Patent ID: 7605026

Claim:
A method of fabricating self-aligned metal oxide TFTs on transparent flexible substrates comprising the steps of: providing a transparent flexible substrate having a front surface and a rear surface; positioning at least an opaque first metal TFT electrode in a supporting relationship on the front surface of the substrate; depositing a layer of transparent material, including at least one of a metal oxide semiconductor and a gate dielectric, on the front surface of the substrate and the first metal TFT electrode; positioning a layer of photoresist in overlying relationship to the layer of transparent material; positioning a first photo mask over the rear surface of the substrate in non-critical alignment; exposing portions of the layer of photoresist using the first photo mask and using the opaque first metal TFT electrode as a self-alignment mask; positioning a second photo mask over the front surface of the substrate in non-critical alignment; exposing portions of the layer of photoresist using the second photo mask; and developing the layer of photoresist and forming a layer of second metal using the developed layer of photoresist.