Reduction of imprint in ferroelectric devices using a depoling technique
US6392919B1 · kind B1 · utility
3Cited by
2References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 14, 2001 |
| Grant date | May 21, 2002 |
| Priority date | — |
| Expiry date | May 14, 2021 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10D1/682
Abstract
A method for reducing imprint in a ferroelectric device which includes the steps of: applying a signal having a bipolar pulse shape for a predetermined time to the ferroelectric device; and decreasing the signal amplitude gradually in predetermined intervals of time and amplitude. Preferably, the bipolar shape signal is a sinusoidal wave, a square wave, or a sawtooth wave and the ferroelectric device is a capacitor of a memory cell in a computer. Also provided is an apparatus for reducing imprint in a ferroelectric device.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.