Patent ID: 6621161
Filing Date: 2003-09-16
Classification: H01L

Abstract:
A semiconductor device comprising:a first plate-like base substrate having a primary surface and a rear surface opposite to said primary surface, said first plate-like base substrate having a substantially rectangular extrapolated outer shape in a plane parallel to said primary surface, said first plate-like base substrate having a base electrode on said rear surface; a second base substrate connected to said primary surface of said first plate-like base substrate, said second base substrate having a substantially same extrapolated outer shape in a plane parallel to said primary surface of said first plate-like base substrate; said second base substrate having a penetrating hole perpendicular to said primary surface of said first plate-like base substitute; a plate-like cap member connected to said second base substrate to cover said penetrating hole in said second base substrate; and a semiconductor chip housed in a cavity surrounded by said first plate-like base substrate, said second base substrate and said plate-like cap member, said semiconductor chip being electrically connected to said base electrode; wherein said first plate-like base substrate and said second base substrate each includes at least one truncated corner.