JPS5913105B2 - Beaded disk pattern magnetic bubble device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a cascading disk pattern magnetic bubble device;
In particular, in a cascading disk pattern magnetic bubble device that writes and reads information bubbles between 10 major loops and a plurality of minor loops of a cascading disk pattern transfer path having a super track and a bad track, The transfer disk pattern of the major loop corresponds to the transfer disk pattern of the minor loop, and the day 15 disk pattern is configured to have a predetermined gap to form a transfer path of the major loop. The present invention relates to a pattern transfer path of a medium loop in which information bubbles are written and read.

20-Generally, a magnetic thin film bubble crystal, for example, a garnet film, is covered with a resist, an Au vapor deposited film, etc.
It is known that when a disk-shaped pattern is created by implanting ions, bubbles are attracted to the periphery of the disk-shaped pattern.

Then, as shown in FIG. 251, when an in-plane rotating magnetic field (hereinafter simply referred to as a rotating magnetic field) is applied to the adjacent bead-shaped disk pattern 1 of the disk, the bubbles
Move along the periphery of pattern 1. Such a magnetic thin film has 30 axes that are susceptible to strife-out in 3 directions.
,■,■ exist at intervals of 1200, and these 12
In which direction are the disk patterns forming the bead-shaped disk pattern 1 arranged with respect to the easy magnetization axis having an interval of 0.00, for example, a super track S, a pad track b, Good truck y
Three bubble movement paths are created. Here, the super track S is a transfer path where the K1 direction of the magnetic thin film bubble crystal and the traveling direction of the transfer path have the relationship shown in Figure 1, and it is generally said that the bias margin of the transfer path is large. This is the path through which bubbles can be easily transferred.

Bud track b is a transfer path where the bias margin is said to be the smallest based on the relationship shown in FIG. 1, and it is a path in which bubbles are difficult to be transferred. Good track 9 is a path with intermediate operating margin for bubble transfer.
As shown in FIG. 1, the passage on the opposite side to the super truck S becomes a good truck b. Furthermore, all the paths of the bead-shaped disk pattern 1 in the direction K of the magnetic thin film bubble crystal become good tracks 9. This is because the peculiarity of bubble transfer appears due to the magnetocrystalline anisotropy of the magnetic thin film bubble crystal. FIG. 2 is a principle diagram explaining the basic operating principle of a chain-shaped disk pattern transfer path having a super track S and a butt track B, in which 2-1 to 2-8 are disk patterns, 3
is a transfer path pattern, and the transfer path pattern 3 is an adjacent disk pattern of four disk patterns 2-1 to 2-4 and an adjacent disk pattern of four disk patterns 2-5 to 2-8. It is assumed that the disks form a bead-shaped disk pattern arranged in rows with a gap in between.

And these disk patterns 2-1 to 2-8
The relationship between the magnetic thin film and the bubble path under the disk patterns 2-1 to 2-8 is super track S.
In addition, the passage of the upper bubble is constructed as a pad track b. 4 is a bubble, which is the super track S of transfer path pattern 3 before applying the rotating magnetic field.
exists at 4'0 as the rotating magnetic field is applied.
), the bubble 5 is a bubble that exists in the pad trattor b of the transfer path pattern 3 before the rotating magnetic field is applied, but as the rotating magnetic field is applied, the bubble 5
' represents a bubble transferred to the super trading S.

Note that K1 in the figure represents the direction of the easy axis of magnetization with respect to the disk pattern of a magnetic thin film bubble crystal, such as a garnet film. As shown in FIG. 2, when a bubble 4 exists in the path below the disk pattern 2-1 of the transfer path pattern 3, that is, in the super track S, when a rotating magnetic field is applied in the counterclockwise direction, the bubble 4 is the adjacent disk pattern 2-2, 2- by 1 bit every l rotation of the rotating magnetic field
3, and by repeating this, bubble 4 is transferred.
is transferred up to disk pattern 2-3.

The bubble 4 transferred to the disk pattern 23 moves along the periphery of the disk pattern 2-4 together with the rotating magnetic field of the next cycle, but the bubble 4 rotates once and leaves the disk.
It does not rotate back to the upper path of the pattern 2-4, ie, the butt track b, but is transferred across the gap to the next disk pattern 2-5 by the application of the next rotating magnetic field.
In this way, even if there is a gap between the disk patterns, if the width of the gap is within a predetermined gap, the bubble on the super track S will be transferred across the gap onto the super track S. I have a tendency to go. Then, as the rotating magnetic field is applied, the bubble 4 moves and the bubble 4
will be transferred to. On the other hand, disk pattern 2-6
When a rotating magnetic field is applied in the counterclockwise direction, the bubble 5 existing in the upper path, i.e., the Bud track b,
is transferred to adjacent disk pattern 2-5.

