Answer:

SILICON

Answer	Crossword Clue
SILICON	Microchip material
SILICON	Composition of some chips
SILICON	Computer chip element

SILICON	Element used to make semiconductors
SILICON	Chip ingredient
SILICON	Steel component
SILICON	.. Valley (high-tech region)
SILICON	A chief elementary constituent of the earth's crust.
SILICON	Abundant element.
SILICON	Element.
SILICON	Nonmetallic element.

SILICON	Common element
SILICON	Element used in transistors
SILICON	Microchip element
SILICON	Calif.'s ... Valley
SILICON	.... Valley
SILICON	Element twisted in coils (7)
SILICON	... Valley
SILICON	More than a quarter of the earth's crust

SILICON	More than a quarter of the earth's crust, by mass
SILICON	Element in chips
SILICON	Computer chip material
SILICON	High-tech valley
SILICON	Chip material
SILICON	Element of some chips