Solid-state imaging device and manufacturing method thereof
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United States of America Patent
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Issued Date -
Dec 30, 2004
app pub date -
Jun 23, 2004
filing date -
Jun 27, 2003
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Abandoned
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Abstract
This invention provides a solid-state imaging device which enables its cell area to be reduced while maintaining a light receiving area. First, a plurality of isolation areas are formed in a semiconductor substrate. Then, p-type well is formed by implanting p-type impurity into the interior organization of an active area surrounded by the isolation areas. Next, by using ion implantation method, a charge accumulating area, which is a n-type semiconductor area, is formed deep in the p-type well. Consequently, photo diode is formed in a deep portion apart from the surface of the semiconductor substrate. After that, an electric transferring MIS transistor is formed above and apart from the charge accumulating area, so that the photo diode and the MIS transistor are formed in a vertical structure.
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