Rubicon Technology (RBCN) 8-K Changes in Registrant's Certifying Accountant

Exhibit 16.1

 

grant thornton llp Grant Thornton Tower 171 N. Clark St. Suite 200 Chicago, IL 60601-3370 D     +1 312 856 0200 F     +1 312 565 4719 S      linkd.in/grantthorntonus twitter.com/grantthorntonus	December 28, 2017 U.S. Securities and Exchange Commission Office of the Chief Accountant 100 F Street, NE Washington, DC 20549 Re: Rubicon Technology, Inc. File No. 001-33834 Dear Sir or Madam: We have read Item 4.01 of Form 8-K of Rubicon Technology, Inc. dated December 28, 2017, and agree with the statements concerning our Firm contained therein. Very truly yours, /s/GRANT THORNTON LLP
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