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US 7,842,980 B2Granted
Image sensor microlens structures and methods of forming the same
AssigneeSamsung Electronics Co., Ltd.
InventorJin-Hyeong Park
Life of this patent
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Abstract
An image sensor includes a light receiving device in a substrate, a color filter over the light receiving device, a buffer film over the color filter, and a microlens on the buffer film. The microlens has a concave bottom face and a convex top face. The buffer film has a substantially flat top outside the microlens and has a convex top face below the microlens.
Claims14
An image sensor, comprising:
- a light receiving device in a substrate;
- a color filter over the light receiving device;
- a buffer film over the color filter;
- and
- a microlens on the buffer film, the microlens having a concave bottom face and a convex top face.
- wherein the buffer film has a substantially flat top outside the microlens and has a convex top face below the microlens, and
- wherein a refractive index of the buffer film is less than a refractive index of the microlens.
4 more elements
An image sensor, comprising:
- a plurality of light receiving devices in a substrate;
- a plurality of color filters over the plurality of light receiving devices;
- a buffer film over the color filter;
- and
- a plurality of spaced apart microlenses on the buffer film, each of the plurality of spaced apart microlenses having a concave bottom face and a convex top face,
- wherein the buffer film has a substantially flat top face between adjacent microlenses and has a convex top face below each microlens, and
- wherein a refractive index of the buffer film is less than a refractive index of the microlens.
4 more elements
Dependencies are inferred from the claim text.