Method for forming mold for producing silicon ingot, method for producing substrate for solar cell element, method for producing solar cell element, and mold for producing silicon ingot

摘要

Provided are a solar cell element having excellent characteristics and a method for producing a substrate constituting the solar cell element, particularly a method for forming a mold capable of producing a silicon ingot suitable for obtaining the substrate. In this method for forming a silicon ingot production mold, a large number of silicon nitride particles having an oxide film formed on a surface thereof are formed in a state where at least a part of the large number of silicon nitride particles is aggregated by bonding of the oxide films. A slurry preparing step for preparing a slurry to be contained; an agglomeration eliminating step for eliminating the agglomerated state of the silicon nitride particles by applying an external force to the agglomerated silicon nitride particles; and the slurry that has undergone the agglomeration eliminating step And a release layer forming step of forming a release layer by adhering to the inner surface of the mold substrate.