Patent ID: 8319304
Filing Date: 2012-11-27
Classification: H01L

Abstract:
1. A light detecting apparatus comprising: an SOI substrate that has a semiconductor layer and a silicon substrate laminated via an insulating layer, said semiconductor layer having a light receiving unit and a circuit unit formed therein, said SOI substrate having a first main surface and a second main surface; an interlayer insulating film formed on top of the first main surface of the SOI substrate; a front surface circuit wiring connected to the light receiving unit or the circuit unit, the front surface circuit wiring being embedded in the interlayer insulating film; a front surface pseudo-wiring formed on the interlayer insulating film, the front surface pseudo-wiring having a grid unit that defines an opening allowing passage of a light of a predetermined wavelength range to the light receiving unit; a rear surface circuit wiring provided on top of the second main surface of the SOI substrate; a rear surface pseudo-wiring provided on top of the second main surface of the SOI substrate; a penetration circuit wiring that penetrates the SOI substrate to connect the front surface circuit wiring to the rear surface circuit wiring; and a penetration pseudo-wiring that penetrates at least the SOI substrate to electrically connect the front surface pseudo-wiring to the rear surface pseudo-wiring, wherein the light receiving unit is surrounded by the front surface pseudo-wiring, the rear surface pseudo-wiring, and the penetration pseudo-wiring.