Metal working – Method of mechanical manufacture – Electrical device making
Patent
1988-03-31
1989-10-03
Eley, Timothy V.
Metal working
Method of mechanical manufacture
Electrical device making
29852, 427 431, 427 541, 430315, 430417, H05K 302, H05K 310
Patent
active
048707511
ABSTRACT:
A method of manufacturing printed circuit boards. An environmentally safe method for manufactured printed circuit boards using additive technology provides a simple and exact transfer of conductor patterns. The novel method provides a selective ablation of a nucleation, B, applied to a substrate either by itself or together with a thin base layer, G, applied by chemical metal deposition. This ablation is done by electromagnetic radiation preferably with an excimer laser in those regions of the substrate that do not correspond to the conductor tracks and/or interlayer connections or through-connections to be formed later. Conductor material is subsequently built up by chemical and/or galvanic metal deposition.
REFERENCES:
patent: 4085285 (1978-04-01), Lippits et al.
patent: 4668532 (1987-05-01), Moisan et al.
Article entitled "Kunstostoffe in der Elecktrotechnik", AEG-TELEFUNKEN Handbucher, vol. 22, 1979, pp. 36 and 37.
Article entitled "Laser-Bildubertragung", a German periodical Glavanotechnik 77, 1986, No. 1, pp. 51-60.
Article entitled "Selective Electroless Plating by Selective Deactivation", an RCA review, vol. 31, Jun. 1970, pp. 439-442.
Eley Timothy V.
Siemens Aktiengesellschaft
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