US 5,327,371 A · Information recording and reproducing apparatus

Abstract

An information recording and reproducing apparatus which has a memory portion which uses the Bloch lines occurring at the magnetic domain walls at the periphery of magnetic domains present in magnetic garnet films as the information carrier, a drive portion to write information into or read information from the said memory portion, and in which the memory portion is constructed to be connectable to and disconnectable from the drive means, wherein the signal transfer is carried out via a connection means when the said memory portion is set in the drive portion. In this information recording and reproducing apparatus, since the recording portion can be freely connected to or disconnected from the drive portion, it is possible to selectively insert portable substrates storing different information in the same apparatus body portion.

Claims24

Dependent claims

An information recording and reproducing apparatus comprising:

i) a card-like memory module including a memory element which is formed on a circuit substrate and which comprises:
a) a magnetic garnet film having an easy magnetization axis almost perpendicular to the main surface of said magnetic garnet film,
b) a plurality of first patterns which are arranged on said magnetic garnet film and each of which serves as a core to maintain a magnetic domain, said magnetic domain having a magnetic domain wall in which Bloch lines occur as information carriers, and
c) a plurality of second patterns which are arranged on said magnetic garnet film so as to sandwich every said magnetic domain maintained by said first patterns between said second patterns, which are longer in length than said first patterns, and each width of which is made larger at the end portion of said second pattern than at another portion thereof, and
ii) drive means for reading and writing information by driving said memory element in said memory module magnetically, wherein said memory module and said drive means can be attached to and detached from each other.

2 more elements

Dependencies are inferred from the claim text.

Information recording and reproducing apparatus

Life of this patent

Information recording and reproducing apparatus

Life of this patent

Abstract

Claims24