Patent ID: 11969917
Assignee: SENIC INC.
Field: Other special machines (Mechanical engineering)
Classification: CPC B | IPC B

Claim 0:
1. A silicon carbide wafer manufacturing method comprising:
a bending measuring step of measuring a first edge having the greatest degree of a bending at one surface of a silicon carbide ingot having one surface, the other surface and a lateral surface connecting the one surface and the other surface;
a cutting start step of starting a cutting at a second edge 22 having a distance of r×a along an edge of the one surface from the first edge 21 in a direction parallel to or with a predetermined off angle with respect to the one surface through the wire saw 15, a cutting speed being decreased to a first cutting speed in the cutting start step;
a cutting proceeding step in which the first cutting speed is substantially constant within a variation of about ±5%; and
a finish step in which the first cutting speed is increased and the cutting of the silicon carbide ingot is completed,
wherein a supply amount (m/min) of the wire saw reaches a first supply amount in the cutting start step and subsequently is substantially constant within a variation of about ±5% before the finish step,
wherein r is a radius of the one surface, and
wherein a may be i) 1.4 rad to 1.75 rad or ii) 2.96 rad to 3.32 rad.