Electricity: conductors and insulators – Conduits – cables or conductors – Preformed panel circuit arrangement
Patent
1995-09-29
1997-06-24
Thomas, Laura
Electricity: conductors and insulators
Conduits, cables or conductors
Preformed panel circuit arrangement
174254, 174260, 361761, H05K 102
Patent
active
056419449
ABSTRACT:
A multilayer circuit board or laminated circuit board for use in a motor controller is described. The multilayer circuit board is preferably utilized as a power substrate module. The power substrate module includes a mounting area provided in a recess, window or portion of the circuit board where the circuit board is only a single layer thick. The insulated mounting area is provided in a blind via in the multilayer circuit board. The single circuit board layer at the mounting area provides a heat conductive yet highly electrically insulated mounting area for receiving a heat sink. The heat sink can be mounted on a side opposite the electrical device. The heat sink may be standard heat sink or a copper coil directly soldered to the circuit board. The multilayer circuit board includes an enhanced conductive layer for receiving the surface mount device. The enhanced conductive layer preferably includes an insulative frame which holds copper slugs. The layers are advantageously thermally matched such that heat generated during operation is evenly dissipated by the mounting area and causes uniform expansion of all layers.
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Babinski Thomas E.
Mather John C.
Wieloch Christopher J.
Allen-Bradley Company Inc.
Horn John J.
Miller John M.
Thomas Laura
Ziebert Joseph N.
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