0
TECHNICAL PAPERS

Characterization of Laser Cleaning of Copper for Soldering Processes

[+] Author and Article Information
J. M. Lee, K. G. Watkins, W. M. Steen

Laser Group, Department of Engineering, University of Liverpool, Brownlow Street, Liverpool L69 3GH, UK

J. Manuf. Sci. Eng 123(3), 521-527 (Jan 01, 2000) (7 pages) doi:10.1115/1.1344897 History: Received June 01, 1999; Revised January 01, 2000
Copyright © 2001 by ASME
Your Session has timed out. Please sign back in to continue.

References

Figures

Grahic Jump Location
Soldering features with and without cleaning the surface: (a) without cleaning (b) with cleaning
Grahic Jump Location
Reflectance spectrum for oxidized surface and clean surface
Grahic Jump Location
Schematic diagram of (a) one dimensional surface heating model and (b) laser pulse shape
Grahic Jump Location
Contours of constant temperature for Eq. (2) on the surface at the time of 10 nsec
Grahic Jump Location
Laser craters on an oxidized copper surface with the sequence of the number of laser pulses with 1064 nm wavelength: (a) laser fluence=3.5 J/cm (b) laser fluence=6.9 J/cm2
Grahic Jump Location
Acoustic waves emitted from an oxidized copper substrate under laser irradiation form (a) the first to (d) the fourth pulse respectively in the laser fluence of 3.5 J/cm2
Grahic Jump Location
Acoustic emission intensity as a function of the number of laser pulses in the laser cleaning of an oxidized copper surface and a clean (nonoxidized) copper surface in the laser fluence of 3.5 J/cm2
Grahic Jump Location
Acoustic emission intensity as a function of the number of laser pulses in the fluences of 3.5 J/cm2 and 6.9 J/cm2
Grahic Jump Location
Acoustic emission intensity as a function of laser fluence in the laser cleaning of an oxidized copper surface and a clean copper surface
Grahic Jump Location
Laser craters on an oxidized copper surface with the sequence of the number of laser pulses with different wavelengths. (a) 1064 nm (fluence=4.5 J/cm2) (b) 532 nm (fluence=4.4 J/cm2)
Grahic Jump Location
Magnified laser craters on the black ink over-coated surface produced by the irradiation of the fifth laser pulse at 532 nm (left crater) and 1064 nm (right crater)
Grahic Jump Location
Comparison between the experimental threshold laser fluence and the theoretical threshold fluence for copper oxide evaporation at the two wavelengths
Grahic Jump Location
The intensity of the acoustic shock waves as a function of the number of laser pulses at the two wavelengths (1064 nm and 532 nm) in the laser fluence of 3.5 J/cm2

Tables

Errata

Discussions

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related Journal Articles
Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In