Solid-state imaging device
AssigneeMatsushita Electric Industrial Co., Ltd.
InventorShinji Uchida
Life of this patent
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Abstract
A conventional solid-state imaging device in which a sealing resin is applied onto a microlens has a low condensing efficiency. There are provided a photodiode 14 for receiving light, a microlens 4 made of a resin set on the photodiode 14 and having a refractive index of n3, a thin-film lens 3 formed on the microlens 4 and having a refractive index of n2, a sealing resin 2 formed on the thin-film lens 3 and having a refractive index of n1, and cover glass 1 formed on the sealing resin 2 to seal the sealing resin 2. The refractive index n2 of the thin-film lens 3 is set to a value smaller than n1 and n3. In this case, it is assumed that values of n1 and n3 are substantially equal to each other and the thin-film lens 3 is made of fluoride and/or oxide.
Claims11
A solid-state imaging device comprising:
- a light-receiving portion for receiving light;
- a microlens formed on said light-receiving portion and having a predetermined first refractive index, the microlens having a central portion;
- a thin-film lens formed of an inorganic material on the microlens;
- and
- a resin portion formed on the thin-film lens and having a predetermined second refractive index, a refractive index of the thin-film lens being smaller than the first and second refractive indexes, wherein
- light incident on the thin-film lens from the resin portion is refracted to outside the microlens central portion due to the difference in refractive index between the resin portion and the thin-film lens, and the light refracted to outside the microlens central portion is made to condense on the light-receiving portion due to the difference in refractive index between the thin-film lens and the microlens.
A solid-state imaging device comprising:
- a light-receiving portion for receiving light;
- a microlens formed on the light-receiving portion and having a curved face, a predetermined first refractive index, and a central portion;
- a thin-film lens formed on the microlens;
- and
- a resin portion formed on the thin-film lens and having a predetermined second refractive index, wherein
- a refractive index of the thin-film lens is smaller than the first and second refractive indexes,
- the thin-film lens is a flat member made of resin curved along the curved face of the microlens, and
- light incident on the thin-film lens from the resin portion is refracted to outside the microlens central portion due to the difference in refractive index between the resin portion and the thin-film lens, and the light refracted to outside the microlens central portion is made to condense on the light-receiving portion due to the difference in refractive index between the thin-film lens and the microlens.
Dependencies are inferred from the claim text.