The further delays had very little to do with the challenging process of making CIGS solar cells as this process was well in place.

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The San Jose company, founded in 2002, makes solar panels using copper-indium-gallium-selenide (CIGS) solar cells.

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Nanosolar is one of several Silicon Valley startups that have attracted billions of dollars in venture capital to develop a thin-film technology called copper indium gallium selenide, or CIGS. Such solar cells use little expensive silicon, the main ingredient of conventional photovoltaic cells.

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It has been concluded therefore that in the future less than 1% of solar pv will be in the form of CIGS thin-film cells.

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The company is installing equipment at the new factory in Portland and bringing the machines online to roll out its solar panels, which contain a thin layer of solar cells made with copper, indium, gallium and selenium (CIGS).

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