JPS5942688A - Magnetic bubble storage device - Google Patents

Abstract

PURPOSE:To transfer bubbles between the first transfer path and the second transfer path on two ways, by providing a means which can supply the first current pulse and the second current pulse, whose polarity is different from that of the first current pulse, to a conductor pattern on a magnetic bubble element at an interval of a prescribed time. CONSTITUTION:When a bubble comes to a position 16, a rotating magnetic field is directed to an arrow 7. When a bipolar current pulse supplying means 5 is used to apply the first current pulse directed to an arrow 40 to a conductor pattern 3 with this phase, a bias magnetic field distribution is induced in the gap part between the first transfer path 1 and the second transfer path 2 because of the disturbance of a current distribution which is generated by the first notch 13 and the second notch 14 provided in the conductor pattern 3. By this bias magnetic field distribution, the bubble in the position 16 is transferred to a position 17. Thus, the bubble is transferred on two ways between the first and the second transfer paths 1 and 2, which are formed at the interval, with a simple element constitution.

Description

[Detailed description of the invention] The present invention relates to magnetic bubble storage devices.

In a conventional magnetic bubble device (hereinafter referred to as a conventional magnetic bubble device) that uses permalloy batan to transfer shiva pull, the permalloy batan must be formed by forming a very narrow gap, and the formation of this gap is very fine. This becomes a limitation in processing and prevents improvement in IFIL after memorization.

To overcome the drawbacks of such conventional magnetic bubble devices, US Pat.
In the specification of No. 329, a continuous disk type magnetic bubble element was proposed in which bubbles are transferred along a transfer path consisting of multiple non-implanted tr4 regions formed by selectively implanting ions onto a magnetic thin film. It was done. In order to shorten the bubble access time in a continuous disk type magnetic bubble element, it is absolutely necessary to realize a major/minor configuration like the one already adopted in the conventional type magnetic bubble element.

) N In order to realize this major-minor one-sided system with a strict element configuration, it is necessary to There is a need for a bidirectional transfer gate that can transfer bubbles to the first transfer path and transfer bubbles from the second transfer path to the first transfer path with good controllability. However, a bidirectional transfer gate using a single conductor pattern has not yet been proposed.

An object of the present invention is to provide a magnetic bubble storage device that can realize bidirectional bubble transfer between a first transfer path and a second transfer path formed with a gap in between with a very simple element configuration. There's K things to do.

That is, the present invention provides a first transfer path and a second transfer path formed by selectively implanting ions onto a magnetic thin film capable of retaining magnetic bubbles, and a first transfer path formed between the two transfer paths. A first current pulse and a second current pulse having a different polarity from the first current pulse are applied to a continuous disk type magnetic bubble element having a conductor pattern and a conductor pattern on the magnetic bubble element at predetermined time intervals. This is a magnetic bubble device characterized by comprising a means for separately supplying a bubble.

Next, the present invention will be described in detail based on an example of implementation of the present invention shown in FIG. 1C-) and FIG. 1(b). Figure 1 (-)
, a first transfer path 1 and a second transfer path 2 are arranged at a constant distance from the first transfer path, and means 5 for generating bipolar current pulses valve the conductor line 4. and is connected to conductor pattern 3. 6 is the direction of the bias magnetic field.

In Fig. 1(b) FC, the vertical axis 31 is the fixed width of the current pulse;
The horizontal axis 32 is the rotation angle of the rotating magnetic field. First transfer path 1
The transfer of bubbles from to the second transfer path 2 is performed as follows. The bubble is transferred to position 16 via position 15 on the first transfer path 1 by a counterclockwise in-plane rotating magnetic field (hereinafter simply referred to as a rotating magnetic field) K. 16 bubbles
When the position is reached, the rotating magnetic field is directed in the direction of arrow 7. When a first current pulse in the direction of arrow 40 is applied to the conductor pattern 3 from this phase using the bipolar current pulse supply means 5, the first current pulse provided in the conductor pattern 3
Due to the disturbance in the current distribution caused by the cut 13 and the second cut 14, the first transfer path 1 and the second transfer path F
IL? A bias magnetic field distribution is induced in the gap between 32 and 32. The bubble at position 16 receives a driving force toward position 17 due to this bias magnetic field distribution, and is transferred to position 17. If the first current pulse continues to be applied over the phase range shown by arrow 11, the bubble will be held at position 17 during this period due to the narrowing of the bias magnetic field distribution occurring at position 17. When the first current pulse ends, the rotating magnetic field is directed in the direction of arrow 8, and at this time a charged wall that attracts bubbles is formed at position 17. Thereafter, the bubble is transferred to the position 18 along the second transfer path 2 as the charged wall is moved by the rotating magnetic field. 34 in FIG. 1(b) is a specific example of the first current pulse.

