JPS59152605A - Laminated inductor - Google Patents

Abstract

PURPOSE:To realize multiple connection and lamination easily and securely by a method wherein a coil-shape electrode is provided to one main surface and a connection electrode is provided to another main surface of the 1st insulation sheet and a cut-hole which pierces both surfaces is also provided to the 1st insulation sheet and the same electrodes are provided to the corresponding positions of the 2nd insulation sheet and the plurality of the 1st insulation sheets and the 2nd insulation sheets are laminated alternately. CONSTITUTION:Laminating substance of green sheets 1-7 is heated to the temperature more than the softening point and plastic deformation is made by giving enough pressure from the top and the bottom to make a solid body. An internal connection part 21a of a coil-shape electrode 21 is pressed to contact and made solid with a connection electrode 23c on the back surface of the green sheet 3 through a cut-hole 15 of the green sheet 2. Then the connection electrode 23c is pressed to contact and made solid with an internal connection part 22a on the front surface of the green sheet 2. With the same procedure, the internal connection parts and the connection electrodes are connected successively through the cut-holes and lead-out parts 21b, 26b of the coil-shape electrodes 21, 26 are connected to form a coil-shape inside the laminated body of the ceramic green sheets 8-14. When the body is sintered, connection parts of the internal electrodes also start being sintered with each other to form the coil-shape electrode.

Description

[Detailed description of the invention] Industrial applications The present invention relates to laminated products.

Structures of Conventional Examples and Their Problems In general, multilayer ceramic inductors have been produced by a so-called printed lamination method (hereinafter referred to as the printing method). The printing method uses magnetic or non-magnetic insulator paste and electrode paste as printing inks to create a laminated inductor by alternately printing insulators in layers and electrodes in coils, and repeating drying. . FIG. 4 is an explanatory diagram showing the steps of the above printing method in sequence, FIG. 5 is a perspective view of a laminated inductor produced by the printing method, and FIG. 6 is a longitudinal sectional side view of the same laminated inductor. In step (a), the insulator 0]) is printed on the first printing machine, the insulator 0]) is printed on the second printing machine, and the electrode (to) is printed on the 8th In step (c), the insulator (to) is printed with the first printer, in step (c), the electrode is printed with the fourth printer, and in step (e), the insulator is printed. Print (2) and process (
) is printed on the electrode by the sixth printing machine, in step (g), the insulator 0b is printed by the first printing machine, and in step (a), the electrode (to) is printed by the fourth printing machine. Print. process) to process (
Paper lamination is performed by sequentially repeating the procedure in g) with drying between each printing. Finally, in the step (the electrode on the opposite drawer side corresponding to the electrode (A) of C7l is printed using the sixth printing machine and dried, and further an insulator for protection is printed and dried. In this way, the completed laminated layer is The inductor is as shown in FIG. 5, where θ(1) is the part of the electrode ring forming the coil that extends to the outside.

This is fired and an external terminal θ11 is attached as shown in FIG. 6 to form a multilayer ceramic inductor.

In this way, the printing method requires six printing machines, printing,
There is the necessary power to perform drying continuously as a series of operations.
Since the drying time generally takes several minutes to several tens of minutes, it is necessary to produce a single variety in large quantities in order to make effective use of machinery and equipment. Because the time required for printing is from several seconds to several tens of seconds, it is inevitable that several dozen to several hundred sets of printing will be performed in succession. In addition, since one set of inductors is usually printed in the range of tens to thousands, it can be said that manufacturing laminated inductors using this printing method is suitable for small-variety, mass production. That is, there are a large number of printing machines, and when changing products, it is necessary to simultaneously align the printing screens, and it is also necessary to change electrodes and insulators at the same time, both of which are extremely complicated.

On the other hand, the sheet method is used to manufacture multilayer capacitors, etc., but according to this sheet method, sheets prepared by methods such as the doctor blade method, extrusion molding method, and roll coater method are used. Electrodes of various shapes are printed and dried on insulating sheets made of various materials processed into shapes, and these sheets can be laminated in various combinations. The stacked sheets are unified by pressure and heating, cut into individual pieces, fired, and completed through processes such as adding terminal electrodes. However, in the case of laminated inductors, there has been no structure suitable for manufacturing by such a sheet method, and it has been difficult to use the sheet method. 'Purpose of the Invention The present invention solves the above-mentioned conventional drawbacks, and provides a laminated inductor that can easily and reliably connect and laminate a large number of internal coil electrodes while taking advantage of the sheet method's characteristics that are suitable for high-mix, low-volume production. The purpose is to obtain.

