LIQUID CRYSTAL SCREEN AND METHOD OF MANUFACTURE Russian patent published in 1994 - IPC

FIELD: electro-optics. SUBSTANCE: reflecting covering is made in liquid crystal screen onto internal side of the second insulating plate, which has to be a plate made of aluminum or aluminum alloy, covered with porous aluminum oxide in form of a profiled surface, former onto the film made of porous aluminum oxide, covered with a layer of metal, which has high reflectivity. This material has simultaneously to be the material for parallel strip electrodes. Dichroid dye film is applied onto the film of metal. Dye film acts as passivating, orienting and polarizing covers. Space between the plates is controlled by protrusions of definite height and shape, which are formed in the film of porous aluminum either. Reflecting coating is formed by means of etching of pores of aluminum oxide to produce profiled surface, then high-reflectivity metal layer is deposited, which is used for forming conducting strip electrodes with peripheral contact areas after photolithography process is finished. Protrusions with definite height and shape, which are used for controlling space between the plates, are formed together with profiled surface when power are etched according to contours of the protrusions. Orienting, passivating and polarizing coverings are formed at the same time by means of application of dichroid dye onto structure being formed. The dye is treated to produce oriented matrix of molecules of the dye. EFFECT: improved efficiency. 2 cl, 2 cl, 3 dwg