When the next cycle of rotating magnetic field is applied, the bubble 5 is unable to cross the gap and rotates along the periphery of the disk pattern 2-5 as shown by the broken line in FIG. will be introduced in Then, as the rotating magnetic field is applied, the bubble 5 is transferred on the super track S and moves to the bubble 5. In this way, when there is a predetermined gap between data patterns in the transfer path pattern 3, the bubble 4 on the super track S is transferred across the gap, whereas the bubble on the butt track b is transferred across the gap. 5 cannot cross the gap, but moves along the periphery of the disk pattern and is introduced into the super track S. A conventionally known magnetic bubble device with a bead-shaped disk pattern transfer path.
Transfer gates for writing from a loop to a minor loop or reading from a minor loop to a major loop can be roughly divided into the following two types. The first is that if the information bubble 7 is transferred from the left to the right as shown in the figure, the lower transfer path of the major loop transfer path 6, that is, the super track S in FIG. 7 comes to a predetermined position, the transfer path 6 of the major loop and the transfer pattern of the minor loop that stores information (
A pulse current is applied to the hairpin-shaped conductor pattern 9 that transfers between the bubbles 7 and 8.
is pulled through the hairpin conductor pattern 9 and transferred to the minor loop transfer pattern 8. That is, information is written to the minor loop. At this time, bubble 7 is the transfer path 6 of the mejia loop.
Since it extends across the loop pattern and is transferred to the minor loop transfer path 8, a large pulse current must be passed through the conductor loop of the hairpin conductor pattern 9, and the bias margin is small. . The second transfer gate has the configuration shown in FIG. 4, in which a striped conductor 12 is provided between the major loop transfer path 10 and the minor loop transfer pattern 11, and an information bubble 13 is formed. When it reaches a predetermined position, a pulse current is applied to the striped conductor 12, and the magnetic field gradient causes the bubble 13 to be moved from the upper path of the major loop transfer path 10, that is, the super track S, to the minor loop transfer pattern 11. Transfer and write.

At this time, the bubble 13 does not need to cross the butt track b of the transfer path 10 of the major loop, but when reading, the position of the bubble transferred from the transfer pattern 11 of the minor loop to the transfer path 14 of the major loop. is read out to the lower path of the transfer path 14 of the medium loop, ie, pad track b, via the conductor 15, which has the disadvantage that the time sequence of writing and reading is reversed. The present invention forms a major loop pattern transfer path with a predetermined gap between the minor loop transfer disk pattern lζ and the corresponding major loop disk pattern,
Therefore, by allowing the information bubble to move across the gap, the pulsed current applied to the conductor loop of the hairpin-like conductor pattern required for transfer is reduced, and the time sequence of writing and reading is the same, thereby eliminating the above-mentioned drawbacks. aimed at solving. Therefore, the magnetic bubble device with a continuous beaded disk pattern of the present invention has a transfer path of a continuous beaded disk pattern, and the transfer path includes a major line for transferring information bubbles, and a plurality of minor lines for storing the information bubbles. - A bead-shaped disk pattern magnetism having a loop, a write circuit for writing these information bubbles into the minor loop, and a read circuit for reading out the information bubbles written in the minor loop onto the major line. In the bubble device, the disk pattern of the major line is placed at a predetermined interval on the bubble transfer path of the major line corresponding to each loop constituting the minor loop, and the major line and the minor loop are connected to each other. The magnetic bubble is characterized in that at least one of writing and reading of the magnetic bubble is performed using the gap. This will be explained below with reference to the drawings. FIG. 5 is an explanatory diagram illustrating the major loop and minor loop bubble tracks, and FIG. 6 is an operational principle diagram illustrating the operation of the present invention. In FIG. 5, 16-1 and 16-2 represent major loops, 17-1 to 17-N represent minor loops, and conductor patterns 18 and 19, respectively.

The lower side of the medium loop 16-1 is formed as a super track S to which bubbles are easily transferred, and the upper side is formed as a butt track B. The lower side of the medium loop 16-2 is the super track S, and the upper side is the butt track B.
It is. and minor loop 17-1 to 17-N
There are good tracks 9 on both sides. A bubble train corresponding to the address information is generated from a bubble generator (not shown), and the bubble train is passed through the medium loop 16-1.
The magnetic field is transmitted on the super track S with the application of a counterclockwise rotating magnetic field.

And the bubble row is a mezzia loop 16-1 to 16
-N, when a pulse current is passed through the conductor loop of the conductor pattern 18, each bubble is introduced into the disc pattern of the minor loops 17-1 to 17-8. , the information bubble moves from the major loop 16-1 to the minor loop 17-
1 to 17-N. Also, reading is possible with My+.
When the information bubble reaches an appropriate position in the loops 17-1 to 17-N, when a pulse current is applied to the conductor loop of the conductor pattern 19, the minor loop 17-1
to 17-N bubbles have their corresponding medians.
The bubble train attracted by the disk pattern of the loop 16-2 is introduced into the super track S of the medium loop 16-2. These bubbles are then transferred along the super track S of the medial loop 16-2 together with the rotating magnetic field. FIG. 6 is an operational principle diagram for explaining the operation of the present invention, and is a partially enlarged view of FIG. 5 during writing.

