Patent ID: 6319760
Filing Date: 2001-11-20
Classification: G02F

Abstract:
A method for manufacturing a liquid crystal display having a high transmittance and a high aperture ratio, comprising the steps of:providing a transparent insulating substrate having a displaying area and a non-displaying area;forming a light shielding pattern and a common signal line on the non-displaying area of the transparent insulating substrate with a first opaque metal layer;forming a counter electrode on the displaying area of the transparent insulating substrate with a first transparent metal layer;depositing an insulating layer over the transparent insulating substrate so as to cover the light shielding pattern and the common signal line, and the counter electrode;forming source and drain electrodes and a data bus line, which is connected to the source electrode, on the insulating layer with a second opaque metal layer, each of the source and drain electrodes having a portion overlapped with the light shielding pattern;forming a pixel electrode on the insulating layer over the displaying area of the transparent insulating substrate with a second transparent metal layer;forming a channel layer over the light shielding pattern and on the portions of the source and drain electrodes overlapped with the light shielding pattern; andforming a gate bus line having a gate insulating layer on the channel layer, whereby the liquid crystal display is made with a substantially reduced number of photolithography steps, improving productivity and production yield.