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Fab in Sharp's Kameyama plant features "environmental design"

Posted: 21 Sep 2006 ?? ?Print Version ?Bookmark and Share

Keywords:Sharp? Kameyama? fab? LCD? environmental design?

Sharp Corp. recently showcased its Kameyama Plant No. 2, which is an extensive facility that features the industry's first 8G fab and an experimental fab with an environmental design.

The design is intended to enable the LCD fab to operate with minimum environmental impact and reduce water and power requirements in future chip and LCD fabs, Sharp executives said.

"The new plant has brought three revolutions: high productivity, high product performance and a high-level of coexisting with the surrounding environment," said Mikio Katayama, Sharp's corporate senior executive director.

Sharp's Kameyama Plant No. 2 began operations in early August. The 8G line produces 2,160-by-2,460mm glass substrates, yielding eight 46-inch or six 52-inch panels. Initial monthly capacity is 120,000 46-inch panels.

The fab's eco-friendly design includes solar power generation systems, fuel-cell generators and cogeneration systems, together accounting for about one-third of the fab's total power requirement. Sharp estimates that it can reduce CO? emissions by about 40 percent compared to a conventional thermal power generation.

Additionally, Plant No.2 also recycles waste water. "In the process of LCD panel production, a large quantity of pure water is necessary. Plant No. 2 recycles 100 percent of the wastewater," said Katayama. The Kamayama Plant's Fab 1 currently uses about 15,300 tons of water per day, while Fab 2 uses 13,000 tons a day. Sharp recycles wastewater and purifies it for reuse.

The company has yet to reach a break-even point for wastewater recycling. LCD production at the two fabs requires a total of 28,300 tons of water a day. Despite recycling, the fab still needs an additional 6,000 tons per day from municipal water supplies.

About 80 percent of the 6,000 tons is for air conditioning. Between 100 and 200 tons is used to replenish pure water supplies used for production since so much water is lost by evaporation.

- Yoshiko Hara
EE Times

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