US4924276A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Optoelectronic component
Assignee: Telefunken Electronic GmbH
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Filing: 1988-08-17
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Granted: 1990-05-08
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Expires: 2008-08-17
Abstract
Abstract Optoelectronic components, in particular those comprising a line of luminescent diodes arranged in a row, are provided according to the prior art with contacts that have a number of disadvantages, some of which are that the light efficiency is relatively low and that irregularities in the light efficiency of a row occur due to incorrect adjustments of the contacts. According to the invention the contact is therefore designed as a contact bridge passing transversely over the contact window, so that on the one hand only a small amount of light-emitting surface is covered and a high light power thereby attained, and on the other hand the regularity of the light efficiency is independent of any misalignment of the contact bridge.
Inventors
- 👤 Axel Heime
- 👤 Gerhard Rosin-Schroder
- 👤 Werner Schairer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 21:05
CPC Classifications
H; H10; H10H; H10H20/00; H10H20/80; H10H20/83; H10H20/831; H10H29/00; H10H29/10; H10H29/14
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
86 words
An optoelectronic component that is made from a semiconductor element (1) containing at least one p-n junction (2), and that has one rear contact (4) on the semiconductor element (1) and one front contact (5) in a contact window (6) located in a passivation layer (3), wherein the front contact (5) comprises a narrow contact bridge (5a) passing transversely over the contact window (6) in such a way that it projects beyond said window (6) on both sides and divides said window (6) into two areas.
Claim 2
Dependent Claim
86 words
An optoelectronic component that is made from a semiconductor element (1) containing at least one p-n junction (2), and that has one rear contact (4) on the semiconductor element (1) and one front contact (5) in a contact window (6) located in a passivation layer (3), wherein the front contact (5) comprises a narrow contact bridge (5a) passing transversely over the contact window (6) in such a way that it projects beyond said window (6) on both sides and divides said window (6) into two areas.
Claim 3
Dependent Claim
33 words
An optoelectronic component according to claim 1, wherein the contact bridge (5a) is designed so narrow that it takes up not more than one quarter of the area of the contact window (6).
Claim 4
Dependent Claim
25 words
An optoelectronic component according to claim 2, wherein the contact bridge (5a) merges into an adjoining conducting path (7) that widens into a cone shape.
Claim 5
Dependent Claim
37 words
An optoelectronic component according to claim 2, wherein the width of the contact bridge (5a) is between 5 and 10 μm in a contact window (6) designed square and having an edge length of approx. 40 μm.
Claim 6
Dependent Claim
34 words
An optoelectronic component according to claim 4, wherein the contact bridge (5a) has a width of approx. 8 μm and the contact bridge (5a) passes largely over the centre of the contact window (6).
Claim 7
Dependent Claim
31 words
An optoelectronic component according to claim 2, wherein a large number light-emitting diodes arranged in a row and integrated in a common semiconductor element (1) are provided with contact bridges (5a).
Claim 8
Dependent Claim
43 words
An optoelectronic component according to claim 6, wherein the contact bridge (5a) of the light-emitting diodes run parallel to one another on the semiconductor element (1) and the adjoining conducting paths (7) are arranged alternately on each side of the light-emitting diode row.
Claim 9
Dependent Claim
17 words
In a display, printer line or screen, the improvement comprising the optoelectronic component according to claim 1.
References Cited (Backward Citations)
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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) | 1993-05-07 | 1993-11-06 | 1994-05-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-05-07 | 1997-11-06 | 1998-05-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-05-07 | 2001-11-06 | 2002-05-08 | $7700.00 | Window Closed / Lapsed |