The ornamental design for a semiconductordevice, as shown and described.
FIG. 1 is a front, top, and right side perspective view of a semiconductor device showing our new design;
FIG. 2 is a rear, bottom and left side perspective view thereof;
FIG. 3 is a front view thereof, the rear view being a mirror image of FIG. 3;
FIG. 4 is a top plan view thereof;
FIG. 5 is a bottom plan view thereof;
FIG. 6 is a right side view thereof; and,
FIG. 7 is a left side view thereof.
The broken lines illustrate portions of the semiconductor device that form no part of the claimed design. The dash-dotted lines denote the boundary of the claim and form no part of the claimed design.