Patent ID: 6184069
Filing Date: 2001-02-06
Classification: H01L

Abstract:
A method for defining the self-aligned transparent conducting layer of the thin film transistor-liquid crystal display (TFT-LCD) over a substrate, wherein a first metal layer is formed on said substrate to define the gate structure and the storage electrode, a second metal layer is formed above said substrate to define the source/drain structures, and said transparent conducting layer is formed above said first metal layer and said second metal layer, said method comprises the following steps of:forming a negative photoresist on said transparent conducting layer;performing a front-side exposure and a back-side exposure to define said negative photoresist, wherein said first metal layer and said second metal layer are used to be masks in said back-side exposure, a first mask with the openings corresponding to said source/drain structures and the storage electrode is used in said front-side exposure;removing unexposed negative photoresist; andetching said transparent conducting layer for defining patterns on said transparent conducting layer by using said residual negative photoresist as a mask.