- Feb 11, 2018 -
First, the etching of ITO patterns: (ITO glass input to the inspection completed)
1, ITO glass input: According to product requirements, select the appropriate ITO glass into the delivery basket, requiring the specification of ITO glass models meet the product requirements, bearing in mind the ITO level must be inserted into the basket.
2, Cleaning and Drying of Glass: The ITO glass will be washed with detergent and deionized water (DI water), and the impurities and oil on ITO surface will be washed by physical or chemical methods, then the water will be removed and dried to ensure Under the process of processing quality.
3, coated with photoresist: ITO glass conductive layer evenly coated with a layer of photoresist, coated with photoresist glass to be pretreated at a certain temperature.
4, before baking: at a certain temperature, the photoresist-coated glass is baked for a period of time to volatilize the solvent in the photoresist to increase the adhesion with the glass surface.
5. Exposure: The surface of the photoresist is irradiated with UV by a preformed electrode pattern mask so as to make the photoresist layer react. The photoresist-coated glass is covered with a photolithographic reticle in a UV lamp The photoresist is selectively exposed.
6. Developing: The surface of the glass is treated with a developing solution to remove the photo-decomposable photoresist layer, and the unexposed part of the photoresist layer is reserved. The photoresist exposed to UV light is chemically dissolved in the developing solution , After development of the glass to go through a certain temperature of the hardening film processing.
7, hard film: the glass after a high temperature treatment, the photoresist more solid.
8, etching: with a suitable acid etching solution without etching the ITO film etching away, so get the required ITO electrode pattern.
9, to the film: With a high concentration of lye (NaOH solution) for the stripping solution, the remaining glass photoresist stripped off, so that the ITO glass and photolithography mask exactly the same form of ITO patterns.
10, cleaning and drying: Rinse the remaining lye and residual photoresist and other impurities with high purity water.
Second, the special process: (TOP film coating after curing to clean)
General TN and STN products do not require this step, TOP film coating process is to do a SiO2 coating after the lithography process, in order to fill the trench between the etched area and non-etched area and The electrode coverage, which can not only play an insulating layer, but also effectively eliminate the non-display electrode under the shadow, but also help to improve the viewing angle characteristics, etc., so most of the high-grade products require top coating cloth.
- Orientation coating (coating the alignment agent to the cleaning is completed, this step is the process of coating the ITO glass surface is coated with an alignment layer, and the limited layer with a specific method of processing so that the liquid crystal molecules can be aligned on the surface of the layer along Specific orientation (alignment), this step is a unique technology for the production of liquid crystal displays.
1, the coating to the agent: the organic polymer orientation material coated on the glass surface, that is, the use of selective coating method, the appropriate position in ITO glass coated with a uniform alignment layer, while curing the orientation layer.
2, curing: the orientation layer curing by high temperature treatment.
3, the orientation of friction: with velvet material in a specific direction of the surface of the alignment layer rubbing, so that the liquid crystal molecules in the future can be aligned along the rubbing direction of the alignment layer.
4, cleaning: Oriented rubbing glass will leave velvet and other contaminants, need to take special cleaning steps to eliminate contaminants.
Third, the empty box production: (screen printing to curing) <BR> </ STRONG> <BR> This step is the process of stacking two pieces of conductive glass, the use of sealing materials and curing together, made of gap-specific Thickness of the glass box. Cartridge technology is one of the most crucial technologies for making LCD displays.
1, silk screen border and silver point: the sealing material (sealant) with screen printing method respectively on the board printed on the border glue and the lower plate glass printing is conductive plastic.
2, spray lining material: uniform distribution of the supporting material in the next glass. A certain size of lining material (usually a few microns) evenly dispersed in the glass surface, when the box * these materials to ensure that the spacing between the glass box thickness.
3, the pressure on the registration: Press the registration mark on the glass and the next bit of bonding, the corresponding two glass face to face with the sealing material bonded together.
4, curing: the sealing material at high temperature curing. Curing generally add a certain amount of pressure on the upper and lower glass, so that the cell spacing (thickness to maintain uniform).