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:
Nov. 09, 2021
Filed:
Jun. 18, 2019
Robert T. Bondokov, Watervliet, NY (US);
James R. Grandusky, Waterford, NY (US);
Jianfeng Chen, Ballston Lake, NY (US);
Shichao Wang, Troy, NY (US);
Toru Kimura, Tokyo, JP;
Thomas Miebach, Malta, NY (US);
Keisuke Yamaoka, Tokyo, JP;
Leo J. Schowalter, Latham, NY (US);
Robert T. Bondokov, Watervliet, NY (US);
James R. Grandusky, Waterford, NY (US);
Jianfeng Chen, Ballston Lake, NY (US);
Shichao Wang, Troy, NY (US);
Toru Kimura, Tokyo, JP;
Thomas Miebach, Malta, NY (US);
Keisuke Yamaoka, Tokyo, JP;
Leo J. Schowalter, Latham, NY (US);
CRYSTAL IS, INC., Green Island, NY (US);
Abstract
In various embodiments, single-crystal aluminum nitride boules and substrates are formed from the vapor phase with controlled levels of impurities such as carbon. Single-crystal aluminum nitride may be heat treated via quasi-isothermal annealing and controlled cooling to improve its ultraviolet absorption coefficient and/or Urbach energy.