Fabrication and characteristics of highly 110-oriented nanotwinned Au films

Wei-Lan Chiu, Chien-Min Liu, Han-wen Lin, John A. Wu, Ya-Ching Chou, King-Ning Tu, Chih Chen*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

Fine grained and nanotwinned Au has many excellent properties and is widely used in electronic devices. We have fabricated 110 preferred-oriented Au thin films by DC plating at 5 mA/cm(2). Microstructure analysis of the films show a unique fine grain structure with a twin formation. Hardness tests performed on electroplated 110 Au films show a hardness 47% greater than random and untwinned Au. We then achieved direct bonding between two Au 110 surfaces operating at 200 degrees C for an hour in a vacuum oven. The highly-oriented 110 nanotwinned Au films could be an ideal material in many gold products.

Original languageEnglish
Article number16566
Number of pages10
JournalScientific reports
Volume10
Issue number1
DOIs
StatePublished - 6 Oct 2020

Keywords

  • ULTRAHIGH-STRENGTH
  • THIN-FILMS
  • GOLD
  • NANOINDENTATION
  • BEHAVIOR
  • GROWTH
  • STRESS
  • CU

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