Accession Number:

ADA229747

Title:

Laser and Electrochemical Studies of Metallizations in Electronic Devices

Descriptive Note:

Final rept. 1 Sep 1988-31 Aug 1989,

Corporate Author:

ISRAEL INST OF METALS HAIFA

Personal Author(s):

Report Date:

1990-10-01

Pagination or Media Count:

49.0

Abstract:

Irradiation of a PbSn coating with excimer laser at 193nm with power density of 0.5 to 0.7 Jpsq cm resulted in producing surface melting. Pb-rich particles were found before and after laser treatment. Increasing the laser energy level as well as increasing the repetition rate resulted in decreasing the size of these particles. Corrosion studies by potentiodynamic technique show that the corrosion potential changed in the noble direction when the repetition rate and laser energy were increased. The laser-treated area did not corrode although the as-deposited adjacent area did. Corrosion occurred by general mode corrosion while lead was preferentially dissolved.ttl

Subject Categories:

  • Lasers and Masers
  • Coatings, Colorants and Finishes

Distribution Statement:

APPROVED FOR PUBLIC RELEASE