The long recession only tiptoed through the 2,300-acre office park, with many start-ups here expanding their operations over the past 18 months. One prominent tenant, solar company Nanosolar Inc., began producing solar panels in March and plans to add space and more employees to its 350-person work force.

Scientific-equipment maker Stratedigm Inc. moved into a 6,000-square-foot space in Edenvale—more than double its old office size—as it revs up sales. And several biomedical start-ups that were started under one roof also upgraded to bigger offices in the park.

Edenvale shows how Silicon Valley’s start-up economy has quietly broadened beyond information technology. It now includes a growing cadre of bioscience and “clean technology” firms, presaging a more-diversified economic base and bolstering the valley’s status as the world’s innovation hotbed.

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