Optimized capacitive sensor for chemical analysis and measurement
US4822566A · kind A · utility
368Cited by
6References
16Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 18, 1987 |
| Grant date | Apr 18, 1989 |
| Priority date | — |
| Expiry date | May 18, 2007 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S436/806
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An apparatus for detecting the presence and/or measuring the concentration of an analyte in the fluid medium is disclosed. The apparatus relies on biospecific binding between a biochemical binding system and the analyte to change the dielectric properties of a capacitive affinity sensor. The biological affinity sensor is optimized by: (1) adjusting the thickness and dielectric properties of a passivation layer to generally match the impedance of the biological binding system; and (2) minimize the double layer capacitance so that bulk capacitance changes associated with the biological binding system are maximized.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.