Patent US4595945A successfully refreshed from Google Patents.
US4595945A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Plastic package with lead frame crossunder
Assignee: Nokia Bell Labs
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Filing: 1983-10-21
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Granted: 1986-06-17
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Expires: 2003-10-21
Abstract
Abstract Proposed is a new way to distribute power off chip using a specially designed lead frame. The support paddle of the lead frame is split electrically and provides at least two conductor members that are arranged to cross under the chip after the chip is bonded to the paddle. Power and/or ground can be distributed to two or more edges of the chip by providing bonding sites at or near the extremities of the crossunders. The chip itself is electrically isolated from the crossunder members.
Inventors
- 👤 Ronald N. Graver
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 12:43
CPC Classifications
H; H10; H10W; H10W70/00; H10W70/40; H10W70/411; H10W70/475; H10W70/60; H10W70/67; H10W70/68; H10W70/682; H10W70/685; H10W72/00; H10W72/071; H10W72/075; H10W72/07551; H10W72/07554; H10W72/50; H10W72/531; H10W72/536; H10W72/5363; H10W72/541; H10W72/547; H10W74/00; H10W90/00; H10W90/701; H10W90/751; H10W90/754
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
160 words
A lead frame device comprising: a metal lead frame having a central support member and a plurality of leads extending from the vicinity of the central support member outward, a semiconductor chip supported directly by the central support member, conductive members attached from sites on the semiconductor chip to the plurality of leads, and a plastic material commonly encapsulating the semiconductor chip, the central support member, the conductive members, and a portion of each of the plurality of leads, leaving a portion of each of the leads extending beyond the plastic encapsulant, the invention characterized in that the central support member is segmented into at least two electrically separate portions at least one of which forms a crossunder and extends from beyond one edge of the chip to beyond an opposing edge of the chip, conductive members attached from the chip to each end of the crossunder portion, and insulating means electrically insulating the chip from the central support member.
Claim 2
Dependent Claim
160 words
A lead frame device comprising: a metal lead frame having a central support member and a plurality of leads extending from the vicinity of the central support member outward, a semiconductor chip supported directly by the central support member, conductive members attached from sites on the semiconductor chip to the plurality of leads, and a plastic material commonly encapsulating the semiconductor chip, the central support member, the conductive members, and a portion of each of the plurality of leads, leaving a portion of each of the leads extending beyond the plastic encapsulant, the invention characterized in that the central support member is segmented into at least two electrically separate portions at least one of which forms a crossunder and extends from beyond one edge of the chip to beyond an opposing edge of the chip, conductive members attached from the chip to each end of the crossunder portion, and insulating means electrically insulating the chip from the central support member.
Claim 3
Dependent Claim
30 words
The device of claim 1 further including a conductive layer interposed between the chip and the insulating means and a conductive member bonded between said conductive layer and the chip.
Claim 4
Dependent Claim
17 words
The device of claim 1 having a capacitor bonded across two segments of the central support member.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-06-16 | 1989-12-16 | 1990-06-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-06-16 | 1993-12-16 | 1994-06-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-06-16 | 1997-12-16 | 1998-06-17 | $7700.00 | Window Closed / Lapsed |