Electricity: electrical systems and devices – Electrostatic capacitors – Fixed capacitor
Patent
1981-01-12
1983-10-04
Tolin, G. P.
Electricity: electrical systems and devices
Electrostatic capacitors
Fixed capacitor
361383, 361424, 174 35MS, 343 18A, H05K 720
Patent
active
044082550
ABSTRACT:
An electromagnetic shield comprising two portions in which the first portion consists of a magnetically permeable mat with a conductive sheet bonded to one side and an insulating sheet bonded to the opposite side. In a typical application, this first portion is positioned with the insulating sheet making contact to the underside of a printed circuit board. The second portion consists of a magnetically permeable mat with a conductive sheet bonded to each side. The mat is porous and one of the conductive sheets contains a plurality of openings to permit cooling air which is forced through the pores of the mat to pass through these openings. The conductive sheet containing the plurality of openings is positioned adjacent the components on the upper side of a printed circuit board to provide cooling as well as closely positioned shielding.
REFERENCES:
patent: 3349397 (1967-10-01), Rosenthal
patent: 3526896 (1970-09-01), Wesch
patent: 3733606 (1973-05-01), Johansson
patent: 4012738 (1977-03-01), Wright
patent: 4029999 (1977-06-01), Neumann
patent: 4287243 (1981-09-01), Nielsen
Redmond Kevin
Tolin G. P.
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