ITO arrangement of atoms and grain Character LCD Modules

In most occasions, the chemical etching method is the most mature and prepared ITO graphics viable technology, it can according to your needs, to generate sufficiently fine patterns and the current relatively small upfront investment. With deep UV technology in the exposure device applications, micron precision, most manufacturers have already been achieved. It has high efficiency, good stability and reproducibility batch, equipment investment is low, supporting technology improvement and many other advantages, is still the main direction of large-scale production, the use of raw materials etching cream, resist ink, photoresist three.
1, the etching cream craft
Chemical etching of the following ways: one is directly outside the area of ​​the electrode pattern of the product printed etching paste, etc. After completion of the reaction, the etching paste solvent, typically water clean, leaving the desired electrode pattern. In this way for a number of line width and line spacing requirements of 0.2mm or more photoelectric products such as low TN display, resistive touch screens, capacitive touch screens, solar batteries, because you do not spend a lot of chemical, a smaller impact on the environment pollution , save a lot of water, electricity, venue costs, low upfront investment costs, the general printing industry can master most of the technical and other factors, there is growing momentum of development. Its main point is that the temperature control for etching speed control, the design should take full account of the edge effect on these two points, generally with a relatively simple workshop field experiments, you can get ready to compare the parameters.
2, the resist ink technology
Chemical etching the second method, just the opposite with the first, which is area of ​​the electrode pattern in the printed product is protected by the resist ink, and the product immersed in a chemical etchant, so that products outside the area of ​​the electrode pattern portion and Chemical After complete reaction the etching solution, and then the resist pattern of ink from the surface of the electrode peeled product, an electrode pattern is formed product. Its width and line spacing be 0.08mm, still more than 95% yield of the etching. This approach PCB circuit boards, membrane switches, resistive touch screen, photovoltaic cells and other products, the current occupy the mainstream position.
According to the last strip to go different ways, resist ink divided into physical and chemical solution peel-peel type. Wherein the physical strippable resist ink, in addition to preparing graphics for use in the production of electronic products, and more is on the product surface protection to prevent external damage product, isolated environment outside of water, electricity, gas, preventing them from corrosion products . Among the most widely used in the electronics industry is the circuit board insulation adhesive, and the touch screen surface protection in the production of rubber. 320x240 lcd
Since the physical strippable resist ink, if the product transfer order process, the need to remove it, is the use of physical force tear strip, so generally it's screen thickness requirements in the chemical solution strippable resist printing ink to the thickness of the two more than three times, and the degree of cure, as the chemical solution is not exfoliated resist ink, as long as to reach the surface curing, also requires must be completely cured, so that the subsequent processing in the production process, the edge portion will not be squeezed pressure and deformation and fracture, the need to remove it, resulting in residual edge. In the production process of the touch screen, the edges of the surface protective adhesive residues affecting the production efficiency and quality of the yield of the main factors.
Exfoliated resist chemical solution inks, at last peeling in different ways, one is also divided into dissolving, one is expanding type. Two are in the etching effect is no different, just peel the cleaning process, dissolving the resist ink does not require alkali, alkali concentration on some of the more sensitive products more suitable, its drawback is that in order to improve the silkscreen ink performance, added some filler to increase the ink in the ink viscosity and styling capabilities, these fillers will dissolve the peeling process, due to the Coanda effect, dependent on the product surface residues, are more difficult to clean. These shortcomings of the expansion type does not appear in the ink, but the ink intumescent strip, the higher the concentration of alkali, and after peeling the ink flaky, the peeling device lye circulation system, to there is a corresponding filtering and quarantine measures to avoid blocking pipes and repeat polluting products. lcm module
Resist ink key parameter is the pinhole and viscosity, are generally produced as line width 0.08mm or more products, the general pinhole can meet the requirements, so the actual production process, the main concern is the change in viscosity .