Some content of this application is unavailable at the moment.
If this situation persists, please contact us atFeedback&Contact
1. (WO1979000097) PHOTOVOLTAIC-FERROELECTRIC DATA RECORDER
Latest bibliographic data on file with the International Bureau

Pub. No.: WO/1979/000097 International Application No.: PCT/US1978/000062
Publication Date: 08.03.1979 International Filing Date: 07.08.1978
IPC:
G11B 11/08 (2006.01) ,G11B 9/02 (2006.01) ,G11C 14/00 (2006.01)
G PHYSICS
11
INFORMATION STORAGE
B
INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
11
Recording on, or reproducing from, the same record carrier wherein for these two operations the methods or means are covered by different main groups of groups G11B3/-G11B7/212; Record carriers therefor
08
using recording by electric charge or by variation of electric resistance or capacitance
G PHYSICS
11
INFORMATION STORAGE
B
INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
9
Recording or reproducing using a method or means not covered by one of the main groups G11B3/-G11B7/139; Record carriers therefor
02
using ferroelectric record carriers; Record carriers therefor
G PHYSICS
11
INFORMATION STORAGE
C
STATIC STORES
14
Digital stores characterised by arrangements of cells having volatile and non-volatile storage properties for back-up when the power is down
Applicants:
Inventors:
Priority Data:
82489415.08.1977US
Title (EN) PHOTOVOLTAIC-FERROELECTRIC DATA RECORDER
(FR) ENREGISTREUR DE DONNEES PHOTOVOLTA(ALPHA)B5QUE-FERROELECTRIQUE
Abstract:
(EN) A data recording and read-out apparatus and method in which a ferroelectric ceramic substrate (5) is remanently polarized to store information. Upon being illuminated, the substrate produces a photovoltaic voltage, which is detected to effect read-out. A disk (1) of ferroelectric ceramic material (5) to which information is entered by spiral tracking, either in a single track or in multiple tracks. A self-scanning data record comprised of a plurality of ferroelectric ceramic cells (20) which are remanently polarized, and which are read out by a register (22).
(FR) Methode et appareil d"enregistrement et de lecture de donnees dans lequel un substrat en materiau ceramique ferro-electrique est polarise par remanence pour la memorisation de l"information. Par eclairage, le substrat produit une tension photovoltaique qui est detectee pour effectuer la sortie. L"information est introduite dans un disque (1) en materiau ceramique ferro-electrique (5) par affichage immediat spiral, soit sur une piste, soit sur des pistes multiples. Un enregistrement de donnees auto-analysable comprend une pluralite de cellules (20) en materiau ceramique ferro-electrique qui sont polarisees par remanence et dechiffrees par un registre (22).
Designated States:
Publication Language: English (EN)
Filing Language: English (EN)