JPS5820004A - Production of strip line - Google Patents

Abstract

PURPOSE:To reduce the loss of production for a strip line, by providing a center electrode between the other sides of a pair of dielectric substrates containing a full-surface electrodes on a single side respectively and then sticking the other sides to each other with the glass glaze. CONSTITUTION:A center electrode film 13 and a full-surface electrode film 14 are formed on a single side and the other side of the 1st dielectric material 11 respectively by the printing, vapor deposition and the like processes. A full-surface electrode film 15 is formed on a single side of the 2nd dielectric material 12 by the printing, vapor deposition and the like processes. Then the single side of the material 12 is stuck to the single side, i.e. the side containing the film 13 of the material 11 by means of the glass glaze and at about 800 deg.C. In such process, a strip line is produced with a small loss.

Description

DETAILED DESCRIPTION OF THE INVENTION Jin's invention relates to a method of manufacturing a stripline with excellent properties. 1 shows an ordinary strip line 1, in which a center electrode 2 is formed on one main surface of a dielectric substrate 2 made of alumina or beryllia, and an entire surface electrode 3 is formed on the other main surface.

In such a structure, a dielectric substrate 2 is placed above the center electrode 2.
For example, due to the presence of air, which has a different rate from that of , the effective IT becomes as small as the gr noise of the substrate 2, ■ radiation loss occurs, and ■ the mode does not become a complete TBM mode but becomes a quasi-TBM mode. There are drawbacks such as.

Therefore, ■ Increasing the effective permittivity to make the strip line smaller, ■ Eliminating radiation loss, ■ Making it a complete 71M mode, making it unaffected by the outside world, and making the design easier. To achieve this, a strip line has been proposed that has a structure in which a center electrode is present between a pair of conductor substrates, each having a full-surface electrode on one side and the other side.

and ζ, the stripline loss α′ is generally expressed as follows.

a=table d+αc+ar Cξ, ad is the dielectric loss of the dielectric substrate, aC is the loss (copper loss) due to the electrical resistance of the electrode, and ar is the radiation loss. Since -1 of the material used in the embodiments of Zero Origin and Mei is usually on the order of 1 G-', the large h8 of ad that occupies a is generally smaller than aC and af. Further, ar is 0''cS in a structure in which the Gζ center electrode between the dielectric substrates is present as described above. Therefore, reducing the copper loss as much as possible leads to reducing the strip line loss ξ.

It is therefore an object of the invention to provide a stripline with reduced losses.

The gist of this invention is to provide a pair of dielectric substrates with a full-surface electrode made of a low-resistance material such as silver on one side, and to create a coupling pole made of a low-resistance material such as silver between the other surfaces. The process involves flipping it over and pasting the other sides together with glass glaze.

Other objects and features of the invention will become apparent from the following examples.

Figure 2 is obtained in one embodiment of this invention, and 1
1 is high Q in high frequency range such as when using strip line.
and materials with high drs (y: e.g. 5r=20 to 100), such as MgTi03-CaTiO series ZrO, -
8nO, -TiO2 system, BaTi40. system, Nd, Ti
, O, -(BaPb)Tie, -Tie2-based dielectric material A first dielectric material 12 is a second dielectric material similar to the first dielectric material 11, and 13 is a silver-based dielectric material. The center electrode is the main component and is present between the first and second dielectrics. Reference numerals 14 and 15 denote full-surface electrodes mainly composed of chains, which are present on the surfaces of the eleventh and second dielectrics so as to pair with the center electrode 13 via the eleventh and second dielectrics.

Next, the manufacturing method will be explained with reference to FIG.

The center electrode film 13 is formed on one side of the first dielectric 11 by a method such as printing or vapor deposition using the above-mentioned material.

A full-surface electrode film 14 is printed on the other side of the first dielectric 11,
Formed by a method such as vapor deposition. ! A full-surface electrode film 15 is formed on one side of the dielectric 12 of No. 2 by a method such as printing or vapor deposition.

The other surface of the second dielectric 12 and one surface of the first dielectric 11, that is, the surface on which the center electrode film 13 is provided, are bonded together using glass glaze at a temperature of about 800.degree. A plurality of center electrodes 1113 may be provided as shown in FIG.
1. The structure shown in FIGS. 2-3 and 4 may be constructed by stacking a plurality of layers as shown in FIG. 5, for example.

As is clear from the above embodiments, according to the present invention, a center electrode is present between a pair of dielectric substrates each having a full-surface electrode on one side, and the other surfaces are bonded together with a glass glaze. In a structure without radiation loss, electrodes with low copper loss, such as silver, can be used, and the characteristics can be further improved.

Because of these effects, the present invention is a useful invention that can be applied to branchers and filters, for example.

[Brief explanation of drawings]

FIG. 1 is a side view of a conventional example, FIG. 2 is a side view of an embodiment of the present invention, FIG. 3 is an exploded perspective view of the same, and FIG. 4 is an exploded perspective view of the same.
FIG. 5 is a side view of the modified example. 11 is the first dielectric, 12 is the second dielectric, 13 is the center electrode, and 14.15 is the entire surface electrode. Patent applicant Murata Manufacturing Co., Ltd. / IB Gezm 4 / 4 h44-m 5 Kaya 5m

Claims (1)

[Claims] A method for manufacturing a strip line, characterized by a pair of dielectric substrates having a full-surface electrode on one side, a center electrode between the other surfaces, and ξ, the other surfaces of which are pasted together with a glass glaze.