摘要:
A method of manufacturing a color filter for a reflective liquid crystal display is disclosed. The method comprises the following steps: 1) coating a layer of positive photoresist on a reflective layer or reflective substrate, and exposing the photoresist layer to a light via a mask having a fine pixel pattern so as to form at least three exposed regions of different exposed energy in the photoresist layer, 2) Removing one of the existing exposed regions having a largest exposed dose by the use of an alkaline developer solution so as to expose the surface of the electrically conductive reflective substrate corresponding to the removed region; and electrodepositing a color paint on the exposed surface of the reflective substrate to form a color filter layer of one selected color, 3) repeating step 2) to remove the other exposed regions in the photoresist layer and proceeding with an electrodeposition process with another color paint until a color filter layer of all desired colors is completed. Thus, a color filter for a reflective crystal display according to the present method could obtain a uniform thickness, a better flatness, and a pattern of high fineness and have a large degree of freedom in pattern arrangement and the possibility of increased size.
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 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:
The invention discloses a liquid crystal panel which is characterized in that each color filter is compartmentalized by the black matrix and the spacers are positioned on the region confined by the black matrix and the spacer bottom connects the first conductive film. The invention also discloses a process for producing liquid crystal panel, which is characterized in that the color filters and spacers are produced by coating a four-level photoresist and by a first exposure step which is masked by a four-level photoresist; the red region, green region and blue region are produced by development and electro-deposition; and the spacers are produced by a second exposure step which is masked by a spacer reticle, a development step which emerges the first conductive film within a region confined by the black matrix, and a step of electrodeposition coating compositions on the emerged region of the first conductive film. The spacers position and sizes could be easily determined by spacer reticle and high quality display performances could be achieved.
摘要:
The invention relates to a method for manufacturing color filters utilizing a color electrodeposition coating which contains an anionic electrodeposition resin having a low acid value. Said method comprises coating a layer of positive photoresist onto a transparent electrically conductive substrate, exposing the substrate under a photomask or photomasks to form regions of different initial levels of exposure energy, exposing the entire surface of the substrate through an energy-incrementing way to, progressively, allow all regions of the substrate to achieve an energy sufficient to completely expose the photoresist on each corresponding region, developing stepwise each region with a same developer solution to cause the electrically conductive substrate of the corresponding region uncovered, electrodepositing said region with a color electrodeposition coating containing an anionic electrodeposition resin having a low acid value to finish the pixel arrangements of the desired colors and completely exposing the substrate. The low acid value anionic electrodeposition resin utilized in the invention has an acid value of 1 to 70 mg KOH/g. The method of the invention shows the advantages of having a high degree of freedom in pattern figures and a wide process window. Moreover, the manufacture color filters of large surface and the perfect yield rate of products are possible.
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 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:
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.
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.