Ion sensors and their divided parts
US4921591A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 13, 1988 |
| Grant date | May 1, 1990 |
| Priority date | — |
| Expiry date | Oct 13, 2008 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N27/414
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An ion sensor includes an ion sensitive membrane formed from a vinyl polymer based compound containing a hydroxyl and/or carboxyl group. The membrane is provided on an extended gate electrode on a gate electrode of a field-effect type transistor. The ion sensor also includes a reference electrode arranged in opposition to the extended gate electrode. The extended gate electrode and reference electrode are formed on a substrate different from the substrate on which the field-effect type transistor is formed. A divided part for an ion sensor is also provided and includes the portions of the ion sensor discussed above except for the reference electrode. The divided part is used with a separate reference electrode.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.