TFT-LCD glass substrate manufacturing process

The glass substrate manufacturing process, the main techniques include feed back-sheet forming and processing of three parts, wherein the feed formulation technology mainly in the quality control, Graphic LCD Display the first glass in the high temperature furnace will be a low viscosity material melting and uniform molten glass, not only to consider the physical and chemical properties of the glass, and the need not change the chemical composition of the condition, select the best formulation of raw materials, in order to effectively decrease the glass melting temperature, the glass clear, and to achieve specific properties of glass, meet the needs of practical application. The sheet molding technology is relevant to dimensional accuracy, surface properties, and the need for further processing of grinding to achieve specific physical and chemical characteristics required rear section contains the glass partition processing, grinding, washing and heat treatment processes.

So far, the production of flat panel display glass substrate, there are three principal process technology, namely float method (FloatTechnology), orifice down-draw method (SlotDownDraw) and overflow melt method (OverflowFusionTechnology). "Float method" because of the relationship between the Department level extension, lcd module the surface will have scars and uneven, need to re-grinding the surface, so the amount of investment is higher, provided that the glass has to produce a wider product (width up to 2.5 meters) and larger capacity (approximately 100,000 sqm / month) of the advantages; "overflow melting" There is better able to control the surface properties without grinding process is relatively simple, etc., especially for production system thickness is less than 2mm ultra- thin flat glass, but the production is limited by the glass under 1.5 meters wide, capacity and therefore small. Float method can be applied to the production of a variety of flat panel displays using glass substrates, and the overflow fusion method is applied only to the current production of TFT-LCD glass substrate