US5656854A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lead frame for a multiplicity of terminals
Assignee: LSI Logic Products GmbH
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Filing: 1995-11-13
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Granted: 1997-08-12
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Expires: 2015-11-13
Abstract
Abstract A lead frame for a multiplicity of terminals, in particular of large-scale integrated semiconductor chips, arranged in a very confined space and consisting of metallic conductors which converge from large outer spacings toward the terminals and can be connected to the terminals. The lead frame allows a high number of terminals with a low degree of spacing of the conductors to be produced. The conductors are produced in the outer region by a conventional production method and at their ends pointing toward the terminals by laser cutting of a uniformly metallic material.
Inventors
- 👤 Hugo Westerkamp
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 13:50
CPC Classifications
H; H10; H10W; H10W70/00; H10W70/01; H10W70/04; H10W70/40; H10W70/421; H10W72/00; H10W72/50; H10W72/541; H10W72/5449; H10W72/551; H10W72/90; H10W72/931; H10W72/932; H10W90/00; H10W90/701; H10W90/751; H10W90/756
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
90 words
An apparatus, comprising: a bonding pad for receiving a semiconductor integrated circuit having a plurality of terminals; and a lead frame including a plurality of metallic conductors adapted to be connected to respective ones of the plurality of terminals, the metallic conductors having a uniform thickness and, in an inner region adjacent the bonding pad, a spacing between themselves which is no greater than 70% of the uniform thickness; and respective longitudinal axes, each of which extends in a single straight line from the inner region to an outer region.
Claim 2
Independent Claim
90 words
An apparatus, comprising: a bonding pad for receiving a semiconductor integrated circuit having a plurality of terminals; and a lead frame including a plurality of metallic conductors adapted to be connected to respective ones of the plurality of terminals, the metallic conductors having a uniform thickness and, in an inner region adjacent the bonding pad, a spacing between themselves which is no greater than 70% of the uniform thickness; and respective longitudinal axes, each of which extends in a single straight line from the inner region to an outer region.
Claim 3
Dependent Claim
16 words
The apparatus of claim 1, wherein the uniform thickness ranges from 0.125 mm to 0.15 mm.
Claim 4
Dependent Claim
22 words
The apparatus of claim 1, wherein a spacing between the conductors in the outer region ranges from 0.15 mm to 0.3 mm.
Claim 5
Dependent Claim
27 words
The apparatus of claim 1, wherein a ratio of a spacing between the conductors in the outer region to the uniform thickness ranges from 1.2 to 2.
Claim 6
Dependent Claim
33 words
The apparatus of claim 1, wherein a ratio of a spacing between the conductors in the outer region to the spacing between the conductors in the inner region ranges from 3 to 4.
Claim 7
Dependent Claim
33 words
The apparatus of claim 1, wherein longitudinal outside edges of the conductors converge toward the respective longitudinal axes in the inner region and diverge from the respective longitudinal axes in the outer region.
Claim 8
Dependent Claim
18 words
The apparatus of claim 1, wherein the spacing in the inner region between pairs of conductors is uniform.
Claim 9
Dependent Claim
18 words
The apparatus of claim 1, wherein a spacing in the outer region between pairs of conductors is uniform.
Claim 10
Dependent Claim
13 words
The apparatus of claim 1, wherein the longitudinal axes converge towards one another.
Claim 11
Dependent Claim
22 words
The apparatus of claim 1, wherein the spacing between the conductors in the inner region ranges from 0.05 mm to 0.07 mm.
Claim 12
Dependent Claim
24 words
The apparatus of claim 1, wherein the spacing between the conductors in the inner region is no more than 50% of the uniform thickness.
Claim 13
Dependent Claim
24 words
The apparatus of claim 1, wherein the spacing between the conductors in the inner region is no more than 35% of the uniform thickness.
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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) | 2000-08-11 | 2001-02-10 | 2001-08-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2004-08-11 | 2005-02-10 | 2005-08-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2008-08-11 | 2009-02-10 | 2009-08-12 | $7700.00 | Window Closed / Lapsed |