| 发明名称 |
High-density magnetic bubble memory device |
| 摘要 |
A high-density magnetic bubble memory device using magnetic bubbles having a diameter not larger than 2 mu m comprises a magnetic layer capable of sustaining the bubbles therein, and a propagation pattern formed in or on a surface of the magnetic layer. In the device, a relation H/d</=0.8 is satisfied wherein H is the thickness of the magnetic layer and d the diameter of the bubble. When the propagation pattern is made of a permalloy, h/d (h: bubble height in that case) is not larger than 0.8. When the propagation pattern is formed through ion implantation, h'/d (h': bubble height in that case) is not larger than 0.6.
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| 申请公布号 |
US4617644(A) |
申请公布日期 |
1986.10.14 |
| 申请号 |
US19840590869 |
申请日期 |
1984.03.19 |
| 申请人 |
HITACHI, LTD. |
发明人 |
HIROSHIMA, MINORU;MATSUMOTO, SHINZO;SEKINO, MITSURU;TANIGUCHI, YOSHINORI |
| 分类号 |
G11C11/14;G11C19/08;(IPC1-7):G11C19/08 |
主分类号 |
G11C11/14 |
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