Silicon Quest International

Headquartered in the heart of the Silicon Valley, SQI is a provider of technology solutions in the form of substrates, high-tech materials, and world-class value-added services. SQI is a success partner to a variety of industries, enabling and conveying not only products and services, but also access and expertise in a vast and dynamic marketplace.


SQI is a Worldwide Enterprise

With a presence that spans three continents, SQI company headquarters is located in the heart of Silicon Valley. We also have locations in Europe and Asia.

SQI’s product line includes prime and test CZ and FZ silicon wafers, mechanical and optical grade sapphire wafers, specialty ingots, epitaxial and epi-ready wafers, and many other materials.

Read More…

SQI offers a wide array of value-added services, including epitaxy, thinning, polishing, cleaning, sorting, and thin films.

Read More…

SQI delivers the finest products and services in the world through a number of strategic relationships with top worldwide vendors.

Read More…


800-959-3556 Toll Free