Low-bridging soldering process

Metal fusion bonding – Process – With protecting of work or filler or applying flux

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228219, 228223, B23K 100

Patent

active

053908457

ABSTRACT:
A process for wave soldering or reflow soldering comprises contacting substrates with a supply of molten solder containing from about 0.0001 to about 0.1% by weight of phosphorous in an atmosphere of diluent gas containing up to about 0.1% by volume oxygen. A reduced incidence of bridging and other soldering defects occurs.

REFERENCES:
patent: 3811177 (1974-05-01), Schoer et al.
patent: 4373974 (1983-02-01), Barajas
patent: 4504007 (1985-03-01), Anderson, Jr. et al.
patent: 4610391 (1986-09-01), Nowotarski
patent: 5071058 (1991-12-01), Nowotarski
patent: 5076487 (1991-12-01), Bandyopadhyay et al.
patent: 5240169 (1993-08-01), Gileta
"Wettability of Liquid Tin On Solid Copper" by Kawakatsu & Osawa, Transactions of the JIM vol. 14, 1973, pp. 114-119.
"Oxidation And Drossing Of Molten Solders: Effects of Impurities" by Stoneman et al., Metals Technology, Jun. 1980, pp. 226-231.
"Copper Phosphorous Brazing Filler Alloys With Low Melting Temperature (Report 1)-Effect of Tin Addition" by Okamoto et al., Transactions of JWRI, vol. 10, No. 1, 1981, pp. 47-53.
"Solder Contamination-Cause and Effect" by C. Mackay, Technical Paper Presented at IPC Fall Meeting Sep. 1981.
"New Developments In Direct-Free Soldering" and soldering product information by Federated Fry Metals Co.
"Viscosity of Tin/Lead Solder", Fry Report No. 89-V11, by Federated-Fry Metals Co.
"Joining Chip To Substrate In Oxygen-Containing Atmosphere" by Brunner et al., IBM Technical Disclosure Bulletin, vol. 20, No. 6, Nov. 1977, p. 2318.
"Solders And Their Future Use" in Tin And Its Uses, Issue 135 (1983) p. 5.
"Effects of Impurities On Wetting And Drossing of Solder", Tin And Its Uses, Issue 135, (1983), p. 4.
"The Soldering Process", Tin And Its Uses Issue 136, (1983) p. 9.
"New Products", Electronic Chemical News, Feb. 15, 1992, p. 6.

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