US 11,948,721 B2
Packaged isolation barrier with integrated magnetics
Ying-Chuan Kao, Taipei (TW); Hung-Yu Chou, Taipei (TW); Dong-Ren Peng, New Taipei (TW); Jun Jie Kuo, New Taipei (TW); Kenji Otake, Nagano (JP); and Chih-Chien Ho, New Taipei (TW)
Assigned to TEXAS INSTRUMENTS INCORPORATED, Dallas, TX (US)
Filed by TEXAS INSTRUMENTS INCORPORATED, Dallas, TX (US)
Filed on May 26, 2020, as Appl. No. 16/883,614.
Prior Publication US 2021/0375525 A1, Dec. 2, 2021
Int. Cl. H01F 27/28 (2006.01); H01F 19/08 (2006.01); H01L 23/64 (2006.01); H01L 49/02 (2006.01)
CPC H01F 27/2804 (2013.01) [H01L 23/645 (2013.01); H01L 28/10 (2013.01); H01F 2019/085 (2013.01); H01F 2027/2809 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An apparatus comprising:
a laminate including:
a dielectric layer having a first surface and a second surface opposed to the first surface;
a first conductive layer forming a circuit element overlying the first surface of the dielectric layer; and
a second conductive layer overlying the second surface of the dielectric layer;
a patterned first magnetic layer over the first conductive layer;
a second magnetic layer over the second conductive layer;
wherein a first edge surface of the patterned first magnetic layer is coplanar with a first edge surface of the laminate; and
wherein a second edge surface of the patterned first magnetic layer is coplanar with a second edge surface of the laminate;
wherein a first edge surface of the second magnetic layer is coplanar with the first edge surface of the laminate;
wherein a second edge surface of the second magnetic layer is coplanar with the second edge surface of the laminate;
wherein the circuit element includes a first transformer coil overlying the first surface of the dielectric layer;
wherein the second conductive layer forms a second transformer coil overlying the second surface of the dielectric layer; and
wherein the laminate further includes a third conductive layer forming an electromagnetic interference (EMI) shield between and isolated from the first conductive layer and the second conductive layer.