Patent ID: 6573127
Filing Date: 2003-06-03
Classification: H01L,Y10S

Abstract:
A method of making a thin-film transistor, comprising the steps of:depositing a first metal layer, formed of a metal exhibiting tensile stress, on a substrate; depositing a second metal layer, formed of a material exhibiting compressive stress, 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 photoresist as a mask, the first metal layer being etched to have a width greater than a width of the second metal layer, wherein the second metal layer is formed only on a portion of the first metal layer, leaving two side portions on a horizontal upper surface of the first metal layer having no second metal layer formed thereon, thus forming a gate having a laminated structure of the first and second metal layers; and removing the photoresist, wherein the steps of patterning the second metal layer and the first metal layer each comprises a single etching step.