Patent ID: 7804030

Claim:
A printed circuit board ( 1 ) with a top face ( 2 ) for positioning an electronic component ( 3 ), with a bottom face ( 4 ) to support on a heat-dissipating base ( 5 ), with a plurality of heat transfer holes ( 12 ), which create a heat transfer from the top face ( 2 ) to the bottom face ( 4 ), wherein the heat transfer holes ( 12 ) are non-uniformly distributed on the top face ( 2 ) in such way that the top face ( 2 ) has several free sectors ( 14 ), which are free from heat transfer holes ( 12 ) in order to connect the electronic component ( 3 ) to the printed circuit board ( 1 ), characterized in that the free sectors ( 14 ) are each configured as a respective elongated free area having an elongated strip shape with two opposite longer sides extending parallel to an elongation direction and two opposite shorter sides extending transversely to the elongation direction, wherein the longer sides are longer than the shorter sides, and wherein a respective plurality of the heat transfer holes are positioned adjacent to each one of the longer sides and are spaced apart from one another in a respective row extending parallel to the elongation direction along each one of the longer sides of the elongated free areas, and wherein an in-row spacing distance between adjacent ones of the heat transfer holes in one of the rows is less than a transverse spacing distance between two of the rows that are respectively adjacent to the two opposite longer sides of one of the elongated free areas.