Anisotropically pressure-sensitive electroconductive composite sheets and method for the preparation thereof
US4252391A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 19, 1979 |
| Grant date | Feb 24, 1981 |
| Priority date | — |
| Expiry date | Jun 19, 1999 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/24174
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
Anisotropically pressure-sensitive electroconductive composite sheets are provided which have a very low electric conductive resistance in the direction perpendicular to the plane of the sheet when compressed with an adequate pressure in the direction but a high insulating resistance in all directions within the plane of the sheet. The composite sheets are constructed so that electrically conductive fibers are uniformly dispersed in the matrix of an electrically insulating substance, the average length of the fibers ranging from 20 to 80% of the thickness of the sheet, and are aligned in the direction substantially perpendicular to the plane. They are useful as a switching material in various miniaturized electronic circuits.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.