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:
Sep. 27, 1983
Filed:
May. 03, 1982
Applicant:
Inventors:
William W Chow, Tucson, AZ (US);
Eugene B Rigby, Tucson, AZ (US);
Assignee:
International Business Machines Corp., Armonk, NY (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
C03B / ; C04B / ;
U.S. Cl.
CPC ...
156 89 ; 29603 ; 360126 ;
Abstract
Diffusion bonding of dissimilar ceramics can be accomplished by the application of pressure only while the ceramics are at a temperature at which their expansion rates are the same. A process for manufacturing magnetic head cores is disclosed where a magnetic ferrite is diffusion bonded to a non-magnetic ceramic by heating the core pieces to the expansion rate crossover temperature and then applying the diffusion bonding pressure. The pressure is removed either before or after the bonded pieces are cooled.