JPS60179989A - Magnetic bubble transfer line - Google Patents

Abstract

PURPOSE:To increase the bias field margin by forming a notched part at the handle part of a rod-shaped or ladle-shaped pattern in the direction opposite to the magnetic bubble transfer direction in order to reduce the pattern width. CONSTITUTION:A ladle-shaped transfer pattern 13' is formed at the side of the bubble transfer direction P of a magnetic bubble transfer pattern 11. Then a notched part 13a of a square form is formed at the handle part of the pattern 13' in the direction opposite to the direction P in order to reduce the width of the pattern 13'. Then plural basic transfer patterns containing both patterns 13' and 11 are arrayed with prescribed spaces to form a bubble transfer line 10. As a result, the lower limit value of a bias field is increased by about 50e.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a magnetic bubble transfer path, and particularly to the pattern shape of a magnetic bubble transfer pattern.

[Background of the invention]

FIG. 1 is a plan view of a main part showing an example of a magnetic bubble memory element, which is generally called a field access method and transfers magnetic bubbles using a rotating magnetic field generated by an external coil. 9t
It is a complete drawing. In the same figure.

1 is a generator that generates magnetic bubbles that serve as information carriers.

2.3 is a major line that is a magnetic bubble transfer path that transfers magnetic bubbles that are normally input/output information, 4 is a minor loop that stores magnetic bubbles that have transferred major line 2 and stores information, and 5 and 6 are major 2 A gate section 7 transfers the magnetic bubble from the in 2 to the minor loop 4 or from the minor loop 4 to the major line 3, and 7 is a detector for detecting the presence or absence of a magnetic bubble.

In the magnetic bubble memory element formed at t14 in this way, since the gate parts 5 and 6 generally operate by passing a predetermined gate current, the distance between each gate is set to a certain distance. The following may cause malfunction. For this reason.

The length of the pattern period λ of the transfer pattern of the major line 2.3 that connects each gate is similarly limited. Foldable minor loop 4
When used in combination with ', the pattern period can reach λ≧20 μm.

When such a transfer pattern with a large pattern period λ is used, in order to prevent the transfer characteristics from deteriorating, the magnetic bubbles constituting the magnetic bubble transfer path 10 are A rod-shaped transfer pattern 12 or a ladle-shaped transfer pattern 13 is added to the magnetic bubble transfer direction P side of the transfer pattern 11, and the transfer pattern 11.
12 2 pits or C transfer pattern 11.13 2
The basic transfer pattern may be one unit of bit.

In addition, the transfer pattern of the major line of a magnetic bubble memory device having a gate section known as a swamp gate is similarly shown in FIG. 3(b) in order to exchange the magnetic bubble of the minor loop with the magnetic bubble on the major line. A ladle-shaped transfer pattern 13 is added to the transfer pattern 11 as shown in
A basic transfer pattern of one unit is used, which has the following functions at the same time.

However, the magnetic bubble transfer path 10 is constructed by arranging a plurality of basic transfer patterns having both the transfer pattern 11 and the rod-shaped transfer pattern 12 or the ladle-shaped transfer pattern 13 at the same time.

As shown in Fig. 4(a), (b), and (e), the phase of the in-plane rotating magnetic field Ha is in the directions a, b, and
0 of the ladle-like transfer pattern 13 as it progresses in the order of c.
5(b) and 5(e), the relationship between the ladle-shaped pattern 13 and the adjacent transfer pattern 11 should be avoided. There was a problem in that the magnetic bubble B was extended between the two, and as a result, the lower limit side of the bias magnetic field margin was significantly lowered, as shown by the characteristic (■) in FIG.

[Purpose of the invention]

Therefore, [the present invention has been made in view of the above-mentioned conventional problems Lj), and its purpose is to improve the bias magnetic field margin in a magnetic bubble transfer path consisting of a basic transfer pattern that also has a bar-like or ladle-like pattern. The object of the present invention is to provide a magnetic bubble transfer path that makes it possible to

[Summary of the invention]

In order to achieve such an object, the present invention provides a notch in the handle portion of the rod-shaped or ladle-shaped pattern to narrow the pattern width in the direction opposite to the direction of magnetic bubble transfer.

