Z-directed capacitor components for printed circuit boards

• US 9,984,820 B2
• Filed: 09/03/2014
• Issued: 05/29/2018
• Est. Priority Date: 07/23/2009
• Status: Active Grant

• Current Assignee: Lexmark International Incorporated (Ninestar Corporation)
• Original Assignee: Lexmark International Incorporated (Ninestar Corporation)
• Inventors: Hardin, Keith Bryan, Fessler, John Thomas, Hall, Paul Kevin, Oglesbee, Robert Aaron
• Primary Examiner(s): Thomas, Eric
• Assistant Examiner(s): Ramaswamy, Arun
• Application Number:
  US14/475,656
• Publication Number:
  US 20140368966A1
• Time in Patent Office: 1,364 Days
• Field of Search: 361302, 3613061, 361 72, 361293, 3613212, 3613211, 3613014, 361304, 3613012
• CPC Class Codes: H01G 2/06 specially adapted for mounting on a printed-circuit support
• CPC Class Codes: H01G 4/228 Terminals
• CPC Class Codes: H01G 4/28 Tubular capacitors
• CPC Class Codes: H05K 1/0231 Capacitors or dielectric substances
• CPC Class Codes: H05K 1/0233 Filters, inductors or a magnetic substance
• CPC Class Codes: H05K 1/0248 Skew reduction or using delay lines
• 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 2201/09645 Patterning on via walls; Plural lands around one hole
• CPC Class Codes: H05K 2201/10015 Non-printed capacitor
• CPC Class Codes: H05K 2201/10984 Component carrying a connection agent, e.g. solder, adhesive
• CPC Class Codes: H05K 3/4046 using auxiliary conductive elements, e.g. metallic spheres, eyelets, pieces of wire

Abstract

A Z-directed capacitor according to one embodiment includes a body having top, bottom and side surfaces, a cross-sectional shape that is insertable into a mounting hole in a printed circuit board, and a plurality of stacked support members. Each support member includes an annular plate mounted on a surface thereof. A first conductive side channel and a second conductive side channel are formed in the side surface and extend along a top-to-bottom dimension of the body. A first set of the annular plates electrically contact the first conductive side channel but not the second conductive side channel and a second set of the annular plates electrically contact the second conductive side channel but not the first conductive side channel. A third conductive side channel is formed in the side surface, extends along the top-to-bottom dimension of the body and is electrically separated from the annular plates.

Claims

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

a body having a top surface, a bottom surface and an outer side surface, a cross-sectional shape that is insertable into the mounting hole in the printed circuit board, and a plurality of support members stacked intermediate the top surface and the bottom surface, each support member includes a conductive plate mounted on a surface of the support member, the conductive plate has an outer dimension that is less than an outer dimension of the support member on which it is mounted;

a first conductive side channel and a second conductive side channel formed in the outer side surface of the body and extending longitudinally on the outer side surface of the body along a top-to-bottom dimension of the body, a first set of the conductive plates electrically contact the first conductive side channel but not the second conductive side channel and a second set of the conductive plates electrically contact the second conductive side channel but not the first conductive side channel, the first and second sets of conductive plates are arranged in an alternating pattern; and

a third conductive side channel formed in the outer side surface of the body and extending longitudinally on the outer side surface of the body along the top-to-bottom dimension of the body, the third conductive side channel is electrically separated from all of the conductive plates mounted on the support members.

2. The Z-directed capacitor of claim 1, wherein each support member has a center opening and each conductive plate includes a center opening having a dimension that is larger than the center opening in the support member on which it is mounted, further comprising a conductor extending from the top surface to the bottom surface of the body and passing through the center openings of the plurality of support members.

3. The Z-directed capacitor of claim 2, further comprising a pair of conductive traces, one on each of the top and bottom surfaces of the body electrically connected to an end of the conductor adjacent thereto and extending therefrom to an edge of the body.

4. The Z-directed capacitor of claim 2, wherein the body further comprises a connection feature connected to an end of the conductor and selected from one of a conductive pad, a pogo-pin, and a spring.

5. The Z-directed capacitor of claim 1, wherein the body further comprises a plurality of dielectric disks interleaved with the support members.

6. The Z-directed capacitor of claim 1, wherein the support members are composed of a dielectric material.