Patent ID: 8193026

Claim:
A method of manufacturing an image sensor, the method comprising: polishing a light receiving part of the image sensor so that an upper part of an embedded via partially protrudes; forming a first insulating layer over the entire upper surface covering the protruding embedded via and the light receiving part; forming a photoresist pattern on an upper part of the first insulating layer, exposing a pad region; etching the first insulating layer using the photoresist pattern as an etching mask, thereby forming spacers at lateral sides of the protruding via; forming a second insulating layer over the entire surface covering the spacers, the via and the light receiving part and etching the second insulating layer; repeating the insulating layer forming and etching steps until widths of the spacers increase and an upper surface of the light receiving part is covered with the spacers; and forming a metal pad in the pad region in contact with the via.