Z-directed printed circuit board components having conductive channels for reducing radiated emissions

• US 8,822,838 B2
• Filed: 03/29/2012
• Issued: 09/02/2014
• Est. Priority Date: 03/29/2012
• Status: Active Grant

• Current Assignee: Lexmark International Incorporated (Ninestar Corporation)
• Original Assignee: Lexmark International Incorporated (Ninestar Corporation)
• Inventors: Hardin, Keith Bryan
• Primary Examiner(s): Norris, Jeremy C
• Application Number:
  US13/433,355
• Publication Number:
  US 20130256021A1
• Time in Patent Office: 887 Days
• Field of Search: 174/260, 174262-266, 361761-764, 29837-839
• US Class Current: 174/260
• CPC Class Codes: H01G 2/06 specially adapted for mounting on a printed-circuit support
• CPC Class Codes: H01G 4/012 Form of non-self-supporting electrodes
• CPC Class Codes: H01G 4/232 electrically connecting two or more layers of a stacked or rolled capacitor
• CPC Class Codes: H01G 4/30 Stacked capacitors H01G4/33 takes precedence
• CPC Class Codes: H05K 1/0221 Coaxially shielded signal lines comprising a continuous shielding layer partially or wholly surrounding the signal lines
• CPC Class Codes: H05K 1/0231 Capacitors or dielectric substances
• CPC Class Codes: H05K 1/0251 related to vias or transitions between vias and transmission lines
• CPC Class Codes: H05K 1/0298 Multilayer circuits
• 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 2201/10053 Switch
• CPC Class Codes: H05K 2201/10984 Component carrying a connection agent, e.g. solder, adhesive soldering leadless components having an array of bottom contacts H05K3/3436; BGA components H05K2201/10734
• CPC Class Codes: H05K 3/4046 using auxiliary conductive elements, e.g. metallic spheres, eyelets, pieces of wire

Abstract

A Z-directed component for mounting in a mounting hole in a printed circuit board according to one example embodiment includes a body having a top surface, a bottom surface and a side surface. The body has a cross-sectional shape that is insertable into the mounting hole in the printed circuit board. A portion of the body is composed of an insulator. Four conductive channels extend through a portion of the body along the length of the body. The four conductive channels are spaced substantially equally around a perimeter of the body.

Claims

1. A Z-directed component for mounting in a mounting hole in a printed circuit board, comprising:

a body having a top surface, a bottom surface and a side surface, a cross-sectional shape that is insertable into the mounting hole in the printed circuit board, a portion of the body being composed of an insulator; and

four conductive channels extending through a portion of the body along the length of the body, the four conductive channels being spaced substantially equally around a perimeter of the body,

wherein the body includes a plurality of stacked layers composed of a dielectric material and having a conductive material plated on a surface thereof, wherein a first set of the stacked layers are electrically connected to a first and a second of the four conductive channels and a second set of the stacked layers are electrically connected to a third and a fourth of the four conductive channels, wherein the first and the second of the four conductive channels are not electrically connected to the third and the fourth of the four conductive channels, the first and second sets of stacked layers being arranged in an alternating pattern, the first and second conductive channels being positioned opposite each other and the third and fourth conductive channels being positioned opposite each other.

2. The Z-directed component of claim 1, wherein the four conductive channels are each side channels in the side surface of the body.

3. The Z-directed component of claim 1, wherein the four conductive channels each extend through an interior portion of the body spaced inward from the side surface of the body.

4. The Z-directed component of claim 1, wherein the body has a cylindrical cross-sectional shape and the four conductive channels are spaced about 90 degrees from each other around the perimeter of the body.

5. The Z-directed component of claim 1, further comprising a fifth conductive channel extending through an interior portion of the body along the length of the body from the top surface to the bottom surface, the fifth conductive channel forming a signal path through the body.

6. The Z-directed component of claim 1, wherein one of (1) the first and second conductive channels and (2) the third and fourth conductive channels are electrically connected to each other by the conductive material plated on the surface of the stacked layers.

7. The Z-directed component of claim 6, wherein the first and second conductive channels are electrically connected to each other by the conductive material plated on the surface of the first set of stacked layers and the third and fourth conductive channels are electrically connected to each other by the conductive material plated on the surface of the second set of stacked layers.

