Patent ID: 6157544
Filing Date: 2000-12-05
Classification: H01L,H01Q,H05K

Abstract:
A circuit arrangement for minimizing the effects of operating circuit components at high frequencies, comprising:a) a circuit carrier (1) dimensioned for receipt of components (5) positioned thereon;b) a first large area layer (3) positioned above the components in juxtaposed spaced relationship to the circuit carrier (1) for absorbing high frequency electromagnetic waves generated by one or more of the components positioned on the circuit carrier;c) a second large area layer (4) positioned below the circuit carrier (1) for absorbing high frequency electromagnetic waves generated by any of the components; andd) a casing (6) positioned around the first large area layer and second large area layer for encapsulating said layers and the circuit carrier and components positioned thereon;wherein the first layer is made from a material which absorbs high frequency electromagnetic waves such as silicon or epoxy resin filled with iron powder or carbon and further wherein the second large area layer is made from a material which absorbs high frequency electromagnetic waves such as silicon of average conductivity.