Patent ID: 6340610
Filing Date: 2002-01-22
Classification: H01L

Abstract:
A method of making a thin-film transistor, comprising the steps of:depositing a first metal layer on a substrate, the first metal layer including aluminum; depositing a second metal layer on the first metal layer directly after the step of depositing the first metal layer; forming a single photoresist having a predetermined width on the second metal layer; patterning the second metal layer using the single photoresist as a mask; patterning the first metal layer using the single photoresist as a mask, the first metal layer being etched to have a width greater than a width of the second metal layer by about 1 to 4 &mgr;m to prevent hillock at the sides of the aluminum first metal layer, thus forming a gate having a laminated structure of the first and second metal layers; and removing the single photoresist; wherein the steps of patterning the second metal layer and the first metal layer each comprise a single step.