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US 2016/0254304 A1Published application
Image sensor with embedded infrared filter layer
AssigneeTaiwan Semiconductor Manufacturing Company, Ltd.
InventorsKeng-Yu CHOU, Kazuaki HASHIMOTO, Jen-Cheng LIU, Jhy-Jyi SZE, Wei-Chieh CHIANG, Pao-Tung CHEN
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Abstract
An image sensor includes a substrate, photosensitive devices, a color filter layer, a micro-lens layer and an infrared filter layer. The photosensitive devices are disposed in the substrate. The color filter layer is disposed to cover the photosensitive devices. The micro-lens layer is disposed on the color filter layer. The infrared filter layer directly covers the micro-lens layer.
Claims20
An image sensor, comprising:
- a substrate;
- a plurality of photosensitive devices disposed in the substrate;
- a color filter layer disposed to cover the photosensitive devices;
- a micro-lens layer disposed on the color filter layer;
- and
- an infrared filter layer directly covering the micro-lens layer, wherein a refractive index of the micro-lens layer is equal to a square root of a product of the refractive index of the infrared filter layer and a refractive index of the color filter layer.
3 more elements
An image sensor, comprising:
- a substrate;
- a plurality of photosensitive devices disposed in the substrate;
- an infrared color filter structure disposed to cover the photosensitive devices, wherein the infrared color filter structure comprises a color filter layer disposed over the substrate and an infrared filter layer disposed on the color filter layer;
- and
- a micro-lens layer disposed on the infrared color filter structure, wherein a refractive index of the infrared filter layer is equal to a square root of a product of a refractive index of the color filter layer and a refractive index of the micro-lens layer.
2 more elements
A method for manufacturing an image sensor, the method comprising:
- forming a plurality of photosensitive devices in a substrate;
- forming a color filter layer to cover the photosensitive devices;
- forming a micro-lens layer above the color filter layer;
- and
- forming an infrared filter layer to cover the micro-lens layer, wherein the micro-lens layer is formed to have a refractive index which is equal to a square root of a product of a refractive index of the infrared filter layer and a refractive index of the color filter layer.
2 more elements
Dependencies are inferred from the claim text.