Patent ID: 9087759
Filing Date: 2015-07-21
Classification: H01L

Abstract:
1. A method, comprising: providing a carrier wafer having a pixel area and a peripheral area; stacking a first image sensing structure on the carrier wafer, the first image sensing structure having a first portion in the pixel area for sensing incident light in a red color wavelength band and a second portion in the peripheral area; forming a first conductive through-silicon via (TSV) in the second portion of the first image sensing structure; forming a first conductive bump structure on the first conductive TSV; stacking a second image sensing structure above the first image sensing structure and on the first conductive bump structure, the second image sensing structure having a third portion in the pixel area for sensing incident light in a green color wavelength band and a fourth portion in the peripheral area; forming a second conductive TSV in the fourth portion of the second image sensing structure; forming a second conductive bump structure on the second conductive TSV; and stacking a third image sensing structure above the second image sensing structure and on the second conductive bump structure, the third image sensing structure having a fifth portion in the pixel area for sensing incident light in a blue color wavelength band and a sixth portion in the peripheral area.