Patent ID: 8637979

Claim:
A semiconductor device comprising: a semiconductor chip; a cooling body; a stacked structure including: a first thermal conductor fixed to said cooling body, an insulator disposed on a surface of said first thermal conductor, and a second thermal conductor disposed on said insulator, a surface of said semiconductor chip being disposed on said second thermal conductor, wherein a portion of said first thermal conductor spaced from said surface of said first thermal conductor having said insulator disposed thereon is disposed on said cooling body; and an electrically insulating material covering said semiconductor chip and said stacked structure other than said portion of said first thermal conductor disposed on said cooling body, whereby said portion of said first thermal conductor disposed on said cooling body protrudes outwardly of said insulation material in plan view, and wherein a portion of said first thermal conductor located between said surface having said insulator disposed thereon and said portion disposed on said cooling body exhibits a recess being recessed inwardly into the first thermal conductor and opposite to the outward direction of extension of the portion of said first thermal conductor disposed on said cooling body.