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US 2006/0033008 A1Published application
Image sensor
AssigneeSTMicroelectronics S.r.l.
InventorJerome Vaillant
Life of this patent
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Abstract
An image sensor pixel structure including a photosensitive area; a stacking of insulating layers covering the photosensitive area; and a device for focusing the light of the pixel to the photosensitive area. The focusing device includes first and second microlenses, the first microlens being arranged between layers of the stacking and substantially conjugating the second microlens with the photosensitive area.
Claims10
An image sensor pixel structure comprising:
- a photosensitive area,
- a stacking of insulating layers covering the photosensitive area, and
- a device for focusing the pixel light on the photosensitive area, comprising first and second microlenses, the first microlens being arranged between layers of the stacking and substantially conjugating the second microlens with the photosensitive area.
A method for manufacturing an image sensor, comprising the steps of:
- forming a photosensitive area at the level of a substrate;
- forming a first stacking of insulating layers;
- forming for each photosensitive area a first microlens;
- forming a second stacking of insulating layers;
- and
- forming for each photosensitive area a second microlens so that the first corresponding microlens conjugates the second corresponding microlens with said photosensitive area.
3 more elements
Dependencies are inferred from the claim text.