Document Type

Article

Publication Date

9-2004

Journal or Book Title

Gold Bulletin

Volume

37

Issue

3–4

First Page

174

Last Page

180

DOI

10.1007/BF03215210

Abstract

Recovery and recrystallization of Au wire can degrade strength and alter conductivity properties during exposure to elevated temperature. Au Deformation Processed Metal-Metal Composites (Au DMMC’s) are being developed for electronic applications requiring high conductivity and high strength. This paper discusses the relationships between microstructure, strength, and resistivity of Au DMMC’s. Au DMMC samples were prepared by a powder metallurgy technique and processed into wire down to diameters as low as 120μm. The extensive deformation reshaped the initially equi-axed powder into filaments that are 30 to 100 nm in diameter and 16 to 180 mm in length, which confers high strength. The high conductivity can be explained by electrons flowing parallel to the filamentary microstructure aligned with the wire axis. Au DMMC’s were found to have good thermal stability compared to conventional cold-worked Au interconnection wires. Although these composites will revert to solid solutions if exposed to high temperatures for prolonged times, their relative stability is sufficient to allow them to maintain their two-phase microstructure during the anticipated lifetime temperature profiles of many products.

Comments

This article is from Gold Bulletin 37 (2004): 174–180, doi:10.1007/BF03215210.

Rights

This article is published under the Creative Commons Attribution License.

Copyright Owner

The authors

Language

en

File Format

application/pdf

Included in

Metallurgy Commons

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