Electricity: conductors and insulators – Conduits – cables or conductors – Preformed panel circuit arrangement
Patent
1994-03-23
1995-09-19
Picard, Leo P.
Electricity: conductors and insulators
Conduits, cables or conductors
Preformed panel circuit arrangement
174252, 174257, 174262, 174263, 174266, H05K 100
Patent
active
054517206
ABSTRACT:
A circuit board having a thermal relief pattern for isolating heat generated during soldering of components thereon. The circuit board comprises (1) a substantially planar insulating substrate, the substrate having a via therethrough and (2) a substantially planar conductive layer located over the substrate, the via passing through the layer, the layer having a thermal relief pattern comprising a plurality of apertures located about the via, the plurality of apertures cooperating to restrict heat flow across the thermal relief pattern, each of the plurality of apertures having a boundary with the conductive layer free of discontinuities to inhibit edge effect electromagnetic resonance, the plurality of apertures defining a plurality of corresponding conductive bands in the conductive layer and between the plurality of apertures, the conductive bands cooperating to provide a predetermined minimum level of electrical conduction across the thermal relief pattern.
REFERENCES:
patent: 5264664 (1993-11-01), McAllista et al.
patent: 5326937 (1954-07-01), Watanabe
Estes H. Scott
Staggs David
Swamy Deepak
Dell USA L.P.
Figlin Cheryl R.
Hitt David
Huffman James
Picard Leo P.
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