US 12,080,464 B2
Laminated transformer and manufacturing method thereof
Ke Dai, Hangzhou (CN); Jian Wei, Hangzhou (CN); and Jiajia Yan, Hangzhou (CN)
Assigned to Silergy Semiconductor Technology (Hangzhou) LTD, Hangzhou (CN)
Filed by Silergy Semiconductor Technology (Hangzhou) LTD, Hangzhou (CN)
Filed on Dec. 18, 2019, as Appl. No. 16/719,709.
Claims priority of application No. 201811641032.4 (CN), filed on Dec. 29, 2018.
Prior Publication US 2020/0211759 A1, Jul. 2, 2020
Int. Cl. H01F 27/28 (2006.01); H01F 27/24 (2006.01); H01F 27/32 (2006.01)
CPC H01F 27/2804 (2013.01) [H01F 27/24 (2013.01); H01F 27/323 (2013.01); H01F 2027/2809 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A laminated transformer, comprising:
a) a first magnetic layer and a second magnetic layer;
b) a plurality of winding layers, each winding layer comprising a magnetic material body and a coil layer cladded by the magnetic material body, wherein the plurality of winding layers comprise a primary winding having a first type of winding layers, and a secondary winding having a second type of winding layers, wherein the plurality of winding layers is laminated in sequence between the first magnetic layer and the second magnetic layer, wherein the magnetic material body and the coil layer of each winding layer have a same thickness; and
c) a plurality of non-magnetic layers, wherein a first of the plurality of non-magnetic layers is disposed between adjacent layers of one of the first type of winding layers and one of the second type of winding layers, in order to increase a coupling coefficient between the primary and secondary windings, and wherein each non-magnetic layer and each winding layer fully overlap in a lamination direction.