摘要:
Color layers of a color filter obtained by exposing a transparent substrate to light from the back side followed by development may have a defect of layer unflatness produced due to unevenness caused by contamination with foreign matters. The defect can be repaired by eliminating the defective part of the color layers to produce a blank there, optionally filling the blank with a negative photosensitive composition containing a black colorant and returning the thus modified color filter to an appropriate step in the production line. The color filter repaired is used to fablicate multi-color display devices which are by no means inferior in display qualities to those fablicated using a color filter having no defect originally.
摘要:
A method for manufacturing a color filter which includes arranging an electroconductor and a transparent substrate carrying an electroconductive transparent thin layer in an electrodeposition bath so that the electroconductor and the substrate are disposed in spaced and parallel relationship and that a baffle is disposed between the thus arranged electroconductor and the substrate, and carrying out electrodeposition in the electrodeposition bath by using the electroconductive transparent thin layer as one electrode and the electroconductor as a counter electrode permits the production of a desired color filter having superior layer flatness, even when the substrate enlarged in the size is used.
摘要:
A method for manufacturing a color filter which comprises holding an electroconductor and a tetragonal substrate having an electroconductive transparent thin layer on its surface in an electrodeposition bath in such a way that they are spaced apart and in parallel to each other, the substrate being suspended in an inclined state in a manner such that one of the apexes of the tetragonal substrate is located lower than any of its other apexes; carrying out electrodeposition in the electrodeposition bath; and removing the electrodeposited substrate from the electrodeposition bath while maintaining the inclined state; and which permits prompt removal of the bath adhering to the electrodeposited substrate to improve productivity.
摘要:
A multi-color filter without a so-called bipolar phenomenon for use of color liquid crystal display devices is prepared by such a manner that plural sets of electroconductive circuits are prepared on transparent substrate; a given set of circuits on which a first color layer is to be formed is provided with a feeder circuit traversely in one lot; and the first electrodeposition is conducted by applying a current only to this set of circuits in order to impress a given voltage while voltage is increased gradually to a given level over a certain period of time, thereby forming the first color layer, and the electrodeposition is repeated in the similar way by applying current to each of the remaining sets of circuits.
摘要:
A method for manufacturing a substrate having electrically conductive circuits on the surface of a transparent substrate, window-shaped coating films on the electrically conductive circuits and a frame-shaped, functional coating film at the regions not occupied with the window-shaped coating films, includes the steps of:(a) coating the surface of a transparent substrate with a photoresist composition to cover the circuits-carrying surface of the substrate, followed by forming a photoresist coating film,(b) superposing a photomask on the surface of the photoresist coating film formed through step (a) and exposing the thus masked photoresist coating film to light,(c) subjecting the substrate formed through steps (a) and (b) to development, and eliminating the photoresist coating film in the frame-shaped part,(d) subjecting the photoresist coating film left in step (c) to heat-treatment,(e) coating the substrate obtained through steps (a) to (d) in this order with a negative photoresist composition containing a function-imparting additive to cover the circuits-carrying surface of the substrate, followed by forming a functional coating film,(f) exposing the substrate obtained through steps (a) to (e) in this order to light emitted from the opposite side of the circuits-carrying surface of the substrate,(g) subjecting the substrate obtained through steps (a) through (f) in this order to development, and eliminating the uncured part of the functional coating film,(h) eliminating the photoresist coating film having been heat-treated in step (d), and (i) subjecting the substrate obtained through steps (a) to (h) in this order to electro-deposition using the circuits on the substrate as one electrode, and forming electro-deposition coating films at the window-shaped parts on the circuits.
摘要:
A method for supplying powder into a coating tank for electrophoretic powder coating comprises a first step for taking out a specified amount of plating bath of which the powder contained therein is reduced as a result of coating work, a second step in which the powder of much the same amount as the reduced amount of the powder is supplied to the plating bath taken out while the plating bath is being agitated to disperse the powder in the plating bath (the first dispersion) to form supplementary plating bath, a third step including the step for second dispersion of the powder in which the powder contained in the supplementary plating bath is further uniformly dispersed and a step for aging the supplementary plating bath with the dispersed powder, and a fourth step for supplying to the coating tank sufficiently aged supplementary plating bath which is obtained from the third step and has a high density of powder which is substantially uniformly dispersed in the supplementary plating bath, and an apparatus is one for executing that method.
摘要:
An electrically conductive composition for electrodeposition coating comprises (A) a pigment and at least one cationic high molecular resin and (B) electrically conductive ultra-fine particles having an average particle diameter less than 0.8 .mu., the amount of (A) being 96-50% by weight and the amount of (B) being 4-50% by weight of the total solid content of the composition.
摘要:
A method for supplying binder into a coating tank for electrophoretic power coating comprises: a step for transferring into a solid/liquid separation tank a proper amount of plating bath liquid contained in the coating tank of which the binder component is reduced as a result of the work for coating a given number of articles; a step in which the plating bath liquid is left as it is so as to form supernatant liquid and residual liquid; a step for agitating the supernatant liquid in a supernatant tank; a step for returning the residual liquid to the coating tank; a step for supplying mother binder liquid corresponding in amount to the reduced binder component to a mixing tank; a step for transferring a given amount of the liquid in the supernatant liquid tank into the mixing tank; a step in which a proper amount of plating bath liquid in the coating tank is supplied into the mixing tank while being agitated to form replenisher or supplementary bath liquid; and a step for supplying the replenisher bath liquid into the coating tank. The method is realized by an apparatus of this invention for supplying binder into a coating tank for electrophoretic powder coating.