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touch screen cover glass
May 11, 2018

"This is another fruit created by China Building Materials Glass Industry Design and Research Institute following the world's thinnest 0.15 mm ultra-thin touch glass and the world's highest photoelectric conversion rate of copper indium gallium selenide power generation glass, marking the design and research institute of the Glass Glass Industry. Once again, it fills the domestic gap and breaks the foreign monopoly, and moves toward the high end of the industrial chain and the value chain,” said Peng Shou, dean of the China National Building Materials Glass Industry Design Institute, at the off-line ceremony.


Forced to monopolize the import of high aluminum cover glass


The replacement of mobile phones is very fast. The original Motorola "big brick" has become history, and the "thin" thin smartphone has become a fashion trend. Therefore, smart phones can continue to thin, and ultimately, the contribution of cover glass.


The cover glass, as the outermost protective layer of the screen of the electronic touch product, is an integral part of the touch solution. Since the cover glass is in direct contact with the outside world, the properties such as hardness, strength, and toughness determine the quality of the cover. High and low. If the mobile phone is to be "thin", the cover glass will have to be thinner, but the hardness and strength will be reduced. Want to pursue "thin" and "strong", which puts higher requirements on the cover glass material and production process.


How to make "brittle" glass hard, high strength, and improve the toughness and damage resistance, greatly increase the alumina content in common soda-lime glass, and can be compared after a good melt molding With good results, high aluminum cover glass is widely used as a preferred protective material for touch screens and handwriting screens of electronic display products. However, the increase of alumina content in glass has greatly increased the difficulty of glass melting and forming. Due to late start-up, high technical barriers, and large investment, the domestic high-alumina cover glass market is almost monopolized by foreign companies. Security and long-term development have been severely constrained.


Dare to break through the thin line of ultra-thin high aluminum cover glass


In order to overcome this technical problem, on March 31, 2017, China National Building Materials (Shenzhen) Optoelectronic Materials Co., Ltd., a subsidiary of the China Glass Industry Design and Research Institute, invested 800 million yuan, using brilliance research and development and owning independent intellectual property rights. Thin-substrate float process technology, built into the touch screen with ultra-thin high aluminum cover glass production line in the formal ignition.


At present, the content of glass aluminum in the domestic market is basically below 1.5%. If the content can reach more than 15%, the glass has high light transmittance and excellent mechanical properties. “The higher the aluminum content, the higher the hardness and the strength of the glass, and the stronger the abrasion resistance, the better the protection of the mobile phone and other terminal display screens can be realized.” CNPC (Chongqing) Photoelectric Materials Co., Ltd. The melting furnace has been upgraded and upgraded to achieve "high aluminum" and melting, but it is extremely difficult to achieve "ultra-thin" drawing. "Each thin 0.1mm, the difficulty of stretching will increase exponentially, a little bit of testing our technology and patience."


Relying on the strong R&D strength and technical team of the Glass Research Institute, China Building Materials (Shenzhen) Optoelectronic Materials Co., Ltd. adopts the float process, and the experiments over and over again, from 0.7mm to 0.4mm and then to 0.3mm, continue to be “thin”. Make a fuss.


The official off-line production of ultra-thin high-aluminum cover glass is another breakthrough for the glass-lined industry, which fills the domestic gap. Due to the lower cost of domestic production of this product, it also stimulated the downward adjustment of the import price of similar foreign products. The localization of high-end cover glass also enhances the right of discourse in the international market for glass cover products, which has a positive effect on improving China's optoelectronic display industry chain and promoting the healthy development of China's optoelectronic display industry.


Courage to innovate China's first high-end cover glass production line with completely independent intellectual property rights


Into the ultra-thin high-aluminum cover glass production workshop, the reporter saw the tall and spacious plant spacious, modern equipment patchwork, a piece of large glass was transmitted over the segment, after the downstream processing and cutting, it becomes the most mobile phone Layer cover.


This production line adopts independent research and development by the Glass Design Institute and has complete sets of core intellectual property rights technology, creating the first high-end cover glass demonstration production line with independent intellectual property rights and world-class standards. At present, the production line can annually produce 0.3-1.1mm full range of electronic ultra-thin cover glass, mainly used in touch screen fields such as smart phones, tablet computers, and touch-sensitive machines. The product quality has significantly improved compared with the float glass production line currently operating in China, and has strong market competitiveness and competitive advantage.


In recent years, China National Building Materials Group has invested more than RMB 20 billion in Ningbo, and has opened up the information display glass and new energy glass industry chain across the board. In particular, during the important period of “100 billion silicon bases” in Anhui, China National Building Materials Group will continue to launch a number of major emerging industry projects, incubating a group of world leaders in innovation and creating a number of national innovation platforms.


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