Patent ID: 11932964
Assignee: TOKUYAMA CORPORATION
Field: Surface technology, coating (Chemistry)
Classification: CPC C | IPC C

Claim 0:
1. A polycrystalline silicon material for producing a p-type silicon single crystal, comprising:
a plurality of polycrystalline silicon chunks, wherein
a total concentration of donor elements present inside a bulk body of the polycrystalline silicon material is Cd1 [ppta],
a total concentration of acceptor elements present inside the bulk body of the polycrystalline silicon material is Ca1 [ppta],
a total concentration of the donor elements present on a surface of the polycrystalline silicon material is Cd2 [ppta], and
a total concentration of the acceptor elements present on the surface of the polycrystalline silicon material is Ca2 [ppta],

wherein Cd1, Ca1, Cd2, and Ca2 satisfy a relation of 5 [ppta]≤(Ca1+Ca2)−(Cd1+Cd2)≤26 [ppta].