US5578871A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Integrated circuit package and method of making the same
Assignee: FiTel Innovations
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Filing: 1994-10-18
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Granted: 1996-11-26
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Expires: 2014-10-18
Abstract
Abstract A leadframe strip is provided with a die pad and a protrusion is formed on the die pad so as to project from the rear side thereof. An integrated circuit chip is bonded to the front side of the die pad and is connected by leads to portions of the leadframe strip adjacent the die pad. The die pad, chip and leads are placed in a mold and an epoxy is injected into the mold to encapsulate the die pad, chip and leads. The protrusion spaces the die pad from the internal mold surface confronting the rear side of the die pad.
Inventors
- 👤 Richard H. J. Fierkens
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 14:41
CPC Classifications
H; H10; H10W; H10W76/00; H10W76/10; H10W76/17; H10W76/18; H10W74/00; H10W74/01; H10W74/016; H10W70/00; H10W70/40; H10W70/411; H10W76/12; H10W76/161; H10W76/60; H10W72/00; H10W72/071; H10W72/073; H10W72/07351; H10W72/07353; H10W72/30; H10W72/331; H10W72/334; H10W72/851; H10W72/874; H10W72/884; H10W72/90; H10W72/931; H10W90/00; H10W90/701; H10W90/731; H10W90/736; H10W90/751; H10W90/756
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
172 words
An integrated circuit package comprising, in combination: a one-piece, self-supporting substrate having a mounting location, said mounting location having a first side and a second side facing away from said first side; an integrated circuit chip secured to said first side of said mounting location, said mounting location being provided with a pointed protrusion which projects from said second side; a plastic enclosure for said mounting location and said chip, said plastic enclosure having an external peripheral surface, said second side is spaced from said peripheral surface, said pointed protrusion extending from said second side into contact with said peripheral surface of said plastic enclosure, wherein the point of said pointed protrusion lies in a same plane as said external peripheral surface; and said substrate has a first portion which is in a plane and a second portion which is bent out of said plane and includes said mounting location, said first side of said mounting location spaced from said plane, said protrusion is substantially centered with respect to said mounting location.
Claim 2
Dependent Claim
172 words
An integrated circuit package comprising, in combination: a one-piece, self-supporting substrate having a mounting location, said mounting location having a first side and a second side facing away from said first side; an integrated circuit chip secured to said first side of said mounting location, said mounting location being provided with a pointed protrusion which projects from said second side; a plastic enclosure for said mounting location and said chip, said plastic enclosure having an external peripheral surface, said second side is spaced from said peripheral surface, said pointed protrusion extending from said second side into contact with said peripheral surface of said plastic enclosure, wherein the point of said pointed protrusion lies in a same plane as said external peripheral surface; and said substrate has a first portion which is in a plane and a second portion which is bent out of said plane and includes said mounting location, said first side of said mounting location spaced from said plane, said protrusion is substantially centered with respect to said mounting location.
Claim 3
Dependent Claim
14 words
The package of claim 1 wherein said protrusion comprises a dimple in said substrate.
Claim 4
Dependent Claim
11 words
The package of claim 1 wherein said enclosure comprises an epoxy.
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) | 1999-11-26 | 2000-05-27 | 2000-11-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-11-26 | 2004-05-27 | 2004-11-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-11-26 | 2008-05-27 | 2008-11-26 | $7700.00 | Window Closed / Lapsed |