The ultra-thin laminated glass substrate
The ultra-thin laminated glass substrate
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Asahi Glass Co Ltd developed a lamination technique for attaching a 0.1mm-thick glass substrate to a carrier glass.

With the technique, it becomes possible to use the "sheet-to-sheet method," in which one piece of glass substrate is carried. As a result, ultra-thin glass substrates can be handled without changing existing manufacturing lines for, for example, displays, the company said.

The newly-developed lamination technique is for attaching a 0.1mm-thick glass substrate to a 0.5mm-thick carrier glass by using an adsorption layer. Its resistance to the heat and chemical treatments used for manufacturing displays is as high as that of a normal glass substrate.

The carrier glass can be easily removed. And the ultra-thin glass substrate combined with the carrier glass does not directly contact manufacturing equipment, preventing the glass substrate from being scratched, Asahi Glass said.

Asahi Glass developed a 0.1mm ultra-thin glass substrate in 2011, emphasizing its glass properties such as transparency, thermal resistance and electric insulation as well as its flexibility realized by the slimness. Though the use of the "roll-to-roll" method, which handles a roll of ultra-thin glass substrate in a continuous way in a manufacturing process, has been considered, it requires to drastically change existing equipment.

A sample of the laminated substrate will be exhibited at the 2012 SID International Symposium, Seminar & Exhibition (SID 2012), the world's largest academic conference on display technologies, which will take place from June 3 to 8, 2012, in Boston, the US.