公开(公告)号：DE2310191A1

公开(公告)日：1974-01-24

申请号：DE2310191

申请日：1973-03-01

Applicant: IBM

Inventor： HENDEL ROBERT JAMES ,  JAMBA JUN THEODORE FRANK ,  KEEFE GEORGE EDWARD ,  ROSIER LAURENCE LEE

IPC: G11C11/14 ,  G11C19/08

Abstract: A structure for increasing the reliability of a magnetic bubble domain memory system in which the operating margins of various components within the system are enlarged so that the margins of the components will have a larger area of overlap. For components in which a lessening of the effect of the bias field Hz is desirable (splitters, generators, corner propagation elements, etc.), a thin layer of magnetically soft material (for instance, permalloy) is provided which extends over the area of the magnetic sheet in which the component function takes place. This thin layer is in addition to the overlay elements used to provide the function. In a memory system, selectively placed "thin patches" of permalloy or strips of permalloy are used in the critical component areas to improve operating margins of these components.