US 11,935,678 B2
Inductive devices and methods of fabricating inductive devices
Zishan Ali Syed Mohammed, Singapore (SG); Lulu Peng, Singapore (SG); Chor Shu Cheng, Singapore (SG); Yong Chau Ng, Singapore (SG); and Lawrence Selvaraj Susai, Singapore (SG)
Assigned to GLOBALFOUNDARIES SINGAPORE Pte. Ltd., Singapore (SG)
Filed by GLOBALFOUNDRIES Singapore Pte. Ltd., Singapore (SG)
Filed on Dec. 10, 2020, as Appl. No. 17/117,258.
Prior Publication US 2022/0189673 A1, Jun. 16, 2022
Int. Cl. H01F 27/28 (2006.01); H01F 17/00 (2006.01); H01F 27/02 (2006.01); H01L 49/02 (2006.01)
CPC H01F 17/0013 (2013.01) [H01F 27/022 (2013.01); H01F 27/28 (2013.01); H01L 28/10 (2013.01)] 16 Claims
OG exemplary drawing
 
1. An inductive device comprising:
a first winding layer;
a second winding layer arranged over the first winding layer and connected to the first winding layer to form a plurality of turns around a first axis; and
a magnetic core arranged vertically between the first winding layer and the second winding layer, wherein the magnetic core comprises a portion extending along the first axis, the portion entirely over the first winding layer and entirely under the second winding layer;
wherein the portion of the magnetic core comprises a first magnetic segment, a second magnetic segment and a non-magnetic,
wherein the non-magnetic segment is arranged laterally between the first magnetic segment and the second magnetic segment along the first axis,
wherein the non-magnetic segment separates the first magnetic segment from contacting the second magnetic segment,
wherein the non-magnetic segment includes a first side and a second side opposite the first side, the first side slanted at a first angle relative to the first axis, the second side slanted at a second angle relative to the first axis, the first side contacts the first magnetic segment and the second side contacts the second magnetic segment, and the non-magnetic segment has a tapered shape.