Patent US4857746A successfully refreshed from Google Patents.
US4857746A
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Method for producing an optocoupler
Assignee: Siemens AG
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Filing: 1987-09-28
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Granted: 1989-08-15
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Expires: 2007-09-28
Abstract
Abstract In order to manufacture respectively optocouplers or reflex light barriers particularly efficiently, semiconductor light transmitters and semiconductor light receivers are situated on a single substrate. The optic coupling or optic isolation of light transmitter and light receiver takes place in the substrate. Only then are semiconductor elements separated into discrete units.
Inventors
- 👤 Werner Kuhlmann
- 👤 Werner Spaeth
- 👤 Guenter Waitl
- 👤 Joerg Klann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 17:30
CPC Classifications
G; G01; G01V; G01V8/00; G01V8/10; G01V8/12; H; H10; H10F; H10F55/00; H10F55/20; H10F55/25; H10W; H10W90/00; H10W90/701; H10W90/721; H10W90/722
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
89 words
A method for manufacturing optocouplers comprising the steps of: forming arrays of semiconductor light transmitters and semiconductor light receivers arranged on opposite sides of a single substrate wafer, forming reflective light barriers respectively covering the light transmitters on the side of the wafer opposite the light receivers, optically coupling through the wafer and by reflection off the respective light barriers each one of the transmitters to at least one of the light receivers thus forming respective optocouplers on the wafer, and subsequently separating the respective optocouplers into discrete units.
Claim 2
Independent Claim
89 words
A method for manufacturing optocouplers comprising the steps of: forming arrays of semiconductor light transmitters and semiconductor light receivers arranged on opposite sides of a single substrate wafer, forming reflective light barriers respectively covering the light transmitters on the side of the wafer opposite the light receivers, optically coupling through the wafer and by reflection off the respective light barriers each one of the transmitters to at least one of the light receivers thus forming respective optocouplers on the wafer, and subsequently separating the respective optocouplers into discrete units.
Claim 3
Dependent Claim
18 words
A method according to claim 1, wherein testing of the optocouplers occurs in the array and before separation.
Claim 4
Dependent Claim
21 words
A method according to claim 1, further comprising the step of placing each one of the optocouplers on a lead frame.
Claim 5
Dependent Claim
14 words
A method according to claim 1, further comprising encapsulating each one of the optocouplers.
References Cited (Backward Citations)
US3229104A
Cited
US3914137A
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FR2228303A1
Cited
US4040078A
Cited
US4275404A
Cited
DE3233177A1
Cited
EP0150929A2
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-08-14 | 1993-02-13 | 1993-08-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-08-14 | 1997-02-13 | 1997-08-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-08-14 | 2001-02-13 | 2001-08-15 | $7700.00 | Window Closed / Lapsed |