Patent US5808325A successfully refreshed from Google Patents.
US5808325A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Optical transmitter package assembly including lead frame having exposed flange with key
Assignee: Seiko Epson Corp
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Filing: 1996-06-28
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Granted: 1998-09-15
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Expires: 2016-06-28
Abstract
Abstract A package assembly (31) has a leadframe (10) including a locating flange (30), an optical transmitter (22) such as a laser diode mounted to the leadframe, and a package (32) enclosing both the optical transmitter and a portion of the leadframe so that the locating flange of the leadframe is disposed outside of the package. The locating flange is used as a reference datum to align the optical transmitter's relative height and lateral position during manufacture. Also, the locating flange is used as a reference datum in mating the package assembly to other, standard optical components when mounting to other components in an optical end product.
Inventors
- 👤 Brian A. Webb
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 12:55
CPC Classifications
H; H10; H10H; H10H20/00; H10H20/80; H10H20/85; H10H20/857; H01; H01S; H01S5/00; H01S5/02; H01S5/022; H01S5/023; H01S5/0232; H10W; H10W90/00; H01S5/02218; H01S5/02234; H10H20/855; H10W90/701; H10W90/751; H10W90/756
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
129 words
A package assembly comprising: a leadframe comprising a flag and at least three leads, wherein a first lead of said at least three leads is integral with said flag and said flag further includes a locating flange disposed around a periphery of said flag and having at least one key formed in said locating flange; an optical transmitter mounted to said flag at a height and lateral alignment determined in response to said locating flange and said at least one key; a package enclosing said optical transmitter and a portion of said leadframe so that said locating flange and said at least one key are disposed outside of said package; and an optical element mounted to said package above said optical transmitter and optically coupled to said optical transmitter.
Claim 2
Dependent Claim
129 words
A package assembly comprising: a leadframe comprising a flag and at least three leads, wherein a first lead of said at least three leads is integral with said flag and said flag further includes a locating flange disposed around a periphery of said flag and having at least one key formed in said locating flange; an optical transmitter mounted to said flag at a height and lateral alignment determined in response to said locating flange and said at least one key; a package enclosing said optical transmitter and a portion of said leadframe so that said locating flange and said at least one key are disposed outside of said package; and an optical element mounted to said package above said optical transmitter and optically coupled to said optical transmitter.
Claim 3
Dependent Claim
13 words
The package assembly of claim 1 wherein said package is a transparent plastic.
Claim 4
Dependent Claim
21 words
The package assembly of claim 1 wherein said at least three leads extend outward from said package and are substantially parallel.
Claim 5
Dependent Claim
22 words
The package assembly of claim 1 wherein said optical element is selected from the group consisting of a hologram and a lens.
Claim 6
Dependent Claim
14 words
The package assembly of claim 1 wherein said optical transmitter is a laser diode.
Claim 7
Dependent Claim
17 words
The package assembly of claim 5 wherein said laser diode is a vertical cavity surface emitting laser.
Claim 8
Dependent Claim
23 words
The package assembly of claim 1 wherein said leadframe has an elevated platform and said optical transmitter is mounted on said elevated platform.
Claim 9
Dependent Claim
23 words
The package assembly of claim 1 further comprising a pedestal mounted to said leadframe, wherein said optical transmitter is mounted on said pedestal.
Claim 10
Dependent Claim
19 words
The package assembly of claim 8 wherein said pedestal includes a stake that connects said pedestal to said leadframe.
Claim 11
Dependent Claim
15 words
The package assembly of claim 1, further comprising an optical receiver mounted to said leadframe.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2001-09-14 | 2002-03-16 | 2002-09-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-09-14 | 2006-03-16 | 2006-09-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2009-09-14 | 2010-03-16 | 2010-09-15 | $7700.00 | Window Closed / Lapsed |