The relations between size matter and glass substrate of different generations
For those who have heard and wondered about the difference in generation technology, it's really quite simple. The major difference is the size of the mother glass that is used at the very beginning of the manufacturing process. From the birth of the industry in early 1990's, the Japanese creators began with generation one (G1) technology processing. The mother glass used in G1 was approximately 30cm x 40cm, equivalent to the size of an open fashion magazine and could make one 15" panel. When Acer Display Technology Inc., which subsequently merged with Unipac Optoelectronics Corp. to form AUO, entered the industry in 1996, the technology had already advanced to G3.5 with the 60cm x 72cm mother glass size. Also, the gigantic mother glass of AUO's G7.5 fab has dimensions of 195cm x 225cm . Its larger scale can cut up to eight 42" or six 47” flat panels per manufacturing process. The capacity of AUO's G7.5 line in Taichung has reached 60,000 on monthly glass substrate input since Q3 2007. AUO also plans the next G7.5 / G8.5 hybrid fab, the mother glass used in G8.5 is approximately 220 x 250 cm, equivalent to the size of a pool table, but the glass thickness is less than 1mm. Therefore, the new generation fab require higher process technology. The mother glass of AUO's G8.5 fab can be cut to six 55” or eight 46” flat panels per manufacturing process, mainly used to produce 46” and above large scale panel.
As technologies for large-sized panels become increasingly mature, AUO will continuously focus on the development of next-generation fabrication, aiming to increase capacity, manufacturing quality and offering better customer service
(*): AU Optronics Optimal Cutting Fabrication Facilities .