Reflection type liquid crystal display provided with transparent pixel electrode and manufacture method thereof
In order to realize the manufacture of a reflection type liquid crystal display in the same manufacture processes as those of a transmission type liquid crystal display, a photolithography mask capable of forming both a gate electrode 22 and a reflective layer 23, and a photolithography mask capable of forming only the gate electrode 22 are prepared, and by using either one of the masks, the reflection type liquid crystal display in which both the gate electrode 22 and the reflective layer 23 are formed on a transparent insulation substrate 21, and the transmission type liquid crystal display in which only the gate electrode 22 is formed are selectively manufactured.
1. A method of manufacturing the reflection type liquid crystal display, comprising the steps of:
forming a plurality of switching elements on one surface of a liquid crystal display panel substrate, wherein said switching element is a thin film transistor;
forming a reflective layer with the same material as a gate electrode of said switching element during the step of forming said plurality of switching elements, said reflective layer being formed on the same plane as a plane of said gate electrode in the step of forming the gate electrode of said thin film transistor;
forming an insulation layer on said reflective layer;
forming a transparent pixel electrode on said insulation layer so as to be electrically connected to an electrode constituting said switching element; and
preparing a first mask for photolithography having a pattern to simultaneously form said gate electrode and the reflective layer on said substrate and a second mask for photolithography having a pattern to form only said gate electrode on said substrate; and using either one of said first and second masks to form both said gate electrode and said reflective layer, or only said gate electrode on said substrate.
2. The method of manufacturing the reflection type liquid crystal display according to claim 1 , comprising the step of forming a rough portion on said substrate before the step of forming said reflective layer, so that said reflective layer is formed to cover said rough portion.
3. The method of manufacturing the reflection type liquid crystal display according to claim 1 , comprising the step of forming a shielding film on said switching elements before the step of forming said transparent pixel electrode.