8. The Z-directed component of claim 6, wherein the other of (1) the first and second conductive channels and (2) the third and fourth conductive channels are each electrically connected to a respective portion of the conductive material plated on the surface of the respective first or second set of stacked layers, said respective portions of conductive material being separated from each other on the surface of said first or second set of stacked layers such that said respective portions of conductive material are not electrically connected to each other.

9. The Z-directed component of claim 1, wherein the first and second conductive channels are electrically connected to respective first and second portions of the conductive material plated on the surface of the first set of stacked layers and the third and fourth conductive channels are electrically connected to respective first and second portions of the conductive material plated on the surface of the second set of stacked layers, the first and second portions of conductive material on the first set of stacked layers being separated from each other such that the first and second portions of conductive material on the first set of stacked layers are not electrically connected to each other and the first and second portions of conductive material on the second set of stacked layers being separated from each other such that the first and second portions of conductive material on the second set of stacked layers are not electrically connected to each other.

10. A printed circuit board, comprising:

a Z-directed component mounted in a mounting hole in the printed circuit board, the Z-directed component including;

a body having a top surface, a bottom surface and a side surface, a portion of the body being composed of an insulator; and

four conductive channels extending through a portion of the body along the length of the body, the four conductive channels being spaced substantially equally around a perimeter of the body,

wherein the body of the Z-directed component includes a plurality of stacked layers composed of a dielectric material and having a conductive material plated on a surface thereof, wherein a first set of the stacked layers are electrically connected to a first and a second of the four conductive channels and a second set of the stacked layers are electrically connected to a third and a fourth of the four conductive channels, wherein the first and the second of the four conductive channels are not electrically connected to the third and the fourth of the four conductive channels, the first and second sets of stacked layers being arranged in an alternating pattern, the first and second conductive channels being positioned opposite each other and the third and fourth conductive channels being positioned opposite each other, the first, second, third and fourth conductive channels being electrically connected to a first, a second, a third and a fourth voltage path of the printed circuit board, respectively.

11. The printed circuit board of claim 10, wherein the four conductive channels are each side channels in the side surface of the body of the Z-directed component.

12. The printed circuit board of claim 10, wherein the body of the Z-directed component has a cylindrical cross-sectional shape and the four conductive channels are spaced about 90 degrees from each other around the perimeter of the body.

13. The printed circuit board of claim 10, wherein the Z-directed component further includes a fifth conductive channel extending through an interior portion of the body of the Z-directed component along the length of the body from the top surface to the bottom surface, the fifth conductive channel being electrically connected to a signal path of the printed circuit board.

14. The printed circuit board of claim 10, wherein the first and second conductive channels are electrically connected to each other by the conductive material plated on the surface of the first set of stacked layers and the first and second voltage paths of the printed circuit board are a common ground path, wherein the third and fourth conductive channels are electrically connected to each other by the conductive material plated on the surface of the second set of stacked layers and the third and fourth voltage paths of the printed circuit board are a common voltage supply path.

15. A Z-directed component for mounting in a mounting hole in a printed circuit board, comprising:

a body having a top surface, a bottom surface and a side surface, a cross-sectional shape that is insertable into the mounting hole in the printed circuit board, a portion of the body being composed of an insulator;

four conductive channels extending through a portion of the body along the length of the body, the four conductive channels being spaced substantially equally around a perimeter of the body; and

a plurality of alternating plates positioned within the body forming a capacitor, a first set of the alternating plates being electrically connected to a first and a second of the four conductive channels and a second set of the alternating plates being electrically connected to a third and a fourth of the four conductive channels, the first and second conductive channels being positioned opposite each other and the third and fourth conductive channels being positioned opposite each other.

16. A printed circuit board, comprising:

a Z-directed component mounted in a mounting hole in the printed circuit board, the Z-directed component including;

a body having a top surface, a bottom surface and a side surface, a portion of the body being composed of an insulator; and

four conductive channels extending through a portion of the body along the length of the body, the four conductive channels being spaced substantially equally around a perimeter of the body,

wherein the Z-directed component further includes a plurality of alternating plates positioned within the body forming a capacitor, a first set of the alternating plates being electrically connected to a first and a second of the four conductive channels and a second set of the alternating plates being electrically connected to a third and a fourth of the four conductive channels, the first and second conductive channels being positioned opposite each other and the third and fourth conductive channels being positioned opposite each other.