Metal working – Method of mechanical manufacture – Electrical device making
Patent
1989-10-02
1991-06-25
Arbes, Carl J.
Metal working
Method of mechanical manufacture
Electrical device making
29739, 29845, 29846, H01K 310
Patent
active
050255533
ABSTRACT:
Electrically conductive patterns on opposite sides of a printed circuit board are connected by way of through holes formed in the board. A plug formed of fusible material such as solder and having an electrically conductive coating is located in the or each hole. The plug is upset to expand it so that the electrically conductive coating contacts the wall of the hole. Solder is applied to opposite ends of the plug to bridge any gap between the conductive pattern and the conductive coating. The body of the plug may then be removed by a desoldering step.
REFERENCES:
patent: 4183137 (1980-01-01), Lomerson
patent: 4562301 (1985-12-01), Kameda et al.
patent: 4644643 (1987-02-01), Sudo
IBM Technical Disclosure Bulletin, vol. 11, No. 8, Jan. 1969, p. 992, Armonk, N.Y., U.S.; T. L. Ellis: "Injected Interconnections".
IBM Technical Disclosure Bulletin, vol. 12, No. 4, Sep. 1969, p. 596, Armonk, N.Y., U.S.; F. W. Eurglunes: "Via Hole Filling Technique".
Machine Design, vol. 46, No. 27, Nov. 14, 1974, p. 82, Cleveland, U.S.; "Lead Alloy Preforms Speed up Assembly Operations".
Technique Rundschau, vol. 64, No. 5, Feb. 4, 1972, pp. 39-43, Bern, CH; "Loten von Kupfer und Kupferlegierungen".
IBM Tech Disclosure Bulletin, vol. 8, No. 11, Apr. 1966, p. 1494 by Byrnes.
IBM Tech Disclosure Bulletin, vol. 15, No. 8, Jan. 1973, p. 2492 by Avg.
Engineering Design News, Feb. 1963, pp. 118-119.
Arbes Carl J.
Telco International, Ltd.
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