Patent ID: 8927872
Filing Date: 2015-01-06
Classification: H01L,H05K,Y10T

Abstract:
1. A thermal pad formed on a printed circuit board (PCB), the thermal pad comprising in its interior: a coin, wherein: i) the coin has a height equal to a thickness of the PCB, ii) the coin is made of metal or alloy, iii) the coin is inserted into a corresponding plated cutout straight through the PCB in the thermal pad, wherein the cutout is essentially the same size as the coin, and iv) the coin is bonded to side walls of the corresponding cutout with a paste capable of resisting a temperature of 250° C.; and a plurality of through vias, which are plated, and plugged with a solder mask, wherein the thermal pad has a flat top surface and a flat bottom surface, either of which is coplanar with a corresponding one of top and bottom surfaces of the PCB.