Solid-state image pickup apparatus
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United States of America Patent
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Jan 9, 2018
Grant Date -
Apr 14, 2016
app pub date -
Dec 17, 2015
filing date -
Dec 18, 2009
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Abstract
Provided is a back-illuminated solid-state image pickup apparatus having an improved color separation characteristic. A photo detector includes a first photo detector unit and a second photo detector unit disposed deeper than the first photo detector unit with respect to a back surface of a semiconductor substrate, wherein the first photo detector unit includes a first-conductivity-type first semiconductor region where carriers generated through photo-electric conversion are collected as signal carriers. A readout portion includes a first-conductivity-type second semiconductor region extending in a depth direction such that the carriers collected in the first semiconductor region are read out to a front surface of the semiconductor substrate. A unit that reduces the amount of light incident on the second semiconductor region is provided.
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