Abstract: A magnetic bubble memory device having a bubble generator which generates a magnetic bubble by conducting a pulse current on its hairpin-shaped conductor loop and a major propagation circuit for propagating the magnetic bubble to a transfer-in gate circuit which transfers the magnetic bubble to a memory storage region, wherein the device further comprises a gate means provided between the bubble generator and the major propagation circuit for transferring a magnetic bubble carrying information "1" onto the major propagation circuit at a first predetermined timing and preventing a spurious bubble to be transferred to the major propagation circuit at a second predetermined timing.

Abstract: A magnetic bubble memory element has a conductor pattern layer including a hair pin shaped conductor loop for generating or dividing magnetic bubbles. A heat sink pattern layer is provided close to the hair pin portion of the conductor loop and may be formed integrally with the loop.

Abstract: In a magnetic bubble memory device, positive signal lines interconnecting a magnetic bubble memory chip located at substantially the center of an insulating substrate and lead pins at the end of the substrate are surrounded by a plurality of grounded conductors for shielding the positive signal lines so as to decrease noise induced therein by a voltage drop across coils for producing the rotating magnetic field.