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Surface Treatments and Bondability of Copper Thick Film Circuits

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3 Author(s)
Liu, T. ; Honeywell Inc., MN and Norththrop Corp., CA ; Pitkanen, D. ; McIver, C.

Crucial issues in using copper thick film microcircuits, namely, surface treatment and bondability, are addressed. A multilayer multichip ceramic substrate package with copper thick film conductors was used for these experiments. Surface treatments for bondability specific to different types of bonding sites are discussed. Using a flip tape automated bonding (TAB) technology, the resultant bond interfaces were analyzed in the as-bonded as well as thermally aged conditions. Results indicate a metallurgically stable materials system which should exhibit long-term reliability. Specific recommendations on copper surface treatments and general guidelines on materials selection are made on the production of reliable copper thick film interconnections.

Published in:

Components, Hybrids, and Manufacturing Technology, IEEE Transactions on  (Volume:4 ,  Issue: 4 )

Date of Publication:

Dec 1981

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