US5077382A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Copolyimide odpa/bpda/4,4'-oda or p-pda
Assignee: Occidental Chemical Corp
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Filing: 1989-10-26
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Granted: 1991-12-31
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Expires: 2009-10-26
Abstract
Abstract A co-polyimide based upon a mixture of 4,4'-oxydiphthalic dianhydride (ODPA) and 3,4,3',4'-biphenyltetracarboxylic dianhydride (BPDA) as the dianhydride component and either 4,4'-oxydianiline (ODA) or paraphenylene diamine as the amine component is disclosed. The molar ratio between the ODPA and BPDA ranges from 3:1 to 1:3. The co-polyimide may either be formed as a random copolymer, or as a block copolymer where the blocks are based upon blocks of polymer containing ODPA and blocks of polymer containing BPDA provided that the molar ratios of ODPA and BPDA are in the ratio of 3:1 to 1:3.
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 22:53
CPC Classifications
H; H10; H10W; H10W70/00; H10W70/60; H10W70/67; H10W70/69; H10W70/695; C; C08; C08G; C08G73/00; C08G73/06; C08G73/10; C08G73/1042; C08G73/1067; C08G73/1071; H10W72/00; H10W72/30
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
64 words
A block copolyimide in which the following two recurring structures exist as blocks wherein block 1 is ##STR10## where AR 1 is ##STR11## wherein block 2 is ##STR12## where AR 2 is ##STR13## provided that the molar ratio of block 1 to block 2 is in the range of 3:1 to 1:3 and where AR 3 is selected from the group consisting of ##STR14##
Claim 2
Dependent Claim
64 words
A block copolyimide in which the following two recurring structures exist as blocks wherein block 1 is ##STR10## where AR 1 is ##STR11## wherein block 2 is ##STR12## where AR 2 is ##STR13## provided that the molar ratio of block 1 to block 2 is in the range of 3:1 to 1:3 and where AR 3 is selected from the group consisting of ##STR14##
Claim 3
Dependent Claim
25 words
A copolyimide according to claim 1 in which the molar ratio of block 1 to block 2 is in the range of 2:1 to 1:2.
Claim 4
Dependent Claim
25 words
A copolyimide according to claim 1 in which the molar ratio of block 1 to block 2 is in the range of 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 block 1 to block 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.
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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) | 1994-12-30 | 1995-07-01 | 1995-12-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-12-30 | 1999-07-01 | 1999-12-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-12-30 | 2003-07-01 | 2003-12-31 | $7700.00 | Window Closed / Lapsed |