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Palladium-plated silver-plated double-plating bonding copper wire

A technology for bonding copper wire and coating, which is used in electrical components, electrical solid devices, circuits, etc.

Inactive Publication Date: 2013-07-24
溧阳市虹翔机械制造有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a double-coated bonding copper wire to overcome the high production cost of the existing gold-plated bonding copper wire Defects of poor ductility of bonding copper wire

Method used

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  • Palladium-plated silver-plated double-plating bonding copper wire

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Embodiment

[0015] Such as figure 1 As shown, the double-coated bonding copper wire proposed by the present invention includes a copper core 1 , a palladium-coated layer 2 and a silver-coated layer 3 . Among them, the copper core 1 is made of high-purity copper with a purity greater than 99.9995% as a raw material, and is formed by adding tin, magnesium and aluminum for single crystal melting; Plated on the surface of the copper core; the silver-plated layer 3 is made of metallic silver with a purity greater than 99.99%, which is electroplated on the surface of the palladium-plated layer 2 through an electroplating process. Wherein, based on 100 parts by weight of the finally prepared double-coated bonding copper wire containing palladium-plated layer and silver-plated layer, that is, 100wt%, the content of pure copper in the copper core is 91.2 ~ 92.8wt%, pure palladium conductive The content of the layer is 3.3-4.2wt%, the content of the pure silver conductive layer is 2-4.5wt%, the c...

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Abstract

The invention discloses a double-plating bonding copper wire of a three-layer structure. The innermost layer of the copper wire is a copper core formed due to the fact that trace metal elements are added to high-purity copper, a pure-palladium conductive layer plates the surface of the copper core, and a pure-silver conductive layer plates the surface of the pure-palladium conductive layer. The trace metal elements include tin, magnesium and aluminum.

Description

technical field [0001] The invention belongs to the field of semiconductor integrated circuit chip packaging, and in particular relates to a double-coated copper wire for semiconductor integrated circuit chip bonding. Background technique [0002] Although the chip obtained after the semiconductor integrated circuit is manufactured has a specific function, it must be connected with external electronic components to realize this function. The semiconductor integrated circuit chip needs to go through a bonding process with the package body, and finally get the chip package, so that it can be connected to external electronic components through the package pins. In the bonding process of the chip and the package, the bonding pads on the chip are electrically connected to the pins of the package through bonding wires. Therefore, the bonding wire is an essential material to realize the function of the chip. In the prior art, most bonding wires are made of pure gold because of it...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L23/49C25D7/06
CPCH01L24/45H01L2224/45664H01L2224/45639H01L2224/45572H01L2224/45147H01L24/43H01L2224/43H01L2224/4321H01L2224/43848H01L2224/45H01L2224/45015H01L2924/00011H01L2924/00014H01L2924/01047H01L2924/0105H01L2924/01012H01L2924/01013H01L2924/01205H01L2924/013H01L2924/00H01L2224/48H01L2924/20111H01L2924/00012H01L2924/01033
Inventor 吕燕翔居勤坤史仁龙万传友彭芳美周国忠
Owner 溧阳市虹翔机械制造有限公司
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