Low cost automated system for evaluating the electrical characteristics of ferroelectric materials
US5487014A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 26, 1994 |
| Grant date | Jan 23, 1996 |
| Priority date | — |
| Expiry date | Aug 26, 2014 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R27/2623
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A system that provides an automated simultaneous measurement of the electal characteristics of a ferromagnetic material as a function of temperature and electric potential. The system utilizes a personal computer that interfaces with a DUT fixture through an interface measuring circuit that provides a means for remote control of the measurement process and insures a more timely and less manually intensive measuring process. The interface measuring circuit is composed of a temperature measuring circuit for measuring the temperature applied to the DUT, a capacitor measuring circuit for measuring the electric potential applied to the DUT, a high voltage power supply, a temperature plate power supply, a high voltage power supply driver, a digital voltage meter (DVM), and a DVM multiplexer. The system can utilize a humidity-free "dry" chamber (i.e. a desiccation chamber) to insure that the measurements of the DUT are reliable and accurate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.