LONDON Following the announcement that On Semiconductor Corp. (Phoenix, Ariz.) plans to buy AMIS Holdings Inc. (Pocatello, Idaho), which trades as AMI Semiconductor, the fate of AMI's wafer fab in Oudenaarde, Belgium, has come under consideration.
AMI's Fab 2 in Oudenaarde is listed on the company's website as running 0.35-micron mixed-signal processes on 6-inch diameter wafers at a rate of 100,000 wafers per year.
On Semi has proposed a deal to acquire AMIS for about $915 million. The transaction is expected to result in cost savings from economies of scale, which could indicate cuts or sell offs to come after the acquisition. The proposal has been approved by both boards of directors.
At the time of the announcement of the proposed deal Christine King, chief executive officer of AMIS, spoke of the opportunity of combining the design talent of AMIS with the manufacturing capability of On Semiconductor. In addition, On Semiconductor acquired a 200-mm wafer fab in Gresham, Oregon, from what was then LSI Logic Corp. (now LSI Corp.) in 2006 for about $105 million.
A spokeswoman for AMIS said: "At this time, both companies are still working to determine the needs of the company after the acquisition. There have not been any decisions made regarding fabs or other business operations at this time."
According to AMIS' web site the Fab2 makes I2T and I3T mixed-signal technology on 0.35-micron processes. The company announced recently that the follow-on I4T process development would take place at IMEC's facilities in Leuven, Belgium, utilizing 130-nm and 90-nm processes on 200-mm diameter wafers rather than at Oudenaarde (see Jan. 28 story).
Collaboration between IMEC and the Oudenaarde site goes back to the early 1980s. IC manufacturing at Oudenaarde was backed by the Flemish government in the 1980s in the form of Mietec NV at the same time that IMEC was being started, also with government support, as an independent research organization.
Alcatel-Mietec was sold to STMicroelectronics NV, which retained much of the digital design capability and sold on the high-voltage and mixed-signal capability to AMIS.
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