Electricity: electrical systems and devices – Miscellaneous
Patent
1983-07-18
1986-08-05
Kucia, R. R.
Electricity: electrical systems and devices
Miscellaneous
174 685, 361406, 361407, H05K 118
Patent
active
046046780
ABSTRACT:
An improved circuit board having electrically conductive traces connected to respective terminals of a number of electrically current components mounted on a substrate. The substrate has cavities for mounting the components, and a plurality of grooves extend into one or both of a pair of opposed surfaces of the substrate. The grooves are filled by plating with an electrically conductive material to form the traces. Thus, the traces not only extend in the plane of a surface of the substrate but also extend perpendicular to such plane and into the substrate itself whereby a high packing density of traces can be achieved while maintaining essentially electrical paths between the components. The depth of each trace is a number of times greater than the width of the trace, a typical ratio being 10:1. The substrate can be molded from a plateable plastic or ceramic material and the grooves can be machined by a laser beam. The components are assembled before the grooves are plated to minimize production costs and to assure immediate electrical connection between the tracers and the terminals of respective components.
REFERENCES:
patent: 3281627 (1966-10-01), Fetterrolf et al.
patent: 3670205 (1972-06-01), Dixon et al.
patent: 3934336 (1976-01-01), Morse
patent: 4328530 (1982-05-01), Bajorek et al.
patent: 4374457 (1983-02-01), Wiech, Jr.
George H. Stredde, Printed Circuit Board Bus Bars, Western Electric Eng., vol. 23, #1, Jan. 1979, pp. 18 & 20 to 23.
Ho et al, Multiple LSI Silicon Chip Modules with Power Busses Composed of Laminated Silicon Sheets with Metallized Upper and Lower Surfaces, IBM Tech. Disc. Bull., vol. 22, #8A, Jan. 1980, pp. 3410 & 11.
Basma T.
Kucia R. R.
Parker Frederick
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