ALEXANDRIA, Va., Feb. 19 -- United States Patent no. 12,227,871, issued on Feb. 18, was assigned to XI'AN ESWIN MATERIAL TECHNOLOGY Co. LTD. (Xi'an, China).
"Quartz crucible and crystal puller" was invented by Peng Heng (Xi'an, China).
According to the abstract* released by the U.S. Patent & Trademark Office: "A quartz crucible and a crystal puller for growing a crystal ingot are provided. The quartz crucible includes: a crucible base made of silicon dioxide material; and a coating plated on a part of an inner surface of the crucible base, the coating is configured to prevent oxygen atoms of a coated part of the crucible base from precipitating during the growing process of the crystal ingot; a plating area of the coating gradually decrea...