Ultrasound aided smooth dispensing for high viscoelastic epoxy in microelectronic packaging

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

14 Scopus Citations
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Author(s)

  • Yun Chen
  • Xiuyang Shan
  • Jian Gao
  • Xin Chen
  • Fuliang Wang

Detail(s)

Original languageEnglish
Pages (from-to)15-20
Journal / PublicationUltrasonics Sonochemistry
Volume28
Publication statusPublished - 1 Jul 2016

Link(s)

Abstract

Epoxy dispensing is one of the most critical processes in microelectronic packaging. However, due its high viscoelasticity, dispensing of epoxy is extremely difficult, and a lower viscoelasticity epoxy is desired to improve the process. In this paper, a novel method is proposed to achieve a lowered viscoelastic epoxy by using ultrasound. The viscoelasticity and molecular structures of the epoxies were compared and analyzed before and after experimentation. Different factors of the ultrasonic process, including power, processing time and ultrasonic energy, were studied in this study. It is found that elasticity is more sensitive to ultrasonic processing while viscosity is little affected. Further, large power and long processing time can minimize the viscoelasticity to ideal values. Due to the reduced loss modulus and storage modulus after ultrasonic processing, smooth dispensing is demonstrated for the processed epoxy. The subsequently color temperature experiments show that ultrasonic processing will not affect LED's lighting. It is clear that the ultrasonic processing will have good potential to aide smooth dispensing for high viscoelastic epoxy in electronic industry.

Research Area(s)

  • Epoxy, Fluid dispensing, Lowering viscoelasticity, Ultrasonic processing

Citation Format(s)

Ultrasound aided smooth dispensing for high viscoelastic epoxy in microelectronic packaging. / Chen, Yun; Li, Han-Xiong; Shan, Xiuyang; Gao, Jian; Chen, Xin; Wang, Fuliang.

In: Ultrasonics Sonochemistry, Vol. 28, 01.07.2016, p. 15-20.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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