In-situ chemical-mechanical planarization pad metrology...

Abrading – Precision device or process - or with condition responsive... – Computer controlled

Reexamination Certificate

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C451S006000, C451S010000, C451S011000, C451S021000, C451S056000

Reexamination Certificate

active

10970338

ABSTRACT:
Chemical-mechanical planarization (CMP) apparatus and methods for detecting polishing pad properties using ultrasonic imaging is presented. An ultrasonic probe assembly transmits ultrasonic signals onto the surface of a polishing pad during a CMP process. Reflected ultrasonic signals are collected and analyzed to monitor polishing pad properties in real-time. This allows CMP process adjustments to be made during the CMP process.

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