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US 6,549,259 B2Granted
Liquid crystal display panel and fabrication method of the same
AssigneeNEC Corporation
InventorsYuko Sato, Mitsuhiro Sugimoto
Life of this patent
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Abstract
In a liquid crystal display panel, a gap between an array substrate 2a and an opposing substrate 3 is made constant by using spacers 23 mixed in a seal agent 22 provided around a display area A. A bottom-up pattern 17 formed in the same layer as that of a light shield 16 is formed in a seal area B and a leveling layer 19 on the seal area B is made thinner in order to minimize an amount of sink of the spacers 23 into the leveling layer 19 thereby make the gap between the substrates uniform.
Claims20
A liquid crystal display panel comprising:
- an array substrate having a switching element array;
- an opposing substrate opposing to said array substrate;
- a liquid crystal layer disposed between said array substrate and said opposing substrate;
- a seal member sealing said liquid crystal layer within said display panel;
- a spacer disposed within said seal member so as to make a gap between said array substrate and said opposing substrate constant;
- and
- a leveling layer formed on said switching element array, said leveling layer being provided with one of an opening area and a thin region at a seal area of said seal member, said thin region being thinner than thickness of said leveling layer on each switching element of said switching element array.
4 more elements
A fabrication method for fabricating a liquid crystal display panel, comprising:
- patterning steps of forming at least switching elements, wiring lines and a light shielding layer on a transparent substrate;
- leveling layer coating step of forming a leveling layer on a surface of a wafer on which the patterns are formed in the patterning steps by coating;
- step of forming pixel electrodes on said leveling layer;
- step of providing a seal containing spacers in mixed state;
- and
- step of forming a bottom-up pattern layer for increasing height of an underlying layer of said leveling layer in said seal area of said transparent substrate.
3 more elements
Dependencies are inferred from the claim text.