Patent ID: 9685475
Date: 2017-06-20
CPC Classifications: H01L

Claim:
1. A back-illuminated integrated imaging device, comprising: a semiconductor substrate including a back side and a front side; a zone of pixels, configured to be illuminated from the back side of the semiconductor substrate, bounded by capacitive deep trench isolations formed in trenches located in the semiconductor substrate and extending into the back side of the semiconductor substrate; a peripheral zone located outside said zone of pixels; contact pads at the back side of the semiconductor substrate including a biasing contact pad; and a continuous electrically conductive layer configured to form, in said zone of pixels, an electrode in each capacitive deep trench isolation, and to form, in said peripheral zone, a redistribution layer at the back side of the semiconductor substrate electrically coupled to the electrode in each capacitive deep trench isolation and electrically coupled to said biasing contact pad for applying a voltage for biasing said electrode in each capacitive deep trench isolation; wherein said electrode in each capacitive deep trench isolation is located between a trench dielectric and at least one material for filling said trenches.