Patent ID: 7781252

Claim:
A method of manufacturing a CMOS image sensor, the method comprising: forming a first insulating film on a silicon semiconductor substrate which includes a metal pad; selectively etching the first insulating film in order to form a first insulating film pattern which includes a first opening portion which exposes a portion of the metal pad; forming a metal pad protective film in the first opening portion with a predetermined thickness; forming a second insulating film over the first insulating film pattern and metal pad protective film; selectively etching the second insulating film in order to form a second insulating film pattern which includes a second opening portion which exposes a portion of the metal pad protective film; forming a color filter array (CFA) on the second insulating film pattern; forming micro lenses on the CFA; and performing an etching process to remove the metal pad protective film, so as to form a metal pad opening portion; wherein the metal pad protective film is formed of an oxide film (SiO.sub.2) with a thickness of between 10 and 200 .ANG and is formed at a temperature of between 300 and 400 degree for between 1 and 120 min.