Patent ID: 8405097
Filing Date: 2013-03-26
Classification: H01L

Abstract:
1. An optical sensor, comprising: a first photosensitive layer having a first light incident surface, wherein a first light is emitted toward the first light incident surface to get into the first photosensitive layer; a first charge carrier collecting element on a surface of the first photosensitive layer opposite to the first light incident surface of the first photosensitive layer, wherein the first charge carrier collecting element is for collecting a charge carrier transformed from the first light by the first photosensitive layer; a second photosensitive layer adjacent to the first photosensitive layer and having a second light incident surface, wherein a second light is emitted toward the second light incident surface to get into the second photosensitive layer; and a second charge carrier collecting element on a surface of the second photosensitive layer opposite to the second light incident surface of the second photosensitive layer, wherein the second charge carrier collecting element is for collecting a charge carrier transformed from the second light by the second photosensitive layer, wherein, a wavelength of the first light and a wavelength of the second light are different, a thickness of the first photosensitive layer and a thickness of the second photosensitive layer are different.