Reduction of imprint in ferroelectric devices using a depoling technique
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United States of America Patent
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Sep 25, 2001
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N/A
app pub date -
Aug 23, 2000
filing date -
Aug 23, 2000
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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 or a memory cell in a computer. Also provided is an apparatus for reducing imprint in a ferroelectric device.
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