Method of writing and erasing information for electrooptic ceram

Details Method of writing and erasing information for electrooptic ceram Method of writing and erasing information for electrooptic ceram

1974-04-08

1976-08-03

Hecker, Stuart N.

Communications: electrical

Digital comparator systems

340173LM, 350150, G11C 1122, G11C 1142

Patent

active

039732479

ABSTRACT:
An information is written or erased in such way that, while a memory employing electrooptic ceramics wherein a ferroelectric phase and an anti-ferroelectric phase (or paraelectric phase) coexist having a morphotropic phase boundary is being heated to a temperature at which the polymorphic base boundary of the ceramic material occurs, an electric field opposite in polarity to the spontaneous polarization of the memory is applied to the material.
According to the writing or erasing method, the writing of the information into the memory employing the material or the erasure of the information can be perfectly performed.

REFERENCES:
patent: 3710352 (1973-01-01), Smith et al.
patent: 3871745 (1975-03-01), Waku et al.
Ferro-electric Ceramic Stores High Resolution Images Optics and Laser Technology, 4/72, vol. 4, No. 2, pp. 91-92, S2702 0040.

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