Patent ID: 8981869
Filing Date: 2015-03-17
Classification: H01Q,H03H,H05K,Y10T

Abstract:
1. A method of manufacturing a multilayer printed circuit board assembly provided from a plurality of printed circuit boards, the method comprising the unordered steps of: bonding together a plurality of printed circuit boards to form a bonded printed circuit board assembly having first and second opposing outer surfaces with at least a first one of the plurality of printed circuit boards having a first circuit on a layer thereof and at least a second different one of the plurality of printed circuit boards having a second circuit on a layer thereof; drilling a plurality of holes which extend through the first and second opposing outer surfaces of the bonded printed circuit board assembly with one of the holes intersecting both the first and second circuits in the bonded printed circuit board assembly; plating each of the plurality of holes to form a plurality of conductive via holes and wherein the conductive via hole which intersects both the first and second circuits corresponds to an RF interconnect between the first and second circuits and wherein the RF interconnect has at least one stub portion; and forming an RF matching pad on at least one layer of at least one of said plurality of printed circuit boards such that the RF matching pad is electrically coupled to the RF interconnect so as to adjust an impedance characteristic of the RF interconnect; and wherein forming an RF matching pad comprises forming a disk-shaped RF matching pad by providing a conductor having a disk shape on the at least one layer of at least one of said plurality of printed circuit boards, such that the disk-shaped conductor is electrically coupled to the RF interconnect and wherein the size of the disk-shaped conductor is selected to adjust an impedance characteristic of the RF interconnect.