Electrical circuit apparatus and methods for assembling same

A method for assembling an electrical circuit apparatus comprising a substrate having a top side, a ground layer, at least one thermal aperture, and at least one solder aperture, a heat sink, and an adhesive layer having at least one thermal aperture and at least one solder aperture, said method comprising the steps of:

• a) aligning the at least one substrate solder aperture with the at least one adhesive layer solder aperture and aligning the at least one substrate thermal aperture with the at least one adhesive layer thermal aperture;
• b) mechanically coupling said heat sink to the ground layer of said substrate using said adhesive layer such that at least a portion of said at least one substrate thermal aperture overlaps said heat sink;
• c) filling at least a portion of said at least one adhesive layer solder aperture and at least a portion of said at least one substrate thermal aperture with solder;
• and
• d) performing a process for solder wetting, wherein the aligning of the at least one substrate solder aperture with the at least one adhesive layer solder aperture and the aligning of the at least one substrate thermal aperture with the at least one adhesive layer thermal aperture causes said solder to flow from the at least one adhesive layer solder aperture to a predetermined area between said heat sink and the ground layer of said substrate.