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. 01, 1993
Filed:
Aug. 11, 1992
Thomas Krug, Hanau am Main, DE;
Friedrich Anderle, Hanau-1, DE;
Albert Feuerstein, Bruchkobel, DE;
Eggo Sichmann, Gelnhausen, DE;
Wolfgang Buschbeck, Hanau am Main, DE;
Leybold Aktiengesellschaft, Hanau I, DE;
Abstract
A crucible (9) of a nonmetallic material with an elongated cavity (42) to contain the material to be evaporated has on top a vapor emission slot (45) which is defined at its longitudinal edges (43, 44) by two elongated plates (40, 41) of a likewise nonmetallic material. In the cavity (42) two heating rods (46, 47) are disposed in a mirror-symmetrical relationship to a plane of symmetry (S) through the vapor emission slot (45), one under each of the plates (40, 41) defining the vapor emission slot (45). Additional heating means are provided outside of the crucible and inside of a thermal barrier system.