JPS6011390B2 - Module for magnetic bubbles - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a magnetic bubble module used in a memory device using magnetic bubble elements.

In order to drive a magnetic bubble element, a rotating magnetic field within the plane of the magnetic bubble chip is required, and FIG. 1 is a perspective view showing the most common configuration of a magnetic bubble module for providing a rotating magnetic field.

In the figure, 1 and 2 are rectangular solenoid coils that are orthogonal to each other.
By passing sinusoidal currents having a phase difference of 90 degrees through each of the coils, a rotating magnetic field is created inside the rectangular solenoid coil body, which is applied as a driving magnetic field for the magnetic bubbles present in the magnetic bubble chip mounted on the substrate 3. As is clear from Fig. 1, in order to extract the leads of the magnetic bubble chip from the mutually orthogonal rectangular solenoid coils,
One rectangular solenoid coil is made large, and leads are drawn out from the gap created by using an R-shaped or L-shaped ceramic substrate 3 or a flexible substrate. FIG. 2 shows an example of such a specially shaped substrate. In the figure, 10 indicates a magnetic bubble chip 7, which is a wiring pattern on the substrate. Furthermore, in the configuration shown in Fig. 1, if there is a defect in the chip on the board or a defect occurs, the rectangular solenoid coils 1 and 2 are removed and the board 3 is taken out. In the case where grease having good thermal conductivity is filled between the rectangular solenoid coil and the regulating plate of the bias magnetic circuit for the purpose of cooling the temperature rise due to heat generation, there is a drawback that maintainability becomes particularly poor. The purpose of the present invention is to eliminate the drawbacks of the prior art described above, to easily extract the leads without using a specially shaped board, and to provide easy maintenance using such a magnetic bubble drive coil. We are here to provide magnetic bubble module.

In order to achieve the object, the present invention requires two parallel main planes for generating the driving magnetic field and one conductor wire to constitute these main planes, instead of one of the secondary rectangular solenoid coils. A new coil is used in which one of the sub-planes is arranged so that an opening is always present in combination with the rectangular solenoid coil. The present invention is a magnetic bubble module characterized in that a drive coil body composed of a coil is housed in an internal space of a magnetic bubble bias magnetic circuit composed of a magnetic shunt plate and a permanent magnet.

DESCRIPTION OF THE PREFERRED EMBODIMENTS The magnetic bubble module according to the present invention will be described below with reference to the drawings.

FIG. 3 is a perspective view showing the structure of a coil used in the present invention;
It is. 4 and 4' are main planes of the coil, and 5 and 6 are subplanes.

In the example shown in this figure, the main plane consists of a straight section and a quadrant section of the winding, so that the sub-planes 5 and 6 are orthogonal to each other. When this coil is combined with a normal rectangular solenoid coil 1 as shown in FIG. 4, the sub-plane 5 does not block the entrance of the coil 1. Therefore, the substrate 3 may be a normal rectangular flat plate as shown in the figure. Therefore, by installing such a drive coil body in a well-known bias magnetic circuit 8 that applies a perpendicular magnetic field, a magnetic bubble module is completed. FIG. 5 is a perspective view showing a module structure for magnetic bubbles according to the present invention.

81 and 82 are magnetic shunt plates made of a high permeability magnetic material such as ferrite, and 91 and 92 are permanent magnets.

That is, it is a structure that guides the magnetic flux from the permanent magnets 91 and 92 and applies a uniform bias magnetic field to the space between the magnetic shunt plates.
A drive coil body and a substrate 3 shown in FIG. 4 are installed in this space. As is clear from FIG. 5, the board 3 can be freely inserted and removed without removing the coil, which not only facilitates maintenance such as replacing the magnetic bubble chip, but also eliminates the need to disassemble the drive coil body during maintenance. The coil body can be bonded and fixed to the magnetic field shunt plate with a resin having good thermal conductivity, and it becomes possible to effectively dissipate heat from the coil. Note that the winding on the main plane consists of a parallel straight part 41 for obtaining a uniform magnetic field, and a connecting part 42 connecting this to the sub-plane 5, but the latter does not originally contribute to the uniform magnetic field. , it will be easily understood that even if the shape is as shown in FIG. 6, there is no difference in effect from that shown in FIG. 3.

As mentioned above, the magnetic bubble module according to the present invention not only has excellent maintainability because it is possible to insert and remove the board without disassembling the coil, but also uses a resin with good thermal conductivity between the coil and the magnetic shunt plate. Since it is possible to fill and bond and fix, it also has an excellent heat dissipation effect.

In addition, since it is easy to take in and out the board, it has many effects such as being able to be used for special purposes such as magnetic bubble chip inspection machines, so this technical field will become more and more practical and versatile in the future. The contribution to this is extremely large.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing the structure of a conventional magnetic bubble drive coil, Fig. 2 is a top view of a substrate used in the drive coil shown in Fig. 1, and Figs. 3 and 6 are used in the present invention. FIG. 4 is a perspective view showing the structure of the drive coil body used in the present invention; FIG. 5 is a perspective view showing the structure of an embodiment of the magnetic bubble module according to the present invention. It is. 1, 2... Rectangular solenoid coil, 3... Substrate, 4, 4'... Main plane constituting the coil, 5, 6...
...Subplanes forming the coil, 81, 82...
・Magnetic adjustment plate, 91, 92...Permanent magnet. Oh picture soup 2 picture spear 3 picture soup 4 picture spear 5 picture soup S picture

Claims (1)

[Claims] 1 Consisting of two mutually parallel main planes made of conductor wire and two sub-planes that connect the main planes, and the main plane is connected to a parallel straight section of the conductor wire of approximately the same length and the parallel straight section. and has a connecting portion connected to one of the sub-planes, and the two sub-planes form an angle of 90 degrees to each other, and the main plane and the sub-plane are composed of one conductor wire. The driving coil body, which is assembled with a coil and a rectangular solenoid coil having an opening on one side and a board carrying a magnetic bubble chip can be inserted into the opening, is inserted into the internal space of a magnetic circuit that applies a vertical bias magnetic field. A module for magnetic bubbles that is characterized by being able to be stored.