Photo-generated carriers may diffuse into the adjacent cells to form the electrical crosstalk, which is especially no- ticeable after the pixel cell size has been scaled down. The electrical crosstalk strongly depends...Photo-generated carriers may diffuse into the adjacent cells to form the electrical crosstalk, which is especially no- ticeable after the pixel cell size has been scaled down. The electrical crosstalk strongly depends on the structure and electrical properties of the photosensitive areas. In this work, time-dependent crosstalk effects considering different isola- tion structures are investigated. According to the different depths of photo-diode （PD） and isolation structure, the transport of photo-generated carriers is analyzed with different regions in the pixel cell. The evaluation of crosstalk is influenced by exposure time. Crosstalk can be suppressed by reducing the exposure time. However, the sensitivity and dynamic range of the image sensor need to be considered as well.展开更多
基金Project supported by the National Key Research and Development Program of China(Grant No.NKRDP 2016YFA0202101)
文摘Photo-generated carriers may diffuse into the adjacent cells to form the electrical crosstalk, which is especially no- ticeable after the pixel cell size has been scaled down. The electrical crosstalk strongly depends on the structure and electrical properties of the photosensitive areas. In this work, time-dependent crosstalk effects considering different isola- tion structures are investigated. According to the different depths of photo-diode （PD） and isolation structure, the transport of photo-generated carriers is analyzed with different regions in the pixel cell. The evaluation of crosstalk is influenced by exposure time. Crosstalk can be suppressed by reducing the exposure time. However, the sensitivity and dynamic range of the image sensor need to be considered as well.
