Patent ID: 6566160
Filing Date: 2003-05-20
Classification: H01L

Abstract:
A method of increasing both adhesion of color filters and preventing cross talk effects on a semiconductor wafer, the semiconductor wafer comprising a substrate, a plurality of metal-oxide semiconductor (MOS) transistor sensors positioned on the substrate, and a plurality of insulators positioned on the substrate, and each insulator positioned between each two MOS transistor sensors, the method comprising:forming a dielectric layer on the semiconductor wafer and covering both the MOS transistor sensors and the insulators; forming a plurality of metal layers on the dielectric layer, each two metal layers being positioned approximately above two sides of one of the MOS transistor sensors; forming a passivation layer on the dielectric layer and on the metal layers; forming a first color filter on the passivation layer, wherein the first color filter is positioned above one of the MOS transistor sensors, and two sides of the first color filter are aligned approximately above the two metal layers; and forming a second color filter and a third color filter on the passivation layer, and portions of both the second color filter and the third color filter covering one side of the first color filter, respectively; wherein the portion of the second color filter covering the first color filter and the portion of the third color filter covering the first color filter are both used to increase contact areas of the color filters so as to enhance adhesion of the color filters, and simultaneously, the portion of the second color filter covering the first color filter and the portion of the third color filter covering the first color filter are both used as barriers to prevent cross talk effects.