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:
Oct. 27, 1998
Filed:
Aug. 29, 1996
Applicant:
Inventors:
Paul E Colombo, White Bear Lake, MN (US);
Robert F Donadio, Hudson, NH (US);
Assignee:
Chorus Corporation, White Bear Lake, MN (US);
Primary Examiner:
Int. Cl.
CPC ...
C23C / ; F27B / ;
U.S. Cl.
CPC ...
118726 ; 428 344 ; 432156 ; 432157 ; 432262 ; 432265 ; 392389 ; 219420 ; 219421 ;
Abstract
A unibody, monolithic, one-piece negative draft crucible for an MBE effusion source. The crucible maximizes capacity, uniformity and long term flux stability, and minimizes oval defects, depletion effects, and short term shutter-related flux transients. The invention also includes an effusion source employing such a crucible, as well as a method and mandrel apparatus for making a unibody containment structure, such as a crucible formed of PBN, having a negative draft, via chemical vapor deposition.