Optical module with a dual layer PCBA structure

Patent metadata

Field	Value
Publication number	US-9915780-B2
Application number	US-201715627838-A
Country	US
Kind code	B2
Filing date	Jun 20, 2017
Priority date	Jun 21, 2016
Publication date	Mar 13, 2018
Grant date	Mar 13, 2018

Abstract

An optical module with a dual layer printed circuit board assembly (PCBA) structure. The optical module includes a first casing and a second casing, and a first PCBA board and a second PCBA board located between the first casing and the second casing, a plurality of power components arranged on opposing surfaces of at least one of the first PCBA board and the second PCBA board, a layer of thermal superconducting medium of a bent arrangement including a first thermal conducting part and a second thermal conducting part arranged opposite to each other, the first thermal conducting part being thermally connected to the power component, and the second thermal conducting part being thermally connected to at least one of the first casing and the second casing, and at least one insulating layer arranged between the layer of thermal superconducting medium and the power components.

First claim

What is claimed is:

1. An optical module with a dual layer printed circuit board assembly (PCBA) structure, comprising:
a first casing and a second casing;
a first PCBA board and a second PCBA board located between the first casing and the second casing;
a plurality of power components arranged on opposing surfaces of at least one of the first PCBA board and second PCBA board;
a layer of thermal superconducting medium of a bent arrangement including a first thermal conducting part and a second thermal conducting part arranged opposite to each other, the first thermal conducting part being thermally connected to the power components, and the second thermal conducting part being thermally connected to at least one of the first casing and the second casing; and
at least one insulating layer arranged between the layer of thermal superconducting medium and the power components.

2. The optical module according to claim 1 , wherein
the first casing comprises a first horizontal wall arranged opposite to the first PCBA board,
the second casing comprises a second horizontal wall arranged opposite to the second PCBA board, and
the layer of thermal superconducting medium is thermally connected to at least one of the first horizontal wall and the second horizontal wall.

3. The optical module according to claim 2 , wherein the layer of thermal superconducting medium comprises a third thermal conducting part connecting the first thermal conducting part and the second thermal conducting part,
the power components being thermally connected to the first thermal conducting part through the at least one insulating layer, and
the second thermal conducting part being thermally connected to at least one of the first horizontal wall of the first casing or the second horizontal wall of the second casing.

4. The optical module according to claim 1 , wherein
the first casing comprises a first side wall arranged perpendicular to the first PCBA board,
the second casing comprises a second side wall arranged perpendicular to the second PCBA board, and
the layer of thermal superconducting medium is thermally connected to at least one of the first side wall or the second side wall.

5. The optical module according to claim 4 , wherein the layer of thermal superconducting medium comprises a third thermal conducting part connecting the first thermal conducting part and the second thermal conducting part,
the power components being thermally connected to the first thermal conducting part through the at least one insulating layer, and
the second thermal conducting part being thermally connected to at least one of the first side wall of the first casing or the second side wall of the second casing.

6. The optical module according to claim 1 , wherein an insulating layer is arranged on a surface of at least one side of at least one of the layer of thermal superconducting medium between the first casing and the first PCBA board or the layer of thermal superconducting medium between the second casing and the second PCBA board.

7. The optical module according to claim 1 , wherein the layer of thermal superconducting medium has a planar thermal conductivity coefficient of 400-2000 W/(m·K) and a vertical thermal conductivity coefficient of 10-20 W/(m·K).

8. The optical module according to claim 7 , wherein the layer of thermal superconducting medium is made of one of the following: graphene, copper foil, or aluminum foil.

9. The optical module according to claim 1 , wherein the first casing and second casing are pressed tightly against the first PCBA board and second PCBA board.

10. The optical module according to claim 1 , wherein the first PCBA board and the second PCBA board are electrically connected through a flexible circuit board.

11. The optical module according to claim 1 , wherein heat generated by the power components is transferred through the insulating layer to the layer of thermal superconducting medium where the heat is diffused horizontally and transferred to at least one of the first casing and the second casing.

Assignees

• Innolight Tech Suzhou Ltd

Inventors

• Wang Zhanwei
• Wang Kewu

Classifications

• G02B6/4283

  with electrical insulation means · CPC title

• G02B6/4274

  Electrical aspects (G02B6/4263 and G02B6/4265 take precedence) · CPC title

• G02B6/4281

  the printed circuit boards being flexible (in general H05K1/147) · CPC title

• G02B6/122 Primary

  Basic optical elements, e.g. light-guiding paths · CPC title

• H04L69/12

  Protocol engines · CPC title