. | Capacitor-containing wiring board and method of manufacturing the same |
CH297158, | |||
JP6352446, | |||
JP8078411, |
Executed on | Assignor | Assignee | Conveyance | Frame | Reel | Doc |
May 12 1993 | Circuit Components, Incorporated | (assignment on the face of the patent) | / |
Date | Maintenance Fee Events |
Oct 10 1995 | ASPN: Payor Number Assigned. |
Oct 10 1995 | R160: Refund Processed. Maintenance Fee Has Already Been Paid. |
Date | Maintenance Schedule |
Oct 17 1998 | 4 years fee payment window open |
Apr 17 1999 | 6 months grace period start (w surcharge) |
Oct 17 1999 | patent expiry (for year 4) |
Oct 17 2001 | 2 years to revive unintentionally abandoned end. (for year 4) |
Oct 17 2002 | 8 years fee payment window open |
Apr 17 2003 | 6 months grace period start (w surcharge) |
Oct 17 2003 | patent expiry (for year 8) |
Oct 17 2005 | 2 years to revive unintentionally abandoned end. (for year 8) |
Oct 17 2006 | 12 years fee payment window open |
Apr 17 2007 | 6 months grace period start (w surcharge) |
Oct 17 2007 | patent expiry (for year 12) |
Oct 17 2009 | 2 years to revive unintentionally abandoned end. (for year 12) |