Patent ID: 6512220
Filing Date: 2003-01-28
Classification: H01L

Abstract:
A semiconductor image sensor for detecting a light incident thereto, comprising:a semiconductor substrate divided into a light sensing region and a peripheral circuit region; a photodiode formed on top of the light sensing region; at least one transistor formed on top of the peripheral circuit region; at least one insulating layer formed on top of the photodiode and the transistor; and an optical layer formed on the insulating layer to efficiently transmit the light to the photodiode, wherein a thickness (tOL) of the optical layer is determined by as follows: tOL=(2&it;N-1)Ã—Î»4Ã—nOLwhere, nOL, N and &lgr; represent a refractive index of the optical layer, a positive integer, and a wavelength of the light incident, respectively, wherein the refractive index of the optical layer corresponds to root times as much as a refractive index of the insulating layer.