Accession Number:

ADA193786

Title:

Laser and Electrochemical Studies of Metallizations in Electronic Devices.

Descriptive Note:

Annual research rept. no. 2, 1 Sep 86-31 Aug 87,

Corporate Author:

ISRAEL INST OF METALS HAIFA

Personal Author(s):

• Zahavi, J.
• Rotel, M.
• Dobbs, B.

Report Date:

1987-12-01

Pagination or Media Count:

57.0

Abstract:

The research during this year was concerned with application of excimer laser 193nm, 24 nsec, 10 to the 6th power - 10 to the 7th power wattsq cm pulse to Pb-Sn surfaces. The laser induced melting of the Pb-Sn coating resulted in bright area in which lead-rich zone were observed. Perferential dissolution of lead was observed during electrochemical potentiodynamic polarization of both the as -deposited and laser treated surfaces. Calculation showed that the laser-treated specimen had higher corrosion rates than as-deposited counter-parts. Keywords Laser treatment Pb-Sn coating, Corrosion, and Potentiodynamic polarization.

Descriptors:

• *EXCIMERS
• *LASERS
• *LEAD(METAL)
• *TIN
• BRIGHTNESS
• CORROSION
• ELECTROCHEMISTRY
• ELECTRONIC EQUIPMENT
• HIGH RATE
• LASER APPLICATIONS
• MELTING
• METALLIZING
• PULSES

Subject Categories:

• Lasers and Masers
• Inorganic Chemistry

Distribution Statement:

APPROVED FOR PUBLIC RELEASE