I found this article of interest titled .
"Solarworld builds USA's largest solar cell factory "

http://www.eetimes.com/news/semi/showArticle.jhtml?articleID=197700416
http://www.eetimes.com/news/semi/showArticle.jhtml?articleID=197700416&printable...

Here are some excerpts..

"With the production of monocrystaline silicon wafers for solar cells,
German renewable energy company Solarworld AG intends to widen its
product spectrum. The devices will be produced in what Solarworld
claims to be the USA's largest solar cell factory in Hillsborough,
Orgeon."

Finally... Someone's ramping up US based solar cell production.

Notice that it's not any of existing US energy companies who are
undertaking this endeavor ! I suspect that they're more interested
in maintaining the status quo and eventually killing off the planet's
biosphere by producing ever increasing amounts of CO2 based energy
products.