JPH05152133A - Green sheet for inductance component and inductance component using thereof - Google Patents

Abstract

PURPOSE:To realize small size and high integration of an inductance component wherein its heat-resistant property is excellent and it is small-sized and thin or having various kinds of modules using thereof. CONSTITUTION:A green sheet for inductance component is constituted as follows: a first conductor layer 2, a first insulator layer 3, a second conductor layer 4 and a second insulator layer 5 are laminated on a base film 1 by using printing operation; one end of an electrode of the first conductor layer 2 is connected with one end of an electrode of the second conductor layer 4; and a coil is formed. When the green sheet is laminated by a thermal transfer method and baked, it is possible to obtain a high-accuracy inductance component whose surface is flat and in which a printing pattern is not dislocated. Since the surface is flat, it is possible to realize a module in which other functional components can be laminated easily and which has been highly integrated.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an inductance component green sheet and an inductance component using the same.

[0002]

2. Description of the Related Art In recent years, the miniaturization and high density of electronic equipment have led to the miniaturization and thinning of inductance components and the combination with other functional components for higher integration.

Conventionally, various wound-type inductance components in which a conductive wire covered with an insulating coating is wound are known. However, since these have a limit to miniaturization and thinning, recently, an insulating layer and a conductor layer are used. There has been proposed a laminated inductance component by a printing method in which a conductor pattern is formed in an insulator by alternately printing and laminating in multiple layers.

[0004]

However, in such a laminated type inductance component, when the insulating layers and the conductor layers are alternately printed and stacked in layers, irregularities due to the printed pattern of the conductor layers are accumulated. As a result, the unevenness of the surface to be printed next becomes large, and there is a problem in that the print pattern shifts. In addition, especially when trying to manufacture various composite modules by forming inductance components together with thick film resistors and thick film capacitors on a ceramic substrate, it is possible to use different materials with high accuracy because of the above deviation. There is a problem that it is extremely difficult to print and laminate in multiple layers, and it is very difficult to realize a highly integrated module.

The present invention solves the above-mentioned problems, and prevents the deviation of the print pattern and realizes a high-precision inductance component or a highly integrated module green sheet for inductance components (hereinafter simply referred to as a green sheet). (Note) and an inductance component using the same.

[0006]

In order to achieve the above object, the present invention provides a base film, a first conductor layer printed on the base film, and a first conductor layer covering the first conductor layer. An insulator layer, a second conductor layer printed on the first insulator layer, and a second insulator layer covering the second conductor layer, and an electrode of the first conductor layer. The green sheet has a structure in which one end is connected to one end of the electrode of the second conductor layer to form a coil.

Further, the green sheet is placed on a ceramic substrate via an adhesive layer, the base film is pressed, the base film is peeled off, and the green sheet is further fired to form an inductance component.

[0008]

With this structure, since the green sheet is a thin printed laminate having a four-layer structure, the surface is flat, and pressure and peeling of the base film from the base film are repeated to produce a multilayer laminate. However, even in the case of an inductance component obtained by subsequent firing, the surface thereof is flat and highly accurate with almost no deviation of the printing pattern. In particular, when a hole or the like is provided at a predetermined position in the peripheral portion of the base film and the lamination is repeated while positioning using the hole, it is possible to obtain a higher-precision inductance component having no deviation.

Also, when a module is manufactured by printing a thick film resistor or the like on the above-mentioned multi-layered laminate, the surface of the laminated body is flat so that it can be easily compounded and highly integrated. You can get the module.

[0010]

【Example】

(Embodiment 1) Hereinafter, a first embodiment of the present invention will be described with reference to the drawings.

1 (a) and 1 (b) are a front sectional view and a plan view of a green sheet according to a first embodiment of the present invention. Here, 1 is a base film used as a printing support, 2 and 4 are first and second conductor layers, 3 and 5 are first and second insulator layers, and 6 and 7 are second conductor layers. A terminal electrode and a coil electrode. Further, FIG. 2 shows each printing pattern used at the time of printing. In FIG. 2, (a) and (c) are printing patterns of the first conductor layer and the second conductor layer, and (b) and (d) are printing of the first insulator layer and the second insulator layer. It is a pattern.

