Accession Number:

ADA151952

Title:

Establishment of Production Cleanliness Criteria and Processes for Printed Wiring Boards and Assemblies.

Descriptive Note:

Final rept. 27 Apr-23 Dec 81 on Phase 2,

Corporate Author:

MARTIN MARIETTA AEROSPACE ORLANDO FL

Personal Author(s):

Report Date:

1981-12-01

Pagination or Media Count:

226.0

Abstract:

The Phase I Final Technical Report FTR 24 April 1978 through 26 April 1979 of the program suggested that a systems approach be used to solve the problem of contamination on printed wiring PW. The solution was to design, assemble, and integrate a system giving a detailed profile of practically all of the ionic contaminant species. Profiling a species means detecting it qualitative and measuring its concentration quantitative. The system was to consist of various pieces of analytical instrumentation suitable for profiling individual species and a minicomputer. The Minicomputers purpose was for final analysis of the results, overall systems control of the analytical instrumentation, and final report generation. The two most promising methods of profiling contaminants on PW were direct surface analysis techniques and solvent extractionanalysis techniques. An experiment was performed to decide the better of the two extractionanalysis techniques were better. Thus the contaminant profiling CP system was assembled and built using solvent extractionanalysis instrumentation coupled to a minicomputer. The main components of the CP system are the 1 Inductively-coupled plasma emission spectrophotometergraphite furnace atomic absorption spectrophotometer 2 Ion chromatograph 3 Minicomputer and computing integrator unit 4 Extraction tankpumping unit 5 Water purification unit. As a continuation of the present program, it is recommended this system be used to build a data base for printed wiring contamination.

Descriptors:

Subject Categories:

  • Electrical and Electronic Equipment

Distribution Statement:

APPROVED FOR PUBLIC RELEASE


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