Inlay PCB with embedded coin board

• US 9,668,336 B1
• Filed: 05/17/2013
• Issued: 05/30/2017
• Est. Priority Date: 05/18/2012
• Status: Active Grant

• Current Assignee: Flex, Ltd.
• Original Assignee: Flextronics America LLC (Flextronics International Limited)
• Inventors: Jacobsson, Henrik
• Primary Examiner(s): Willis, Tremesha S
• Application Number:
  US13/897,253
• Time in Patent Office: 1,474 Days
• Field of Search: 174265, 174250-252, 174255-259, 174261-262, 174264
• CPC Class Codes: H05K 1/0204 using means for thermal conduction connection in the thickness direction of the substrate H05K1/0207 takes precedence
• CPC Class Codes: H05K 1/0212 Printed circuits or mounted components having integral heating means
• CPC Class Codes: H05K 1/024 Dielectric details, e.g. changing the dielectric material around a transmission line
• CPC Class Codes: H05K 1/0298 Multilayer circuits
• CPC Class Codes: H05K 1/03 Use of materials for the substrate
• CPC Class Codes: H05K 3/00 Apparatus or processes for manufacturing printed circuits
• CPC Class Codes: Y10T 29/49126 Assembling bases
• CPC Class Codes: Y10T 29/49155 Manufacturing circuit on or in base

Abstract

A PCB and a method of manufacturing a PCB with combined inlay-PCB process and embedded coin technology are disclosed. The method and device disclosed herein is able to manufacture an inlay part of a high frequency laminate into FR4 laminate. The present invention is advantageous in many aspects including having an inlay design on the PCB, which can save the cost of high frequency laminate. Further, the inlay PCB with embedded coin technologies can enhance the thermal reliability of the finished PCB.

Claims

1. An electronic circuit board comprising:

a. a printed circuit board comprising a PCB portion and a high frequency portion for high frequency signal transfer, wherein the high frequency portion includes a first aperture and a second aperture that is in direct contact with the first aperture;

b. a high-frequency circuit material coupled to the first aperture; and

c. a heat dissipating material coupled to the second aperture, wherein the heat dissipating material comprises an inserted metallic coin, wherein the inserted metallic coin is in a direct contact with the high-frequency circuit material to facilitate a heat dissipation of the high-frequency circuit.

2. The electronic circuit board of claim 1, wherein the inserted metallic coin comprises copper.

3. The electronic circuit board of claim 1, wherein the high-frequency circuit material is fabricated to transfer a signal having a frequency of 500 MHz and above.

4. The electronic circuit board of claim 1, wherein the high-frequency circuit material is fabricated to transfer a microwave frequency signal.

5. The electronic circuit board of claim 1, wherein the second aperture is deeper than the first aperture in the printed circuit board.

6. The electronic circuit board of claim 1, wherein the printed circuit board comprises an FR4 printed circuit board.

7. A method of making an electronic circuit board comprising:

a. forming a first aperture on a high frequency portion for high frequency signal transfer on an electronic circuit board;

b. forming a second aperture on the high frequency portion on the electronic circuit board, wherein the first aperture is in direct contact with the second aperture;

c. placing a high-frequency circuit material in the first aperture; and

d. placing a heat dissipating material in the second aperture, wherein the heat dissipating material comprises an inserted metallic coin and wherein the inserted metallic coin is in a direct thermal contact with the high-frequency circuit material to facilitate a heat dissipation of the high-frequency circuit material.

8. The method of claim 7, further comprising transferring a high-frequency signal on an area of the electronic circuit board.

9. The method of claim 8, wherein the high-frequency signal comprises a microwave signal.

10. The method of claim 8, wherein the high-frequency signal has a frequency of 500 MHz and above.

11. The method of claim 7, wherein the electronic circuit board comprises an FR4 PCB.

12. The method of claim 7, wherein the inserted metallic coin comprises a copper coin.

13. A method of forming an inlay PCB with an embedded coin comprising:

a. forming a high-frequency opening on a high frequency portion, through a first set of plurality of layers, of a PCB board, wherein the PCB board comprises a PCB portion and the high frequency portion;

b. forming an opening for a coin on the high frequency portion, through a second set of plurality of layers, of the PCB board, wherein the opening for the coin is in direct contact with the high-frequency opening;

c. performing oxide replacement;

d. inserting a high-frequency laminate into the opening of the first set of plurality of layers of the PCB board; and

e. inserting the coin into the opening of the second set of plurality of layers of the PCB board such that the coin is in direct thermal contact with the high-frequency laminate to facilitate a heat dissipation of the high-frequency laminate.

14. The method of claim 13, wherein forming the high-frequency opening and the opening for the coin comprise routing.

15. The method of claim 13, wherein the high-frequency opening has a length less than 2.5 mil per side larger than a size of the high-frequency laminate.

16. The method of claim 13, wherein the opening for the coin has a length less than 5.5 mil per side larger than a size of the coin.

17. The method of claim 13, wherein the first set of plurality of layers comprise fewer than 5 layers of laminates of the PCB board.

18. The method of claim 13, wherein the second set of plurality of layers comprise more than 7 layers of laminates of the PCB board.