Next, the procedure for producing the green sheet in this embodiment will be described. First, a 15 μm-thick first conductor layer 2 was formed on a base film 1 serving as a printing support by a screen printing method using an electrode paste containing silver as a main component by using the printing pattern of FIG. .. next,
Alumina and lead borosilicate glass are 8 parts by weight of butyral resin to 100 parts by weight of glass powder with a weight ratio of 6: 4.
24 parts by weight of butyl carbitol and 4 parts by weight of butyl benzyl phthalate were mixed, and these were kneaded using a triple roll to prepare an insulating paste. This paste first
3 on the base film 1 so as to cover the conductor layer 2 of FIG.
Screen printing the print pattern of (b) to a thickness of 30μ
m of the first insulator layer 3 was formed. Next, an electrode paste similar to that for the first conductor layer 2 is formed on the first insulator layer 3 as shown in FIG.
A second conductor layer 4 having a thickness of 15 μm is formed by screen printing using the print pattern of (c), and a paste similar to that of the first insulator layer 3 is used using the print pattern of FIG. 3 (d). A second insulating layer 5 having a thickness of 30 μm was formed by screen printing. In this way, 1 per sheet
A green sheet having a coil was produced. The first
The electrical connection between the coil-shaped electrodes of both the conductor layer 2 and the second conductor layer 4 of the first conductor is formed when the first insulator layer 3 is printed after forming the first conductor layer 2. The connection is made by printing the second conductor layer 4 leaving the insulator unprinted approximately in the center of the layer 2. In this embodiment, the first conductor layer 2 and the second conductor layer 4 are connected by the print pattern as described above. However, punching or laser perforation is performed to connect these conductor layers by through holes. I don't mind if you go. Further, these insulator layers may have a high electric insulation property, and the electrode material may be a material having a low electric resistance such as silver, silver-palladium, copper or gold.

(Embodiment 2) Next, an inductance component according to a second embodiment of the present invention will be described with reference to the sectional view of the inductance component before firing shown in FIG.

First, on an alumina substrate 8, a glass powder 100 in which alumina and lead borosilicate glass are in a weight ratio of 6: 4.
By weight, 12 parts by weight of butyral resin, 24 parts by weight of butyl carbitol, and 8 parts by weight of butyl benzyl phthalate were mixed, and an adhesive layer 9 was formed by screen printing using a paste obtained by kneading these with a triple roll. Next, the green sheet is heat-transferred onto the adhesive layer 9, that is, the temperature of the mold surface is 150 ° C., the pressure is 120 kg / cm ² , and the pressure is applied from above the base film of the green sheet using a heating press. Heat press under the condition of time 30 seconds,
After that, the base film was peeled off. Next, this was held at 440 ° C. for 30 minutes in the air to remove the binder in the air, and then held at 850 ° C. for 2 hours to be fired to manufacture an inductance component.

The inductance component of this embodiment described above is
Since the conductor layers and the insulator layers are alternately stacked and formed in total of four layers, the conductor layer and the insulator layer are thin and have almost no surface irregularities. Moreover, since the insulator layer and the conductor layer are made of a fired product, the inductance component is excellent in heat resistance. In addition,
In this embodiment, only one green sheet is transferred to the ceramic substrate, but by transferring an arbitrary number of green sheets, the coils can be connected in parallel or in series and the surface has a flat print pattern. A multilayer laminated inductance component having no deviation can be obtained.

[0016]

As is apparent from the above description, the present invention is one green sheet in which a conductor layer and an insulator layer are laminated on a base film, and two conductor layers are connected to each other and a coil is formed by connecting the conductor layers. By using the above-mentioned method, it is transferred onto a ceramic substrate and fired to realize a small and thin inductance component having a flat surface. Furthermore, when the green sheet of the present invention is used, since the surface is flat, deviation of the printed pattern does not easily occur, and it can be easily combined with a thick film resistor or the like to easily realize a highly integrated module. ..

[Brief description of drawings]

FIG. 1A is a front sectional view of a green sheet according to a first embodiment of the present invention, and FIG. 1B is a plan view of the green sheet.

2A is a print pattern diagram of a first conductor layer in the first embodiment of the present invention, FIG. 2B is a print pattern diagram of the same first insulator layer, and FIG. 2C is a second conductor diagram thereof. Print pattern diagram of layer (d) is a print pattern diagram of the same second insulator layer

FIG. 3 is a sectional view of an inductance component according to a second embodiment of the present invention before firing.

[Explanation of symbols]

 1 Base Film 2 1st Conductor Layer 3 1st Insulator Layer 4 2nd Conductor Layer 5 2nd Insulator Layer 6 Terminal Electrode 7 Coiled Electrode 8 Ceramic Substrate 9 Adhesive Layer

Claims (2)

[Claims] 1. A base film, a first conductor layer printed on the base film, a first insulator layer covering the first conductor layer, and a first insulator layer printed on the first insulator layer. A second conductor layer and a second insulator layer covering the second conductor layer, and one end of the electrode of the first conductor layer and one end of the electrode of the second conductor layer are connected to each other. Green sheet for inductance parts that forms a coil. 2. An inductance obtained by placing the green sheet for an inductance component according to claim 1 on a ceramic substrate via an adhesive layer, pressing the base film, peeling off the base film, and further firing. parts.