Methods for forming a unitized crucible assembly

US11326271B2 · kind B2 · utility

Assignee

• Globalwafers Co., Ltd. · TW

Inventors

• Richard J. Phillips · Saint Peters, US
• Salvador Zepeda · Saint Peters, US
• Patrick Fredrick Boegemann, III · Saint Peters, US
• William L. Luter · Holden, US

Key dates

• Filing date: Feb 20, 2020
• Grant date: May 10, 2022
• Expiry date: Apr 13, 2040

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C04B2235/656
• WIPO field: Surface technology, coating
• WIPO sector: Chemistry

Abstract

Methods for forming a unitized crucible assembly for holding a melt of silicon for forming a silicon ingot are disclosed. In some embodiments, the methods involve a porous crucible mold having a channel network with a bottom channel, an outer sidewall channel that extends from the bottom channel, and a central weir channel that extends from the bottom channel. A slip slurry may be added to the channel network and the liquid carrier of the slip slurry may be drawn into the mold. The resulting green body may be sintered to form the crucible assembly.