Hello,
I need to do Au-Au thermal compression bond using Karl Suss bonder.
Sometimes the bonding is not uniform across the wafer. I understand that it
could have been caused by particles on the wafer or film uniformity, etc.
My question is:
Is there a requirement for wafer flatness (TTV less than ?? um) in order to
achieve a uniform bond. Any comments and suggestions are appreciated.
Melvin
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