BACKSIDE-ILLUMINATED SENSOR WITH NOISE REDUCTION
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United States of America Patent
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Issued Date -
Nov 17, 2011
app pub date -
May 17, 2010
filing date -
May 17, 2010
priority date (Note) -
Abandoned
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Abstract
A backside-illuminated sensor includes a substrate, at least one lens and at least one pixel structure. The substrate has a front surface and a backside surface, and the lens is formed on the backside surface of the substrate and the pixel structure is formed on a pixel area included in the front surface of the substrate, where a projected area of the pixel area on the backside surface in a thickness direction of the substrate is covered by the lens. The pixel structure includes a first power node for receiving a first supply voltage, a second power node for receiving a second supply voltage different from the first supply voltage, a sensing element and a capacitor for noise reduction. The sensing element generates a sensing signal according to an incident luminance from the lens.
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