Z-directed printed circuit board components having conductive channels for controlling transmission line impedance

• US 8,822,840 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:
  US13/433,340
• Publication Number:
  US 20130256019A1
• Time in Patent Office: 887 Days
• Field of Search: 174/260, 174262-266, 29837-839, 361761-764
• US Class Current: 174/262
• CPC Class Codes: H05K 1/0219 Printed shielding conductors for shielding around or between signal conductors, e.g. coplanar or coaxial printed shielding conductors
• CPC Class Codes: H05K 1/0222 for shielding around a single via or around a group of vias, e.g. coaxial vias or vias surrounded by a grounded via fence
• CPC Class Codes: H05K 1/162 incorporating printed capacitors
• 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 2201/09645 Patterning on via walls; Plural lands around one hole
• 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. A first conductive channel extends through an interior portion of the body along the length of the body from the top surface to the bottom surface. The first conductive channel forms a signal path through the body. A second conductive channel and a third conductive channel each extends through the interior portion of the body along the length of the body. The second and third conductive channels are positioned next to and on opposite sides of the first conductive channel.

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;

a first 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 first conductive channel forming a signal path through the body; and

a second conductive channel and a third conductive channel each extending through the interior portion of the body along the length of the body, the second and third conductive channels being positioned next to and on opposite sides of the first conductive channel in position to control transmission line impedance through the first conductive channel.

2. The Z-directed component of claim 1, wherein each of the top surface and the bottom surface includes a conductive trace electrically connected to a respective end of the first conductive channel and extending therefrom across the respective top or bottom surface to an edge of the body.

3. The Z-directed component of claim 1, further comprising a plurality of alternating plates positioned within the body, a portion of the body between the alternating plates being composed of a dielectric material, the alternating plates and the dielectric material forming a capacitor, a first set of the alternating plates being connectable to a first voltage and a second set of the alternating plates being connectable to a second voltage different from the first voltage, the second conductive channel being electrically connected to one of the first set of alternating plates and the second set of alternating plates but not the other of the first set of alternating plates and the second set of alternating plates and the third conductive channel being electrically connected to one of the first set of alternating plates and the second set of alternating plates but not the other of the first set of alternating plates and the second set of alternating plates.

4. The Z-directed component of claim 3, wherein the second conductive channel is electrically connected to the first set of alternating plates but not the second set of alternating plates and the third conductive channel is electrically connected to the second set of alternating plates but not the first set of alternating plates.

5. The Z-directed component of claim 1, wherein the side surface includes a first conductive side channel and a second conductive side channel therein, wherein the body includes a plurality of stacked layers having a conductive material plated on a surface thereof, wherein a first set of the stacked layers are electrically connected to the first conductive side channel but not the second conductive side channel and a second set of the stacked layers are electrically connected to the second conductive side channel but not the first conductive side channel, the first and second sets of stacked layers being arranged in an alternating pattern, the second and third conductive channels each being electrically connected to one of the first set of stacked layers and the second set of stacked layers but not the other of the first set of stacked layers and the second set of stacked layers and electrically connected to a corresponding one of the first conductive side channel and the second conductive side channel but not the other of the first conductive side channel and the second conductive side channel.

6. The Z-directed component of claim 5, wherein the second conductive channel is electrically connected to the first set of stacked layers and the first conductive side channel but not the second set of stacked layers or the second conductive side channel and the third conductive channel is electrically connected to the second set of stacked layers and the second conductive side channel but not the first set of stacked layers or the first conductive side channel.

7. The Z-directed component of claim 1, wherein the side surface includes a first conductive side channel and a second conductive side channel therein, wherein the body includes a plurality of interleaved conductive plates extending along the length of the body, wherein a first set of the interleaved conductive plates are electrically connected to the first conductive side channel but not the second conductive side channel and a second set of the interleaved conductive plates are electrically connected to the second conductive side channel but not the first conductive side channel, the first and second sets of interleaved conductive plates being arranged in an alternating pattern, the second and third conductive channels each being electrically connected to one of the first set of interleaved conductive plates and the second set of interleaved conductive plates but not the other of the first set of interleaved conductive plates and the second set of interleaved conductive plates and electrically connected to a corresponding one of the first conductive side channel and the second conductive side channel but not the other of the first conductive side channel and the second conductive side channel.

8. The Z-directed component of claim 7, wherein the second conductive channel is electrically connected to the first set of interleaved conductive plates and the first conductive side channel but not the second set of interleaved conductive plates or the second conductive side channel and the third conductive channel is electrically connected to the second set of interleaved conductive plates and the second conductive side channel but not the first set of interleaved conductive plates or the first conductive side channel.

