Patent ID: 11969827
Assignee: TOKYO ELECTRON LIMITED
Field: Machine tools (Mechanical engineering)
Classification: CPC B  H | IPC B

Claim 4:
5. A processing method of processing a processing target object, comprising:
forming, by a modifying device, internal modification layers in a spiral shape by radiating laser light to an inside of the processing target object held by a holder; and
sharing, by the holder and the modifying device, a spiral processing movement of forming the internal modification layers in the spiral shape and an eccentricity follow-up movement of correcting an eccentric amount between the holder and the processing target object held by the holder,
wherein the spiral processing movement involves horizontally shifting one of the holder and the modifying device while rotating the holder, and
wherein the eccentricity follow-up movement involves horizontally shifting the other of the holder and the modifying device to follow an eccentricity between the holder and the processing target object while rotating the holder.