Taiwanese chipmaker GlobalWafers is preparing for the second phase of expansion at it chip fab in Sherman, Texas.

In comments made by chairperson Doris Hsu and reported by Reuters, the decision resulted from conversations with multiple customers who told the company they would like capacity at the site to increase.

"Regarding additional investment [in the US], we have started to be asked by customers," said Hsu. "We think phase one may not be enough, because phase one does not serve just one customer but multiple customers, and each of them has mentioned that they would like capacity to increase."

GlobalWafers opened its $3.5 billion chip fab in Sherman in May 2025, at which time the chipmaker announced plans to invest an additional $4 billion in the US.

The 142-acre campus in Texas can accommodate up to six phases and, while no timeline has been outlined, in May, the company said plans to add two additional phases to the fab were already under way. In comments made following the fab’s opening, GlobalWafers said Phase I was already complete, while Phase II was still in the planning stage.

Hsu had previously said that for the company to move forward with further capacity increases, Phase I and II “must be profitable.”

In total, GlobalWafers has facilities in nine countries, including a second fab in St. Peter’s, Missouri. At both its US sites, the company produces 300-mm wafers and silicon-on-insulator wafers.

The company is also planning to convert its existing silicon epitaxy wafer manufacturing facility in Sherman into a silicon carbide (SiC) epitaxy wafer manufacturing site, producing 150mm and 200mm SiC epitaxy wafers.