US4893169A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lead frame and a process for the production of a lead with this lead frame
Assignee: Siemens AG
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Filing: 1988-03-28
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Granted: 1990-01-09
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Expires: 2008-03-28
Abstract
Abstract A lead frame adapted for a plurality of semiconductor chips in which, for each semiconductor chip, at least one electric terminal is extended out of the package after encapsulation of the lead frame. In addition, a process for the production of a lead with this lead frame, enables a full automation of the lead assembly and good, reliable production. The lead frame has at least one mechanical node (T1, T2, T3, T4; T) at which, by severing a single reinforced node, at least three electric conductors (1, 2, G; 3, 4, G; 5, 6, G; 7, 8, G; 21, 22, 23) are electrically separated from one another.
Inventors
- 👤 Helmut Rusch
- 👤 Guenter Waitl
- 👤 Hansjoerg Harrasser
- 👤 Hans-Juergen Richter
- 👤 Lee Francis
- 👤 Alois Seidl
- 👤 Hans Wissinger
- 👤 Hans-Joachim Hampel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 19:57
CPC Classifications
H; H10; H10W; H10W90/00; H10W90/811; H10W70/00; H10W70/01; H10W70/04; H10W70/048
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
153 words
A lead frame carrier for semiconductor chips for encapsulation into a package, the lead frame carrier comprising a patterned area for a plurality of semiconductor chips including a plurality of first electrical leads each one of the plurality of semiconductor chips having a first electrical lead extending outward from a region selected for encapsulation to provide a plurality of external leads, the patterned area including a common conductor having a plurality of semiconductor chip receiving areas within the region and extending outward from the region to provide at least one external connection, a plurality of connecting points located in the region, each connecting point connected between at least one of said first electric leads and the common conductor for providing mechanical rigidity for the lead frame carrier through their connections and each connecting point having a reduced cross sectional area coupling between the common conductor and each one of the selected electrical leads.
Claim 2
Dependent Claim
153 words
A lead frame carrier for semiconductor chips for encapsulation into a package, the lead frame carrier comprising a patterned area for a plurality of semiconductor chips including a plurality of first electrical leads each one of the plurality of semiconductor chips having a first electrical lead extending outward from a region selected for encapsulation to provide a plurality of external leads, the patterned area including a common conductor having a plurality of semiconductor chip receiving areas within the region and extending outward from the region to provide at least one external connection, a plurality of connecting points located in the region, each connecting point connected between at least one of said first electric leads and the common conductor for providing mechanical rigidity for the lead frame carrier through their connections and each connecting point having a reduced cross sectional area coupling between the common conductor and each one of the selected electrical leads.
Claim 3
Dependent Claim
38 words
A lead frame carrier in accordance with claim 1 further comprising patterned areas wherein selected ones of the external leads mechanically couple patterned areas of the lead frame carrier together to provide a strip of successive patterned areas.
Claim 4
Dependent Claim
18 words
A lead frame carrier in accordance with claim 1, wherein the common conductor is connected to ground potential.
Claim 5
Dependent Claim
51 words
A lead frame carrier in accordance with claim 1, wherein the plurality of semiconductor chips comprises eight discrete semiconductor chips forming an LED display element and the plurality of connecting points comprises four mechanical nodes each mechanically connected to a semiconductor chip receiving area and two of said first electrical leads.
Claim 6
Dependent Claim
34 words
A lead frame carrier in accordance with claim 4, wherein the four connecting points are spatially arranged within the region of the lead frame carrier to form corners of a four sided planar area.
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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) | 1993-01-08 | 1993-07-10 | 1994-01-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-01-08 | 1997-07-10 | 1998-01-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-01-08 | 2001-07-10 | 2002-01-09 | $7700.00 | Window Closed / Lapsed |