West Coast Quartz - WCQ Silicon





WCQ Headquarters

1000 Corporate Way
Fremont, California 94539
Phone: (510) 249-2160
Fax: (510) 249-2168
Email: Sales@WCQ.com

WCQ Singapore

115A Commonwealth Drive
Singapore 149596
Phone: +65 6271 0638
Fax: +65 6271 1826

WCQ Japan

Stork Tower 702B
2-15-1 Yayoi-cho
Naka-ku, Yokohama-shi, Kanagawa, 231-0058
Phone: 81-45-315-4541
Fax: 81-45-315-4548

WCQ Taiwan

No. 4-2, Guangfu Rd.
Hukou Township
Hsinchu County
Taiwan 30351
Phone: 886-3-5973979







West Coast Quartz USA diversified into silicon growing many years ago at our factory in Fremont California and upon a solid foundation of equipment, infrastructure, and experience, we have built a significant silicon raw materials business into WCQ Silicon Division. Our crystal growing personnel have a combined experience approaching 100 years producing semiconductor grade silicon ingots.


We offer low resistivity, high resistivity, and medium resistivity boron doped P-type, 111 orientation and 100 orientation material.


We grow single and poly crystal in our CZ furnaces and will be expanding our capacity by 20% in 2018. Customers rely on West Coast Quartz for state-of-the-art VLD very large diameter ingots up to 580mm OD.


Our highly pure silicon makes its way into the top semiconductor manufacturing factories around the world, military and aerospace applications and onto tinted automobile windows, over flat panel displays, and into clean energy for photovoltaic solar panels.