Patent ID: 6716680
Filing Date: 2004-04-06
Classification: G02F,H01L

Abstract:
A method of forming a TFT-LCD device on a transparent insulating substrate wherein a transistor is defined on the transparent insulating substrate, the method comprises the following steps of:forming a photosensitive layer on said transparent insulating substrate to cover said transistor and said transparent insulating substrate; performing a defocused exposing procedure by applying a mask with a plurality of independent spot patterns and a contact hole pattern to define patterns on said photosensitive layer, wherein a distance between two adjacent said independent spot patterns is smaller than a resolution of an exposure system while a distance between adjacent said independent spot pattern and said contact hole pattern is larger than said resolution of said exposure system, wherein a first area of said photosensitive layer corresponding to said independent spot patterns is exposed incompletely while a second area thereof corresponding to said contact hole pattern is exposed completely; developing said photosensitive layer to partially remove said photosensitive layer of said first area to form wave shaped surfaces thereon and to partially remove said photosensitive layer of said second area to form a contact hole thereon; and forming a pixel electrode on said photosensitive layer to fill said contact hole to electrically connect to said transistor, wherein said pixel electrode rises and falls with the surface of said photosensitive layer to server as a rough diffuser member.