Patent ID: 6466279
Filing Date: 2002-10-15
Classification: G02F

Abstract:
A process for preparing a liquid crystal display device, comprising the steps of:(A) forming a metallic thin film on a transparent electrode substrate followed by forming gate electrode, gate wire and gate terminals by photolithographic processing; (B) forming successively a-Si layer which forms a semiconductive layer and n+-type Si layer which forms an ohmic contact layer to cover said gate electrode and gate wire followed by pattering both of said layers into islands; (C) forming a metallic thin film on said both layers followed by forming source electrode, source wire, drain electrode and data side terminal by photolithographic processing, removing unnecessary part of said n+-type Si layer between said source and drain electrodes to form a back channel; (D) forming a first organic interlaminar insulating layer over the laminated surface of said substrate comprising said back channel followed by curing completely, and forming a second organic interlaminar insulating layer thereon followed by half curing, coating further thereon a positive photoresist whose essential ingredient is a novolak resin followed by pre-baking, partially light-exposing said positive photoresist for solbulization thereof with a light-exposing apparatus and simultaneously solbulizing said second organic interlaminar insulating film and removing solbulized positive photosensitive resist and second organic interlaminar insulating film to make a contact-through hole; (E) after mid-baking in an oven, removing unnecessary parts of said first organic interlaminar insulating film and said gate insulating film which are uncovered with a mask of said positive photoresist remained followed by removing said positive photosensitive resist; and (F) forming a transparent conductive film followed by patterning it into pixel electrode.