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:
May. 17, 2016
Filed:
Mar. 15, 2013
Jonathan H. Harris, Scottsdale, AZ (US);
Frank J. Polese, San Diego, CA (US);
Robert J. Tesch, Phoenix, AZ (US);
Stephen P. Nootens, San Diego, CA (US);
Sorin Dinescu, San Diego, CA (US);
William L. Bradbury, San Diego, CA (US);
Casey C. Clausen, Portland, CA (US);
Jonathan H. Harris, Scottsdale, AZ (US);
Frank J. Polese, San Diego, CA (US);
Robert J. Tesch, Phoenix, AZ (US);
Stephen P. Nootens, San Diego, CA (US);
Sorin Dinescu, San Diego, CA (US);
William L. Bradbury, San Diego, CA (US);
Casey C. Clausen, Portland, CA (US);
Oasis Materials Corporation, Poway, CA (US);
Abstract
A monolithic, substantially hermetic joining or bonding of two or more aluminum nitride ('AlN') ceramic components is made by promoting transient liquid phase sintering near the contact areas between the components. In a first approach, AlN particles are combined with a rare earth oxide sintering additive such as yttrium oxide (YO) in a joining paste can be applied between the joining surfaces of fired ceramic preformed components prior to final firing to weld the components together. In a second approach, the additive is added to green mixture, and the components having different shrinkage aspect ratios are mated and cofired in an atmosphere containing a partial pressure of the additive. The additive encourages wetting and diffusion of the liquid phases present on the surfaces of ceramic interface particles in the contact areas during final firing.