NOBLE METAL-COATED COPPER WIRE FOR BALL BONDING

A noble metal-coated copper wire for ball bonding, with a wire diameter between 10 μm or more, and 25 μm or less, includes a core material having a copper alloy having a copper purity of 98 mass % or higher, and a noble metal-coating layer formed on the core material. The noble metal-coating layer i...

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Bibliographische Detailangaben
Hauptverfasser:	SAKITA Yusuke, CHEN Wei, ANTOKU Yuki, YARITA Somei, AMANO Hiroyuki
Format:	Patent
Sprache:	eng
Schlagworte:	BASIC ELECTRIC ELEMENTS CABLES CONDUCTORS ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR ELECTRICITY INSULATORS SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING ORDIELECTRIC PROPERTIES SEMICONDUCTOR DEVICES
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Beschreibung
Zusammenfassung:	A noble metal-coated copper wire for ball bonding, with a wire diameter between 10 μm or more, and 25 μm or less, includes a core material having a copper alloy having a copper purity of 98 mass % or higher, and a noble metal-coating layer formed on the core material. The noble metal-coating layer includes a palladium cavitating layer containing palladium; at least one element selected from the group consisting of Group 13 to 16 elements or an oxygen element, finely dispersed in the palladium; and a diffusion layer formed of copper diffused into the palladium. The noble metal-coating layer may include a palladium cavitating layer containing palladium, at least one element selected from the group consisting of Group 13 to 16 elements or an oxygen element, finely dispersed therein, and a nickel intermediate layer disposed between the core material and the noble metal-coating layer.