发明名称 |
Microlens integration |
摘要 |
A microlens of an inorganic material having a relatively high index of refraction is formed with a convex lower surface for refracting light from above through an underlying spacer layer to converge on a photodiode therebelow. The microlens and photodiode may be replicated in an array of such elements along with color filters and CMOS circuit elements on a semiconductor chip to provide an image sensor. The spacer layer, which has a relatively low refractive index, is subjected to a selective isotropic etch through an opening in an etch mask to define a concave surface that forms an interface with the convex lower surface of the microlens upon subsequent conformal deposition of the material of the microlens. <IMAGE> |
申请公布号 |
EP1473780(A2) |
申请公布日期 |
2004.11.03 |
申请号 |
EP20040252421 |
申请日期 |
2004.04.26 |
申请人 |
STMICROELECTRONICS, INC. |
发明人 |
FANG, MING;WANG, FUCHAO;DING, HAI |
分类号 |
G02B3/00;G02B27/10;H01L27/00;H01L27/14;H01L27/146;H01L31/00;H01L31/0216;H01L31/0232;H01L31/062;H01L31/10;H01L31/113 |
主分类号 |
G02B3/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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