SUMCO Phoenix Corporation manufactures electronic-grade silicon wafers for the semiconductor industry. Our wafers are used by companies all over the world to make integrated circuits and semiconductor devices that power a myriad of electronic products, from computers to cell phones, digital watches to automobile engine systems.

With proprietary technologies pioneered in Japan and here in the U.S., SUMCO is able to meet and exceed customers' expectations, even as their need for sub-micron-level surface flatness and hyper-clean surfaces increases.

SUMCO employs about 500 people at two manufacturing facilities in the United States. As a supplier to some of the giants in the electronics industry, SUMCO provides a full range of products and services to support our customers' global operations and technology needs. These services include Research & Development on new technologies and product applications, worldwide inventory and product delivery management for customers, and an Internet-based customer information system that gives customers access to status reports and detailed technical information about their orders at any time, from anywhere in the world.

SUMCO is committed to being the preeminent silicon wafer supplier to the leaders of the global semiconductor industry. That's why we have invested the time and energy to implement ISO/TS 16949, ISO 14001 and QS 9000 management systems at all of our facilities, to ensure that we produce the highest quality wafers possible with minimum environmental impact.

Guiding Principles


  • We strive for excellence in every aspect of our business - products and services, client relationships, employee teamwork and corporate performance.
  • We focus on continuous improvement. We are always looking for better ways to do things, and we rely on our employees to help identify improvements.
  • We are committed to maintaining a healthy, safe and clean environment for our employees, and we have programs in place to assure this.
  • We believe in good corporate citizenship. Globally, that means treating our customers with respect and operating with honesty and integrity. Locally, it also means protecting and enhancing the environment and communities in which we work and live. We do this through responsible environmental management programs, volunteerism, and corporate and employee contributions to organizations that enrich our communities.

SUMCO is an international leader in the production of ultra-pure, defect-free, single crystal silicon wafers for the global semiconductor industry.


SUMCO is your source for prime and epitaxial silicon wafers, ranging from 100 to 300mm and for virtually any application, including DRAM, FLASH, ASIC, microprocessor, analog and discrete devices. We offer a full range of advanced silicon technologies, such as hydrogen-annealed, argon-annealed, bonded SOI (silicon-on-insulator), SIMOX (Separation by Implanted Oxygen) and heavily-doped, low-resistivity wafers. Through SUMCO, customers can access wafers manufactured in any of SUMCO's 12 facilities around the world.

With integrated research and timely technology transfer between company sites, SUMCO customers can be sure of obtaining the latest advancements in technology, process development and evaluation with the greatest efficiency. You can rely on dependable, trouble-free application of our products in your products every time.

Our orientation is to work in partnership with customers to help you achieve not only your technology objectives, but your business objectives, as well.

The modern silicon wafer is a high-performance engineered product, whether used for advanced microprocessors, memory or power controllers. Through development partnerships, SUMCO prudently invests in technology advancement to provide customers with "best-in-class" silicon wafer products. We are constantly developing and implementing new production techniques, designed to meet our customers' anticipated future standards.

SUMCO customers have access to a broad menu of technologies for all wafer diameters, as well as technology bridges to transition to tighter geometries (110 and 90 nanometer) and larger diameters (from 200 to 300mm).
Bridging to 300mm production
SUMCO initially was formed several years ago as a joint venture between the Sumitomo and Mitsubishi silicon divisions. Its sole purpose was to build integrated production capabilities for next-generation, 300mm silicon wafers. By leveraging its combined strengths and the best solutions from both companies, SUMCO is now making production volumes of 300mm wafers.

To address the issue of transitioning from 200 mm to 300mm, SUMCO offers a variety of bridge technologies such as:

P/P+ epi and P/P++ epi for microprocessor fabrication
P/P- epi for microcontroller, RAM and DSP fabrication
High-resistivity polished wafer for fabrication of "blue tooth" and ASIC devic
Other advanced technologies

SUMCO offers unique capabilities in technology specialization, designed to help semiconductor manufacturers improve device performance and increase their yields.

Using advanced crystal-growing techniques, we manufacture very low resistivity wafers in sizes up to 200mm for high efficiency power management applications, such as mobile communications or computers, discrete parts and power management circuits. SUMCO's Technology Center is advancing the state-of-the-art of heavily-doped crystal growing, both p-type and n-type, to support epi wafer products.

As semiconductor applications get more sophisticated, tailoring bulk material properties becomes increasingly critical to device performance and yield. We are helping our customers achieve improved bulk materials performance by engineering bulk micro defects in polished wafers and epitaxial wafer substrate. iGem™ 

Many customers are finding silicon-on-insulator (SOI) to be the best solution for high-speed, low-power applications. SOI offers the opportunity for fewer process steps and smaller chip size, allowing customers to extend the use of previous-generation factory equipment while achieving necessary yields. Other advanced products include hydrogen-annealed and argon-annealed wafers for specialty applications.
SUMCO manufactures a wide range of epitaxial wafer products for CMOS and power discrete applications.

Our polished wafer capabilities are state-of-the-art, with geometries of 110 or 90 nm.