Electricity: conductors and insulators – Anti-inductive structures – Conductor transposition
Patent
1995-05-12
1997-01-28
Ledynh, Bot L.
Electricity: conductors and insulators
Anti-inductive structures
Conductor transposition
174 35MS, H05K 900
Patent
active
055979793
ABSTRACT:
An electronic device is shielded against electromagnetic interference using a flexible conductive sheet forming a shield barrier or enclosure. The sheet has electrically insulating polymer material exposed on the surface of at least one face. Conductive material is embedded in or laminated on the sheet so as to be exposed selectively. More particularly, a nonconductive surface area is formed, especially oriented inwardly to avoid electrical shorts, but also exposed inwardly or outwardly where necessary to ground the shield barrier or to engage with another conductive body. The flexible sheet can form a loose envelope with a flange-like gasket at an open end. The gasket can be used to improve physical contact with a conductive body, and preferably also admits I/O connectors that need to traverse the shield barrier, and advantageously have external shielding that is grounded to the shielding barrier for continuing the shielding enclosure. Alternatively or additionally, openings are provided in the sheet for access, the conductive material being insulated around a perimeter or the openings by insulating lips which prevent unwanted shorting. This permits changing or adding circuit chips without removing the shield, and can be provided with a flap closure for minimizing the gap in the shield. The flexible envelope can be joined to a circuit ground by clamping the gasket or the conductive fibers on an exposed face to a the I/O connector, to a common ground, or to an external grounded panel.
REFERENCES:
patent: 2875435 (1959-02-01), McMillian
patent: 2913577 (1959-11-01), Johnson
patent: 3383455 (1968-05-01), Kerley, Jr.
patent: 3436467 (1969-04-01), Smith, Jr.
patent: 3572499 (1971-03-01), Mondano
patent: 3622432 (1971-11-01), McCluer
patent: 3731202 (1973-05-01), Meyers
patent: 3756399 (1973-09-01), Cosier et al.
patent: 4037009 (1977-07-01), Severinsen
patent: 4227037 (1980-10-01), Layton
patent: 4471015 (1984-09-01), Ebneth et al.
patent: 4631214 (1986-12-01), Hasegawa
patent: 4647714 (1987-03-01), Goto
patent: 4654755 (1987-02-01), Henderson et al.
patent: 4658958 (1987-04-01), McNulty et al.
patent: 4678699 (1987-07-01), Kritchevsuy et al.
patent: 4750957 (1988-06-01), Gustafson
patent: 4774148 (1988-09-01), Goto
patent: 4785136 (1988-11-01), Mollet et al.
patent: 4863789 (1989-09-01), Arai
patent: 4896001 (1990-01-01), Pitts et al.
patent: 5005106 (1991-04-01), Kiku
patent: 5008486 (1991-04-01), Terakawa et al.
patent: 5023394 (1991-06-01), Watanabe et al.
patent: 5031076 (1991-07-01), Kiku
patent: 5115140 (1992-05-01), Rodriguez
patent: 5134245 (1992-07-01), Katz
patent: 5136119 (1992-08-01), Leyland
patent: 5137782 (1992-08-01), Adriaensen et al.
patent: 5164542 (1992-11-01), Hart
patent: 5166864 (1992-11-01), Chitwood et al.
patent: 5170009 (1992-12-01), Kadokura
patent: 5198290 (1993-03-01), Niioka
patent: 5226210 (1993-07-01), Koskenmaki et al.
patent: 5239125 (1993-08-01), Savage et al.
patent: 5270493 (1993-12-01), Inoue et al.
patent: 5394304 (1995-02-01), Jones
patent: 5436803 (1995-07-01), Annis et al.
Courtney Daniel T.
Hermann Kenneth W.
Miska Stanley R.
Ledynh Bot L.
Schlegel Corporation
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