US5171828A
Expired / Lapsed
US
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Copolyimide ODPA/BPDA/4,4'-ODA or P-PDA
Assignee: Occidental Chemical Corp
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Filing: 1991-08-05
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Granted: 1992-12-15
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Expires: 2011-08-05
Abstract
Abstract Polyimide copolymers are disclosed having the recurring structure <IMAGE> wherein AR is AR1 or AR2, wherein AR1 is <IMAGE> and wherein AR2 is <IMAGE> provided that the molar ratio of AR1 to AR2 is 3:1 to 1:3, and wherein AR3 is <IMAGE> These polyimides have unexpected properties which are useful in various electronic applications.
Inventors
- 👤 Timothy A. Meterko
- 👤 Rudolph F. Mundhenke
- 👤 Willis T. Schwartz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 14:07
CPC Classifications
C; C08; C08G; C08G73/00; C08G73/06; C08G73/10; C08G73/1067; C08G73/1071; C08G73/1042; H; H10; H10W; H10W70/00; H10W70/60; H10W70/67; H10W70/69; H10W70/695; Y; Y10; Y10T; Y10T428/00; Y10T428/28; Y10T428/2852; Y10T428/2896; Y10T428/29; Y10T428/2913; Y10T428/2933; Y10T428/294; Y10T428/31504; Y10T428/31678; Y10T428/31681; Y10T428/31721
Claims Analysis
Total Claims: 26
Claim 1
Independent Claim
67 words
A copolyimide having the recurring structure ##STR9## wherein AR is AR 1 or AR 2 , wherein AR 1 is ##STR10## and wherein AR 2 is ##STR11## provided that the molar ratio of AR 1 to AR 2 is 3:1 to 1:3 and wherein AR 3 is selected from the group consisting of ##STR12## provided that no endcapping reagent is used in the preparation of the polymer.
Claim 2
Dependent Claim
67 words
A copolyimide having the recurring structure ##STR9## wherein AR is AR 1 or AR 2 , wherein AR 1 is ##STR10## and wherein AR 2 is ##STR11## provided that the molar ratio of AR 1 to AR 2 is 3:1 to 1:3 and wherein AR 3 is selected from the group consisting of ##STR12## provided that no endcapping reagent is used in the preparation of the polymer.
Claim 3
Dependent Claim
21 words
A copolyimide according to claim 1 in which the molar ratio of AR 1 to AR 2 is 2:1 to 1:2.
Claim 4
Dependent Claim
21 words
A copolyimide according to claim 1 in which the molar ratio of AR 1 to AR 2 is 1.5:1 to 1:1.5.
Claim 5
Dependent Claim
19 words
A copolyimide according to claim 1 in which the molar ratio of AR 1 to AR 2 is 1:1.
Claim 6
Dependent Claim
15 words
An article comprising an electrically conductive material coated with a copolyimide according to claim 1.
Claim 7
Dependent Claim
15 words
An article comprising an electrically conductive material coated with a copolyimide according to claim 2.
Claim 8
Dependent Claim
15 words
An article comprising an electrically conductive material coated with a copolyimide according to claim 3.
Claim 9
Dependent Claim
15 words
An article comprising an electrically conductive material coated with a copolyimide according to claim 4.
Claim 10
Dependent Claim
44 words
An article in the form of a tape comprising an electrically conductive layer which may be fashioned into electrically conductive leads suitable for attachment to a semiconductor device, a layer of a copolyimide according to claim 1, and optional bonding materials between said layers.
Claim 11
Dependent Claim
44 words
An article in the form of a tape comprising an electrically conductive layer which may be fashioned into electrically conductive leads suitable for attachment to a semiconductor device, a layer of a copolyimide according to claim 2, and optional bonding materials between said layers.
Claim 12
Dependent Claim
44 words
An article in the form of a tape comprising an electrically conductive layer which may be fashioned into electrically conductive leads suitable for attachment to a semiconductor device, a layer of a copolyimide according to claim 3, and optional bonding materials between said layers.
Claim 13
Dependent Claim
44 words
An article in the form of a tape comprising an electrically conductive layer which may be fashioned into electrically conductive leads suitable for attachment to a semiconductor device, a layer of a copolyimide according to claim 4, and optional bonding materials between said layers.
Claim 14
Dependent Claim
60 words
A copolyimide having the recurring structure ##STR13## wherein AR is either AR 1 or AR 2 , wherein AR 1 is ##STR14## and wherein AR 2 is ##STR15## provided that the molar ratio of AR 1 to AR 2 is 3:1 to 1:3, and wherein AR 3 is selected from the group consisting of ##STR16## terminated by an unreactive endcap.
Claim 15
Dependent Claim
60 words
A copolyimide having the recurring structure ##STR13## wherein AR is either AR 1 or AR 2 , wherein AR 1 is ##STR14## and wherein AR 2 is ##STR15## provided that the molar ratio of AR 1 to AR 2 is 3:1 to 1:3, and wherein AR 3 is selected from the group consisting of ##STR16## terminated by an unreactive endcap.
Claim 16
Dependent Claim
21 words
A copolyimide according to claim 13 in which the molar ratio of AR 1 to AR 2 is 2:1 to 1:2.
Claim 17
Dependent Claim
21 words
A copolyimide according to claim 13 in which the molar ratio of AR 1 to AR 2 is 1.5:1 to 1:1.5.
Claim 18
Dependent Claim
19 words
A copolyimide according to claim 13 in which the molar ratio of AR 1 to AR 2 is 1:1.
Claim 19
Dependent Claim
15 words
An article comprising an electrically conductive material coated with a copolyimide according to claim 13.
Claim 20
Dependent Claim
15 words
An article comprising an electrically conductive material coated with a copolyimide according to claim 14.
Claim 21
Dependent Claim
15 words
An article comprising an electrically conductive material coated with a copolyimide according to claim 15.
Claim 22
Dependent Claim
15 words
An article comprising an electrically conductive material coated with a copolyimide according to claim 16.
Claim 23
Dependent Claim
44 words
An article in the form of a tape comprising an electrically conductive layer which may be fashioned into electrically conductive leads suitable for attachment to a semiconductor device, a layer of a copolyimide according to claim 13, and optionally bonding materials between said layers.
Claim 24
Dependent Claim
44 words
An article in the form of a tape comprising an electrically conductive layer which may be fashioned into electrically conductive leads suitable for attachment to a semiconductor device, a layer of a copolyimide according to claim 14, and optional bonding materials between said layers.
Claim 25
Dependent Claim
44 words
An article in the form of a tape comprising an electrically conductive layer which may be fashioned into electrically conductive leads suitable for attachment to a semiconductor device, a layer of a copolyimide according to claim 15, and optional bonding materials between said layers.
Claim 26
Dependent Claim
44 words
An article in the form of a tape comprising an electrically conductive layer which may be fashioned into electrically conductive leads suitable for attachment to a semiconductor device, a layers of the copolyimide according to claim 16, and optional bonding materials between said layers.
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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) | 1995-12-15 | 1996-06-15 | 1996-12-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-12-15 | 2000-06-15 | 2000-12-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-12-15 | 2004-06-15 | 2004-12-15 | $7700.00 | Window Closed / Lapsed |