JPH10135534A - Piezoelectric ceramic transformer and method of manufacturing the same - Google Patents

Abstract

(57) Abstract: it can be simultaneously high values coupling coefficient k _31, the longitudinal effect of the coupling coefficient K ₃₃ of the transverse effect of the laminated piezoelectric ceramic transformer, to improve boost ratio and maximum efficiency at the same time It is an object of the present invention to provide a piezoelectric ceramic transformer capable of performing the above. The present invention relates to a piezoelectric ceramic transformer. A rectangular plate-shaped horizontal effect piezoelectric ceramic portion and a rectangular plate-shaped vertical effect piezoelectric ceramic portion are formed in respective longitudinal directions. Each of the horizontal effect piezoelectric ceramic portion and the vertical effect piezoelectric ceramic portion has a laminated structure.
The input electrode 2 is provided in the horizontal effect piezoelectric ceramic portion, and the output electrode 4 is provided in the vertical effect piezoelectric ceramic portion. The input-side electrode 2 forms an internal electrode between the laminated structures, and has a thick film portion 2 a at a position closest to the output-side electrode 4.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a piezoelectric ceramic transformer suitable for application to, for example, a high-voltage power supply for electronic equipment and the like, and a method for manufacturing the same.

[0002]

2. Description of the Related Art Piezoelectric ceramic transformers are non-winding type transformers and have been widely used as a method for obtaining a high voltage power supply.

The structure of a conventional Rosen-type piezoelectric ceramic transformer is as shown in FIG. Here, the step-up ratio at the output end unloaded (V ₂ / V ₁₎ is represented by the formula. _{V 2 / V 1 = 4 ×} Qm × K 31 × K 33 × L / (π 2 × T) where, V _1: Input Voltage V _2: Output Voltage Qm: the mechanical quality factor K _31: Binding of transverse effect Coefficient K ₃₃ : Coupling coefficient of longitudinal effect L: Length of piezoelectric ceramic element T: Thickness of piezoelectric ceramic element

[0004] The maximum efficiency is expressed by the following equation. Maximum efficiency = 1 / (1 + π ² / (2 × Qm ×
(K ₃₃₎ ²⁾⁾

Therefore, in order to obtain a high boost ratio and a high maximum efficiency, the coupling coefficient K _{31 for} the horizontal effect and the coupling coefficient K for the vertical effect are required.
₃₃ , and the mechanical quality factor Qm.

The input side electrode 2 of the piezoelectric ceramic transformer shown in FIG. 6 has a structure in which internal electrodes are laminated. Ag-Pd electrodes are mainly used as internal electrodes. Since the internal electrodes do not contribute to the piezoelectric effect, the coupling coefficient K ₃₁ of transverse effect is lowered when the thickness of the internal electrode is increased, the step-up ratio of the piezoelectric ceramic transformer is reduced as a result.

Therefore, in this case, it is desirable that the thickness of the internal electrode be small. However, when the thickness of the internal electrode becomes thinner, the coupling coefficient K ₃₃ of longitudinal effect is lowered, there are mainly a problem in that the maximum efficiency of the piezoelectric ceramic transformer is deteriorated.

[0008] coupling coefficient K ₃₃ of the thickness thicker longitudinal effect of the internal electrodes increases, because the coupling coefficient K ₃₁ of transverse effect is reduced, but the maximum efficiency is good, there is a problem that the step-up ratio decreases .

[0009] coupling coefficient K ₃₁ of transverse effect when the thickness of the internal electrode becomes thick to decrease is the volume of the piezoelectric inactive internal electrodes in the piezoelectric element is increased. Further, the coupling coefficient K ₃₃ of longitudinal effect when the thickness of the internal electrode becomes thinner decreases is because the nonuniformity of the polarization of the output portion near the center and thinner thickness of the internal electrode becomes large.

The present invention has been made in view of such a problem, and it is possible to simultaneously increase the coupling coefficient k _{31 of} the transverse effect and the coupling coefficient K ₃₃ of the longitudinal effect of a laminated piezoelectric ceramic transformer. It is an object of the present invention to provide a piezoelectric ceramic transformer capable of simultaneously improving the boost ratio and the maximum efficiency, and a method of manufacturing the same.

