Ball grid array systems for surface mounting an integrated circuit using a Z-directed printed circuit board component

• US 8,830,692 B2
• Filed: 03/29/2012
• Issued: 09/09/2014
• 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): Nguyen, Hoa C
• Assistant Examiner(s): PATEL, AMOL H
• Application Number:
  US13/433,364
• Publication Number:
  US 20130258624A1
• Time in Patent Office: 894 Days
• Field of Search: 361/748, 361763-768, 361/780, 361/782, 174260-267
• US Class Current: 361/763
• 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 1/184 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 2201/10053 Switch
• CPC Class Codes: H05K 3/4046 using auxiliary conductive elements, e.g. metallic spheres, eyelets, pieces of wire

Abstract

A printed circuit board according to one example embodiment includes a Z-directed component mounted in a mounting hole in the printed circuit board. The Z-directed component includes a body having a top surface, a bottom surface and a side surface. 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. An integrated circuit is mounted on a surface of the printed circuit board. The integrated circuit has a ball grid array that includes four conductive balls electrically connected to a corresponding one of the four conductive channels of the Z-directed component.

Claims

1. 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, a first and a second of the four conductive channels being positioned opposite each other and a third and a fourth of the four conductive channels being positioned opposite each other;

an integrated circuit chip mounted on a surface of the printed circuit board, the integrated circuit chip having a ball grid array that includes four conductive balls electrically connected to a corresponding one of the four conductive channels of the Z-directed component; and

four wire bonds electrically connecting the four conductive balls of the ball grid array to four corresponding contacts on a substrate of the integrated circuit chip,

wherein the first and second conductive channels of the Z-directed component are electrically connected to a common ground path of the printed circuit board, the third conductive channel of the Z-directed component is electrically connected to a first voltage supply path of the printed circuit board and the fourth conductive channel of the Z-directed component is electrically connected to a second voltage supply path of the printed circuit board,

wherein a first of the four contacts on the substrate of the integrated circuit chip electrically connected to the first conductive channel is positioned next to a third of the four contacts electrically connected to the third conductive channel and a second of the four contacts electrically connected to the second conductive channel is positioned next to a fourth of the four contacts electrically connected to the fourth conductive channel,

wherein the four contacts on the substrate of the integrated circuit chip are aligned in a row according to one of;

(1) the third and fourth contacts being positioned next to each other between the first and second contacts and (2) the first and second contacts being positioned next to each other between the third and fourth contacts.

2. The printed circuit board of claim 1, wherein the first voltage supply path and the second voltage supply path are configured to transmit a common voltage.

3. The printed circuit board of claim 1, wherein the Z-directed component is mounted flush with the surface of the printed circuit board.

4. The printed circuit board of claim 1, further comprising four conductive ball pads each electrically connected to a corresponding one of the four conductive channels of the Z-directed component, wherein each of the four conductive balls of the ball grid array is positioned on and electrically connected to a corresponding one of the four conductive ball pads electrically connecting the conductive channels of the Z-directed component to the conductive balls of the ball grid array.

5. The printed circuit board of claim 4, wherein at least one of the conductive ball pads is positioned on top of the Z-directed component.

6. The printed circuit board of claim 5, wherein the at least one conductive ball pad overlaps the Z-directed component and the surface of the printed circuit board.

7. The printed circuit board of claim 5, wherein the entire at least one conductive ball pad is positioned on top of the Z-directed component.

8. The printed circuit board of claim 4, wherein at least one of the conductive ball pads is positioned on the surface of the printed circuit board and connected to the corresponding conductive channel of the Z-directed component by a trace across the surface of the printed circuit board.

9. A printed circuit board, comprising:

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

a body having a top surface, a bottom surface and a side surface, the body including a plurality of stacked layers composed of a dielectric material and having a conductive material plated on a surface thereof;

four conductive channels extending through a portion of the body along the length of the body, the four conductive channels being selectively connected to the conductive material plated on the surface of the stacked layers; and

an integrated circuit mounted on a surface of the printed circuit board, the integrated circuit having a ball grid array that includes four conductive balls each being electrically connected to a corresponding one of the four conductive channels of the Z-directed component, the integrated circuit having a core region having a first voltage supply path and a ground path and an input/output region having a second voltage supply path and the ground path, the second voltage supply path being configured to transmit a voltage different from a voltage transmitted by the first voltage supply path,

wherein a first and a second of the four conductive channels of the Z-directed component are electrically connected to the ground path, a third of the four conductive channels of the Z-directed component is electrically connected to the first voltage supply path and a fourth of the four conductive channels of the Z-directed component is electrically connected to the second voltage supply path.

10. The printed circuit board of claim 9, wherein a first set of the stacked layers are electrically connected to the first and second conductive channels and a second set of the stacked layers are electrically connected to the third and fourth conductive channels, the first and second sets of stacked layers being arranged in an alternating pattern, the first and second conductive channels being 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 being each electrically connected to a respective portion of the conductive material plated on the surface of the second set of stacked layers, said respective portions of conductive material of the surface of the second set of stacked layers being separated from each other.

11. The printed circuit board of claim 9, wherein the four conductive channels of the Z-directed component are each side channels in the side surface of the body.

12. The printed circuit board of claim 9, wherein the four conductive channels each extend through an interior portion of the body spaced inward from the side surface of the body.

13. The printed circuit board of claim 9, 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.