Patent ID: 7253018
Filing Date: 2007-08-07
Classification: H01L

Abstract:
1. A method for fabricating a complementary metal-oxide semiconductor image sensor, comprising the steps of: forming a pad insulating layer formed on a sub-layer having a photodiode and a plurality of transistors formed thereon; forming a first insulating layer having an uneven surface on the pad insulating layer; depositing a second insulating layer on the first insulating layer by using a high deposition plasma process; additionally depositing the second insulating layer, so as to form a dome-shaped portion over a projected portion of an uneven surface of the first insulating; and etching-back the second insulating layer so that the second insulating layer covers upper and side surfaces of the projected portion of the first insulating layer to form the dome-shaped portion, thereby forming a micro-lens including the projected portion of the first insulating layer and the dome-shaped portion of the second insulating layer covering the projected portion of the first insulating layer.