IP Library Granted Patent US 7,258,264
Granted Patent B2
US 7,258,264 · App. 11/066,056 · Granted Aug 21, 2007

Methods for manufacturing optical modules using lead frame connectors

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Quick Facts
Patent No.
US 7,258,264
App. No.
11/066,056
Granted
Aug 21, 2007
Kind
B2
Abstract

Methods of manufacturing optical transceiver modules using lead frame connectors that connect optical sub-assemblies to printed circuit boards are disclosed. The lead frame connector includes an electrically insulating case having a first part separated from a second part and a plurality of conductors that are electrically isolated one from another by the electrically insulating case. Each of the plurality of conductors can form an electrical contact restrained in a fixed position with respect to the first part and a contact point extending from the second part. The electrical contact is aligned with and soldered to the leads that protrude from the back end of an optical sub-assembly. The contact points can then be connected to electrical pads on a PCB.

Claims (21)

1. A method of manufacturing an optical transceiver module, the method comprising:

positioning a lead frame connector for attachment to an optical sub-assembly of the optical transceiver module, the lead frame connector comprising a plurality of electrically isolated conductors disposed within an electrically insulating case having a first part separated from a second part, each of the plurality of conductors forming an electrical contact restrained in a fixed position with respect to the first part and a contact point extending from and movable relative to the second part;

connecting the plurality of electrical contacts to corresponding leads of the optical sub-assembly to obtain a combined structure that includes the lead frame connector and the optical sub-assembly; and

connecting the plurality of contact points to corresponding conductive structures on a printed circuit board of the optical transceiver module to electrically connect the optical sub-assembly to the printed circuit board, wherein connecting the plurality of contact points includes:

bending the conductors at a first location between the first part and the second part; and

bending the conductors at a second location adjacent the contact points to align the contact points with the conductive structures;

wherein the first location is different from the second location.

2. The method as defined in claim 1 , wherein connecting the plurality of electrical contacts comprises:

passing each of the leads of the optical sub-assembly through a hole in the corresponding electrical contact; and

soldering the leads to the corresponding electrical contacts.

3. The method as defined in claim 2 , wherein soldering the leads to the corresponding electrical contacts is performed by applying the solder to the electrical contacts at a side of the lead frame connector that is opposite a side that is adjacent to the optical sub-assembly.

4. The method as defined in claim 1 , wherein connecting the plurality of contact points of the lead frame connector to the corresponding conductive structures on a printed circuit board comprises:

placing the contact points of the lead frame connector in contact with the corresponding conductive structures; and

soldering the contact points to the conductive structures.

5. The method as defined in claim 1 , wherein connecting the plurality of contact points of the lead frame connector to the corresponding conductive structures on a printed circuit board comprises:

placing the contact points of the lead frame connector in contact with the corresponding conductive structures; and

connecting the contact points to the conductive structures using one of a hand soldering process, a hot bar process, an infrared reflow process, a hot air reflow process and a laser soldering process.

6. The method as defined in claim 1 , wherein said optical sub-assembly is an optical sub-assembly selected from the group consisting of a transmitter optical sub-assembly or a receiver optical sub-assembly.

7. The method as defined in claim 1 , wherein connecting the plurality of electrical contacts to corresponding leads comprises self-aligning of the lead frame connector with respect to the optical sub-assembly as the corresponding leads pass through holes in the electrical contacts.

8. The method as defined in claim 1 , wherein the lead frame connector meets at least a portion of the requirements outlined in the 2002/95/EC Reduction of Hazardous Substances (ROHS) Directive.

9. The method as defined in claim 1 , wherein the lead frame is connected to the printed circuit board without the use of lead solder.

Assignments (3)
PATENT RELEASE AND REASSIGNMENT Recorded Jul 5, 2022
From: BANK OF AMERICA, N.A., AS ADMINISTRATIVE AGENT
To: II-VI INCORPORATED; MARLOW INDUSTRIES, INC.; EPIWORKS, INC.; LIGHTSMYTH TECHNOLOGIES, INC.; KAILIGHT PHOTONICS, INC.; COADNA PHOTONICS, INC.; OPTIUM CORPORATION; FINISAR CORPORATION; II-VI OPTICAL SYSTEMS, INC.; M CUBED TECHNOLOGIES, INC.; II-VI PHOTONICS (US), INC.; II-VI DELAWARE, INC.; II-VI OPTOELECTRONIC DEVICES, INC.; PHOTOP TECHNOLOGIES, INC.
Reel/Frame 060574/0001 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Apr 1, 2020
From: FINISAR CORPORATION
To: II-VI DELAWARE, INC.
Reel/Frame 052286/0001 →
NOTICE OF GRANT OF SECURITY INTEREST IN PATENTS Recorded Sep 25, 2019
From: II-VI INCORPORATED; MARLOW INDUSTRIES, INC.; EPIWORKS, INC.; LIGHTSMYTH TECHNOLOGIES, INC.; KAILIGHT PHOTONICS, INC.; COADNA PHOTONICS, INC.; OPTIUM CORPORATION; FINISAR CORPORATION; II-VI OPTICAL SYSTEMS, INC.; M CUBED TECHNOLOGIES, INC.; II-VI PHOTONICS (US), INC.; II-VI DELAWARE, INC.; II-VI OPTOELECTRONIC DEVICES, INC.; PHOTOP TECHNOLOGIES, INC.
To: BANK OF AMERICA, N.A., AS ADMINISTRATIVE AGENT
Reel/Frame 050484/0204 →