Patent ID: 7768613

Claim:
A method of producing an active matrix substrate of a transverse electric field type active matrix liquid crystal display device, comprising the following steps of: forming patterns for scanning lines; separating silicon elements for thin film transistors from a semiconductor layer; forming video signal lines and liquid crystal drive electrodes at the same time; forming spacer bumps that cover the video signal lines, or simultaneously forming spacers and insulation bumps that cover the video signal lines at the same time, where the spacer bumps and the insulation bumps are formed via a halftone exposure process, thereby creating a taper angle of less than 30 degrees at each edge of the bump; forming contact holes for terminal portions and for static electricity protection circuits; and forming transparent common electrodes for shielding the video signal line and transparent common electrodes within pixels at the same time; wherein said halftone exposure process includes a step of utilizing a light transmission adjustable photomask having a translucent area or conducting a two-step exposure process by utilizing a normal photomask; and wherein said steps of forming the video signal line and the insulation bump are conducted so that a distance between an edge of the video signal line and an edge of the insulation bump at the same sides is in a range between 3.0 micrometers and 6.0 micrometers.