The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 11, 2024
Filed:
Sep. 23, 2020
Ii-vi Delaware, Inc., Wilmington, DE (US);
Ilya Zwieback, Township Of Washington, NJ (US);
Varatharajan Rengarajan, Flanders, NJ (US);
Andrew E. Souzis, Ramsey, NJ (US);
Gary E. Ruland, Morris Plains, NJ (US);
II-VI ADVANCED MATERIALS, LLC, Pine Brook, NJ (US);
Abstract
The present disclosure generally relates to silicon carbide crystals which may be used in optical applications, and to methods for producing the same. In one form, a composition includes an aluminum doped silicon carbide crystal having residual nitrogen and boron impurities. The concentration of aluminum in the silicon carbide crystal is greater than the combined concentrations of nitrogen and boron in the silicon carbide crystal, and the silicon carbide crystal includes an optical absorption coefficient of less than about 0.4 cmat a wavelength in a range between about 400 nm to about 800 nm.