[Embodiments of the invention]

Next, embodiments of the present invention will be described in detail using the drawings.

FIG. 7 is an enlarged plan view of a main part of a magnetic bubble transfer pattern showing an example of a magnetic bubble transfer path according to the present invention.

In the figure, the ladle-shaped transfer pattern 13' disposed on the magnetic bubble transfer direction P side of the magnetic bubble transfer pattern 11 has a handle portion on the side opposite to the magnetic bubble transfer direction P.
An angular notch 13a is formed to narrow the pattern width. The magnetic bubble transfer path 10 is constructed by arranging a plurality of basic transfer patterns each consisting of the ladle-shaped transfer pattern 13' having such a notch 13a and the magnetic bubble transfer pattern 11 at a predetermined interval. Ru.

The magnetic bubble transfer pattern constituting such a magnetic bubble transfer path is as shown in FIGS. 8(a) and 8(b) + ((()).
.

When proceeding in the order of C, as shown in the same figure (b), the rotating magnetic field H
0 of the ladle-shaped transfer pattern 13' in the phase direction of 1l.
Since a repelling magnetic pole θ is generated at the position, the magnetic bubble B is transferred without extending even in the next phase direction C shown in FIG. 9(C), as shown in FIG. 9(c)K. In addition,
■ is an attractive magnetic pole. Further, when the magnetic bubble transfer path 10 configured as described above is actually applied to a magnetic bubble memory element having a diameter of about 2 μm.

As shown by the characteristic it in FIG. 6, the lower limit value of the bias magnetic field Is could be improved by about 50e compared to the characteristic I of the conventional magnetic bubble transfer path without a notch.

〔Effect of the invention〕

As explained above, according to the present invention, the lower limit value of the bias magnetic field can be improved, so that an extremely excellent effect can be obtained in that the bias magnetic field margin of the magnetic bubble transfer path can be improved.

[Brief explanation of the drawing]

Fig. 1 is a plan view showing an example of the main part of a magnetic bubble memory element, Fig. 2 is a diagram showing an example of a foldable minor loop, and Figs. FIGS. 4(1) and 4(b) are plan views showing an example of a basic transfer pattern having a ladle-like pattern. (C) is a plan view showing the formation sites of the attracting magnetic pole and the repelling magnetic pole O in the rotating magnetic field phase directions a, b, and c of the conventional magnetic bubble transfer pattern, FIGS. (C) is a plan view showing the transfer state of magnetic bubbles in the rotating magnetic field phase directions (a), (b), and (C) of a conventional magnetic bubble transfer pattern, and FIG. 6 is a magnetic bubble transfer path according to the conventional and present invention. FIG. 7 is an enlarged plan view of the main part of a magnetic bubble transfer pattern showing an example of the magnetic bubble transfer path according to the present invention, and FIG. 8(a), ( b) l (e
) is a plan view showing the formation locations of the attractive magnetic pole (■) and the repelling magnetic pole (O) in the rotating magnetic field phase directions a, b, and c of the magnetic bubble transfer pattern constituting the magnetic bubble transfer path according to the present invention;
FIG. 9 is a plan view showing the transfer state of magnetic bubbles in the rotating magnetic field phase directions a, b, and c of the magnetic bubble transfer pattern of the magnetic bubble transfer path according to the present invention. 10...Magnetic bubble transfer path, 11...Magnetic bubble transfer pattern, 12...Bar-shaped transfer pattern, 13
′...Ladle-shaped transfer pattern %13a...notch, P...magnetic bubble transfer direction, HR...rotating magnetic field, B...magnetic bubble. Agent Patent Attorney Akio Takahashi (a) (b) (C) p, P P

Claims (1)

[Claims] A plurality of basic transfer patterns of 2-pit units each having a different shape in the magnetic bubble transfer direction are arranged in nine repeats on each edge, and one side in the magnetic bubble transfer direction that becomes the repeating basic transfer pattern is a rod-shaped or ladle-shaped pattern, A magnetic bubble transfer path characterized in that a handle portion of the pattern has a cutout portion of the pattern on the side opposite to the magnetic bubble transfer direction.