Patent ID: 8908070
Filing Date: 2014-12-09
Classification: H01L,H04N

Abstract:
1. A solid state imaging device comprising: a semiconductor substrate; an impurity layer formed over the semiconductor substrate; a plurality of pixels arranged in a predetermined pattern over the impurity layer, the pixels having photodiodes for generating signal charge through photoelectric conversion and accumulating the signal charge, the pixels producing an image signal of a subject image formed by an optical system, the pixels including at least a pair of two types of focus detection pixels for producing an image signal for focus detection of the optical system using a phase difference method; and an area control layer formed between the semiconductor substrate and the two types of the focus detection pixels, the area control layer making thickness of one of first and second photoelectric conversion areas less than thickness of the other in the photodiode of each of the two types of the focus detection pixels, the first photoelectric conversion areas of the photodiodes of the two types of the focus detection pixels face toward each other, the second photoelectric conversion area being on opposite side of the first photoelectric conversion area in the each photodiode.