Methods and apparatus for installing a feed through filter

• US 20080036556A1
• Filed: 08/10/2006
• Published: 02/14/2008
• Est. Priority Date: 08/10/2006
• Status: Abandoned Application

• Current Assignee: Honeywell International Inc.
• Original Assignee: Honeywell International Inc.
• Inventors: Harrington, James B.
• Application Number:
  US11/502,076
• Publication Number:
  US 20080036556A1
• Time in Patent Office: Days
• US Class Current: 333/182
• CPC Class Codes: H05K 1/0233 Filters, inductors or a magnetic substance
• CPC Class Codes: H05K 1/184 Components including terminals inserted in holes through the printed circuit board and connected to printed contacts on the walls of the holes or at the edges thereof or protruding over or into the holes
• CPC Class Codes: H05K 2201/1006 Non-printed filter
• CPC Class Codes: H05K 2201/10454 Vertically mounted
• CPC Class Codes: H05K 9/0066 Constructional details of transient suppressor

Abstract

A method of installing a filter into an electronic circuit board is provided. The method includes inserting a second section of the filter into an aperture defined in the electronic circuit board, such that a first section of the filter is secure against an electronic circuit board first surface and a first lead of the filter extends to a solder pad on the electronic circuit board first surface. The method also includes coupling a second lead to a second contact of the filter such that the second lead extends to a solder pad on an electronic circuit board second surface. The method also includes reflowing the circuit board such that the first lead is soldered to the electronic circuit board first surface, and the second lead is soldered to the electronic circuit board second surface.

Claims

1. A method of installing a filter into an electronic circuit board, wherein the filter includes a first section having a first contact and a first width and a second section having a second contact and a second width that is narrower than the first width, the filter also includes a first lead extending from the first contact and a second lead, said method comprising:

inserting the second section into an aperture defined in the electronic circuit board, such that the first section is secure against an electronic circuit board first surface and the first lead extends to a solder pad on the electronic circuit board first surface;

coupling the second lead to the second contact such that the second lead extends to a solder pad on an electronic circuit board second surface; and

reflowing the circuit board such that the first lead is soldered to the electronic circuit board first surface, and the second lead is soldered to the electronic circuit board second surface.

2. A method in accordance with claim 1 wherein the first and the second lead each have a spring-like quality, said method further comprising:

contacting the solder pads with the first and the second lead utilizing the spring-like quality of the first and the second lead; and

retaining the filter within the electronic circuit board utilizing the spring-like quality of the second lead.

3. A method in accordance with claim 1 wherein the second section contact extends from the second section, said coupling the second lead to the second contact comprises engaging the second lead and the second contact.

4. A method in accordance with claim 3 wherein the second contact and the second lead both include a plurality of protrusions, said engaging the second lead and the second contact comprises interlocking the second lead plurality of protrusions with the second contact plurality of protrusions.

5. A method in accordance with claim 1 wherein a portion of the first section includes a plating capable of being soldered, said method further comprising positioning the plating secure against an electronic circuit board ground plane to facilitate soldering the first section to the electronic circuit board ground plane.

6. A method in accordance with claim 1 wherein the second section includes a protrusion extending therefrom, said method further comprising inserting the second section into the aperture such that the protrusion extends at least partially across the electronic circuit board second surface.

7. A filter configured for installation on an electronic circuit board, said filter comprising:

a first section having a first contact and a first width;

a second section having a second contact and a second width that is narrower than said first width, said second section configured to be inserted into an aperture in the electronic circuit board;

a first lead extending from said first contact and configured to extend to a solder pad on a first surface of the electronic circuit board; and

a second lead configured to couple to said second contact and extend to a solder pad on a second surface of the electronic circuit board, wherein contact between the solder pads and said first and said second lead enables the electronic circuit board to be reflowed.

8. A filter in accordance with claim 7 wherein said first and said second leads have a spring-like quality which enables said first and said second lead to contact the solder pads on the electronic circuit board.

9. A filter in accordance with claim 8 wherein said spring-like quality of said second lead is configured to retain said filter within the electronic circuit board.

10. A filter in accordance with claim 7 wherein said second section contact extends from said second section and said second lead is configured to engage said second section contact.

11. A filter in accordance with claim 10 wherein the second section contact and the second lead both comprise a plurality of protrusions, said second lead plurality of protrusions configured to interlock with said second section contact plurality of protrusions.

12. A filter in accordance with claim 7 wherein said first section comprises a plating configured to solder said first section to a ground plane of the electronic circuit board.

13. A filter in accordance with claim 7 wherein said second section comprises a protrusion extending therefrom and configured to lock said filter in the electronic circuit board.

14. An electronic system configured to be reflowed, said electronic system comprising:

an electronic circuit board having a first surface and a second surface; and

at least one EMI filter, each EMI filter comprising;

a first section having a first contact and a first width;

a second section having a second contact and a second width that is narrower than said first width, said second section inserted into said electronic circuit board such that said first section is secure against said electronic circuit board first surface;

a first lead extending from said first contact to a solder pad on a said electronic board first surface; and

a second lead coupled to said second contact and extending to a solder pad on said electronic circuit board second surface, wherein contact between said solder pads and said first and said second leads enables said electronic system to be reflowed.

15. An electronic system in accordance with claim 14 wherein said first lead and said second lead have a spring-like quality which enables said first and said second lead to contact the solder pads on said electronic circuit board.

16. An electronic system in accordance with claim 15 wherein said spring-like quality of said second lead retains said filter within said electronic circuit board.

17. An electronic system in accordance with claim 14 wherein said second section contact extends from said second section and said second lead is engaged with said second section contact.

18. An electronic system in accordance with claim 17 further comprising a plurality of protrusions extending from said second section contact and a plurality of protrusions extending from said second lead, said second section contact plurality of protrusions interlocked with said second lead plurality of protrusions.

19. An electronic system in accordance with claim 14 wherein said first section is soldered to a ground plane of said electronic circuit board.

20. An electronic system in accordance with claim 14 wherein said second section comprises a protrusion extending therefrom and at least partially across said electronic circuit board second surface.

21. A lead for a feed through filter, said lead comprising:

an attachment member configured to engage a contact of the feed through filter; and

an elongated member extending from said body and configured to contact a solder pad of an electronic circuit board such that the electronic circuit board can be reflowed.

22. A lead in accordance with claim 21 wherein said elongated member has a spring-like quality which enables said lead to maintain contact with the solder pad of the electronic circuit board.

23. A lead in accordance with claim 21 wherein said elongated member has a spring-like quality which enables said lead to retain the filter within the electronic circuit board.

24. A lead in accordance with claim 21 wherein said attachment member is retained on the filter contact with friction.

25. A lead in accordance with claim 21 wherein said attachment member further comprises a plurality of protrusions configured to interlock with a plurality of protrusions on the filter contact.

26. A lead in accordance with claim 21 wherein said attachment member is tubular in shape and configured to engage a cylindrical filter contact.