Reference numerals 16-1, 17-1 to 17-3, 18 correspond to those in FIG. 20 is a bubble, 21 is a disk pattern, 22 and 23 are oval disk patterns which form a transfer path with a predetermined gap between them, and 24 is a transfer disk for the minor loop 17-2.・Represents a pattern.

Let us now consider the case where Pubble 20 is stored in the minor loop 17-2. Assume that when the rotating magnetic field H is directed in the direction C and 0R, the bubble 20 of interest is on the super track S below the disk pattern 21 of the medium loop 16-1 as shown in FIG. , as the rotating magnetic field H rotates 1R in the counterclockwise direction, the bubble 20 also changes to the disk.
When the bubble 20 moves along the periphery of the pattern 21 and the rotating magnetic field H points approximately in the direction of the SRD, the bubble 20 is transferred to the 20'0) position.

While the rotating magnetic field HR is further rotated and its direction is directed toward AeB, the bubble 20 does not move along the periphery of the disk pattern 21 as explained in FIG. 2 above, but remains at the position 20. It is stopped.

When the rotating magnetic field HR rotates and points from B to C, bubble 2
The 0 is transferred along the periphery of the oblong disk pattern 22 and comes to position 2r. Furthermore, as the rotating magnetic field HR starts one rotation and is directed in the direction D, the bubble 20 is transferred to the position "A" between the oval disk patterns 22 and 23.Oval disk patterns 22 and 23 A conductor loop of a hairpin conductor pattern 18 is formed between the conductor pattern 18 and the conductor pattern 18, which overlaps the transfer disk pattern 24 of the minor loop 17-2 to form a transfer gate. When the bubble 20 is transferred to the position shown in Fig. 6, when a pulse current is applied to the conductor loop of the pin-shaped conductor pattern 18 and the bias magnetic field is locally weakened, the bubble 20 is Stripe out. The other end of the striped magnetic domain reaches the transfer disk pattern 24 of the minor loop 17-2. Eventually, when the direction of the rotating magnetic field H changes from the direction A to the direction R of B, a magnetic pole that attracts the bubble 20 is formed in the transfer disk pattern 24, so that the conductor loop of the hairpin-shaped conductor pattern 18 forms a magnetic pole that attracts the bubble 20. Even when the flowing pulse current is turned off, the bubble 20 remains in the transfer disk pattern 24.
It has been transferred to the ``mouth'' position in the periphery of the mouth.

Next, as the rotating magnetic field HR rotates in directions C and D, the bubble 2 transferred to the minor loop 17-2
0 moves to positions "C" and "2" around the transfer disk pattern 24. In this way, Mejiya
When a transfer path is formed with a predetermined gap between the disk patterns forming the loop 16-1, the medium loop 16
When transferring from -1 to minor loops 17-1 to 17-N, there is no need to cross the major loop pattern itself as in the case shown in FIG.
Therefore, it is sufficient that the current level of the pulse current for performing the above-mentioned transfer is small.

In addition, in FIG. 6, one bubble 20 was explained, but
Similarly, as explained in FIG.
Cross the bubble row on the super track S of No. 1 to the minor loop 17-1 to 17 across the butt track B.
It goes without saying that it can be transferred to -N. At the time of reading, as explained in FIG.
, so the time series of writing and reading match.

As explained above, according to the present invention, the major transfer disk pattern corresponding to the minor loop transfer disk pattern is
By forming a major loop pattern transfer path with a predetermined gap in the loop disk pattern, the pulse current required to transfer the bubble from the major loop to the minor loop is small, and writing and reading can be performed easily. The time series of can be matched.

[Brief explanation of drawings]

Fig. 1 is an explanatory diagram illustrating the relationship between the crystal direction of the magnetic thin film bubble crystal and the transfer path, and Fig. 2 is the basic operating principle of the beaded disk pattern transfer path having a super track S and a butt track B. Explanatory diagrams for explaining, Figures 3 and 4
The figure shows a conventional write/read transfer gate in a beaded disk pattern transfer path.
FIG. 6 is an explanatory diagram for explaining the loop and minor loop bubble tracks, and FIG. 6 is an operational principle diagram for explaining the operation of the present invention. In the figure, 16-1 and 16-2 are mezzilla loops, 17-1
or 17-N is a minor loop, 20 is a bubble, 21
2 represents a disk pattern, 22 and 23 represent an oval disk pattern, and 24 represents a transfer disk pattern.

Claims (1)

[Claims] 1. A major line that has a transfer path with a cascading disk pattern and transfers information bubbles through the transfer path, a plurality of minor loops that store the information bubbles, and a plurality of minor loops that store these information bubbles in the minor loops. In a bead-shaped disk pattern magnetic bubble device having a write circuit for writing information and a read circuit for reading information bubbles written in the minor loop onto the major line, each loop constituting the minor loop is The disk pattern of the corresponding major line is arranged at a predetermined interval on the pubble transfer path of the corresponding major line, and the transfer of at least one of the write and read of magnetic bubbles between the major line and the minor loop is performed as described above. A bead-shaped disk pattern magnetic bubble device characterized by making use of gaps.