CORROSION-RESISTANT LEAD FRAME

CORROSION-RESISTANT LEAD FRAME

PROBLEM TO BE SOLVED: To provide a lead frame having new structure, in which the generation of the oxidation and corrosion of the lead frame in the assembly process of a semiconductor package is inhibited and the deterioration of the reliability of the semiconductor package due to the oxidation and...

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Hauptverfasser: KOU KIEN, KIN KISHIYAKU, RI ZAIIN
Format: Patent
Sprache:eng
Schlagworte:
BASIC ELECTRIC ELEMENTS
ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR
ELECTRICITY
SEMICONDUCTOR DEVICES
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creator KOU KIEN
KIN KISHIYAKU
RI ZAIIN
description PROBLEM TO BE SOLVED: To provide a lead frame having new structure, in which the generation of the oxidation and corrosion of the lead frame in the assembly process of a semiconductor package is inhibited and the deterioration of the reliability of the semiconductor package due to the oxidation and the corrosion is prevented. SOLUTION: This lead frame 10 contains die pads 1, on which semiconductor chips are mounted, and leads 3 and 4 electrically connected to the semiconductor chips, and is composed of a functional section as a part of a package when the packaging is completed and a nonfunctional section comprising side rails 5 supporting the functional section and not used as a part of the package at the time of the completion of packaging and removed. Other metals functioning as a reducing agent to metals placed on the positive side in the rank of electrochemical series or corrosion potential series and used for the above-mentioned functional section are employed for a part or the whole of the nonfunctional section at that time.
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SOLUTION: This lead frame 10 contains die pads 1, on which semiconductor chips are mounted, and leads 3 and 4 electrically connected to the semiconductor chips, and is composed of a functional section as a part of a package when the packaging is completed and a nonfunctional section comprising side rails 5 supporting the functional section and not used as a part of the package at the time of the completion of packaging and removed. 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subjects BASIC ELECTRIC ELEMENTS
ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR
ELECTRICITY
SEMICONDUCTOR DEVICES
title CORROSION-RESISTANT LEAD FRAME
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