Patent ID: 7776225
Filing Date: 2010-08-17
Classification: H01L

Abstract:
1. A method for forming an on-chip lens, comprising: a depositing step of depositing a base film on a surface of a substrate, the base film being translucent and made of a first material; and a digging step of digging a depression in a portion of the base film, wherein the digging step includes a depositing substep of depositing a pattern film on a surface of the base film, the pattern film being made of a second material and in an inverted shape of the depression, a forming substep of forming an embedding film to flatten the surface of the pattern film, the embedding film being made of a third material and embedding therein the pattern film, and an etch-back substep of conducting etch-back on a surface of the embedding film toward the base film to dig the depression, and an etch rate of the second material is higher than an etch rate of the third material.