Method for manufacturing electronic component

The present invention provide a resistance welding method for solving the problem of breakage of the welded portion by corrosion of an iron-copper alloy layer having a poor corrosion resistance formed at the welding portion, when a first metallic member comprising an iron-based metal is joined to a...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	KITAGAWA TOSHIO, KITAGAWA MASAKI, ASAKURA AKITO, NAGATSUKA EIICHI, UEYAMA AKIHIKO
Format:	Patent
Sprache:	eng
Schlagworte:	APPARATUS THEREFOR BASIC ELECTRIC ELEMENTS CAPACITORS CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES ORLIGHT-SENSITIVE DEVICES, OF THE ELECTROLYTIC TYPE CHEMISTRY CLADDING OR PLATING BY SOLDERING OR WELDING CURRENT COLLECTORS CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING ELECTRICITY ELECTROFORMING ELECTROLYTIC OR ELECTROPHORETIC PROCESSES GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS LINE CONNECTORS MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR METALLURGY PERFORMING OPERATIONS PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTIONOF COATINGS SOLDERING OR UNSOLDERING TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION TECHNICAL SUBJECTS COVERED BY FORMER USPC TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS TRANSPORTING WELDING WORKING BY LASER BEAM
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Beschreibung
Zusammenfassung:	The present invention provide a resistance welding method for solving the problem of breakage of the welded portion by corrosion of an iron-copper alloy layer having a poor corrosion resistance formed at the welding portion, when a first metallic member comprising an iron-based metal is joined to a second metallic member comprising a copper based metal, wherein the problem above is solved by forming a nickel film on at least one surface of the first metallic member comprising the iron-based metal and the second metallic member comprising the copper-based metal to be joined, and by applying resistance welding while the first metallic member is made to butt against the second metallic member, thereby forming the first alloy layer containing nickel, copper and iron at the side of the first metallic member, and the second alloy layer containing nickel and copper at the side of the second metallic member to allow the alloy layers to exhibit an excellent corrosion resistance.