Patent ID: 11901171
Assignee: TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY LTD.
Field: Machine tools (Mechanical engineering)
Classification: CPC H  B | IPC B  H

Claim 0:
1. A method comprising:
aligning a stealth laser apparatus over a wafer using an infrared camera coupled to the stealth laser apparatus, wherein the infrared camera aligns the stealth laser apparatus using an alignment mark below the wafer;
using the stealth laser apparatus to form a stealth damage region within the wafer, the stealth damage region separating an inner region of the wafer from an outer region of the wafer;
forming a groove in the wafer to separate the outer region from the inner region of the wafer, wherein the groove extends from a top surface to a bottom surface of the wafer; and
applying a force to the wafer to remove the outer region of the wafer.