摘要:
An improved process for manufacturing a thin film transistor uses two masks for etching and therefore one mask alignment. The technical effect of said process is to provide the thin film transistor with low cost and enhanced yield.
摘要:
A thin film transistor where source and drain electrodes are film laminates including at least two layers. A first layer film of the laminate, which is formed to a thickness of 10 to 700 .ANG. is in ohmic contact with underlying semiconductor film. A second layer film, formed on the first layer film has a thickness of more than about 2000 .ANG. and is a material having a sufficient adhesion strength even when formed at a temperature which is less than the temperature corresponding to the materials vapor pressure. Further, the materials used for the source and drain electrodes can be formed into thin films by ordinary sputtering or vacuum deposition techniques, low in cost, and readily available. A thin film transistor according to the present invention is formed on a substrate by the steps of: forming a gate electrode on the substrate; oxidizing the gate electrode to form a gate insulating film, the gate electrode and the gate insulating film forming a step; forming a thin film semiconductor on the gate insulating film; forming a first layer film portion of a source and drain electrode film laminate on the thin film semiconductor and in ohmic contact with the thin film semiconductor; and forming a second layer film portion of the source and drain electrode film laminate, the second layer film being an adhesion layer, convering the first layer film, and having a sufficient thickness to provide a continuous film across the step.
摘要:
The invention relates to a nematic liquid-crystal composition for active matrix displays with high voltage holding ratio and extremely good low temperature stability.
摘要:
It is an object of the present invention to provide a polymer dispersion-type liquid crystal display device having a high holding rate, a superior display quality and a high reliability; the liquid crystal display device according to the present invention composed of (i) a display electrode substrate, (ii) a counter electrode substrate and (iii) a liquid crystal layer interposed between said display electrode substrate and said counter electrode substrate, in which liquid crystals having a positive anisotropy in dielectric constant are dispersed in a transparent polymer; the transparent polymer is a photo cation polymerization setting-type transparent polymer and the liquid crystals are fluorine-containing aryl compounds.
摘要:
The lighting device is equipped with a light guide having a linear Fresnel reflection surface consisting of steps of continuously alternating reflecting surfaces having two different reflection angles. A light source is installed at one end of the light guide of the above construction so that the light from the light source is emitted from the irradiation surface of the light guide after being reflected by the linear Fresnel reflection surface.
摘要:
A liquid crystal display comprising two substrates and a nematic liquid crystal present between said two substrates, wherein each of said substrates comprises a glass plate, an electrode thereon and an aligning layer subjected to a molecular aligning treatment for a pretilt angle of 1.degree. to 30.degree. on the electrode, wherein an optically active material is added to the nematic crystal which has a positive dielectric anisotropy, wherein the average alignment direction in the longer direction of said liquid crystal molecule is twisted at an angle .phi. of 210.degree. to 300.degree. to impart a spiral structure to the liquid crystal and a ratio d/p of the spiral pitch p of the liquid crystal molecule and the liquid crystal thickness d are(.phi./360-1/4)
摘要:
There discloses a liquid-crystal display device which is effective for the display of images particularly in a TV set and in which the liquid-crystal layer contains a dopant in a specific range of quantity and insulating layer is treated with an alkoxysilane coupling agent containing a glycidoxy group.
摘要:
A nematic-phase liquid crystal material is sandwiched between two opposing parallel plates at least one of which is transparent. The two parallel plates are respectively coated with transparent electrode films having parallel micro-groove structures at the respective inner surfaces in contact with the nematic-phase liquid crystal material established by unidirectional rubbing. In particular, an additional or second micro-groove structure is further provided for said fist-named micro-groove structure which has an asymmetric or anisotropic profile along the longitudinal axes of the respective micro-grooves within the first micro-groove structure, preferably of a substantially saw-tooth profile. This combination results in a surface anisotropy in solid geometry rather than in plane geometry in the interfacial surfaces. The surface anisotropies in the two interfacial surfaces should be established in a complemental relationship in a manner to attain uniform aligment of liquid crystal molecules and hence to reduce free energy due to the liquid crystal molecules, therefore, non-uniformity of display is alleviated.
摘要:
A liquid crystal composition contains a compound of the formula: ##STR1## wherein R and R' are straight chain alkyl groups each having 1 to 7 carbon atoms.
摘要:
In a multi-layer matrix type liquid crystal display panel having a stack of liquid crystal display cells and matrix electrodes provided for respective ones of the liquid crystal display cells, the supports of the respective liquid crystal display cells are piled sequentially, one on top of the other, with a first dimension sequentially longer and a second dimension sequentially shorter, thereby allowing enough room on all sides for electrode connections. A rigid circuit board has terminals which are located in a complementary fashion with respect to the terminals of the display panel. The opposing terminals of the display panel and the circuit board are connected through a flexible sheet.