Patent ID: 11948789
Assignee: SUMCO CORPORATION
Field: Machine tools (Mechanical engineering)
Classification: CPC H  B | IPC B  H

Claim 0:
1. A manufacturing method of a wafer produced by slicing a monocrystal ingot using a wire-saw machine and grinding the wafer, the method comprising:
a first resin-application grinding step; a second resin-application grinding step; and a third surface-grinding step, wherein
the first resin-application grinding step comprises:
a first coating-layer formation step of applying a curing material all over a second surface of the wafer to form a flat first coating layer;
a first surface-grinding step of placing the wafer on a table of a grinding machine so that the first coating layer is in contact with a reference surface of the table and, subsequently, surface-grinding a first surface of the wafer by the grinding machine; and
a first coating-layer removal step of removing the first coating layer after the first surface-grinding step from the second surface of the wafer,
the second resin-application grinding step comprises:
a second coating-layer formation step of applying the curing material all over the first surface of the wafer to form a flat second coating layer;
a second surface-grinding step of placing the wafer on the table of the grinding machine so that the second coating layer is in contact with the reference surface of the table and, subsequently, surface-grinding the second surface of the wafer by the grinding machine; and
a second coating-layer removal step of removing the second coating layer after the second surface-grinding step from the first surface of the wafer, and
the third surface-grinding step comprises:
placing the wafer on the table so that a lastly surface-ground surface is in contact with the reference surface of the table of the grinding machine and, subsequently, surface-grinding a surface of the wafer opposite the surface in contact with the reference surface by the grinding machine.