Thin oriented polymer films containing metal-organic compounds
US4963429A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 29, 1988 |
| Grant date | Oct 16, 1990 |
| Priority date | — |
| Expiry date | Dec 29, 2008 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31678
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Very thin polymer/MOC film, on the order of 500A to 1000A thick, is prepared by dissolving both the polymer and the MOC sequentially in the same solvent to obtain an emulsion consisting of a discontinuous phase of finite globules of the MOC solution dispersed in a continuous phase of the polymer solution, then partially evaporating the solvent from a layer of the emulsion, and finally subjecting the resultant polymer/MOC layer, while the solvent continues to evaporate, to a controlled treatment permitting attainment of a desired arrangement of the MOC phase in and throughout the film, depending on the specific film properties sought to be achieved, while the polymer crystallizes. The treatment may be a drawing operation or, if the metal component of the MOC is magnetic, the application of a magnetic field either parallel or perpendicular to the plane of the layer. Such films are useful as dielectrics for capacitors and may further be useful as shielding materials for integrated circuits to protect the same against electromagnetic interference, as data storage devices, and as electromagnetic wavelength selectors. Film of greater thickness can be formed by winding or folding the star…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.