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thick cover glass
May 16, 2018

lass,


Almost everywhere we use building materials.


In your imagination,


How thin can the glass be?


The answer is 0.12 mm!


 



▲ Workers show the thinnest glass in the world

Recently, a good news came from the China Building Materials Glass Research Institute. The 0.12mm ultra-thin electronic touch glass of Yizhong Building Materials Information Display Co., Ltd. was successfully offline. After 0.15mm, it once again created the world's largest industrial production of float technology. Thin glass record.


A thin glass highlights the industry


Ultra-thin glass is also called ultra-thin electronic touch glass. It is the core material of the electronic information display industry and is used as basic materials for mobile phones, computers, and television displays. The thinner the glass, the better the light transmission performance, the better the flexibility and the lighter weight. However, glass is too thin and very fragile. How to make glass thin and have sufficient strength and toughness is a world problem.


 



▲0.12mm float glass


“Generally speaking, 0.1-1.1 mm thick glass is called ultra-thin glass, and liquid crystal displays in the electronic information industry generally use 0.55-1.1 mm float-type ultra-thin glass. The newly developed 0.12-mm ultra-thin glass is as thin as a flap, and is not only transparent. The light rate is high, and the toughness is good. It won't be broken when it is bent into a ring shape.” Peng Shou, president of the enamel glass institute, told reporters that ultra-thin glass is a key core material for the electronic information display industry and is widely used in smart cities. , defense technology and other fields. The R&D process requires highly complex integration of multiple disciplines and fields, complex process technology, and difficult production. The core technology has been monopolized by a few companies in the United States and Japan for a long time, resulting in a serious lack of key links in China's optoelectronic display industry chain and long-term industrial development. Subjected to people, the price of the product remains high year after year. To break the monopoly, the development of ultra-thin information display glass has become a major strategic demand for the development of the national optoelectronic display industry.


“Although it is a thin glass, it was completely dependent on imports a few years ago,” Li Zhiming, deputy party secretary of the Lime Glass Research Institute, told the Science and Technology Daily reporter. Many years ago, mobile phones, computers, and televisions were very expensive. Now the prices are relatively cheaper. A large part of the reason is that display glass is no longer dependent on imports and costs are reduced. "The glass of a display screen can account for 40% of the total product cost, so the technical innovation of glass has promoted the decline of the entire product cost. Consumers can now buy high-quality electronic products with less money." Li Zhiming said.


Make glass as thin as paper


Since 2013, Sui Zhongxian has been relying on the technical support of the Glass Institute and has been working hard on ultra-thin glass. Within a short period of 10 months, it successfully completed the successful production of a full range of 0.3mm to 1.1mm ultra-thin float glass electronic glass. A new record for the production line speed of similar ultra-thin float glass electronic glass production line at home and abroad. Since then, in 2014, 2015, 2016, and 2018, almost one step per year, from 0.3mm to 0.2mm, to 0.15mm, to the current 0.12mm, the ultra-thin float glass created by itself has been continuously broken. The thinnest record.



 

The thickness of the glass dropped from 0.3mm a few years ago to 0.12mm now, and it feels as thin as a piece of paper. For this reason, researchers from the Institute of Glass have made great efforts. “Each time, the 0.1mm drop seems to be subtle, but the increase in production difficulty is beyond imagination. The melting process, molding process, cutting process, inspection and packaging and equipment technology for the entire process require continuous research and breakthroughs in more than 1,000 technologies. Bottleneck." Peng Shou said.


"To make glass thin, we have to face at least a few difficulties. First, how to solve the problem of glass thinning; second, to solve the micro-defect problem, that is, there is no bubble, and third is to solve the melting furnace, tin tank, and annealing furnace. The problems of the design and manufacture of the three major thermal equipments are solved by the problem of glass formulation, and also solved a series of problems such as the cutting and conveying of the cold end of the glass and the on-line detection of defects, etc. We broke through these problems and achieved Today's results." Peng Shou told reporters.


Chinese super thin glass from chasing to lead


At the end of the 1950s, the British company Pilkington Glass announced to the world that the glass float forming process was successfully developed and that countries were scrambling to snap up patents, but Pilkington was alone in the technical blockade against China. This situation made the Chinese glass industry at the time aware that it must take a path of independent innovation.



 

The world's thinnest 0.12mm ultra-thin touch glass, 1.5mm ultra-thin high-permeability photovoltaic glass, China's first 0.2mm ultra-thin TFT liquid crystal glass...... The enamel glass research institute has solved and solved many problems such as micro-corrugation and warpage control. To completely change the situation of imported ultra-thin glass of 0.5mm and below required for touch display in China. And opened a complete industrial chain, formed a complete independent intellectual property rights.

Today, the Glass Research Institute has used this technology to build more than 20 ultra-thin information glass production lines. The products have been applied in batches by more than 20 mainstream panel companies in China, reducing the cost for the downstream industries by approximately RMB 86 billion, and ensuring the national electronic information display. Industrial security.


"Originally, BOE's glass and equipment need to be imported. Now both of these items can be provided by us. After we made the 4.5th and 6th generation lines in Chengdu, BOE provided 90% of the goods in Chengdu. Peng Shou stated that it was precisely because of the breakthroughs and innovations in Chinese technology that the international market price of ultra-thin glass was reduced by 2/3. In recent years, hundreds of display panel production lines have been introduced in China. In the past, ultra-thin glass substrates were imported from the United States and Japan for processing. If we fight the trade war, all of our hundreds of production lines are in danger.


“But we are not afraid now, because we are not only international leader in ultra-thin glass technology, but also internationally leading in manufacturing capacity, and the production cost and unit energy consumption are all lower than international similar products, and they are very competitive.” Li Zhiming told reporters Information display glass, cover glass, touch glass, and TFT glass have been made. In the future, an extension of the display glass industry chain will be made around silicon materials to promote the technological innovation and industrialization capabilities of the Chinese glass industry. Lead the leap.


"As one of the important 13th five-year projects of the country, the Institute of Glass Technology is leading the research and development of glass substrate technology and equipment of the senior generation line. Now the 8.5-generation line has started. If it goes well, it is expected to be in the end of 2018 and early 2019. The production of 8.5 generation TFT glass substrates with independent intellectual property rights will completely break foreign ridges.” Peng Shou stated that 0.1 mm ultrathin glass has been developed.


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