[0011]

A piezoelectric ceramic transformer according to the present invention comprises a rectangular plate-shaped piezoelectric ceramic body having a horizontal effect piezoelectric ceramic portion and a vertical effect piezoelectric ceramic portion, and an input side connected to the horizontal effect piezoelectric ceramic portion. In the piezoelectric ceramic transformer in which the electrodes are provided, and the output side electrode is provided in the vertical effect piezoelectric ceramic portion, the horizontal effect piezoelectric ceramic portion and the vertical effect piezoelectric ceramic portion have a laminated structure, and the input side electrode has an internal electrode between the laminated structures. And has a thick film portion at a position closest to the output side electrode provided on the end face of the vertical effect piezoelectric ceramic portion.

Further, according to the method of manufacturing a piezoelectric ceramic transformer of the present invention, an input-side electrode is printed in a predetermined shape on an upper flat portion of a plurality of rectangular plate-shaped ceramic green sheets. A step of increasing the thickness at the position closest to the side to provide a thick film portion, a step of laminating ceramic green sheets, and thermocompression bonding to integrate them, and sintering the integrated body to produce a piezoelectric ceramic fired body And a step of baking an output-side electrode on the side of the piezoelectric ceramic fired body that is perpendicular to the longitudinal direction and that is opposite to the input-side electrode.

In the piezoelectric ceramic transformer according to the present invention, a horizontal effect piezoelectric ceramic portion and a vertical effect piezoelectric ceramic portion are formed in a rectangular plate-shaped piezoelectric ceramic body, and an input electrode is provided in the horizontal effect piezoelectric ceramic portion. In a piezoelectric ceramic transformer in which first and second output electrodes are provided in a vertical effect piezoelectric ceramic portion, the number of first output electrodes is greater than the number of input electrodes, and the horizontal effect piezoelectric ceramic portion and the vertical effect piezoelectric The ceramic portion has a laminated structure, the input electrode forms an internal electrode between the laminated structures of the lateral effect piezoelectric ceramic portion, and the first output electrode forms an internal electrode between the laminated structures of the vertical effect piezoelectric ceramic portion. The electrode is formed near the input side electrode, and the second output side electrode is provided on the end face of the vertical effect piezoelectric ceramic portion.

The method of manufacturing a piezoelectric ceramic transformer according to the present invention further comprises a step of printing an output-side electrode on a half of the upper flat portion of some of the plurality of rectangular green ceramic sheets; A step of printing an input-side electrode in a half of the upper flat portion of another ceramic green sheet and a first output-side electrode in a predetermined shape near the center of the green sheet; Laminating a ceramic green sheet on which an input-side electrode and a first output-side electrode are formed, thermocompression bonding and integrating, and sintering the integrated body to obtain a piezoelectric ceramic fired body; Baking a second output-side electrode on a side of the piezoelectric ceramic fired body that is perpendicular to the longitudinal direction and that is opposite to the input-side electrode.

According to the piezoelectric ceramic transformer of the present invention, the thickness of the input side electrode is increased on the output side, so that the coupling coefficient k _{31 for} the horizontal effect and the coupling coefficient K for the vertical effect are increased.
_{No. 33} shows a high value at the same time, whereby the step-up ratio and the maximum efficiency of the laminated piezoelectric ceramic transformer can be simultaneously improved.

Further, according to the piezoelectric ceramic transformer of the present invention, the piezoelectric ceramic transformer has a structure in which an input electrode and a band-shaped output electrode are laminated, and the input electrodes are printed every other layer to form a band. Since the output-side electrode is printed on all layers, the coupling coefficient k _{31 for} the horizontal effect and the coupling coefficient K _{33 for the} vertical effect show high values at the same time.
The step-up ratio and the maximum efficiency of the laminated piezoelectric ceramic transformer can be simultaneously improved.

[0017]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the piezoelectric ceramic transformer of the present invention and a method of manufacturing the same will be described. First, a first embodiment will be described with reference to FIGS.

FIG. 1 is a structural view (cross section) of a laminated piezoelectric ceramic transformer according to the present invention. The dimensions of the piezoelectric ceramic transformer 1 are 25 mm in length, 6 mm in width, and 1 mm in thickness. The thickness of the piezoelectric ceramic layer of the input section is 0.2 mm, and this is a piezoelectric ceramic transformer in which these are laminated in five layers.

