Electricity: electrical systems and devices – Housing or mounting assemblies with diverse electrical... – For electronic systems and devices
Patent
1993-03-31
1994-06-21
Picard, Leo P.
Electricity: electrical systems and devices
Housing or mounting assemblies with diverse electrical...
For electronic systems and devices
174 35R, 174 35GC, H05K 900
Patent
active
053232992
ABSTRACT:
An EMI internal shield made of an electrically conductive material that absorbs and reflects electromagnetic interference (EMI) signals associated to fit with an EMI shield top cover. The EMI internal shield is formed to fit without solder or welding as an EMI shield apparatus over EMI susceptible electronic circuitry on a printed circuit board. The EMI internal shield apparatus not only shields circuitry from EMI sources external to the printed circuit board, but also isolates certain electronic circuits from other electronic circuitry on the printed circuit board. Additionally, the EMI internal shield permits the communication of desired electromagnetic radio frequency and electrical signals to the circuitry inside the shield. The EMI internal shield apparatus includes the use of an electrically conductive layer that is integral to the top of the printed circuit board and which includes conductive channels that penetrate the printed circuit board. The channels prevent EMI from passing through the printed circuit board to the shielded electronic circuits. Also, the channels receive tangs found on the EMI internal shield. The tangs are positioned to prevent EMI from passing through the juncture of the EMI internal shield with the conductive layer. As EMI signals reach the EMI internal shield, they are absorbed and conducted to an electrical ground or reflected from the EMI internal shield. Signal trace openings through the conductive layer permit electrical leads from the electronic circuitry to connect to external circuitry.
REFERENCES:
patent: 3816911 (1974-06-01), Knappenberger
patent: 4370515 (1983-01-01), Donaldson
patent: 4494095 (1985-01-01), Noji et al.
patent: 4583150 (1986-04-01), Boonstra
patent: 4661888 (1987-04-01), Jewell et al.
patent: 4754101 (1988-06-01), Stickney et al.
patent: 4800464 (1989-01-01), Roos et al.
patent: 5014160 (1991-05-01), McCoy, Jr.
patent: 5053924 (1991-10-01), Kurgan
patent: 5067232 (1991-11-01), Seidel et al.
patent: 5107404 (1992-04-01), Tam
patent: 5160807 (1992-11-01), Fry et al.
Alcatel Network Systems, Inc.
Picard Leo P.
Sparks Donald A.
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