Patent ID: 7381586

Claim:
A method for manufacturing thin film transistors (TFTs), comprising the steps of: depositing a first conducting layer and patterning said first conducting layer to form a gate electrode on a substrate; depositing and patterning a high-dielectric-constant insulating layer on said gate electrode and part of said substrate; depositing a second conducting layer and patterning said second conducting layer to form a source electrode, a drain electrode, connecting circuits, and an open channel between said source electrode and said drain electrode; depositing and patterning a photo resist layer to form an open area on top of said open channel, and doing a surface treatment to enhance the adhesion of subsequent layer onto said open area; selectively forming an active channel layer on said open area of said photo resist using a low-temperature solution method, wherein said active channel layer overlaps said source electrode and said drain electrode; and stripping said photo resist layer and cleaning.