Mechanical property and reliability of bimodal nano-silver paste with Ag-coated SiC particles
Artikel i vetenskaplig tidskrift, 2019

© 2019, Emerald Publishing Limited. Purpose: This study aims to develop a bimodal nano-silver paste with improved mechanical property and reliability. Silicon carbide (SiC) particles coated with Ag were introduced in nano-silver paste to improve bonding strength between SiC and Ag particles and enhance high-temperature stability of bimodal nano-silver paste. The effect of sintering parameters such as sintering temperature, sintering time and the proportion of SiC particles on mechanical property and reliability of sintered bimodal nano-silver structure were investigated. Design/methodology/approach: Sandwich structures consist of dummy chips and copper substrates with nickel and silver coating bonded by nano-silver paste were designed for shear testing. Shear strength testing was conducted to study the influence of SiC particles proportions on the mechanical property of sintered nano-silver joints. The reliability of the bimodal nano-silver paste was evaluated experimentally by means of shear test for samples subjected to thermal aging test at 150°C and humidity and temperature testing at 85°C and 85 per cent RH, respectively. Findings: Shear strength was enhanced obviously with the increase of sintering temperature and sintering time. The maximum shear strength was achieved for nano-silver paste sintered at 260°C for 10 min. There was a negative correlation between the proportion of SiC particles and shear strength. After thermal aging testing and humidity and temperature testing for 240 h, the shear strength decreased a little. High-temperature stability and high-hydrothermal stability were improved by the addition of SiC particles. Originality/value: Submicron-scale SiC particles coated with Ag were used as alternative materials to replace part of nano-silver particles to prepare bimodal nano-silver paste due to its high thermal conductivity and excellent mechanical property.

Silver-coated SiC particles

Bimodal nano-silver paste

Shear strength

Reliability

Författare

Q. Zhang

Shanghai University

Abdelhafid Zehri

Chalmers, Mikroteknologi och nanovetenskap (MC2), Elektronikmaterial och system

Jiawen Liu

Shanghai University

Wei Ke

Shanghai University

S. Huang

Shanghai University

Martí Gutierrez Latorre

Chalmers, Mikroteknologi och nanovetenskap (MC2), Kvantteknologi

Nan Wang

Chalmers, Mikroteknologi och nanovetenskap (MC2), Elektronikmaterial och system

Xiuzhen Lu

Shanghai University

Cheng Zhou

Aerospace Science and Technology Corporation

Weijuan Xia

Aerospace Science and Technology Corporation

Yanpei Wu

Aerospace Science and Technology Corporation

L. Ye

SHT Smart High-Tech

Johan Liu

Chalmers, Mikroteknologi och nanovetenskap (MC2), Elektronikmaterial och system

Soldering and Surface Mount Technology

0954-0911 (ISSN)

Vol. in press

Ämneskategorier

Keramteknik

Bearbetnings-, yt- och fogningsteknik

Annan materialteknik

DOI

10.1108/SSMT-05-2018-0014

Mer information

Senast uppdaterat

2019-05-28