Patent ID: 6403408
Filing Date: 2002-06-11
Classification: H01L

Abstract:
A method of forming a thin film transistor comprising:providing first electrode layers over a transparent substrate, the first electrode layers comprising a lower transparent layer, and an upper opaque layer; patterning the first electrode layers to define a first electrode pattern in which an edge region of the transparent layer extends beyond an edge region of the opaque layer; providing a transistor body comprising a semiconductor layer defining the channel area of the transistor and a gate insulator layer; providing an upper transparent second electrode layer; providing a layer of negative resist over the second electrode layer; exposing the layer of negative resist through the substrate such that regions of the negative resist layer shadowed by the opaque layer of the first electrode pattern remain unexposed; and removing the unexposed negative resist and the underlying second electrode layer to define a second electrode pattern which is substantially aligned with the opaque layer of the first electrode pattern.