Craig and Antonelli
Magnetic bubble memory device and method of fabricating the same
 A magnetic bubble memory device and a method of fabricating the device are disclosed in which a conductor pattern lies at least between a film for maintaining magnetic bubbles therein, and a soft magnetic material pattern. Further, the magnetic bubble memory device can be formed precisely without suffering from errors due to mask alignment, by employing a mask provided with a plurality of patterns which are different in transmittance. 
Hitachi, Ltd.
H G H
H01F G11C H01F
inventional inventional inventional
Hirozi Hiroshi Yutaka Hideki Norikazu
Yamada Umezaki Sugita Nishida Tsumita