JPS60688A - Magnetic bubble element - Google Patents

Abstract

PURPOSE:To minimize an ineffective area and to improve mounting density by tilting only a part requiring the best transfer characteristic in matching with the crystal anisotropy of a magentic film and arranging orthogonally the rest part to a major line or a major loop. CONSTITUTION:An angle of theta=60 deg. is given for one bit's share of a part 13 of a minor loop 12 close to the major loop 11 and other parts 14 of the minor loop 12 are arranged so as to be at a right angle (theta=90 deg.) to the major loop 11. Fig. (b) shows the major/minor loop constitution where the major loop 11 and the minor loop 12 are abbreviated by straight lines, the ineffective region is decreased in comparison with that of conventional constitution and the high density is attained by nearly 30%.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in the configuration of a magnetic bubble element in a continuous disk system suitable for a high-density magnetic bubble element.

FIG. 1 shows the principle of magnetic bubble transfer in the continuous disk system.

Formed on a non-magnetic substrate G, it has -axis anisotropy.

A photoresist 1 is placed on the magnetic film 7 that can hold the magnetic bubble 4.
Alternatively, a disk-shaped mask 5 made of gold or aluminum-copper alloy is formed, and hydrogen ions, helium ions, etc. are implanted into the exposed portions to form an ion-implanted film 1. As it turns, the magnetization of u mulberry 1 becomes oriented in the 1st direction. Magnetization 2 parallel to the plane of this film l
is changed in its direction by a rotating magnetic field 3 applied to the surface of the membrane 1. Accordingly, the magnetic bubble 4 will be transferred along what will become the edge of the disk 5.

In this way, since the continuous disk system 'C uses continuous disks 5 for transferring the magnetic bubbles 4, there is no gap in the transfer pattern as in the conventional memory system. For this reason, the transfer pattern has the characteristics of being easy to cut and achieving high density.

In this continuous disc method, as shown in Figure 2, the major line or major loop 8
Bubble transfer between and minor loop 9 is required.

This transfer is performed by passing a current through a conductor provided between the major line or the major loop 8 and the minor loop 9. By the way, due to the crystal anisotropy of the magnetic film 7, this transfer characteristic depends on the angle θ between the major line or major loop 8 and the minor loop 9. For this purpose, a configuration in which the entire minor loop 9 is arranged at an angle of 0 = 60 degrees with respect to the major line or major loop 8 is known (for example, in the literature, Y, S, L j, ne+- , al.

IEEE TRANSACTION ON MAGNET
IC8, MAG-15 (1979) 1642). FIG. 3 shows a membrane configuration in which the major loop 8° and the minor loop 9 shown in FIG. 2 are abbreviated with straight lines to show the major loop 8 and the minor loop 9. 5. However, as is clear from FIG. 3, this I4 configuration has the disadvantage that the ineffective area 10 increases on the chip, making it difficult to achieve high density.

Therefore, an object of the present invention is to provide a magnetic bubble element that can solve the above-mentioned drawbacks of the major loop/minor loop configuration or the major line/minor loop configuration in the continuous disk system and can achieve high density.

In order to achieve the objective 1 above, in the present invention, the minor loop is arranged orthogonally to the major line or the major loop, and the minor loop is located only in the portion near the major line or the major loop described in 1. 1. The magnetic bubble element is arranged so as to be inclined with respect to the major line or the major loop.

The feature of the present invention is that the fiH% of the conventional configuration is
Eliminating most of the efficiencies becomes ++J ability, and its viscosity and density are achieved.

In other words, in the invention, only the part where the transfer characteristics can be seen most, that is, the major line or the part of the minor loop closest to the major loop, is tilted in accordance with the crystal anisotropy of the magnetism, and the transfer characteristics are By arranging the remaining portions which are not so required, orthogonal to the major line or major loop, the ineffective area is minimized and the packaging density per chip is improved.I7).

Hereinafter, the present invention will be explained in detail using the drawings.

FIG. 4 shows the major line/minor loop 4/15 configuration or the partial 4/15 configuration of the major loop/minor loop configuration of the magnetic bubble element according to the present invention. In the figure, 11 is a major loop, and 12 is a minor loop. and.

The minor loop 12 consists of two parts, a part 13 and a part I4. That is, the part 13 of the minor loop 12 close to the major loop 11 has an angle of 0 = 60 degrees, and the other part 14 of the minor loop 12 is at a right angle (0 = 9 'O
degree) arrangement (14 configurations). Figure 5 shows the following:
Major loop 11 and minor loop 12 of the 41st al.
This is a major/minor loop configuration, which is abbreviated as a straight line. As is clear from the figure, the ineffective area is smaller compared to the conventional configuration shown in Figure 3, and therefore approximately 30%
It is shown that a high density of 'X can be achieved.

[Brief explanation of the drawing]

Figure 1 is for explaining the principle of magnetic bubble transfer in the continuous disk method (January')! 1fi
Figure i and Figure 2 are major/minor loop configuration diagrams in the conventional continuous disk system. Figure 3 is an overall configuration diagram showing the major/minor loops shown in Figure 2 with ll'8 notation. 41 So 1 is the major/minor loop 4i15 composition in the continuous disk system invented by A- Invention, 501 et The entire major/minor loop shown in Figure 11'& Pl: i marked. FIG. 1...Ion J1-containing film, 2...Magnetization, :3...
Rotating magnetic field, 4...Magnetic bubble, 5...De, C suf,
6...Nonmagnetic substrate, 7...Magnetic' film, 8.11...
・Major line or major loop, 9, 12...
・Minor loop. City 1 Figure rate 3 Figure city 4 Figure 4 item -m- Figure 5 1 -50・

Claims (1)

[Claims] ■Major loop/minor loop configuration or major line/minor loop configuration in continuous disc method
In the minor loop configuration, the minor loop is arranged orthogonally to the major line or major loop, and only the portion of the minor loop that is close to the major line or major loop is carved into the major line or major loop. A magnetic bubble element characterized by being arranged in an inclined manner.