US 8,558,983 B2 · Liquid crystal display device and manufacturing method thereof

Abstract

An electro-optical device typified by an active matrix type liquid crystal display device, is manufactured by cutting a rubbing process, and in addition, a reduction in the manufacturing cost and an improvement in the yield are realized by reducing the number of process steps to manufacture a TFT. By forming a pixel TFT portion having a reverse stagger type n-channel TFT, and a storage capacitor, by performing three photolithography steps using three photomasks, and in addition, by having a uniform cell gap by forming wall-like spacers by performing one photolithography step, without performing a rubbing process, a multi-domain perpendicular orientation type liquid crystal display device having a wide viewing angle display, and in which a switching direction of the liquid crystal molecules is controlled, can be realized.

Claims15

Dependent claims

A liquid crystal display device comprising:

a first substrate having a pixel portion;
a TFT over the first substrate;
a pixel electrode over the first substrate and electrically connected to the TFT;
a second substrate opposite to the first substrate;
a transparent conductive film over the second substrate;
a plurality of spacers formed over the transparent conductive film and located between the first substrate and the second substrate, wherein the plurality of the spacers are arranged in a stripe shape;
a sealing material bonding the first substrate and the second substrate, the sealing surrounding the pixel portion;
and
a liquid crystal material between the first substrate and the second substrate,
wherein each of the plurality of the spacers is in a straight line shape and has a first surface facing the first substrate, a second surface facing the second substrate and a sloped surface having a curved portion, the second surface being larger than the first surface, and
wherein the first surface and the second surface are substantially parallel to each other.

8 more elements

Dependencies are inferred from the claim text.

Liquid crystal display device and manufacturing method thereof

Life of this patent

Liquid crystal display device and manufacturing method thereof

Life of this patent

Abstract

Claims15