| (11) | EP 1 531 492 A3 |
(12) | EUROPEAN PATENT APPLICATION |
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(54) | Semiconductor device and its manufacturing method capable of preventing short circuit of electrodes when semiconductor device is mounted on sub-mount substrate |
(57) A confronting surface of a substrate (1) faces a first surface of a semiconductor element (30). Extension layers (4,5) are formed on the substrate at positions facing electrodes (36,37) on the semiconductor element (30). A levee film (14) is disposed on one of the confronting surface and the first surface. Openings (15,16) are formed through the levee film (14). Connection members (38,39) which is filled but is not completely filled in the openings (15,16) connect the electrodes (36,37) and the extension layers (4,5).
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