Patent ID: 6525351
Filing Date: 2003-02-25
Classification: H01L

Abstract:
A solid-state imaging device comprising:a first impurity layer forming part of a photodiode; a second impurity layer being of a conductive type identical to that of the first impurity layer and having an impurity concentration lower than that of the first impurity layer; a third impurity layer being of a conductive type different from that of the first impurity layer; a fourth impurity layer being of a conductive type identical to that of the first impurity layer; wherein the second impurity layer, the third impurity layer and the fourth impurity layer are formed such that: the second impurity layer is formed so as to be under and extending outwardly beyond the first impurity layer, the third impurity layer is formed under a portion of the second impurity layer and not formed under another portion of the second impurity layer so as to exclude at least a part of a non-imaging region, and the fourth impurity layer is formed so a portion thereof is under the third impurity layer and so another portion thereof is under the said another portion of the second impurity layer; and a fifth impurity layer being formed under the fourth impurity layer, being of a conductive type identical to that of the fourth impurity layer and having an impurity concentration higher than that of the fourth impurity layer.