Patent ID: 8089147

Claim:
A package for copacking at least two semiconductor dies which each have parallel first and second surfaces and respective solderable first and second electrodes on said first and second surfaces; said package comprising: a composite structure including a relatively thick electrically conductive metallic layer, a relatively thin electrically conductive patterned layer having at least first and second spaced segments, and a thin electrically insulating dielectric layer which bonds one surface of said patterned layer to one surface of said metallic layer, wherein peripheral edges of said composite structure include a rim which is downwardly bent in a direction perpendicular to a remaining flat central web thereof to define a flat cup shape; said first electrodes of said at least two semiconductor dies being electrically connected to said first and second spaced segments; said second electrodes of said at least two semiconductor dies being substantially coplanar; said first and second spaced segments extending to opposite edges of said composite structure to define first and second terminals of said package; said second electrodes defining at least third and fourth terminals for said package; said at least two semiconductor dies being closely thermally coupled to said metallic layer through said dielectric layer.