US 11,751,330 B2
Magnetic material filled printed circuit boards and printed circuit board stators
George Harder Milheim, Bozeman, MT (US); Steven Robert Shaw, Bozeman, MT (US); Ryan Terrence Duffy, Lowell, MA (US); and Edward Charles Carignan, Goffstown, NH (US)
Assigned to E-Circuit Motors, Inc., Needham Heights, MA (US)
Filed by E-Circuit Motors, Inc., Newton, MA (US)
Filed on Jul. 27, 2022, as Appl. No. 17/874,369.
Claims priority of provisional application 63/227,644, filed on Jul. 30, 2021.
Prior Publication US 2023/0036536 A1, Feb. 2, 2023
Int. Cl. H05K 1/03 (2006.01); H05K 1/16 (2006.01); H05K 3/10 (2006.01)
CPC H05K 1/0373 (2013.01) [H05K 1/165 (2013.01); H05K 3/10 (2013.01); H05K 2201/0137 (2013.01); H05K 2201/086 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A planar armature for an axial flux machine, the planar armature comprising:
a first layer comprising a first dielectric substrate;
a second layer comprising a second dielectric substrate; and
a third layer disposed between the first layer and the second layer, wherein the third layer comprises:
first conductive traces that form at least first portions of windings for at least a first pole of the planar armature,
a first quantity of a magnetic composite material disposed in interstices between the first conductive traces within at least a first region of the third layer, wherein the magnetic composite material comprises particles of a soft magnetic material embedded within a first dielectric material and the first region is located within an active area of the axial flux machine, and
a second quantity of a second dielectric material disposed within at least a second region of the third layer, wherein the second dielectric material is free of the soft magnetic material and the second region is located outside of the active area.