Patent ID: 11895775
Assignee: UNIVERSITY OF MARYLAND, COLLEGE PARK
Field: Audio-visual technology (Electrical engineering)
Classification: CPC H | IPC H

Claim 30:
31. A method for fabrication of a hybrid double-sided power switch module, comprising:
forming a first printed circuit board (PCB) and a second PCB, wherein said PCB has a first side and a second side opposite to said first side, and wherein said second PCB has a third side and a fourth side opposite to said third side, and
configuring each of said first and second PCB s with at least one respective through-hole-via (THV) extending between said first and second sides of said first PCB and between said third and fourth sides of said second PCB;
securing at least one first switch die to said first side of said first PCB with a gate terminal of said at least first switch die facing said first side of said first PCB in alignment with said at least one THV formed through said first PBC, and
soldering at least one first spring pin inside said at least one THV formed through said first PCB by a high-temperature solder paste, said at least one first spring pin having a first conductive body with a first cap formed at one end of said first conductive body and a second cap formed at another end of said first conductive body, wherein said at least one first spring pin has said first cap aligned and in contact with said gate terminal of said at least one first switch die, and wherein said second cap is exposed at said second side of said first PCB in alignment and contact with said at least one THV formed through said first PCB;
securing at least one second switch die to said third side of said second PCB with a gate terminal of said at least one second switch die facing said third side of said second PCB in alignment with said at least one THV formed through said second PCB, and
soldering at least one second spring pin inside said at least one THV formed through said second PCB by said high-temperature solder paste, said at least one second spring pin having a second conductive body with a third cap formed at one end of said second conductive body and a fourth cap formed at another end of said second conductive body, wherein said at least one second spring pin has said third cap aligned and in contact with said gate terminal, and wherein said fourth cap is exposed at said fourth side of said second PCB in alignment and in contact with said at least one THV formed through said second PCB; and
securing said first and second PCBs to one another by a low-temperature solder paste with said second and fourth sides thereof facing each other, thus forming a double PCB assembly with said at least first and second switch dies secured at said first and third sides and interconnected to configure the power switch module configuration.