JPS5930291A - Magnetic bubble transfer path - Google Patents

Abstract

PURPOSE:To obtain a loop transfer path having an even-bit length, by specifying quantities of cyclic structures forming magnetic bubble transfer patterns on both sides of the line which divides the tranfer path in the lengthwise direction into two. CONSTITUTION:Magnetic bubble transfer patterns A and A' on both sides of a line 20 which divides the magnetic bubble transfer path into two are formed with N-number and (N-1)-number of cyclic structures such as 5 and 4 cyclic structures, and the bit length of the loop transfer path is an even number N+ (N-1)-1. This transfer path is so constituted that (n-1)-number of cyclic structures having a length (n/n-1)(p) are included in the pattern formed with (N-1)-number of cyclic patterns when the length of the cyclic structure in the pattern formed with N-number of cyclic structures is denoted as n(p).

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a magnetic bubble transfer path, and more particularly to a magnetic bubble transfer path for an ion-implanted magnetic bubble device.

Conventionally, in magnetic bubble elements, in order to transfer magnetic bubbles (hereinafter simply referred to as bubbles), T-bar bangs,
A permalloy element shaped like a YY pattern or an asymmetrical four-shape pattern was formed on a magnetic fiber net (hereinafter referred to as a permalloy device). However, in a magnetic bubble element using such a permalloy transfer pattern, it is difficult to reduce the bubble diameter to about 1 μm or less.
It has become very difficult in terms of ring sizing technology and drive technology to form patterns. Therefore, a continuous disk bubble device (hereinafter referred to as a CD device) was proposed as a method of obtaining a magnetic bubble device with a higher density.

The basic concept of bubble transfer using a continuous disk pattern is described in N.I.B. Conference Proceedings (A.

I, P, Conference Proceedings
ings') No. 1θ, page 339 (1973) as a paper by Well 7 Ella. Regarding the structure of the contiguous disk bubble element, the IEEE Transactions on Magnetics (IEEET) by Lin et al.
Rans, on Magnetics) Volume 15, No. 1
642 pages (1979) and Therbel System Technical by Nernon et al. of Bell Laboratories. journal(
The Be1l System Technica
Journal) Volume 59, Page 229 (19
This is as detailed in papers such as 1980).

Conventionally, bubble devices have a major/minor type memory configuration, that is, they consist of a minor loop for storing information and a major loop or major line for writing and reading information. The lengths of these major loops and minor looses are determined by the length of data to be handled, how to process defective loops, etc.

Figure 1 shows the shape of a general bubble transfer path used in CD devices. Figure 1 (a) is a symmetrical transfer path with a series of circular basic patterns, and Figure 1 + b) is a triangular basic pattern. This is a transfer path with a staggered structure in which the patterns are shifted by half a cycle on the top and bottom. In Figure 1, both transfer paths are indicated by numbers 1 to 9, and have a structure that can accommodate 9 puzzles.
It has a bit length.

Generally, when a bubble transfer path is constructed by connecting N basic patterns of a certain shape, the length becomes 2N-1 bits. Since N is a positive V number, it can only be an odd number, which has the disadvantage that a loop of even numbered pits cannot be constructed.

The purpose of the present invention is to eliminate such conventional drawbacks,
The purpose is to provide a loop transfer path with an even number of pit lengths.

According to the present invention, in a magnetic puzzle transfer path consisting of a pattern in which arbitrary figures formed by ion implantation in a magnetic film capable of holding a magnetic puzzle are periodically arranged, the magnetic bubble transfer path is extended in the longitudinal direction. With the straight line dividing it in two as the border,
A magnetic bubble transfer path is obtained which is characterized in that one side has an N periodic structure and the other side has an N-1 periodic structure.

Furthermore, according to the present invention, the nω)th (1st
The magnetic bubble transfer path described in section ) is obtained.

An embodiment of the present invention will be explained below with reference to the drawings. FIG. 2 is a pattern diagram showing one embodiment. In Figure 2, the transfer path is divided into upper and lower halves, and the boundary is 120 (
Then, it is divided into transfer paths A and A'. In the transfer paths A and A', if the repetition period of the circular basic pattern is P, then in Fig. 2(a), there are two patterns of length P in the part with length 2p on the upper side, and 2 patterns on the lower side with length 2P. The pattern is made up of L peripheral holes F. Figure 2 (b) is a part with a length of 3P, the upper part has 3 patterns of length P, and the lower part has a length of 3P.
/2 pattern is composed of two periodic structures. Furthermore, in Fig. 2 (C), the part with a length of 5P is composed of a circumferential hole structure with 5 patterns of length P on the upper side and 4 patterns of length 5P/4 on the lower side. . That is, na for heat.
In the part p (-period length), the upper side has n patterns of length P, and the lower side has length n/n 1. The pattern of p is n
−1 periodic′! It was originally built in f.

These transfers p A and A' are 8 bits long, as indicated by numbers 1 to 8 in FIGS. 2(a) and 2(c), respectively. To express this generally, the transfer path has a periodic structure with N pieces on the upper side and N-1 pieces on the lower side! 5.2(?'!-
1) It becomes a bit-length loop transfer path, and the position that accommodates an even number of bubbles is closed.

FIG. 3 is a pattern diagram showing another embodiment.

In FIG. 3, the transfer path is divided into transfer paths B and B' at a straight line 20 that extends upward and downward by 2 minutes. Second transfer path B, B
If P' is the repetition period of the triangular pattern, then in Fig. 3(a) there are two patterns of length 2F', the lower part has two patterns of length P', and the upper part has length 2P'. The pattern is one periodic structure. Figure 3(b) is a part with a length of 3P', or the lower part has three long P' patterns and the upper part has a length of 3P'/
The pattern of 2 is two periodic stone structures. Furthermore, in Fig. 3(C), the part with length 5P' is composed of a periodic structure with 5 patterns of length P' on the lower side and 4 patterns of length 5P'/4 on the upper side. .

As shown by numbers 1 to 10 in FIGS. 3(a), 3(b), and 3(c), these transfer paths B and B' have a length of 10 bits. To express this generally, the transfer path has a periodic structure in which the lower transfer path B' is N and the upper transfer path B is N-1, and a loop transfer path with a length of L2 (N-1) bits is formed. A position is obtained that accommodates an even number of bubbles.

Although circular and triangular transfer paths have been described in the embodiments of the present invention, the present invention is effective not only for these transfer paths but also for bubble transfer patterns whose basic patterns are arbitrary shapes.

As explained above, the present invention has the effect of providing a loop transfer path with an even number of bit lengths as a position for accommodating bubbles.

[Brief explanation of the drawing]

FIG. 1 is a pattern diagram showing a conventional bubble transfer path, FIG. 2 is a pattern diagram showing an embodiment of the present invention, and FIG. 3 is a pattern diagram showing another embodiment of the present invention. 1 to 10... Pit position, 20... Straight line that bisects the transfer path in the longitudinal direction, A, A', B, B'.
... Transfer path. Ward 1 (0nwo Misaki Ward 2 ((1)

Claims (2)

[Claims] (1) In a magnetic bubble transfer path consisting of bars in which arbitrary shapes formed by ion implantation into a magnetic film capable of holding magnetic bubbles are periodically arranged, the magnetic bubble transfer path is extended in the longitudinal direction. A magnetic bubble transfer path characterized in that one side of a straight line dividing the line into two has N periodic structures and the other side has N-1 periodic structures. (2) For the length of N periodic structure side nω), N-1
The magnetic puzzle transfer path according to claim 1, characterized in that it has n-1 lengths (n/n-1·ω) on the periodic structure side.