Static information storage and retrieval – Radiant energy – Amorphous
Patent
1987-04-17
1989-08-08
Hecker, Stuart N.
Static information storage and retrieval
Radiant energy
Amorphous
365215, 365127, G11C 1300, G11C 700
Patent
active
048559504
ABSTRACT:
An optical memory comprising a doping modulated multilayer made of amorphous semiconductor, and at least two electrodes, one of the electrodes being transparent and the multilayer being sandwiched between two electrodes. Data is written by increasing the electrical conductance of the amorphous semiconductor by irradiating it with light. Data is erased by the application of a bias voltage to the electrodes and also by irradiating the amorphous semiconductor with light having photon energy of approximately half or less of the optical energy band gap of the amorphous semiconductor. The memory effect can be maintained for a week or longer, and the memory can be erased without heating the memory device, whereby the lifetime of the device is lengthened.
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Garcia Alfonso
Hecker Stuart N.
Kanegafuchi Chemical Industry Company Limited
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