Patent ID: 8508640
Filing Date: 2013-08-13
Classification: H01L,H04N

Abstract:
1. A back side illumination type solid-state imaging device comprising an imaging area in which a plurality of unit pixels each including a photoelectric conversion section and a signal scan circuit section are arranged on a semiconductor substrate, and a light illumination surface formed on a surface of the semiconductor substrate located opposite a surface of the semiconductor substrate on which the signal scan circuit section is formed, wherein the unit pixel comprises a high-sensitivity pixel and a low-sensitivity pixel with a lower sensitivity than the high-sensitivity pixel, each of the high-sensitivity pixel and the low-sensitivity element comprises a first pixel separation layer located on a light illumination surface side in the semiconductor substrate to separate the pixels from each other and a photodiode, and further comprises a first micro lens and a second micro lens both configured to focus light on the photo diode, the first micro lens being larger than the second micro lens in area, and on the light illumination side of the semiconductor substrate, an opening between the first pixel separation layers in the high-sensitivity pixel is larger than an opening between the first pixel separation layers in the low-sensitivity pixel.