Improved sinterability of micro-scale copper paste with a reducing agent

Soonyong Kwon; Tae Ik Lee; Hoo Jeong Lee; Sehoon Yoo

doi:10.1016/j.matlet.2020.127656

Improved sinterability of micro-scale copper paste with a reducing agent

Soonyong Kwon
, Tae Ik Lee
, Hoo Jeong Lee
, Sehoon Yoo

Department of Advanced Materials Science and Engineering

Research output: Contribution to journal › Article › peer-review

23 Scopus citations

Abstract

The sinterability of a micro-scale copper paste was improved by adding a reducing agent to the binder. The size of the copper particles ranged from 1 to 3 μm. The reducing agents were various dicarboxylic acids (glutaric, succinic, and adipic acid). The binder for the copper paste was formulated by mixing dicarboxylic acid and poly ethylene glycol (PEG). The shear strengths of the dicarboxylic acid + PEG samples were much higher than that without the reducing agent. The glutaric + PEG sample had a shear strength of over 40 MPa after sinter joining at 350 °C, which was higher than those of the succinic + PEG and adipic + PEG samples. The shear strength of the copper sinter joint did not significantly change with a bonding time up to 30 min.

Original language	English
Article number	127656
Journal	Materials Letters
Volume	269
DOIs	https://doi.org/10.1016/j.matlet.2020.127656
State	Published - 15 Jun 2020

Keywords

Copper paste
Microstructure
Powder technology
Power module
Reducing agent
Sinter joining

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10.1016/j.matlet.2020.127656

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title = "Improved sinterability of micro-scale copper paste with a reducing agent",

abstract = "The sinterability of a micro-scale copper paste was improved by adding a reducing agent to the binder. The size of the copper particles ranged from 1 to 3 μm. The reducing agents were various dicarboxylic acids (glutaric, succinic, and adipic acid). The binder for the copper paste was formulated by mixing dicarboxylic acid and poly ethylene glycol (PEG). The shear strengths of the dicarboxylic acid + PEG samples were much higher than that without the reducing agent. The glutaric + PEG sample had a shear strength of over 40 MPa after sinter joining at 350 °C, which was higher than those of the succinic + PEG and adipic + PEG samples. The shear strength of the copper sinter joint did not significantly change with a bonding time up to 30 min.",

keywords = "Copper paste, Microstructure, Powder technology, Power module, Reducing agent, Sinter joining",

author = "Soonyong Kwon and Lee, \{Tae Ik\} and Lee, \{Hoo Jeong\} and Sehoon Yoo",

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doi = "10.1016/j.matlet.2020.127656",

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T1 - Improved sinterability of micro-scale copper paste with a reducing agent

AU - Kwon, Soonyong

AU - Lee, Tae Ik

AU - Lee, Hoo Jeong

AU - Yoo, Sehoon

PY - 2020/6/15

Y1 - 2020/6/15

N2 - The sinterability of a micro-scale copper paste was improved by adding a reducing agent to the binder. The size of the copper particles ranged from 1 to 3 μm. The reducing agents were various dicarboxylic acids (glutaric, succinic, and adipic acid). The binder for the copper paste was formulated by mixing dicarboxylic acid and poly ethylene glycol (PEG). The shear strengths of the dicarboxylic acid + PEG samples were much higher than that without the reducing agent. The glutaric + PEG sample had a shear strength of over 40 MPa after sinter joining at 350 °C, which was higher than those of the succinic + PEG and adipic + PEG samples. The shear strength of the copper sinter joint did not significantly change with a bonding time up to 30 min.

AB - The sinterability of a micro-scale copper paste was improved by adding a reducing agent to the binder. The size of the copper particles ranged from 1 to 3 μm. The reducing agents were various dicarboxylic acids (glutaric, succinic, and adipic acid). The binder for the copper paste was formulated by mixing dicarboxylic acid and poly ethylene glycol (PEG). The shear strengths of the dicarboxylic acid + PEG samples were much higher than that without the reducing agent. The glutaric + PEG sample had a shear strength of over 40 MPa after sinter joining at 350 °C, which was higher than those of the succinic + PEG and adipic + PEG samples. The shear strength of the copper sinter joint did not significantly change with a bonding time up to 30 min.

KW - Copper paste

KW - Microstructure

KW - Powder technology

KW - Power module

KW - Reducing agent

KW - Sinter joining

UR - https://www.scopus.com/pages/publications/85081938934

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DO - 10.1016/j.matlet.2020.127656

M3 - Article

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SN - 0167-577X

VL - 269

JO - Materials Letters

JF - Materials Letters

M1 - 127656

ER -

Improved sinterability of micro-scale copper paste with a reducing agent

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Keywords

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