Patent ID: 9508774
Filing Date: 2016-11-29
CPC Classification: H01L

Claim Text:
1. A semiconductor device, comprising: a semiconductor substrate having a main surface; an element region where photodetectors are formed in the semiconductor substrate; and a non-element region formed outside the element region over the main surface, the non-element region including: a top-layer metal wiring in a top layer of metal wirings formed in the non-element region; a flattening film covering an upper surface of the top-layer metal wiring; and a protecting film formed over the flattening film; a removed part formed by removing the protecting film in at least part of the non-element region; and a first slot formed by removing only a portion of the flattening film exposed by the removed part, the first slot reaching at least a depth of the upper surface of the top-layer metal wiring from the upper surface of the flattening film.