The ornamental design for a pedestalbase of a heat insulating cylinder for manufacturing semiconductor wafers, as shown and described.
FIG. 1 is a perspective view of the design for a pedestal base of a heat insulating cylinder for manufacturing semiconductor wafers in accordance with the invention;
FIG. 2 is a front view thereof;
FIG. 3 is a rear view thereof;
FIG. 4 is a left side view thereof;
FIG. 5 is a right side view thereof;
FIG. 6 is a plan view thereof;
FIG. 7 is a bottom view thereof; and,
FIG. 8 is a sectional view along line 8—8 of FIG. 6.