Patent ID: 7795065
Filing Date: 2010-09-14
Classification: H01L

Abstract:
1. A method for manufacturing an image sensor, the method comprising: forming a readout circuitry on a pixel portion of a first substrate, and a peripheral circuitry on a peripheral portion of the first substrate; forming an interlayer dielectric including first lines connected with the readout circuitry and a second line connected with the peripheral circuitry on the first substrate; forming a second substrate comprising a crystalline semiconductor layer; forming a photodiode layer in the crystalline semiconductor layer; bonding the first substrate with the second substrate comprising the photodiode layer; removing a portion of the second substrate to expose the photodiode layer on the first substrate; forming device isolation trenches in the crystalline semiconductor layer separating regions of the photodiode layer to form a first photodiode and a second photodiode respectively connected with the first lines; forming a device isolation layer on the crystalline semiconductor layer including in the device isolation trenches; forming an upper electrode layer on the device isolation layer such that the upper electrode layer is connected with a portion of the first photodiode; removing a portion of the upper electrode layer to form an expose portion selectively exposing an upper region of the first photodiode; and forming a passivation layer on the interlayer dielectric on which the expose portion is formed.