Notice Regarding Head Office Telephone Number Changes (November 19, 2018)

Shin-Etsu Quartz Products Co., Ltd changes two telephone numbers at its head office as shown in the information below.

Functional Materials Division
Products Handled Quartz Glass Crucibles, Quartz Glass for Fiber Optics, Quarts Glass for Lamps,
and Quartz Glass for Optics
New Telephone Number +81-3-3348-1916
Office of the President
Types of Business Handled Purchasing, Import and Export Related Affairs, Information Systems,
Environmental Control & Safety, and Patent Related Affairs
New Telephone Number +81-3-3348-1914

The telephone numbers will be changed on Monday, December 10, 2018.

In addition, the telephone numbers of the two organizational units below as well as the fax number shared by all the organizational units will not be changed.

Base Materials & Fabrication Division
Products Handled Quartz glass products and materials for quartz glass products used in the semiconductor manufacturing process, various types of quartz glass parts, etc.
Telephone Number +81-3-3348-1913
General Affairs Department (main number)
Telephone Number +81-3-3348-1912

Fax number for all organizational units: +81-3-3348-4919

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