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US 5,351,081 AGranted
Solid-state imaging device having a light barrier layer
AssigneeSony Corporation
InventorsHiromichi Matsui, Kazuomi Ezoe, Toshiro Kurusu
Life of this patent
Estimating the term…
Abstract
A solid-state imaging device in which a light-barrier layer is formed on transfer electrodes on top of a vertical pixel isolating region by an insulating film. The light-barrier layer is adapted to overlie the lateral sides of the transfer electrodes and the peripheral region of a photosensor region neighboring on the vertical pixel isolating region. By provision of the light-barrier layer, the light incident on the vertical pixel isolating region is stopped to reduce smear charges which might otherwise be intruded into the vertical charge transfer section.
Claims4
A CCD comprising:
- a plurality of pixels arrayed in a plurality of vertical columns,
- a plurality of vertical transfer sections arrayed parallel to said columns of pixels and completely covered with a light-barrier layer,
- a plurality of vertical pixel isolating regions adapted for vertically isolating said pixels from one another, by means of a potential barrier formed in a semiconductor substrate and a light-barrier layer, and said vertical pixel isolating regions each having a down slope of potential in the direction of said transfer section and arrayed between rows of said pixels, wherein said light-barrier layer completely covers the whole of said vertical pixel isolating region.
Dependencies are inferred from the claim text.