As shown in FIG. 1, the thickness of the input side electrode 2 is increased on the output side (approximately the center in the longitudinal direction of the piezoelectric ceramic transformer 1) (thick film portion 2a).

A method for manufacturing a piezoelectric ceramic transformer having such a structure will be described with reference to FIG.

First, ceramic raw materials such as PbO (lead oxide), ZrO ₂ (zirconium dioxide), TiO ₂ (titanium dioxide), NiO (nickel oxide), ZnO (zinc oxide), and Nb ₂ O ₅ (niobium pentoxide) , Bi ₂ O
₃ (bismuth trioxide), MnO ₂ (manganese dioxide)
Were mixed in a predetermined ratio, by mixing for 15 hours in a ball mill, for example, PbTiO ₃ -PbZrO ₃ -Pb
(Ni _1/3 Nb _2/3 ) O ₃ -Pb (Zn _1/3 Nb _2/3 )
It is prepared so as to obtain O ₃ —Bi _2/3 TiO ₃ —MnO ₂ .

Next, the powder thus obtained is pressed and calcined at 900 ° C. for 2 hours. Thus, based on 100 parts by weight of the calcined powder obtained by calcining, 5 parts by weight of an organic binder composed of polyvinyl butyral, 10 parts by weight of an organic solvent composed of ethyl alcohol, and a plasticizer 1 composed of dibutyl phthalate (DBP) The parts by weight are mixed and mixed in a ball mill for 15 hours to obtain a slurry for tape molding.

Next, the slurry for tape forming is poured into a hopper provided on a belt by a doctor blade method known as a tape casting method. The belt is surrounded by a driving pulley and a driven pulley, and the belt between the two pulleys moves endlessly.

The slurry poured into the popper is formed into a sheet having a predetermined thickness by a doctor blade, and the solvent is evaporated in a drying furnace such as an infrared ray disposed on the way of moving the belt over the belt, and the ceramic green sheet having a thickness of 250 μm is formed. Get. The ceramic green sheet is peeled from the belt by a roller to obtain a tape-shaped continuous ceramic green sheet.

Next, a ceramic green sheet in the form of a tape was punched out and had a length of 31.3 mm as shown in FIG. 2A.
Five rectangular green ceramic sheets 5a, 5b, 5c, 5d, and 5e each having a width of 7.5 mm and a thickness of 250 μm are obtained.

Next, as shown in FIG. 2A, the ceramic green sheets 5a, 5b, 5c, 5
d, 5e out of the ceramic green sheets 5b, 5c,
The input electrode 2 is printed in a predetermined shape on the upper flat portions of 5d and 5e. Further, as shown in FIG. 2A, the input side electrode 2
The thickness of the internal electrode is increased on the output side (approximately at the center in the longitudinal direction of the ceramic green sheet) to increase the thickness of the thick film portion 2.
b was provided.

When printing the input electrode 2 on the green sheet, the thick film portion 2b was printed with a printing pattern (mesh) at a position corresponding to the thick film portion 2b coarser than a normal portion. The method of forming the thick film portion 2b is not limited to the above-described method, and may be performed by another method such as performing printing a plurality of times. Note that an Ag-Pd paste or the like is used as the input electrode 2.

Next, a ceramic green sheet 5a,
Ceramic green sheet 5 on which input electrode 2 is formed
b, 5c, 5d and 5e are laminated.

Next, the laminated ceramic green sheets 5a, 5b, 5c, 5d and 5e are integrated by thermocompression bonding using a mold.

Next, this integrated product is sintered at 1200 ° C. for 3 hours to obtain a piezoelectric ceramic fired body as shown in FIG. 2B. In this firing step, the green sheet 5
Since a, 5b, 5c, 5d, and 5e shrink by firing, the piezoelectric ceramic fired body has a length of 25 mm and a width of 6 m.
m and a thickness of 1 mm (the thickness is the total value of the thickness of the piezoelectric ceramic layer of the input portion, and the piezoelectric ceramic layer of the input portion has a thickness of 200 μm per sheet). I have. In FIG. 2B, the right side of the longitudinal half of the piezoelectric ceramic fired body continuous with the piezoelectric ceramic layer of the input portion is represented as one sheet, but actually, five ceramic green sheets 5a, 5a,
b, 5c, 5d and 5e are fired.

