Eschweiler & Potashnik, LLC
Image sensor with improved near-infrared (NIR) radiation phase-detection autofocus (PDAF) performance
Various embodiments of the present disclosure are directed towards an integrated chip (IC). The IC comprises a first phase detection autofocus (PDAF) photodetector and a second PDAF photodetector in a substrate. A first electromagnetic radiation (EMR) diffuser is disposed along a back-side of the substrate and within a perimeter of the first PDAF photodetector. The first EMR diffuser is spaced a first distance from a first side of the first PDAF photodetector and a second distance less than the first distance from a second side of the first PDAF photodetector. A second EMR diffuser is disposed along the back-side of the substrate and within a perimeter of the second PDAF photodetector. The second EMR diffuser is spaced a third distance from a first side of the second PDAF photodetector and a fourth distance less than the third distance from a second side of the second PDAF photodetector.
Taiwan Semiconductor Manufacturing Company, Ltd.
G G H G H H H H H G H H H G H H
G02B G01J H01L G01J H01L H01L H01L H01L H01L G01J H01L H01L H01L G02B H01L H01L
inventional inventional inventional additional inventional inventional inventional inventional additional inventional inventional inventional inventional inventional inventional inventional
Chun-Hao Wei-Chieh Keng-Yu Chih-Kung Cheng Yu Kazuaki Wen-Hau
Chuang Chiang Chou Chang Huang Hashimoto Wu