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Zuverlässigkeitsuntersuchungen von Aluminium-Drahtbonds auf Gold Dickschichtleiterbahnen

Reliability study of aluminium wire bonds on gold thick film conductors
 
: Haag, J.F.

Deutscher Verband für Schweißtechnik e.V. -DVS-, Düsseldorf:
Verbindungstechnik in der Elektronik. Vorträge und Poster-Beiträge des 5. Internationalen Kolloquiums
Düsseldorf: DVS-Verlag, 1990 (DVS-Berichte 129)
ISBN: 3-87155-434-0
Internationales Kolloquium "Verbindungstechnik in der Elektronik" <5, 1990, Fellbach>
German
Conference Paper
Fraunhofer IFT; 2000 dem IZM eingegliedert
Drahtbonden; pull-test; purple plague; Purpurpest; reliability; wire bonding; Zugtest; Zuverlässigkeit

Abstract
The ageing characteristics of aluminium wire bonds on five different thick film gold inks were investigated. The assessment criteria selected were the pull strength and the electrical resistance of the bonds. A correlation between these does not exist. Under stress the bond strength first declines sharply, however, afterwards stabilizes at a level that can just be accepted. The electrical resistance of the bond, in contrast, rises slowly, but then reaches values, at which the contact is no longer guaranteed. Internal oxidation is proposed as a new explanation for this behaviour.

: http://publica.fraunhofer.de/documents/PX-42632.html