TAPE CARRIER FOR TAB

TAPE CARRIER FOR TAB

PURPOSE:To obtain a tape carrier for TAB where formation of an intermetallic compound of Cu and Sn is suppressed to prevent the break of an inner lead, by providing Sn or Sn-Pb plating, which contains Zn, on the surface of a copper pattern lead. CONSTITUTION:On a copper pattern lead 11 excluding, at...

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Hauptverfasser: FUKUMAKI TAKASHI, ONDA MAMORU
Format: Patent
Sprache:eng
Schlagworte:
BASIC ELECTRIC ELEMENTS
ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR
ELECTRICITY
SEMICONDUCTOR DEVICES
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creator FUKUMAKI TAKASHI
ONDA MAMORU
description PURPOSE:To obtain a tape carrier for TAB where formation of an intermetallic compound of Cu and Sn is suppressed to prevent the break of an inner lead, by providing Sn or Sn-Pb plating, which contains Zn, on the surface of a copper pattern lead. CONSTITUTION:On a copper pattern lead 11 excluding, at least, the inner lead, an Sn or Sn-Pb plated layer 30 which contains Zn is made. This way, by applying Sn or Sn-Pb plating, which contains Zn, the formation of the hard intermetallic compound produced by the reaction between Cu and Sn can be prevented, so the break of the inner lead and the wire breaking by corrosion under corrosive environment can be prevented. Therefore, when making high- class precision machines, it becomes possible to mass-produce them, using tape carriers for TAB.
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subjects BASIC ELECTRIC ELEMENTS
ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR
ELECTRICITY
SEMICONDUCTOR DEVICES
title TAPE CARRIER FOR TAB
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