US5024873A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Composite films with Langmuir-Blodgett component
Assignee: Nokia Bell Labs
•
Filing: 1988-12-05
•
Granted: 1991-06-18
•
Expires: 2008-12-05
Abstract
Abstract A Langmuir-Blodgett monolayer polyimide film and a bulk amorphous polyimide film are in contacting superposed relation to form a composite film having improved moisture resistance. The composite film may be either a free film or provide an insulating coating on the surface of a microelectronics device.
Inventors
- 👤 John J. Burack
- 👤 Jane D. LeGrange
- 👤 Wesley P. Townsend
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:47
CPC Classifications
B; B05; B05D; B05D1/00; B05D1/18; B05D1/20; B05D1/202; B82; B82Y; B82Y30/00; B82Y40/00; H; H05; H05K; H05K3/00; H05K3/22; H05K3/28; H05K3/281; H05K2201/00; H05K2201/01; H05K2201/0137; H05K2201/0154; H05K2201/0183; H05K2201/0195; H05K2203/00; H05K2203/05; H05K2203/0562; H05K2203/0577; Y; Y10; Y10S; Y10S428/00; Y10S428/901; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31721
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
102 words
The combination comprising: a substrate body, a plurality of electroconductive elements disposed in spaced relation of the surface of said body, and a composite film adhering to said body and coating said electroconductive elements and surface areas therebetween of said body, said composite film comprising: a first film of dielectric material other than a Langmuir-Blodgett film and a second Langmuir-Blodgett film prepared from amphiphilic material and thinner than said first film, said two films being in superposed relation with each other, and said Langmuir-Blodgett film rendering said composite film more moisture resistant than either of said first and second films taken alone.
Claim 2
Dependent Claim
102 words
The combination comprising: a substrate body, a plurality of electroconductive elements disposed in spaced relation of the surface of said body, and a composite film adhering to said body and coating said electroconductive elements and surface areas therebetween of said body, said composite film comprising: a first film of dielectric material other than a Langmuir-Blodgett film and a second Langmuir-Blodgett film prepared from amphiphilic material and thinner than said first film, said two films being in superposed relation with each other, and said Langmuir-Blodgett film rendering said composite film more moisture resistant than either of said first and second films taken alone.
Claim 3
Dependent Claim
16 words
A combination according to claim 1 in which said first film is a spun cast film.
Claim 4
Dependent Claim
16 words
A combination according to claim 1 in which said first film is of amorphous internal structure.
Claim 5
Dependent Claim
26 words
A combination according to claim 1 in which said first film is of a thickness in the range between and including 2 microns and 10 microns.
Claim 6
Dependent Claim
15 words
A combination according to claim 1 in which said dielectric material is a polyimide compound.
Claim 7
Dependent Claim
16 words
A combination according to claim 1 in which said Langmuir-Blodgett film consists of a Langmuir-Blodgett monolayer.
Claim 8
Dependent Claim
17 words
A combination according to claim 1 in which said Langmuir-Blodgett film is constituted of a polyimide compound.
Claim 9
Dependent Claim
100 words
The combination comprising: a substrate body, a plurality of electroconductive elements disposed in spaced relation on a surface of said body, and a composite film adhering to said body and coating said elements and surface areas therebetween of said body, said composite film comprising a first spun cast amorphous film of polyimide material and a second Langmuir-Blodgett film of polyimide material and thinner than said first film, said first and second films being in superposed relation with each other, and said Langmuir-Blodgett film rendering said composite film more moisture resistant than either of said first and second films taken alone.
Claim 10
Dependent Claim
100 words
The combination comprising: a substrate body, a plurality of electroconductive elements disposed in spaced relation on a surface of said body, and a composite film adhering to said body and coating said elements and surface areas therebetween of said body, said composite film comprising a first spun cast amorphous film of polyimide material and a second Langmuir-Blodgett film of polyimide material and thinner than said first film, said first and second films being in superposed relation with each other, and said Langmuir-Blodgett film rendering said composite film more moisture resistant than either of said first and second films taken alone.
References Cited (Backward Citations)
US4696838A
Cited
US4822853A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-06-17 | 1994-12-17 | 1995-06-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-06-17 | 1998-12-17 | 1999-06-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-06-17 | 2002-12-17 | 2003-06-18 | $7700.00 | Window Closed / Lapsed |