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:
Feb. 19, 2019
Filed:
Jul. 29, 2015
Screen Holdings Co., Ltd., Kyoto, JP;
Taiki Hinode, Kyoto, JP;
Takashi Ota, Kyoto, JP;
Kazuhide Saito, Kyoto, JP;
Toshimitsu Namba, Kyoto, JP;
Yasukatsu Kamihiro, Kyoto, JP;
SCREEN Holdings Co., Ltd., , JP;
Abstract
A phosphoric acid aqueous solution in a production tank circulates a circulation system. The circulation system is configured to be switchable between a first state in which the phosphoric acid aqueous solution is circulated through a bypass pipe and a second state in which the phosphoric acid aqueous solution is circulated through a filter. When a silicon containing liquid is supplied to the production tank, the circulation system is switched to the first state. When silicon particles are uniformly dispersed in the phosphoric acid aqueous solution, the circulation system is switched to the second state. Alternatively, a filtration member is provided in the production tank. The silicon containing liquid is stored in the filtration member. The filtration member is dipped in the phosphoric acid aqueous solution stored in the production tank. The silicon containing liquid is permeated through the filtration member, and is mixed with the phosphoric acid aqueous solution.