Structure of the Invention In order to achieve the above object, the laminated inductor of the present invention has the following features:
A first insulating sheet having a coiled electrode on one main plane, a connecting electrode on the other main plane, and a cutout penetrating the two planes, and a coiled electrode on one main plane. having an electrode, and the first insulating sheet on the other main plane;
and a second insulating sheet having connection electrodes at positions corresponding to the notches of the first insulating sheet and having notches penetrating both main surfaces formed at positions corresponding to the connection electrodes of the first insulating sheet. It has a structure in which layers are alternately stacked.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

Figure 1 is a plan view of various green sheets printed with electrodes, Figure 2 is a cross-sectional view of these green sheets before lamination pressing, and Figure 8 is a green sheet that has been laminated, pressed, and heated to form an integrated green sheet. It is a sectional view of a layered product. (1)-(7)
is a green sheet with printed electrodes and cutouts,
(8) ~ Q4 are ceramic green sheets whose main materials are magnetic or non-magnetic powder and a synthetic resin binder, ba- (g) is each ceramic green sheet (8)
The coiled electrodes printed on the upper surfaces of ~03 and m~0 are cutouts formed in each of the ceramic green sheets (9) to (c).

The green sheets (1) to (7) are arranged and stacked as shown in FIG. This laminate of green sheets (1) to (7) is heated to a temperature above the softening point, usually about 40°C to 100°C, and the weight is usually 100'kg/d to 1'0cm from the top and bottom.
A sufficient pressure of about 0.00 kg/d is applied to cause plastic deformation, and the pieces are integrated as shown in FIG. At this time, in Fig. 2, the internal connection part (21a) of the coiled electrode (2D) is crimped and integrated with the connection electrode (28c) on the bottom surface of the green sheet (3) through the notch (to) of the green sheet (2). Further, the connection electrode (28c) is crimped and integrated with the internal connection part (22a) on the upper surface of the green sheet (2).Similarly, the internal connection part (22bX2ab) ( 28a) (24a) (2
4b) (25bX25aX26a) and connecting electrode (24
C) (25c), (26c), and (27c) are connected in sequence to form a coiled electrode C! υ (to) drawer part (21b
) (26b) is the inside of the laminate of ceramic green sheets (8) to ◇ in a coil shape.

Then they are connected as shown in Figure 8. At this time, the connection parts of the ceramic green sea (8) to (1, 41 and the inner coiled electrode υ) are each deformed as shown in FIG. 8, and are firmly compressed and crimped to be integrated. If firing is performed in this state, the ceramic and the electrode will sinter each other and each other.
It becomes a complete sintered body. Furthermore, the internal electrode extraction part (21b)
A terminal electrode is added to (26b) to form a multilayer ceramic inductor. That is, during sintering, the connecting portions of the internal electrodes are also sintered together, forming a coiled electrode.

DETAILED DESCRIPTION OF THE INVENTION According to the present invention, various sheets with electrodes printed on the front and back sides and cutouts provided in some parts are prepared, and by combining them as necessary, various types of sheets can be produced. You can get laminated inductors, high-mix low-volume production,
'r! It has the advantage of being easy to apply to irregular coil shapes, multiple coils, etc., and has extremely high industrial utility value.

[Brief explanation of the drawing]

Fig. 1 is a plan view of various green sheets used for manufacturing a laminated inductor in an embodiment of the present invention, Fig. 2 is a cross-sectional view of the same, Fig. 8 is a cross-sectional view after laminated crimping, and Fig. 4 is a conventional laminated inductor. FIG. 5 is a perspective view of the same laminated inductor, and FIG. 6 is a sectional view thereof. (1)~(7)...green sheet, (8)~0xun・
...Ceramic green sheet, Q phrase ~ O groan... cutout, 6! I) (E) Coiled electrode, (23c)
~(27c)...Connection electrode agent Yoshihiro Morimoto Figure 1 Figure 4 I Figure S Figure 8, Figure 8

Claims (1)

[Claims] 1. A first insulating sheet δ having a coiled electrode on one main plane, a connecting electrode on the other main plane, and a notch penetrating the biplanar planes; one main plane; The first insulating sheet has a coiled electrode on one plane, a connecting electrode on the other main plane at a position corresponding to the notch in the first insulating sheet, and a notch penetrating the biplanar plane. A laminated inductor in which sheets are alternately laminated with second insulating sheets formed at positions corresponding to connection electrodes.