Patent ID: 7623204

Claim:
A method of making a reflection type liquid crystal display device comprising the steps of: forming a source and a drain on an insulating substrate; forming a thin film transistor and gate electrode wiring in a stack in which a silicon layer, a gate insulating film and a gate electrode layer are stacked in this order as viewed in a direction substantially normal to the substrate on surfaces of the source and drain and the substrate; forming a passivation film on the insulating substrate, the passivation film having a first opening therethrough corresponding to a position of the source; forming an interlayer insulating film on the passivation film; roughening a surface of the interlayer insulating film; forming a second opening through the interlayer insulating film in a position corresponding to the first opening, wherein the steps of roughening the surface of the interlayer insulating film and of forming the second opening are carried out simultaneously; forming a reflection electrode on the roughened surface of the interlayer insulating film and through the first and second openings to the source, the reflection electrode having a roughness corresponding to a roughness of the roughened surface of the interlayer insulating film and being electrically connected to the source; forming a capacitor electrode on the insulating substrate simultaneously with the formation of the source and drain; and forming a storage capacitor that includes the capacitor electrode simultaneously with the formation of the thin film transistor in a stack in which a silicon layer, gate insulating film and gate electrode layer are stacked in a direction normal to the insulating substrate on the insulating substrate, wherein the passivation film has the storage capacitor formed thereon, has a third opening for the storage capacitor formed simultaneously with the formation of the first opening for the thin film transistor, wherein the third opening penetrates through the passivation film to the storage capacitor electrode; wherein the interlayer insulating film has a fourth opening for the storage capacitor formed simultaneously with the formation of the rough surface so that it extends through the interlayer film; and wherein the reflection electrode extends through the third and fourth openings to be electrically connected to the capacitor electrode.