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

Claim 0:
1. A processing apparatus configured to process a processing target object, comprising:
a holder configured to hold the processing target object;
a holder moving mechanism configured to move the holder in a horizontal direction;
a modifying device configured to radiate laser light to an inside of the processing target object to form multiple internal modification layers in a spiral shape;
a modifying device moving mechanism configured to move the modifying device in the horizontal direction; and
a controller configured to control an operation of forming the internal modification layers,
wherein the controller controls operations of the holder and the modifying device such that a spiral processing movement according to the formation of the internal modification layers and an eccentricity follow-up movement of correcting an eccentric amount between the holder and the processing target object held by the holder are shared by the holder and the modifying device,
the spiral processing movement involves horizontally shifting one of the holder and the modifying device while rotating the holder, and
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.