Image pickup device and production method thereof
AssigneeFujitsu Semiconductor Limited
InventorsNaoyuki Watanabe, Toshiyuki Honda, Yoshito Akutagawa, Susumu Moriya, Izumi Kobayashi
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Abstract
An image pickup device is disclosed that has little deformation caused by thermal expansion of a transparent resin for sealing an image pickup element. The image pickup device includes an image pickup element having a light receiving surface, a micro-lens for condensing incident light to the image pickup element, a first transparent plate disposed on the light receiving surface of the image pickup element with the micro-lens in between, a transparent resin that seals the image pickup element and the first transparent plate, and a second transparent plate disposed on the transparent resin to face the first transparent plate.
Claims11
An image pickup device, comprising:
- an image pickup element having a light receiving surface;
- a lens arranged on the light receiving surface;
- a first transparent plate made of a glass material disposed over the lens on the light receiving surface of the image pickup element, but not directly contacting the light receiving surface, the first transparent plate having a surface, the surface facing the lens, and the surface being flat at least at a position directly above a position of the lens, wherein a substance different from both the first transparent plate and the lens is in existence between the surface of the first transparent plate and the lens;
- a transparent material disposed on an upper surface of the first transparent plate and that seals the image pickup element;
- and
- a second transparent plate made of a glass material directly contacting an upper surface of the transparent material,
- wherein the light receiving surface includes a photodiode, and light incident from outside the image pickup device reaches the photodiode through the lens after passing through the first transparent plate, and
- wherein the lens, the first transparent plate, and the second transparent plate are arranged in the following order:
- the lens, the first transparent plate, and the second transparent plate.
A method of producing an image pickup device, comprising:
- disposing an image pickup element having a light receiving surface on a substrate;
- disposing a lens on the light receiving surface;
- disposing a first transparent plate made of a glass material on the image pickup element and over the lens, the first transparent plate having a surface, the surface facing the lens, and the surface being flat at least at a position directly above a position of the lens, wherein a substance different from both the first transparent plate and the lens is in existence between the surface of the first transparent plate and the lens;
- connecting the image pickup element with an electrode arranged on the substrate;
- arranging a second transparent plate made of a glass material in a mold;
- arranging the substrate on which the image pickup element and the first transparent plate are disposed so that the first transparent plate faces the second transparent plate;
- and
- sealing the image pickup element and an upper surface of the first transparent plate with a transparent material so that the second transparent plate faces the first transparent plate across the material,
- wherein the light receiving surface includes a photodiode, and light incident from outside the image pickup device reaches the photodiode through the lens after passing through the first transparent plate, and
- wherein the lens, the first transparent plate, and the second transparent plate are arranged in the following order:
- the lens, the first transparent plate, and the second transparent plate.
Dependencies are inferred from the claim text.