Transfer of bubbles from the second transfer path to the first transfer path is performed as follows. On the second transfer path 2, the bubble is transferred to position 20 via position 19. When the bubble reaches position 20, the rotating magnetic field is directed in the direction of arrow 9. From this phase, if a second current pulse in the direction of arrow 41 is applied to conductor pattern 3 in the phase range shown by arrow 12, the same process as in the case of bubble transfer from the first transfer path to the second transfer path will occur. 20 of the bubble on the second transfer path
The data can be transferred from the position 21 to the position 21 on the first transfer path. Reference numeral 33 in FIG. 1(b) is a specific example of the second electric Dic pulse. , the rotating magnetic field is oriented in the direction of arrow 10 when the second current pulse ends. Thereafter, the bubble moves from position 22 to 0* and is transferred onto the first transfer path as the nagged wall moves on the first transfer path due to the in-plane magnetic field.

If the first or second current pulse is not applied to the conductor pattern during the bubble transfer as described above, a bubble will occur [the first transfer path or the second transfer path continues to be transferred.

According to the principles of the present invention as described above, bidirectional bubble transfer between the first transfer path y6 and the second transfer path formed across the gap can be realized with a very simple element configuration. be able to.

Figure 2(a) and Figure 2(b) are conductor patterns:
This is a second embodiment of the present invention, in which the shape of No. 3 is changed to a meandering shape. In this embodiment, from the first transfer path 1 to the second transfer path 2
The transfer of bubbles to is performed as follows. When the bubble being transferred through the first transfer path reaches position 16, the rotating magnetic field is directed in the direction of arrow 7. From this phase, when the first current pulse is applied to the conductor pattern 3 in the direction of the arrow 4°, a geometrical potential well is induced in the recess 24 of the conductor pattern 3 shown by the hatching, and a bubble is formed in the four parts 24 of the conductor pattern 3. It extends in stripes along the 1st
If a current pulse of 1.1 is continued to be applied over the phase range shown by the arrow 1.1, the striped bubbles are held at the pull plate 24 shown by hatching during this period. When the current H/L/S of voltage 1 is cut off, the potential well disappears,
The striped bubble tries to shrink back to its original circular shape. At this time, since the rotating magnetic field is directed in the direction of arrow 8, a charged wall that attracts bubbles is formed at position 17, and the bubble shrinks toward position 17. From then on, bubbles are attracted to this charged wall by the rotating magnetic field. It is transferred on the second transfer path 2 as it moves. Figure 2 (
34 in b) is a specific example of the first current pulse.

The second transfer h2 also transfers the bubble to the first transfer path 1 as follows. When the bubble being transferred through the second transfer path 2 reaches the position 20, the rotating magnetic field is
facing the direction of From this phase, if a second current pulse is applied to the conductor pattern 3 in the direction of arrow 41 over the phase range shown by arrow 12, the puzzle at position 2o will be solved by the magnetic field induced by the second current pulse. It is transferred towards position 21 by the gradient. When the second current pulse ends, the rotating magnetic field points in the direction of arrow 8, and a charged wall is formed at position 21 that attracts bubbles. Thereafter, the bubbles are transferred along the second transfer path as the charged wall is moved by the rotating magnetic field. FIG. 2b33 shows a specific example of the second current pulse.

Figures 3 (a and 3f) show a third embodiment of the invention using a conductor button with an opening 3o.

Transfer of bubbles from the first transfer path 1 to the second transfer path 2 is performed as follows. When the bubble being transferred through the first transfer path reaches position 16, the rotating magnetic field is directed in the direction of arrow 7. Arrow 11 from this phase to conductor pattern 3
When a first current pulse having a phase range shown by is applied in the direction of arrow 40, the disturbance of the current distribution caused by the aperture 30 creates a bias magnetic field distribution in the gap between the first transfer path and the second transfer path. is induced. The bubble at position 16 is transferred to position 17 by this bias magnetic field distribution.

If the current pulse continues to be applied in the phase range shown by arrow 11, the bubble will be held at position 17 due to the depression in the bias magnetic field distribution occurring at position 17 during this period. When the first current pulse ends, the rotating magnetic field points in the direction of arrow 8, and at this time a charged wall is formed at position 17 that attracts bubbles. Thereafter, the bubbles are transferred on the second transfer path 2 as the charged wall is moved by the rotating magnetic field. FIG. 3 (34 in bJ is a specific example of the first current pulse.

