摘要:
The active pixel includes a photodiode, a reset transistor, and a pixel output transistor. The photodiode is substantially covered with a protective structure, thus protecting the entire surface of the photodiode from damage. This substantially eliminates potential leakage current sources, which result in dark current. The protective structure has a photodiode contact formed therein to electrically connect the photodiode to the pixel output transistor.
摘要:
The active pixel includes a photodiode, a reset transistor, and a pixel output transistor. The photodiode is substantially covered with a protective structure, thus protecting the entire surface of the photodiode from damage. This substantially eliminates potential leakage current sources, which result in dark current. The protective structure has a photodiode contact formed therein to electrically connect the photodiode to the pixel output transistor.
摘要:
A method for protecting an image sensor die is disclosed. The method comprises forming a plurality of image sensor die having micro-lenses onto a semiconductor wafer. Then, a protective layer is formed over the image sensor die. After the protective layer has been formed, and without any removal step of the protective layer, the wafer is diced to separate the plurality of image sensor die. Finally, the image sensor die are mounted onto an integrated circuit package and the protective layer is removed.
摘要:
A method for protecting an image sensor die is disclosed. The method comprises forming a plurality of image sensor die having micro-lenses onto a semiconductor wafer. Then, a protective layer is formed over the image sensor die. After the protective layer has been formed, and without any removal step of the protective layer, the wafer is diced to separate the plurality of image sensor die. Finally, the image sensor die are mounted onto an integrated circuit package and the protective layer is removed.
摘要:
The active pixel includes a photodiode, a transfer gate, and a reset transistor. The photodiode is substantially covered with an overlying structure, thus protecting the entire surface of the photodiode from damage. This substantially eliminates potential leakage current sources, which result in dark current. In one embodiment, the photodiode is covered by a FOX region in combination with the transfer gate.
摘要:
The active pixel includes a photodiode, a transfer gate, and a reset transistor. The photodiode is substantially covered with an overlying structure, thus protecting the entire surface of the photodiode from damage. This substantially eliminates potential leakage current sources, which result in dark current. In one embodiment, the photodiode is covered by a FOX region in combination with the transfer gate.
摘要:
A method for reducing dark current in a photodiode is disclosed. The photodiode comprises a N-well formed in a P-substrate. The method comprises doping the surface of said N-well with a nitrogen dopant. Alternatively, an oxygen or silicon dopant may be used. Still alternatively, a silicon oxynitride layer may be formed over the N-well.
摘要:
The active pixel includes a photodiode, a transfer gate, and a reset transistor. The photodiode is substantially covered with an overlying structure, thus protecting the entire surface of the photodiode from damage. This substantially eliminates potential leakage current sources, which result in dark current. In one embodiment, the photodiode is covered by a FOX region in combination with the transfer gate.
摘要:
A CMOS image sensor that has reduced transistor count is disclosed. The individual pixels are formed by a pinned photodiode and a transfer transistor. An output node receives the signal from the photodiode via the transfer transistor. The output node is shared between multiple pixels. Further, a reset transistor is coupled between a selectable low voltage rail Vss or a high voltage reference Vref and the output node. The gate of an output transistor is then coupled to the output node. Both the reset transistor and output transistors are shared between multiple pixels.
摘要:
Embodiments of the present invention are directed to a plurality of light sensor cells disposed in a substrate in a shared pixel arrangement. Common readout circuitry is used to simultaneously read out image information from a group of light sensor cells. The image information from the group of light sensor cells is added together simultaneously and coupled to auto-focus circuitry and/or preview circuitry to provide for better lens adjustments and preview display.