G - Physics – 11 – C
Patent
G - Physics
11
C
352/37.3
G11C 11/14 (2006.01) G11C 13/06 (2006.01) G11C 19/08 (2006.01) H03K 3/45 (2006.01)
Patent
CA 1083712
ABSTRACT Digital information storage device comprising a control de- vice connected to an information input, a non-magnetic substrate layer and two integral layers of magnetic material in which mag- netic domains can be substained by a main magnetic field generator. Each of the layers comprise at least two magnetic crystalline sub- lattices with first and second magnetisations which are each time complementary within a layer and which have substantially opposed directions. A first and second means are provided for successively generating a series of magnetic domains in the first and second layers respectively and can form superposed magnetic domains pairs in the first and second layers and non-superposed magnetic domains which exhibits mutually repellant forces. A drive means is pro- vided for driving a relative displacement between the first and second means and their generated series of magnetic domains. There is also provided a detector unit and a destruction unit for the magnetic domains. The first and second means are connected together for coincident driving of single magnetic domains or domain pairs, present in a row of the first shift register in a direction trans- verse to and out of the register, a control member being provided or activating the third means at instants whose intervals correspond to integer numbers of half periods of the drive in the first shift register for successive formation of rows of single magnetic do- mains or domain pairs in a direction along the first shift reg- ister in a two-dimensional domain array region which is situated adjacently thereto.
258885
Haisma Jan
Van Mierloo Klaas L. L.
N.v. Philips Gloeilampenfabrieken
Van Steinburg C.e.
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