Stock material or miscellaneous articles – Structurally defined web or sheet – Discontinuous or differential coating – impregnation or bond
Patent
1994-09-20
1996-01-16
Ryan, Patrick J.
Stock material or miscellaneous articles
Structurally defined web or sheet
Discontinuous or differential coating, impregnation or bond
428901, 4283202, 4283213, 361748, 361750, B32B 900
Patent
active
054846471
ABSTRACT:
A connecting member of circuit substrates includes an organic porous base material provided with tackfree films on both sides, through-holes disposed at requested places which are filled with conductive resin compound up to the surface of the tackfree films. This structure enables inner-via-hole connection and can therefore attain a connecting member of circuit substrates and an electrical connector of high reliability and high quality.
By using a connecting member of circuit substrates including the organic porous base material provided with tackfree films on both sides and through-holes disposed at requested places which are filled with conductive resin compound up to the surface of the tackfree films, it is possible to form a high-multilayer substrate easily from double sided boards or four-layer substrates which can be manufactured rather stably. In addition to that, since the conductive paste is filled up to the surface of the tackfree films, the conductive paste sticks out from the surface of the organic porous base material when the tackfree-films are separated. As a result, the filled amount of the conductive substance increases after the lamination, and thus, the connection resistance is reduced considerably.
REFERENCES:
patent: 5346750 (1994-09-01), Hatakeyama
Patent Abstracts of Japan, vol. 13, No. 230 (May 26, 1989).
Patent Abstracts of Japan, vol. 15, No. 506 ((Dec. 20, 1991).
Patent Abstracts of Japan, vol. 17, No. 583 (Oct. 22, 1993).
Patent Abstracts of Japan, vol. 13, No. 413 (Sep. 12, 1989).
Hatakeyama Akihito
Kawakita Kouji
Kojima Tamao
Nakatani Seiichi
Ogawa Tatsuo
Jewik Patrick
Matsushita Electric - Industrial Co., Ltd.
Ryan Patrick J.
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