Transfer of bubbles from the second transfer path 2 to the first transfer 81 is performed as follows. When the bubble being transferred through the second transfer path 2 reaches position 17, conductor slam 3
By applying a second current pulse in the phase range indicated by arrow 12 in the direction of arrow 41, the bubble is transferred to the second transfer path in the same manner as in the case of puzzle transfer from the first transfer path to the second transfer path. The data can be transferred from the transfer path to the first transfer path.

FIG. 4 shows an example of a block diagram of the bipolar flow pulse generating means indicated by reference numeral 5 in FIG. 1(a) l <:fi FIG. 2(a) and FIG. 3(a). be. 50 is a positive current pulse generating section, 51 is a negative current pulse generating section, and 53 is an output terminal. Reference numeral 52 denotes a control section for generating current pulses from the positive current pulse generating section 50 and the negative current pulse generating section 51 at predetermined time intervals.

As described above, if the present invention is implemented, the bidirectional puzzle transfer between the first transfer path and the second transfer path formed across the gap can be achieved with a very simple element configuration. It can be realized with.

The first transfer path '+', the second transfer path, the 11< shape of the conductor slam, the application phase range, amplitude, and pulse width of the first and second current pulses are as shown in Figure 1(a). Figure 1 (b), Figure 2 (su), Figure 2 (b), Figure 3 (su, 3
Various examples other than the embodiment shown in FIG. .

[Brief explanation of the drawing]

Figures 1(a) and 2(a) are diagrams illustrating embodiments of the present invention. Figures 1(b), 2(b), and 3Cb) are diagrams showing the relationship between current pulses and rotating magnetic fields.
'ASJ diagram is a diagram showing a block diagram of bipolar current pulse generating means. In the figure, 1 is the first transfer route, 2 is Italy, 2 is the transfer route, 3 is
is a conductor bang, 4 is a conductor line, 5 is a bipolar pulse generating means, 6 is a bias magnetic field direction, 7, 8, 9
, 10 is the direction of the rotating magnetic field, 11 is the applied phase range of the first current pulse, 12 is the l:l] addition phase range of the second current pulse, and 13.14 is the first and second applied phase range provided on the conductor button. Cut, 15.16° 17.18, 19.20
, 21 and 22 are the positions of the bubbles, 24 is the recess in the conductor button, 30 holes are provided in the conductor button, 31 is the vertical axis that represents the amplitude of the current pulse, and 32 is the horizontal axis that represents the rotation angle of the rotating magnetic field. , 33h second current pulse, 34 is the first ↑ current pulse, 40 is the direction of the first current pulse, 4
1 is a direction for the second bt current pulse, 50 is a positive Ig current pulse 1 generator, 51 is a negative current pulse generation section, 52 is a control section, and 53 is an output terminal. vl ㅅ(pi) 270゜碌1Fig.(b) 0 90 180 2'lD 0
9θ /θ0 (340) Rotation of the rotation of the rotation of the rotation of the rotation of the single a force and the rotation of the rotation of the rotation of the rotation of the rotation of the rotation of the rotation of the rotation of the rotation of the rotation of the rotation of the rotation of the rotation of the rotation of the rotation of the rotation of the rotation of the rotation of the rotation of the rotation of the rotation of the rotation of the rotation of the rotation of the rotation of the rotation of the rotation of the rotation of the rotation of the rotation of the rotation of the rotation of the rotation of the rotation of the rotation of the power of the rotation of the rotation of the rotation of the rotation of the rotation of the rotation of the rotation of the rotation of the rotation of the 9θ/θ0 (340) 9θ/θ0 (340), and the rotation of the rotation of the rotation of the rotation of the rotation of the rotation of the rotation of the single a force, and the rotation of the rotation of the rotation of the rotation of the rotation of the rotation of the rotation. Fish shop (2 money 3 figure (CL) 270' Ladder 3 figure (b) 3i (360n rotation seat - rotation chromaticity (戊)

Claims (1)

[Claims] A first transfer path and a second transfer path formed by selectively implanting ions on a magnetic thin film capable of holding magnetic bubbles, and a conductor pattern formed between the two transfer paths. A first current pulse and a second current pulse having a polarity different from the first current pulse are applied to a conductor pattern on a continuous disk type magnetic bubble element having a conductor pattern at a predetermined time interval. 1. A magnetic bubble storage device characterized by comprising means for supplying a magnetic bubble.