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:
Mar. 10, 2015
Filed:
Jul. 19, 2011
Baxter Moody, Raleigh, NC (US);
Rafael Dalmau, Raleigh, NC (US);
David Henshall, Raleigh, NC (US);
Raoul Schlesser, Raleigh, NC (US);
Baxter Moody, Raleigh, NC (US);
Rafael Dalmau, Raleigh, NC (US);
David Henshall, Raleigh, NC (US);
Raoul Schlesser, Raleigh, NC (US);
Hexatech, Inc., Morrisville, NC (US);
Abstract
Methods of preparing polycrystalline aluminum nitride materials that have high density, high purity, and favorable surface morphology are disclosed. The methods generally comprises pressing aluminum nitride powders to form a slug, sintering the slug to form a sintered, polycrystalline aluminum nitride boule, and optionally shaping the boule and/or polishing at least a portion of the boule to provide a finished substrate. The sintered, polycrystalline aluminum nitride materials beneficially are prepared without the use of any sintering aid or binder, and the formed materials exhibit excellent density, AlN purity, and surface morphology.