Planar interdigitated dielectric sensor
US5095278A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 29, 1989 |
| Grant date | Mar 10, 1992 |
| Priority date | — |
| Expiry date | Jun 29, 2009 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R27/2635
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A planar interdigitated dielectric sensor useful for measuring the surface properties of a material is disclosed. The sensor is formed on an insulating substrate. Attached to the surface of the substrate is an excitation electrode and a response electrode disposed in an interdigitated pectinate configuration and a resistance temperature device a (metallic strip). Filling the space between the electrodes and the metallic strip is an insulating material of known dielectric properties. The upper surface of the electrodes and the metallic strip are generally coplanar with respect to the insulating material between the electrodes thus forming a flat upper surface on the sensor. This flat upper surface serves to eliminate air gaps between the sensor surface and sample when analyzing relatively viscous materials.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.