Divided active electromagnetic interference filter module and manufacturing method thereof

Patent metadata

Field	Value
Publication number	US-12470189-B2
Application number	US-202418423375-A
Country	US
Kind code	B2
Filing date	Jan 26, 2024
Priority date	Mar 28, 2019
Publication date	Nov 11, 2025
Grant date	Nov 11, 2025

Abstract

This application relates to an independent active electromagnetic interference filter module. In one aspect, the filter module includes a first element group including a noise sensing unit provided to sense electromagnetic noise, and a second element group including a compensating unit provided to generate a compensation signal for the electromagnetic noise. The first group and the second group may be respectively mounted on different substrates. According to some embodiments, the filter module can reduce a volume of each element constituting an electromagnetic interference filter module, implement a single modularization of a compact structure. The filter module can also improve electromagnetic interference noise reduction performance and a manufacturing method thereof.

First claim

What is claimed is:

1 . An independent active electromagnetic interference filter module comprising:
a substrate including a first surface and a second surface opposite to each other; a first element group installed on at least one of the first surface or the second surface and provided to detect electromagnetic noise; a second element group installed on at least one of the first surface or the second surface and provided to generate a compensation signal for the electromagnetic noise; an encapsulation structure provided to separate the substrate, the first element group and the second element group from an outside, the encapsulation structure including a space located therein, an opening connected to the space, and a support comprising a bottom surface and side surfaces connected to the bottom surface, and the support being configured to accommodate at least one of the substrate, the first element group, and the second element group in the space; a first pin group exposed to an outside of the encapsulation structure and electrically connected to at least a portion of the first element group or the second element group; and a second pin group exposed to the outside of the encapsulation structure and electrically connected to at least a portion of the first element group or the second element group.

2 . The independent active electromagnetic interference filter module of claim 1 , wherein the encapsulation structure further comprises a filling part provided to fill at least a part of the space.

3 . The independent active electromagnetic interference filter module of claim 2 , wherein at least some of the first pin group and the second pin group is provided to be exposed to the outside of the support through the opening.

4 . The independent active electromagnetic interference filter module of claim 2 , wherein the filling part is provided to close the opening.

5 . The independent active electromagnetic interference filter module of claim 2 , wherein the filling part comprises:
a first filling part facing the first surface; and a second filling part facing the second surface.

6 . The independent active electromagnetic interference filter module of claim 1 , wherein the support is formed of a thermally transferable material.

7 . The independent active electromagnetic interference filter module of claim 1 , wherein a heat dissipation mechanism is further provided on the support.

8 . The independent active electromagnetic interference filter module of claim 1 , wherein an edge of the substrate is in close contact with at least one side surface of the space.

9 . The independent active electromagnetic interference filter module of claim 1 , wherein:
the first surface of the substrate is disposed to face a bottom of the support, and the second surface of the substrate is disposed to face an opening of the support; and a distance between the bottom of the support and the first surface of the substrate is greater than a distance between the opening of the support and the second surface of the substrate.

10 . The independent active electromagnetic interference filter module of claim 1 , wherein:
the first element group includes at least a sensor; the second element group includes at least one of a compensator and an active circuit; and the sensor and the compensator are disposed on the first surface of the substrate; and the active circuit is disposed on the second surface of the substrate.

11 . A manufacturing method of an independent active electromagnetic interference filter module comprising:
installing a first element group provided to detect an electromagnetic noise on at least one of a first surface and a second surface of a substrate including the first surface and the second surface facing each other; installing a second element group provided to generate a compensation signal for the electromagnetic noise on at least one of the first surface and the second surface; and forming an encapsulation structure separating the substrate, the first element group and the second element group from an outside and provided to expose a first pin group electrically connected to the first element group and a second pin group electrically connected to the second element group to the outside, respectively, wherein forming the encapsulation structure comprises: preparing a support comprising a bottom surface and side surfaces connected to the bottom surface, and including a space located therein and an opening connected to the space; and accommodating at least one of the substrate, a first element group, and a second element group in the space.

12 . A manufacturing method of an independent active electromagnetic interference filter module of claim 11 , wherein forming the encapsulation structure further comprises forming a filling part provided to fill at least a part of the space.

13 . A manufacturing method of an independent active electromagnetic interference filter module of claim 12 , wherein forming the encapsulation structure further comprises:
exposing at least a portion of the first pin group and the second pin group to the outside of the support through the opening.

14 . A manufacturing method of an independent active electromagnetic interference filter module of claim 12 , wherein forming the filling part further comprises:
closing the opening using the filling part.

15 . A manufacturing method of an independent active electromagnetic interference filter module of claim 12 , wherein forming the filling part comprises:
forming a first filling part facing the first surface and forming a second filling part facing the second surface.

Assignees

• Em Coretech Inc
• Ulsan Nat Inst Science & Tech Unist

Inventors

• Kim Jin Gook
• Jeong Sang Yeong

Classifications

• H03H7/427

  Common-mode filters (H02J3/01 and H02M1/126 takes precedence) · CPC title

• H05K1/14

  Structural association of two or more printed circuits (providing electric connection to or between printed circuits H05K1/11, H01R12/00) · CPC title

• H05K2201/1006

  Non-printed filter · CPC title

• H05K1/0233

  Filters, inductors or a magnetic substance · CPC title

• H02M1/44

  Circuits or arrangements for compensating for electromagnetic interference in converters or inverters · CPC title