Patent ID: 9659981
Date: 2017-05-23
CPC Classifications: H01L

Claim:
1. A semiconductor image sensor device, comprising: a semiconductor substrate having a p-type region that includes a p-type dopant, wherein a back surface of the semiconductor substrate is configured to receive incident radiation; a plurality of radiation-sensing regions in the p-type region proximate a front surface of the semiconductor substrate opposing the back surface of the semiconductor substrate; and a first negatively-charged layer adjoining the p-type region proximate the plurality of radiation-sensing regions, wherein the first negatively-charged layer is on an entirety of the front surface of the semiconductor substrate and wherein the front surface of the semiconductor substrate is between the first negatively-charged layer and the back surface of the semiconductor substrate; and wherein the first negatively-charged layer has a total negative charge greater than about 1E10/cm2.