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:
Jun. 10, 2014
Filed:
Oct. 30, 2006
Yuji Morikawa, Hyogo, JP;
Kazuo Kawasaki, Hyogo, JP;
Sun-joong Hwang, Tokyo, JP;
Marc Schaepkens, Medina, OH (US);
Yuji Morikawa, Hyogo, JP;
Kazuo Kawasaki, Hyogo, JP;
Sun-joong Hwang, Tokyo, JP;
Marc Schaepkens, Medina, OH (US);
Momentive Performance Materials Inc., Waterford, NY (US);
Abstract
A unibody, multi-piece crucible for use in for use in elemental purification, compounding, and growth of semi-conductor crystals, e.g., in the process of molecular beam epitaxy (MBE) for melting silicon and the like at high temperature. The crucible has an outer coating layer that fixedly joins the multi pieces making up the crucible. The invention also provides a method for making a unibody containing structure comprising pyrolytic boron nitride having a negative draft, which method obviates the need of complicated overhang structure of graphite mandrels or the removal of the graphite mandrels by burning at high temperatures.