JPS59912B2 - module - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a module, in particular a magnetic bubble memory element that utilizes a single magnetic domain represented by a concave magnetic domain, is integrated with a drive magnetic field generating coil, a magnet for applying a DC bias magnetic field, etc., and a shield case is provided. The invention relates to a magnetic bubble memory module housed within the device.

In recent years, magnetic bubble memory devices have been developed and put into practical use, and magnetic bubble memory modules with various structures have been put into practical use.

Of these module structures, there are many with different structures inside the shield case (for example, coil type), and there are also various types of shield cases. For example, as shown in Figure 1, there is a so-called lunch box-shaped case made by stacking two permalloy containers 1 and 2 of slightly different sizes, or a square cylindrical case with both ends open as shown in Figure 2. There are 3 etc. Considering the magnetic circuit between the bubble memory element, the magnet for applying a DC bias magnetic field, and the shield case, the type shown in Figure 2 is superior, so the type of shield case shown in Figure 2 is often used. . However, in the case of a bubble memory module, since the magnetic field must be applied uniformly to the bubble memory element, there are usually considerable restrictions on the position of the bubble memory element relative to the shield case and magnet, and in the case of the type shown in Figure 2, , it becomes quite difficult to locate the bubble memory element. Further, as shown in FIG. 3, a structure in which a bubble memory element 31 and a driving magnetic field generating coil 33 are integrated on a substrate 32 to which a lead frame 34 is brazed is often used. In this case, usually the lead frame 3
The legs of No. 4 are connected as shown in the figure (by so-called tie bars 35), and the tie bars 35 are usually cut off after the module is assembled. (If you cut the tie bar in advance, it will easily bend and become damaged during the process.)
The object of the present invention is to use the open-ended shield case shown in FIG. 2, which is excellent in terms of magnetic circuit, as described above, and to create a module such as a magnetic bubble memory that satisfies all of the above-mentioned requirements. It is about providing.

According to the present invention, in a magnetic bubble module in which a structure in which a magnetic bubble element, a driving magnetic field generating coil, and a DC bias magnetic field applying magnet are integrated is housed in a rectangular cylindrical shield case with both ends open, the above-mentioned shield case is provided. A magnetic bubble memory module is obtained in which the open end surface of the magnetic bubble memory module is sealed with molded terminals separated into two parts.

Next, an embodiment of the present invention will be described with reference to FIGS. 4a-d.

A drive magnetic field generating coil 43 is attached around a ceramic case 42 in which a bubble memory element 41 is mounted as shown in FIGS. The structure connected by attaching or the like is housed in a predetermined position in the shield case 45 shown in FIG.
The tube is placed on the open surface of the tube and sealed as shown in FIG. 4d.

At this time, in order to release the heat generated inside the case 45 (particularly the heat generated by the coil), a resin with good thermal conductivity or a
Grease 47 is also filled into the shield case 45. (Resin and bias field magnets are omitted in the figure) As described above, according to the present invention, even if the lead frame has a tie bar 10, there is no problem because the molded terminal is divided into two, and the sealing Can be stopped.

For example, if the molded terminal is integrally molded as shown in FIG. 5, it is not suitable because the foot cannot be passed through. Furthermore, the positioning of the structure including the bubble memory element 41, the drive magnetic field generating coil 43, etc. can be done with considerable accuracy because it is determined by the dimensions of the molded terminal. Furthermore, when the lead is bent, the end of the case becomes a molded terminal, so the lead and the shield case come into contact, and accidents such as shorts do not occur.

[Brief explanation of the drawing]

Figure 1 is a sectional view showing an example of the type of shield case, Figure 2
The figure is a perspective view showing a shield case used in the present invention, Figure 3 is a perspective view showing a magnetic bubble memory module structure, and Figures 4 a to 4 d are plan views showing an embodiment of the present invention along the process order Figure (a) is a sectional view (a● in the same figure) and a needle perspective view (b-d in the same figure). Fig. 5 is a perspective view showing an example of an inappropriate molded terminal. 41...・・Bubble memory element, 42・・・・
... Ceramic case, 43 ... Drive magnetic field generating coil, 44 ... Board with lead frame, 45
......Shield case, 46...Mold terminal.

Claims (1)

[Claims] 1. A module in which a functional device is housed in a cylindrical shield case with both ends open, characterized in that the open end surface of the shield case is sealed by combining two mold plates.