US4812896A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Metal electronic package sealed with thermoplastic having a grafted metal deactivator and antioxidant
Assignee: Advanced Technology Interconnect Inc
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Filing: 1986-11-13
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Granted: 1989-03-14
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Expires: 2006-11-13
Abstract
Abstract A package and process of assembling a package adapted for housing an electronic component. The package includes metallic base, lid and leadframe components sealed together with a thermoplastic material. The thermoplastic has an additive consisting essentially of a metal deactivator and a primary antioxidant grafted thereto without cross linking so as to maintain the thermoplastic properties.
Inventors
- 👤 Eugene F. Rothgery
- 👤 William W. C. Hart
- 👤 Edward F. Smith, III
- 👤 Steven D. Phillips
- 👤 Bonnie B. Sandel
- 👤 David F. Gavin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 01:06
CPC Classifications
H; H10; H10W; H10W76/00; H10W76/60; H10W70/00; H10W70/60; H10W70/67; H10W70/68; H10W70/682; H10W70/685; H10W72/00; H10W72/50; H10W72/551; H10W72/552; H10W72/5522; H10W74/00; H10W90/00; H10W90/701; H10W90/751; H10W90/756
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
76 words
A package adapted for housing an electronic component, comprising: a metallic base component; a metallic lid component; a leadframe disposed between said base component and said lid component; a thermoplastic material sealing said leadframe between said lid and base components; said thermoplastic material comprising a polyolefin having an additive, said additive consisting essentially of a metal deactivator and a primary antioxidant, said additive grafted to said polyolefin without cross linking so as to maintain thermoplastic properties.
Claim 2
Dependent Claim
76 words
A package adapted for housing an electronic component, comprising: a metallic base component; a metallic lid component; a leadframe disposed between said base component and said lid component; a thermoplastic material sealing said leadframe between said lid and base components; said thermoplastic material comprising a polyolefin having an additive, said additive consisting essentially of a metal deactivator and a primary antioxidant, said additive grafted to said polyolefin without cross linking so as to maintain thermoplastic properties.
Claim 3
Dependent Claim
33 words
The package of claim 1 including said thermoplastic being a polyolefin selected from the group consisting essentially of polyethylene, polypropylene, and poly(4-methyl-pentene) or copolymers with alkenes such as ethylene, propylene, 1-hexene and 1-butene.
Claim 4
Dependent Claim
23 words
The package of claim 2 including said metal deactivator and said primary antioxidant being a compound, said compound being benzylidene maleic hydrazide, ##STR2##
Claim 5
Dependent Claim
29 words
The package of claim 3 wherein said metallic base and lid are formed from the group of metallic materials consisting essentially of copper, aluminum, nickel, iron and alloys thereof.
Claim 6
Dependent Claim
23 words
The package of claim 2 including said metal deactivator and said primary antioxidant being a compound, said compound being bis(4-oxyalkylated-2,6-dialkylphenol)adducts of ethylenediaminetetraacetic acid.
Claim 7
Dependent Claim
18 words
The package of claim 5 wherein said bis(4-oxyalkylated-2,6-dialkylphenol)adducts of ethylenediaminetetraacetic acid includes an ethylenediaminetetraacetic acid symmetric bis[2-(3,5-di-tert-butyl-4-hydroxyphenyl)propyl] ester.
Claim 8
Dependent Claim
29 words
The package of claim 2 including said metal deactivator and said primary antioxidant being a compound, said compound being the maleic dimethylhydrazide, (CH 3 ) 2 NNH--CO--CH═CH--CO 2 H.
Claim 9
Dependent Claim
21 words
The package of claim 4 wherein said thermoplastic material bonds said leadframe to said base component and to said lid component.
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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) | 1992-03-13 | 1992-09-12 | 1993-03-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-03-13 | 1996-09-12 | 1997-03-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-03-13 | 2000-09-12 | 2001-03-14 | $7700.00 | Window Closed / Lapsed |