JPS60111386A - Magnetic bubble memory element - Google Patents

Abstract

PURPOSE:To obtain a magnetic bubble memory element having a magnetic bubble basic transfer path which stably operates after increasing a density by dirrering the height of an inlet side leg of a basic pattern, which forms a magnetic bubble transfer path, from that of an outlet side leg. CONSTITUTION:Height L1 of an inlet side leg of a basic pattern 1 is differed from a height L2 of an outlet side leg. Figures show the case in which an asymmetric chevron is used, the Figures (a) denote the case in which the height L1 of the inlet side leg is longer than the height L2 of the outlet side leg, and Figures (b) show the reverse case in which the L1 is smaller than the L2. Thus stable transfer characteristics can be obtained. Only the case in which the asymmetric chevron pattern is used for the basic pattern 1 is shown, but the above can be applied to the cases in which a half disk pattern, a C pattern, an asymmetric C pattern, etc. are used.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a magnetic bubble memory device, and particularly relates to an improvement of a basic transfer device constituting a magnetic bubble transfer path suitable for a high-density magnetic bubble memory device. Usually used. This is a method that transfers bubbles by forming a permalloy thin film baton and magnetizing it with an external rotating magnetic field that rotates within the plane.

The basic transfer element for magnetic puzzle transfer using the permalloy drive method conventionally used in magnetic bubble memory elements is several M
In a magnetic bubble memory element with a high density as shown in FIG. An example of a conventional magnetic bubble basic transfer path is shown. Each of the batons (&) to (d) is an asymmetrical chevron baton and a half disc baton, respectively.

C' pattern/, known as asymmetrical C pattern. The basic transfer paths (a) to (d) are formed by arranging these basic patterns 1. By applying a rotating magnetic field HR rotating counterclockwise from the outside, the magnetic bubbles are transferred in the direction of arrow P.

Now, in such a conventional magnetic bubble basic transfer path, when the negative period is made small in order to increase the density, there is a problem that magnetic bubbles cannot be transferred stably enough. This is because the magnetic bubble becomes unstable when transferring across the gap g.

Therefore, by improving the transfer characteristics of the gap g, a transfer path that operates stably can be obtained. For this purpose, each glazed barbane was placed on its side.

As a result, it became clear that the balance between the height and length (L11L2) of the left and right foot portions of the basic baton 1 was greatly effective.

In the conventional basic baton 1, as illustrated in FIG. 1, the height Ll measured at the entrance and the height L2 measured at the exit were the same value.

In the present invention, i, 1 and L2 are formed differently.

FIG. 2 shows an embodiment of the magnetic bubble basic transfer path of the magnetic bubble memory device according to the present invention. The figure shows an example in which an asymmetrical chevron batten is used in the basic pattern /2. The example in figure (a) is an example in which the height Ll of the entrance measurement is higher than the height L2 in the exit measurement, and the figure (b) is an example in which Ll is conversely lower than L2. .

Experiments have shown that by doing this, stable transfer performance can be obtained.

In addition, although the example shows the case where an asymmetrical Sipron pattern is used as the basic baton, this book also applies to cases where basic batons such as the no-f disk batan, C pattern, and asymmetrical C-pattern are used. The invention is equally applicable.
- [Effects of the Invention] As described above, according to the present invention, by making the heights of Ll and L2 different, it is possible to provide a magnetic bubble memory element having stable transfer characteristics.

[Brief explanation of drawings]

Figure 1 is a diagram of the conventional magnetic bubble basic transfer path.
FIG. 2 is a cross-section diagram of one embodiment of the present invention. 1.2--Basic slam, LI@...Height of entrance measurement, L2...Fist - height of exit measurement. Agent: Patent attorney Akimi Takahashi. 1 ＼ゝ. Figure 1 Figure 2

Claims (1)

[Claims] A magnetic bubble memory element in which the entrance measurement height of the basic slam that forms the magnetic bubble transfer path and the height of the exit foot are different.