To: Kirk © who wrote (4456 ) 11/30/2000 10:54:34 AM From: Proud_Infidel Read Replies (1) | Respond to of 5867 TSMC to Process 300mm Wafers at 50 Percent of Full Capacity in 2005 November 30, 2000 (TOKYO) -- Taiwan Semiconductor Manufacturing Co., Ltd. revealed its mass production plan for 300mm wafers. TSMC already started the production of 300mm wafers based on a 0.18-micron design rule at its Fab 6 pilot line in November 2000, and now is shipping its products to Altera Corp. in the United States. And it is going to start LSI production using a 0.15-micron design rule in February 2001 on the line. TSMC is going to start its 300mm wafer processing not only at Fab 6, but at Fab 12, Fab 14, and Fab 15, all of which are aiming for 300mm wafer process mass production in rapid succession. As a result, the weight of 300mm wafer process production ability will be raised to about 30 percent of its full capacity in 2003, to about 40 percent in 2004 and about 50 percent in 2005. Ken C. Chen, field technical support and marketing director of the Japan arm of TSMC, said TSMC's aggressive development of the 300mm wafer process lines is aimed at lowering die production costs compared with the 200mm wafer process. Chen said there are two reasons for it. One is that theoretically, more chips per unit wafer area can be obtained from 300mm wafers than from 200mm wafers. And another is the high-yield characteristic. Chen explained that the theoretical number of chips obtained from a 300mm wafer is expected to be 2.3-2.6 times than that of a 200mm wafer. He added that the larger the chip size, the more effective it is to obtain more chips: the area of a 300mm wafer is 2.25 times a 200mm wafer. Therefore, theoretically, "we can get more chips per unit area using 300mm wafers, having nothing to do with the chip size," Chen said. Chen projects that the yield of the 300mm wafer process will be better than that of 200mm wafers after the third quarter of a year period since 300mm wafer mass production was launched. This is closely related to the wafer's defect density. TSMC explains that it found, based on its experience, the particle numbers of the wafers did not have much relation to wafer size as the processes become mature and on the same design rules. So, Chen said, the larger the wafer size, the more effective it is for obtaining high-yield processing. But still, there remains one important subject in order to get lower die production costs. It's necessary to drastically reduce the wafer price itself. Chen points out that the price of 300mm wafers is as high as about 10 times that of 200mm wafers. But Chen of TSMC has an optimistic view that the 300mm wafer price will be naturally reduced in proportion to the increasing use of 300mm wafers by many LSI makers. TSMC said that the consumption of 300mm wafers by the company alone will contribute to reducing the wafer price considerably, and saying that the price of 300mm wafers is supposed to decline to about 2.5 times that of 200mm wafers in the near future, judging from the various information of the transition to 300mm wafer process by many big DRAM makers and microprocessor makers. Related stories: TSMC's 12-In. Wafer Fab Begins Pilot Production TSMC Begins Processing 300mm Client Product Wafers (Nikkei Microdevices)