Static information storage and retrieval – Radiant energy – Semiconductive
Patent
1993-11-24
1996-03-12
Yoo, Do Hyun
Static information storage and retrieval
Radiant energy
Semiconductive
365112, 365215, G11C 1304
Patent
active
054992060
ABSTRACT:
A semiconductor optical memory device includes a semiconductor layer formed with a plurality of elemental recording areas each having a size generally equal to a wavelength of the optical beam. A plurality of quantized regions are formed in each elemental recording area of the semiconductor layer. Each of the quantized regions has a quantized energy level and absorbing an optical radiation of which wavelength is pertinent to the quantized energy level of that quantized region by forming first type carriers having a first polarity and second type carriers having a second, opposing polarity. Each of the quantized regions includes a semiconductor material confined in at least two mutually perpendicular directions to form the quantized energy level and has the optical absorption wavelength that is different from that of other quantized regions included in each elemental recording area.
REFERENCES:
patent: 4101976 (1978-07-01), Castro et al.
patent: 4103312 (1978-07-01), Chang et al.
patent: 4855950 (1989-08-01), Takada
patent: 4864536 (1989-09-01), Lindmayer
patent: 4933926 (1990-06-01), Tabei et al.
Patent Abstracts of Japan, vol. 12, No. 453 (P-792), Nov. 29, 1988 & JP-A-63-177,131, Jul. 21, 1988.
Fujitsu Limited
Yoo Do Hyun
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