Microstructural evolution and micromechanical properties of gamma-irradiated Au ball bonds

Wan Yusmawati Wan Yusoff, Roslina Ismail, Azman Jalar @ Jalil, Norinsan Kamil Othman, Irman Abdul Rahman

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

The effect of gamma radiation on the mechanical and structural properties of gold ball bonds was investigated. Gold wires from thermosonic wire bonding were exposed to gamma rays from a Cobalt-60 source at a low dose (5 Gy). The load-depth curve of nanoindentation for the irradiated gold wire bond has an apparent staircase shape during loading compared to the as-received sample. The hardness of the specimens calculated from the nanoindentation shows an increase in value from 0.91 to 1.09 GPa for specimens after exposure. The reduced elastic modulus for irradiated specimens significantly increased as well, with values from 75.18 to 98.55 GPa. The change in intrinsic properties due to gamma radiation was investigated using dual-focused ion beam and high-resolution transmission electron microscope analysis. The dual-focused ion beam and high-resolution transmission electron microscope images confirmed the changes in grain structure and the presence of dislocations. The scanning electron microscope micrographs of focused ion beam cross sections showed that the grain structure of the gold became elongated and smaller after exposure to gamma rays. Meanwhile, high-resolution transmission electron microscopy provided evidence that gamma radiation induced dislocation of the atomic arrangement.

Original languageEnglish
Pages (from-to)129-135
Number of pages7
JournalMaterials Characterization
Volume93
DOIs
Publication statusPublished - 2014

Fingerprint

Microstructural evolution
Gamma rays
balls
Gold
gamma rays
Focused ion beams
gold
Electron microscopes
electron microscopes
ion beams
Crystal microstructure
wire
Wire
Nanoindentation
nanoindentation
high resolution
cobalt 60
stairways
High resolution transmission electron microscopy
Cobalt

Keywords

  • Au ball bond
  • Dual-FIB
  • Gamma radiation
  • HRTEM
  • Nanoindentation

ASJC Scopus subject areas

  • Mechanical Engineering
  • Mechanics of Materials
  • Materials Science(all)
  • Condensed Matter Physics

Cite this

Microstructural evolution and micromechanical properties of gamma-irradiated Au ball bonds. / Yusoff, Wan Yusmawati Wan; Ismail, Roslina; Jalar @ Jalil, Azman; Othman, Norinsan Kamil; Abdul Rahman, Irman.

In: Materials Characterization, Vol. 93, 2014, p. 129-135.

Research output: Contribution to journalArticle

@article{32de3bc229e047508aece783686c7afb,
title = "Microstructural evolution and micromechanical properties of gamma-irradiated Au ball bonds",
abstract = "The effect of gamma radiation on the mechanical and structural properties of gold ball bonds was investigated. Gold wires from thermosonic wire bonding were exposed to gamma rays from a Cobalt-60 source at a low dose (5 Gy). The load-depth curve of nanoindentation for the irradiated gold wire bond has an apparent staircase shape during loading compared to the as-received sample. The hardness of the specimens calculated from the nanoindentation shows an increase in value from 0.91 to 1.09 GPa for specimens after exposure. The reduced elastic modulus for irradiated specimens significantly increased as well, with values from 75.18 to 98.55 GPa. The change in intrinsic properties due to gamma radiation was investigated using dual-focused ion beam and high-resolution transmission electron microscope analysis. The dual-focused ion beam and high-resolution transmission electron microscope images confirmed the changes in grain structure and the presence of dislocations. The scanning electron microscope micrographs of focused ion beam cross sections showed that the grain structure of the gold became elongated and smaller after exposure to gamma rays. Meanwhile, high-resolution transmission electron microscopy provided evidence that gamma radiation induced dislocation of the atomic arrangement.",
keywords = "Au ball bond, Dual-FIB, Gamma radiation, HRTEM, Nanoindentation",
author = "Yusoff, {Wan Yusmawati Wan} and Roslina Ismail and {Jalar @ Jalil}, Azman and Othman, {Norinsan Kamil} and {Abdul Rahman}, Irman",
year = "2014",
doi = "10.1016/j.matchar.2014.03.024",
language = "English",
volume = "93",
pages = "129--135",
journal = "Materials Characterization",
issn = "1044-5803",
publisher = "Elsevier Inc.",

}

TY - JOUR

T1 - Microstructural evolution and micromechanical properties of gamma-irradiated Au ball bonds

AU - Yusoff, Wan Yusmawati Wan

AU - Ismail, Roslina

AU - Jalar @ Jalil, Azman

AU - Othman, Norinsan Kamil

AU - Abdul Rahman, Irman

PY - 2014

Y1 - 2014

N2 - The effect of gamma radiation on the mechanical and structural properties of gold ball bonds was investigated. Gold wires from thermosonic wire bonding were exposed to gamma rays from a Cobalt-60 source at a low dose (5 Gy). The load-depth curve of nanoindentation for the irradiated gold wire bond has an apparent staircase shape during loading compared to the as-received sample. The hardness of the specimens calculated from the nanoindentation shows an increase in value from 0.91 to 1.09 GPa for specimens after exposure. The reduced elastic modulus for irradiated specimens significantly increased as well, with values from 75.18 to 98.55 GPa. The change in intrinsic properties due to gamma radiation was investigated using dual-focused ion beam and high-resolution transmission electron microscope analysis. The dual-focused ion beam and high-resolution transmission electron microscope images confirmed the changes in grain structure and the presence of dislocations. The scanning electron microscope micrographs of focused ion beam cross sections showed that the grain structure of the gold became elongated and smaller after exposure to gamma rays. Meanwhile, high-resolution transmission electron microscopy provided evidence that gamma radiation induced dislocation of the atomic arrangement.

AB - The effect of gamma radiation on the mechanical and structural properties of gold ball bonds was investigated. Gold wires from thermosonic wire bonding were exposed to gamma rays from a Cobalt-60 source at a low dose (5 Gy). The load-depth curve of nanoindentation for the irradiated gold wire bond has an apparent staircase shape during loading compared to the as-received sample. The hardness of the specimens calculated from the nanoindentation shows an increase in value from 0.91 to 1.09 GPa for specimens after exposure. The reduced elastic modulus for irradiated specimens significantly increased as well, with values from 75.18 to 98.55 GPa. The change in intrinsic properties due to gamma radiation was investigated using dual-focused ion beam and high-resolution transmission electron microscope analysis. The dual-focused ion beam and high-resolution transmission electron microscope images confirmed the changes in grain structure and the presence of dislocations. The scanning electron microscope micrographs of focused ion beam cross sections showed that the grain structure of the gold became elongated and smaller after exposure to gamma rays. Meanwhile, high-resolution transmission electron microscopy provided evidence that gamma radiation induced dislocation of the atomic arrangement.

KW - Au ball bond

KW - Dual-FIB

KW - Gamma radiation

KW - HRTEM

KW - Nanoindentation

UR - http://www.scopus.com/inward/record.url?scp=84899843583&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84899843583&partnerID=8YFLogxK

U2 - 10.1016/j.matchar.2014.03.024

DO - 10.1016/j.matchar.2014.03.024

M3 - Article

VL - 93

SP - 129

EP - 135

JO - Materials Characterization

JF - Materials Characterization

SN - 1044-5803

ER -