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:
Mar. 16, 1976
Filed:
Nov. 21, 1973
Royce Gene Schierding, St. Charles, MO (US);
John Russell Young, Jr, Florissant, MO (US);
David Louis Vadnais, St. Charles, MO (US);
Monsanto Company, St. Louis, MO (US);
Abstract
A seed holder for holding a seed crystal of gallium arsenide (GaAs) is fitted into one end of a cylindrical quartz boat in which a melt of gallium (Ga) and arsenic (As) is synthesized and then grown as a single crystal seeded by the seed crystal using the Bridgeman process or the gradient freeze process. The seed holder closely encompasses three sides of a crystal (e.g., of rectangular cross section) while exposing only the end upon which the crystal growth is to take place. The exposed end of the crystal seed is disposed above the bottom of the boat to prevent contact between the gallium melt and the seed until synthesis is nearly complete.