Power supply board

• US 10,331,161 B2
• Filed: 12/08/2015
• Issued: 06/25/2019
• Est. Priority Date: 12/24/2014
• Status: Active Grant

• Current Assignee: Fujitsu Limited
• Original Assignee: Fujitsu Limited
• Inventors: Kanai, Yuki, Imamoto, Takashi
• Primary Examiner(s): Semenenko, Yuriy
• Application Number:
  US14/962,634
• Publication Number:
  US 20160192489A1
• Time in Patent Office: 1,295 Days
• CPC Class Codes: G06F 1/00 Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00 architectures of general purpose stored program computers G06F15/76
• CPC Class Codes: G06F 1/189 Power distribution
• CPC Class Codes: G06F 1/26 Power supply means, e.g. regulation thereof for memories G11C
• CPC Class Codes: H05K 1/0265 characterized by the lay-out of or details of the printed conductors, e.g. reinforced conductors, redundant conductors, conductors having different cross-sections
• CPC Class Codes: H05K 1/113 Via provided in pad; Pad over filled via
• CPC Class Codes: H05K 1/141 One or more single auxiliary printed circuits mounted on a main printed circuit, e.g. modules, adapters H05K1/142 and H05K1/147 take precedence
• CPC Class Codes: H05K 1/144 Stacked arrangements of planar printed circuit boards
• CPC Class Codes: H05K 2201/042 Stacked spaced PCBs; Planar parts of folded flexible circuits having mounted components in between or spaced from each other
• CPC Class Codes: H05K 2201/09309 Core having two or more power planes; Capacitive laminate of two power planes
• CPC Class Codes: H05K 2201/0979 Redundant conductors or connections, i.e. more than one current path between two points
• CPC Class Codes: H05K 2201/10242 Metallic cylinders small solder preforms other than balls H05K2203/0415
• CPC Class Codes: H05K 2201/10303 Pin-in-hole mounted pins

Abstract

A power supply board includes: a first board including a top surface on which a processor is capable of being mounted, a bottom surface located on an opposite side of the top surface, and a plurality of first through holes and a plurality of second through holes capable of being electrically connected with the processor by penetrating through the first board from the top surface to the bottom surface; a second board arranged at a position distant from the bottom surface of the first board and provided with a power supply device; a first conductor mounted on the bottom surface of the first board and electrically connects the plurality of first through holes and the power supply device, and a second conductor mounted on the bottom surface of the first board and electrically connects the plurality of second through holes and the power supply device.

Claims

1. A power supply board comprising:

a first board including a top surface on which a processor is capable of being mounted, a bottom surface located on an opposite side of the top surface, and a plurality of first through holes and a plurality of second through holes each capable of being electrically connected with the processor by penetrating through the first board from the top surface to the bottom surface;

a second board arranged at a position spaced apart from the bottom surface of the first board and provided with a power supply device;

a first continuous conductor mounted on the bottom surface of the first board and electrically connecting all of the first through holes to the power supply device; and

a second continuous conductor mounted on the bottom surface of the first board and electrically connecting all of the second through holes to the power supply device.

2. The power supply board according to claim 1, wherein a power supply voltage is supplied from the power supply device to the processor through the first through hole and the first conductor, and a ground voltage is supplied from the power supply device to the processor through the second through hole and the second conductor.

3. The power supply board according to claim 1, wherein the first conductor is arranged at a location just below the first through holes and a central portion of the second board, the second conductor is arranged at a location just below the second through holes and the central portion of the second board, and the power supply device is arranged at an outer periphery outside of the central portion of the second board.

4. The power supply board according to claim 1, wherein the first conductor and the second conductor are a first connector, and the second board include a second connector coupled with the first connector.

5. The power supply board according to claim 1, wherein the first conductor includes a first portion mounted on the bottom surface of the first board and a second portion inserted into a third through hole penetrating through the second board, and a diameter of the first portion of the first conductor is larger than a diameter of the hole provided in the third through hole.

6. The power supply board according to claim 1, wherein the second conductor includes a first portion mounted on the bottom surface of the first board and a second portion inserted into a fourth through hole penetrating through the second board, and a diameter of the first portion of the second conductor is larger than a diameter of the hole provided in the fourth through hole.

7. The power supply board according to claim 1, wherein the first conductor includes a first columnar portion mounted on the bottom surface of the first board, a second columnar portion which is in contact with the second board, and a third columnar portion formed between the first columnar portion and the second columnar portion, and

a diameter of the third columnar portion is smaller than a diameter of the first columnar portion and a diameter of the second columnar portion.

8. The power supply board according to claim 1, wherein the second conductor includes a first columnar portion mounted on the bottom surface of the first board, a second columnar portion which is in contact with the second board, and a third columnar portion formed between the first columnar portion and the second columnar portion, and

a diameter of the third columnar portion is smaller than a diameter of the first columnar portion and a diameter of the second columnar portion.

9. The power supply board according to claim 1, wherein the first board includes a plurality of signal transmission paths that are formed inside thereof and transmit a signal processed by the processor.

10. The power supply board according to claim 9, wherein each of the plurality of signal transmission paths includes wirings extending in a planar direction of the first board and vias extending in a thickness direction of the first board.

11. The power supply board according to claim 1, wherein first solder balls and second solder balls are provided between the processor and the first board,

the first solder balls and the first through holes are connected to each other through a single first surface pattern, and

the second solder balls and the second through holes are connected to each other through a single second surface pattern.

12. The power supply board according to claim 11, wherein the number of the first through holes is made greater than the number of the first solder balls, and

the number of the second through holes is made greater than the number of the second solder balls.

13. The power supply board according to claim 1, wherein the first through holes and the first conductor are connected to each other through a single first surface pattern, and

the second through holes and the second conductor are connected to each other through a single second surface pattern.

14. The power supply board according to claim 1, wherein each of the first conductor and the second conductor is a pillar including a first portion and a second portion thinner than the first portion.