Patent ID: 7285858

Claim:
A semiconductor device comprising: a semiconductor element having first and second electrodes formed on a first surface; a sub-mount substrate disposed so that a confronting surface of the sub-mount substrate faces the first surface of the semiconductor element, the sub-mount substrate having first and second extension layers disposed at positions facing the first and second electrodes; a levee film made of insulating material and disposed on the confronting surface of the sub-mount substrate, the levee film having first and second openings formed therethrough at positions corresponding to the first and second electrodes; a first connection member for electrically connecting the first electrode and the first extension layer via the first opening and not completely burying an inside of the first opening; and a second connection member for electrically connecting the second electrode and the second extension layer via the second opening and not completely burying an inside of the second opening; wherein the first electrode comprises a bottom portion facing the sub-mount substrate, the first connection member comprises a top portion facing the semiconductor element, a surface of the top portion of the first connection member is broader than a surface of the bottom portion of the first electrode, and the levee film is in tight adhesion to a partial area of the surface of the top portion of the first connection member via a first adhesion layer made of material enhancing tight adhesion therebetween.