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

Claim 6:
7. A system for manufacturing a silicon carbide wafer comprising:
a bending measuring unit measuring a first edge having a greatest degree of being in on surface of a silicon carbide ingot comprising the one surface, the other surface and a lateral surface connecting the one surface and the other surface;
a control unit designating a second edge having a distance of rxa along an edge of the one surface of the first edge of the one surface of the silicon carbide ingot measured by the bending measuring unit; and
a cutting unit cutting the silicon carbide ingot in a direction parallel to or with a predetermined off angle with respect to the one surface through a wire saw,
wherein the control unit controls a movement of the silicon carbide ingot toward the cutting unit and a supply amount of the wire saw,
wherein the cutting unit fabricates the silicon carbide wafer by performing: a cutting start step in which a cutting speed of the cutting unit is decreased to a first cutting speed; a cutting proceeding step in which the first cutting speed is substantially constant within a variation of about ±5%; and the cutting finish step in which the first cutting speed is increased and a cutting of the silicon carbide ingot is completed,
wherein a supply amount (m/min) of the wire saw of the cutting unit approaches a first supply amount in the cutting start step and is substantially constant within a variation about ±5%,
wherein r is a radius of the one surface, and
wherein a is i) 1.4 rad to 1.75 rad or ii) 2.96 rad to 3.32 rad.