Patent ID: 8665596

Claim:
Power switching circuitry for generating an output power supply from a source power supply, comprising: a heat absorbing structure; a heat conductive substrate having power switching components provided on a first surface, and having a second surface adjacent the heat absorbing structure; a plurality of electrically conductive members located on said first surface of the heat conductive substrate, each electrically conductive member extending along a first axis orthogonal to the heat conductive substrate and comprising a first portion and a second portion, the second portion being more remote from the heat conductive substrate than the first portion and having a smaller cross-sectional area than the cross-sectional area of the first portion in order to define a shoulder region orthogonal to the first axis; a circuit board, the second portion of each electrically conductive member extending through the circuit board such that the circuit board is located on the shoulder region of each electrically conductive member; and an urging mechanism configured to urge the circuit board against the shoulder region of each electrically conductive member, whereby the plurality of electrically conductive members provide a current path between the heat conductive substrate and the circuit board, and urge the heat conductive substrate into thermal contact with the heat absorbing structure.