Improving delamination resistance of multilayer printed wiring boards

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Description

Bendix has incorporated black oxide innerlayer surface treatment and dry nitrogen prepreg conditioning into the manufacturing process for multilayer PWBs. Before these changes, interlaminar adhesion was marginal and delaminations regularly occurred during solder dipping and leveling. Since the implementation of these changes, Bendix has not experienced any delaminated multilayer PWBs, and they may be immersed in molten solder for 2 minutes or more without visual damage. Both black oxide and red oxide innerlayer surface treatments have shown the capability to provide acceptable delamination resistance for multilayer PWBs made from FR-4 material. Optimum processing parameters for applying the oxide treatment have ... continued below

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Pages: 19

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Lula, J.W. March 1, 1980.

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Description

Bendix has incorporated black oxide innerlayer surface treatment and dry nitrogen prepreg conditioning into the manufacturing process for multilayer PWBs. Before these changes, interlaminar adhesion was marginal and delaminations regularly occurred during solder dipping and leveling. Since the implementation of these changes, Bendix has not experienced any delaminated multilayer PWBs, and they may be immersed in molten solder for 2 minutes or more without visual damage. Both black oxide and red oxide innerlayer surface treatments have shown the capability to provide acceptable delamination resistance for multilayer PWBs made from FR-4 material. Optimum processing parameters for applying the oxide treatment have been determined. In order to manufacture a multilayer PWB that will withstand solder dipping/leveling as well as subsequent drag soldering, its is necessary to remove absorbed moisture from the prepreg before lamination. Data have been gathered on the rate of moisutre removal from prepreg when dried and on the rate of moisture reabsorption when dried prepreg is exposed to 24/sup 0/C/50% RH environment.

Physical Description

Pages: 19

Notes

Dep. NTIS, PC A02/MF A01.

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  • Report No.: BDX-613-2413
  • Grant Number: EY-76-C-04-0613
  • DOI: 10.2172/5583045 | External Link
  • Office of Scientific & Technical Information Report Number: 5583045
  • Archival Resource Key: ark:/67531/metadc1093358

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

Office of Scientific and Technical Information (OSTI) is the Department of Energy (DOE) office that collects, preserves, and disseminates DOE-sponsored research and development (R&D) results that are the outcomes of R&D projects or other funded activities at DOE labs and facilities nationwide and grantees at universities and other institutions.

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Creation Date

  • March 1, 1980

Added to The UNT Digital Library

  • Feb. 10, 2018, 10:06 p.m.

Description Last Updated

  • June 1, 2018, 12:14 p.m.

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Lula, J.W. Improving delamination resistance of multilayer printed wiring boards, report, March 1, 1980; Kansas City, Missouri. (digital.library.unt.edu/ark:/67531/metadc1093358/: accessed December 17, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.