Horizontal flex circuit with resistance weldable cover

Patent metadata

Field	Value
Publication number	US-2020116961-A1
Application number	US-201916600194-A
Country	US
Kind code	A1
Filing date	Oct 11, 2019
Priority date	Oct 16, 2018
Publication date	Apr 16, 2020
Grant date	—

Abstract

A resistance weldable cover for an OSA may include multiple walls, one or more supports, and an opening disposed in one of the walls. The walls may define an interior cavity within the walls. The one or more supports may extend from one or more of the walls. Each of the one or more supports may be weldable to a heat sink stiffener. The opening may be sized and shaped to receive at least a portion of a barrel such that optical signals are transmittable between the interior cavity and the barrel.

First claim

What is claimed is:

1 . A cover comprising:
a plurality of walls that defines an interior cavity within the plurality of walls; one or more supports that extend from one or more walls of the plurality of walls, each of the one or more supports weldable to a heat sink stiffener; and an opening disposed in a wall of the plurality of walls, the opening sized and shaped to receive at least a portion of a barrel such that optical signals are transmittable between the interior cavity and the barrel.

2 . The cover of claim 1 , wherein each of the one or more supports is tapered.

3 . The cover of claim 1 , wherein the one or more supports include a welding surface that is weldable to the heat sink stiffener.

4 . The cover of claim 3 , wherein each of the one or more supports is tapered such that a first portion of the one or more supports is narrower than a second portion of the one or more supports, the first portion more proximate to the welding surface than the second portion.

5 . The cover of claim 3 , wherein the welding surface of the one or more supports is perpendicular to each wall of the plurality of walls.

6 . The cover of claim 3 , wherein the welding surface of the one or more supports does not exceed one or more respective planes defined by the plurality of walls.

7 . The cover of claim 1 , further comprising a gap disposed between the one or more supports and the plurality of walls, the gap sized and shaped to receive a portion of a flex circuit into the interior cavity.

8 . The cover of claim 7 , further comprising a filter material disposed in the gap.

9 . An optical subassembly comprising:
a heat sink stiffener; a barrel; a cover comprising:
a plurality of walls that defines an interior cavity within the plurality of walls;
one or more supports that extend from one or more walls of the plurality of walls, each of the one or more supports weldable to the heat sink stiffener; and
an opening disposed in a wall of the plurality of walls, the opening sized and shaped to receive at least a portion of the barrel such that optical signals are transmittable between the interior cavity and the barrel; and
a flex circuit, including a portion of the flex circuit received into the interior cavity and a portion positioned externally.

10 . The optical subassembly of claim 9 , further comprising:
a laser coupled to the flex circuit and configured to emit the optical signals; and a lens positioned between the laser and the barrel, wherein the lens and the laser are both positioned within the interior cavity.

11 . The optical subassembly of claim 10 , further comprising:
a driver electrically coupled to the laser; and a power detection monitor (PDM) positioned to detect power of the laser, wherein the driver and the PDM are both positioned within the interior cavity.

12 . The optical subassembly of claim 11 , wherein the laser, the lens, the driver, and the PDM are positioned between a top wall of the cover and the heat sink stiffener.

13 . The optical subassembly of claim 9 , wherein the one or more supports include a welding surface that is weldable to the heat sink stiffener.

14 . The optical subassembly of claim 13 , wherein each of the one or more supports is tapered such that a first portion of the one or more supports is narrower than a second portion of the one or more supports, the first portion more proximate to the welding surface than the second portion.

15 . The optical subassembly of claim 13 , wherein the welding surface of the one or more supports is perpendicular to each wall of the plurality of walls.

16 . The optical subassembly of claim 13 , wherein the welding surface of the one or more supports does not exceed one or more respective planes defined by the plurality of walls.

17 . A module comprising:
a housing that defines a housing cavity; a heat sink stiffener disposed within the housing cavity; a barrel disposed within the housing cavity; a cover disposed within the housing cavity, the cover comprising:
a plurality of walls that defines an interior cavity within the plurality of walls;
one or more supports that extend from one or more walls of the plurality of walls, each of the one or more supports weldable to the heat sink stiffener; and
an opening disposed in a wall of the plurality of walls, the opening sized and shaped to receive at least a portion of the barrel such that optical signals are transmittable between the interior cavity and the barrel; and
a flex circuit disposed within the housing cavity, at least a portion of the flex circuit received into the interior cavity of the cover and another portion positioned external to the cover, and the flex circuit communicatively coupled to a host device.

18 . The module of claim 17 , further comprising:
a laser coupled to the flex circuit and configured to emit the optical signals; a lens positioned between the laser and the barrel; a driver electrically coupled to the laser; and a power detection monitor (PDM) positioned to detect power of the laser, wherein the laser, the lens, the driver, and the PDM are each positioned within the interior cavity.

19 . The module of claim 18 , wherein the laser, the lens, the driver, and the PDM are positioned between a top wall of the cover and the heat sink stiffener.

20 . The module of claim 17 , wherein:
the one or more supports of the cover includes a welding surface that is weldable to the heat sink stiffener; each of the one or more supports is tapered such that a first portion of the one or more supports is narrower than a second portion of the one or more supports, the first portion more proximate to the welding surface than the second portion; the welding surface of the one or more supports is perpendicular to each wall of the plurality of walls; and the welding surface of the one or more supports does not exceed one or more respective planes defined by the plurality of walls.

Assignees

• Finisar Corp

Inventors

• Ding Frank Lei
• Amirkiai Maziar
• Mu Jianwei
• Deng Hongyu
• Wu Tao

Classifications

• H05K2201/10121

  Optical component, e.g. opto-electronic component · CPC title

• H05K1/189

  characterised by the use of flexible or folded printed circuits · CPC title

• G02B6/4292 Primary

  the light guide being disconnectable from the opto-electronic element, e.g. mutually self aligning arrangements · CPC title

• G02B6/4256 Primary

  Details of housings · CPC title

• G02B6/4281

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