Image sensor and method for manufacturing it

TL;DR: In this article, the authors proposed a method to reduce the amount of light input into a photodiode by using a plurality of picture elements which are arranged in active region formed on a substrate and generate a signal corresponding to input light.

Abstract: PROBLEM TO BE SOLVED: To provide an image sensor and a method manufacturing it, in which loss of the amount of light input into a photodiode is reduced. SOLUTION: The image sensor includes: a plurality of picture elements which are arranged in active region formed on a substrate and generate a signal corresponding to input light; dummy pixels arranged in perimeter region formed around the active region; an interlayer insulating film which covers the active region and the perimeter region, has a first thickness in the active region, and has a second thickness in the perimeter region, the second thickness being smaller than the first thickness; a color filter having a first color filter C1, a second color filter C2, and a third color filter C3, which are disposed in the active region and are formed so as to correspond to each picture element; an optical shielding member 20 which is arranged on the interlayer insulating film corresponding to the perimeter region and which is formed at the same height as that of the top face of the color filter; and flat film 30 formed on the color filter and the optical shielding member. COPYRIGHT: (C)2008,JPO&INPIT