Transient Liquid Phase Behavior of Sn-Coated Cu Particles and Chip Bonding using Paste Containing the Particles

Autor: Hwang Jun Ho, Lee Jong-Hyun
Jazyk: angličtina
Rok vydání: 2017
Předmět:
Zdroj: Archives of Metallurgy and Materials, Vol 62, Iss 2, Pp 1143-1148 (2017)
Druh dokumentu: article
ISSN: 2300-1909
DOI: 10.1515/amm-2017-0167
Popis: Sn-coated Cu particles were prepared as a filler material for transient liquid phase (TLP) bonding. The thickness of Sn coating was controlled by controlling the number of plating cycles. The Sn-coated Cu particles best suited for TLP bonding were fabricated by Sn plating thrice, and the particles showed a pronounced endothermic peak at 232°C. The heating of the particles for just 10 s at 250°C destroyed the initial core-shell structure and encouraged the formation of Cu-Sn intermetallic compounds. Further, die bonding was also successfully performed at 250°C under a slight bonding pressure of around 0.1 MPa using a paste containing the particles. The bonding time of 30 s facilitated the bonding of Sn-coated Cu particles to the Au surface and also increased the probability of network formation between particles.
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