OPTICAL MODULE

• US 20160313519A1
• Filed: 03/16/2016
• Published: 10/27/2016
• Est. Priority Date: 04/23/2015
• Status: Active Grant

• Current Assignee: Shinko Electric Industries Company Limited (Fujitsu Limited)
• Original Assignee: Shinko Electric Industries Company Limited (Fujitsu Limited)
• Inventors: Yanagisawa, Kenji
• Granted Patent: US 9,651,748 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: G02B 6/30 for use between fibre and thin-film device
• CPC Class Codes: G02B 6/322 and having centering means being part of the lens for the self-positioning of the lightguide at the focal point, e.g. holes, wells, indents, nibs
• CPC Class Codes: G02B 6/4206 Optical features G02B6/4207, G02B6/421 take precedence
• CPC Class Codes: G02B 6/4214 the intermediate optical element having redirecting reflective means, e.g. mirrors, prisms for deflecting the radiation from horizontal to down- or upward direction toward a device G02B6/4246 takes precedence
• CPC Class Codes: G02B 6/4238 Soldering
• CPC Class Codes: G02B 6/4239 Adhesive bonding; Encapsulation with polymer material
• CPC Class Codes: G02B 6/4244 Mounting of the optical elements
• CPC Class Codes: G02B 6/428 containing printed circuit boards [PCB]
• CPC Class Codes: G02B 6/43 Arrangements comprising a plurality of opto-electronic elements and associated optical interconnections

Abstract

An optical module includes: an optical/electrical composite board including: a wiring board; an optical waveguide disposed on the wiring board; and a first optical path changing portion disposed at one end portion of the optical waveguide, a lens component including a lens configured to collect the light emitted from the optical path changing portion; and a fixation member fixed to the optical/electrical composite board. A through hole is formed through the lens component. The lens component is disposed on the optical/electrical composite board such that the fixation member is disposed in the through hole. A resin portion is provided in the through hole such that the fixation member is embedded in the resin portion.

Claims

1. An optical module comprising:

an optical/electrical composite board comprising;

a wiring board;

an optical waveguide disposed on the wiring board and configured to guide light; and

a first optical path changing portion disposed at one end portion of the optical waveguide to change an optical path of the light travelling in the optical waveguide,

a lens component comprising a lens configured to collect the light emitted from the optical path changing portion; and

a fixation member fixed to the optical/electrical composite board,

wherein

a through hole is formed through the lens component,

the lens component is disposed on the optical/electrical composite board such that the fixation member is disposed in the through hole, and

a resin portion is provided in the through hole such that the fixation member is embedded in the resin portion.

2. The optical module of claim 1, wherein the fixation member is solder bonded to the optical/electrical composite board.

3. The optical module of claim 1, wherein

the fixation member has an opposing surface opposed to the optical/electrical composite board with a certain distance therebetween, and

at least a portion of the resin portion is provided in a space between the optical/electrical composite board and the opposing surface of the fixation member so as to contact the opposing surface.

4. The optical module of claim 1, wherein

the lens component further comprises a protrusion portion protruding from an inner circumferential surface defining the through hole, and

the protrusion portion is embedded in the resin portion.

5. The optical module of claim 1, wherein

the lens component has a central section where the lens is arranged, and a peripheral section where the through hole is formed,

a step is formed in a boundary between a lower surface of the central section, which is opposed to the optical/electrical composite board, and a lower surface of the peripheral section, which is opposed to the optical/electrical composite board, and

a gap is formed between the lower surface of the central section and the optical/electrical composite board.

6. The optical module of claim 1, wherein

the lens component further comprises a mounting portion configured to allow an optical fiber connector to be mounted on the lens component, and

the optical fiber connector is attached to an end portion of an optical fiber configured to receive the light collected by the lens.

7. The optical module of claim 1, further comprising an optical element disposed on the optical/electrical composite board, and

wherein the optical/electrical composite board further comprises a second optical path changing portion disposed at the other end portion of the optical waveguide and configured to optically couple the optical element and the optical waveguide.