Patent ID: 7547565

Claim:
A method of fabricating an optical interference color display, comprising: providing a substrate, and forming a first electrode structure over the substrate; defining a first area, a second area, and a third area on the first electrode structure; forming a first sacrificial layer over the first electrode structure inside the first area, the second area and the third area; forming a second sacrificial layer over the first sacrificial layer inside the second area and the third area; forming a third sacrificial layer over the second sacrificial layer inside the third area, wherein the first sacrificial layer, the second sacrificial layer and the third sacrificial layer have different etching rates, wherein the etching rate of the second sacrificial layer is higher than the etching rate of the first sacrificial layer, and wherein the etching rate of the third sacrificial layer is higher than the etching rate of the second sacrificial layer; forming a patterned support layer over the first electrode structure; forming a second electrode layer over the first sacrificial layer inside the first area, the second sacrificial layer inside the second area, the third sacrificial layer inside the third area and a portion of the patterned support layer; and removing the first sacrificial layer, the second sacrificial layer and the third sacrificial layer to form a plurality of air gaps between the first electrode structure and the second electrode layer wherein the plurality of air gaps provides a plurality of colors.