Quality Policy

The Quality Policy of Tosoh Quartz, Inc. is to achieve world class performance. 

We are committed to supplying (to our customers throughout the world) products that precisely meet their specific and implied needs and expectations.

A Quality System complying with ISO 9001 is a key enabling part of this policy.

We believe quality is a line responsibility and our most valuable resource is our employees. Tosoh Quartz, Inc. employees receive encouragement to pursue personal development, product, and service improvement programs.

  • Tosoh Quartz, Inc. was registered to ISO 9001 in December 1993, becoming the first quartz product manufacturer in the world to receive this distinction.
  • Tosoh Quartz is periodically audited by key customers to the Standardized Supplier Quality Assessment (SSQA) criteria developed by Sematech.
  • The results of the SSQA and 3rd party ISO audits are used to drive continuous improvement, thus furthering our quest to achieve World Class Performance.

Tosoh Quartz uses Statistical Process Control to monitor its manufacturing processes so that quality is “built in” rather than “inspected in." This allows the detection of manufacturing variations or errors to take place in real-time (rather than when the product is final inspected). In addition to SPC, TQ Portland also uses various problem solving tools such as Failure, Mode and Effect Analysis (FMEA) and Design of Experiment (DOE) to determine the root cause of internal failures when they do arise.

ISO Certificates

Tosoh Quartz, Inc. (Portland) » (PDF)

Tosoh Quartz, Inc. (Durham) » (PDF)