9. 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;

a first conductive channel extending through an interior portion of the body along the length of the body from the top surface to the bottom surface; and

a second conductive channel and a third conductive channel each extending through the interior portion of the body along the length of the body, the second and third conductive channels being positioned next to and on opposite sides of the first conductive channel in position to control transmission line impedance through the first conductive channel;

wherein the first conductive channel is electrically connected to a signal path of the printed circuit board and the second and third conductive channels are connected to a first voltage path and a second voltage path, respectively, of the printed circuit board.

10. The printed circuit board of claim 9, wherein one of the first voltage path and the second voltage path is a ground path and the other of the first voltage path and the second voltage path is a voltage supply path.

11. The printed circuit board of claim 9, wherein the first voltage path and the second voltage path are configured to transmit a common voltage.

12. The printed circuit board of claim 9, further comprising a conductive trace on each of the top surface and the bottom surface of the Z-directed component electrically connected at one end to a respective end of the first conductive channel and electrically connected at the other end to a conductive trace on the respective top or bottom surface of the printed circuit board.

13. The printed circuit board of claim 9, wherein the Z-directed component further includes a plurality of alternating plates positioned within the body, a portion of the body of the Z-directed component between the alternating plates being composed of a dielectric material, the alternating plates and the dielectric material forming a capacitor, a first set of the alternating plates being electrically connected to the first voltage path and a second set of the alternating plates being electrically connected to the second voltage path, the second conductive channel being electrically connected to one of the first set of alternating plates and the second set of alternating plates but not the other of the first set of alternating plates and the second set of alternating plates and the third conductive channel being electrically connected to one of the first set of alternating plates and the second set of alternating plates but not the other of the first set of alternating plates and the second set of alternating plates.

14. The printed circuit board of claim 13, wherein the second conductive channel is electrically connected to the first set of alternating plates but not the second set of alternating plates and the third conductive channel is electrically connected to the second set of alternating plates but not the first set of alternating plates.

15. The printed circuit board of claim 9, wherein the side surface of the Z-directed component includes a first conductive side channel and a second conductive side channel therein, wherein the body of the Z-directed component includes a plurality of stacked layers having a conductive material plated on a surface thereof, wherein a first set of the stacked layers are electrically connected to the first conductive side channel but not the second conductive side channel and a second set of the stacked layers are electrically connected to the second conductive side channel but not the first conductive side channel, the first and second sets of stacked layers being arranged in an alternating pattern, the second and third conductive channels of the Z-directed component each being electrically connected to one of the first set of stacked layers and the second set of stacked layers but not the other of the first set of stacked layers and the second set of stacked layers and electrically connected to a corresponding one of the first conductive side channel and the second conductive side channel but not the other of the first conductive side channel and the second conductive side channel.

16. The printed circuit board of claim 15, wherein the second conductive channel of the Z-directed component is electrically connected to the first set of stacked layers and the first conductive side channel but not the second set of stacked layers or the second conductive side channel and the third conductive channel of the Z-directed component is electrically connected to the second set of stacked layers and the second conductive side channel but not the first set of stacked layers or the first conductive side channel.

17. The printed circuit board of claim 9, wherein the side surface of the Z-directed component includes a first conductive side channel and a second conductive side channel therein, wherein the body of the Z-directed component includes a plurality of interleaved conductive plates extending along the length of the body, wherein a first set of the interleaved conductive plates are electrically connected to the first conductive side channel but not the second conductive side channel and a second set of the interleaved conductive plates are electrically connected to the second conductive side channel but not the first conductive side channel, the first and second sets of interleaved conductive plates being arranged in an alternating pattern, the second and third conductive channels of the Z-directed component each being electrically connected to one of the first set of interleaved conductive plates and the second set of interleaved conductive plates but not the other of the first set of interleaved conductive plates and the second set of interleaved conductive plates and electrically connected to a corresponding one of the first conductive side channel and the second conductive side channel but not the other of the first conductive side channel and the second conductive side channel.

18. The printed circuit board of claim 17, wherein the second conductive channel of the Z-directed component is electrically connected to the first set of interleaved conductive plates and the first conductive side channel but not the second set of interleaved conductive plates or the second conductive side channel and the third conductive channel of the Z-directed component is electrically connected to the second set of interleaved conductive plates and the second conductive side channel but not the first set of interleaved conductive plates or the first conductive side channel.