US 11,967,446 B2
Packaging structure of a magnetic device
Chun-Tiao Liu, Hsinchu (TW); Lan-Chin Hsieh, Kaohsiung (TW); Tsung-Chan Wu, Hsinchu County (TW); Chi-Hsun Lee, Taipei (TW); and Chih-Siang Chuang, Hsinchu (TW)
Assigned to CYNTEC CO., LTD., Hsinchu (TW)
Filed by CYNTEC CO., LTD., Hsinchu (TW)
Filed on Jan. 4, 2021, as Appl. No. 17/140,143.
Application 17/140,143 is a continuation of application No. 15/935,067, filed on Mar. 26, 2018, granted, now 10,902,989.
Application 15/935,067 is a continuation of application No. 14/941,647, filed on Nov. 15, 2015, granted, now 9,959,965, issued on May 1, 2018.
Application 14/941,647 is a continuation of application No. 14/251,105, filed on Apr. 11, 2014, granted, now 9,230,728, issued on Jan. 5, 2016.
Application 14/251,105 is a continuation of application No. 13/738,674, filed on Jan. 10, 2013, granted, now 8,723,629, issued on May 13, 2014.
Prior Publication US 2021/0125767 A1, Apr. 29, 2021
This patent is subject to a terminal disclaimer.
Int. Cl. H01F 27/25 (2006.01); H01F 1/147 (2006.01); H01F 17/04 (2006.01); H01F 27/02 (2006.01); H01F 27/255 (2006.01); H01F 27/28 (2006.01); H01F 27/29 (2006.01)
CPC H01F 27/022 (2013.01) [H01F 1/14741 (2013.01); H01F 1/14766 (2013.01); H01F 1/14791 (2013.01); H01F 17/045 (2013.01); H01F 27/255 (2013.01); H01F 27/2828 (2013.01); H01F 27/29 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A magnetic device, comprising:
a T-shaped magnetic core, comprising a magnetic powder, wherein the T-shaped magnetic core comprises a base and a pillar, wherein the base comprises a top surface and a bottom surface opposite to the top surface, and the pillar is located on the top surface of the base;
a coil, wound on the pillar; and
a magnetic body, encapsulating the pillar and the coil, wherein the magnetic body and the bottom surface of the base form an outer surface of the magnetic device, wherein the magnetic body does not have any portion that is located below the bottom surface of the base of the T-shaped magnetic core, wherein a first portion of the magnetic body extending in a direction from the top surface to the bottom surface of the base of the T-shaped magnetic core is in contact with a first lateral surface of the base of the T-shaped magnetic, wherein an electrode is disposed on the bottom surface of the base of the T-shaped magnetic core and extends to a bottom surface of the first portion of the magnetic body, wherein a unitary and contiguous top surface of the electrode is in contact with a contiguous surface formed by the bottom surface of the base of the T-shaped magnetic core and the bottom surface of the first portion of the magnetic body;
wherein μC×Hsat(Oe)≥1800, where μC is a permeability of the T-shaped magnetic core, and Hsat(Oe) is a strength of the magnetic field at 80% of μC0, where μC0 is the permeability of the T-shaped magnetic core when the strength of the magnetic field is 0.