Next, the output side electrode 4 is burned with Ag or the like on the front side of the side surface perpendicular to the longitudinal direction of the piezoelectric ceramic transformer 1.

Next, in order to polarize the output side, a DC voltage of 25 KV / cm is applied between the input side electrode 2 and the output side electrode 4 at 100 ° C. for one hour. Thereby, it is polarized in the longitudinal direction of the piezoelectric ceramic transformer. That is, a rectangular effect piezoelectric ceramic transformer having a rectangular plate shape is obtained.

Further, in order to polarize the input side, a DC voltage of 25 KV / cm is applied between adjacent input side electrodes at 100 ° C.
For 1 hour. As a result, adjacent piezoelectric ceramic elements are polarized in opposite directions. That is, the laminated rectangular plate-shaped transverse effect piezoelectric ceramic transformer is obtained. Thus, a laminated piezoelectric ceramic transformer 1 as shown in FIG. 1 is obtained.

The thickness of the thick-film portion 2a is larger than the thickness of the input-side electrode 2 other than the thick-film portion 2a, and is smaller than 1/3 of the thickness of the piezoelectric ceramic layers 6a to 6e in the input portion. Is desirable. Can not be the thickness of the thick portion 2b improve the coupling coefficient K ₃₃ of a thin and longitudinal effect than the thickness of the input electrode 2 except the thick portion 2a. Further, when the thickness of the thick film portion 2a is larger than 1/3 of the thickness of the piezoelectric ceramic layers 6a to 6e of the input portion, the mechanical strength of the piezoelectric ceramic transformer 1 decreases and the coupling of the lateral effect on the input side. resulting disadvantageously factor K ₃₁ is lowered.

As described above, according to the present embodiment, as shown in FIG. 1, the thickness of the input electrode 2 is increased on the output side (substantially at the center of the piezoelectric ceramic transformer 1). The coupling coefficient k _{31 of} the transverse effect and the coupling coefficient K ₃₃ of the longitudinal effect of the laminated piezoelectric ceramic transformer simultaneously showed high values. As a result, the step-up ratio and the maximum efficiency of the laminated piezoelectric ceramic transformer can be simultaneously improved.

Next, a second embodiment will be described with reference to FIGS.

FIG. 3 is a structural view (cross section) of another laminated piezoelectric ceramic transformer according to the present invention.
The shape and dimensions of the piezoelectric ceramic transformer 1 are 25 m in length.
m, width 6 mm, thickness 1 mm. The thickness of the piezoelectric ceramic layer of the input section is 0.1 mm, and this is a piezoelectric ceramic transformer in which 10 layers are laminated.

As shown in FIG. 3, the piezoelectric ceramic transformer of this embodiment has a structure in which an input electrode 2 and a strip-shaped output electrode 3 are laminated. The input-side electrodes 2 are printed every other layer, and the strip electrodes of the output section are printed on all layers.

A method of manufacturing a piezoelectric ceramic transformer having such a structure will be described with reference to FIG.

Here, the steps from the preparation of the ceramic raw materials to the formation of the ceramic green sheets are the same as in the first embodiment.

A tape-shaped ceramic green sheet was punched out and, as shown in FIG. 4A, a length of 31.3 mm and a width of 7.13 mm.
10 rectangular ceramic green sheets 5a to 5j each having a thickness of 5 mm and a thickness of 125 μm are obtained.

Next, as shown in FIG. 4A, of the ceramic green sheets 5a to 5j formed in a predetermined shape, the output side electrode 3 is provided on the upper flat surface of the ceramic green sheets 5b, 5d, 5f, 5h, 5j. Print in the shape of

The ceramic green sheets 5c, 5c
e, 5g, 5i, the input side electrode 2
And the output side electrode 3 is printed in a predetermined shape. In this case, the thickness of the input electrode 2 and the thickness of the output electrode 3 were the same.

When the thickness of the output side electrode 3 is made larger than the thickness of the input side electrode, a printing pattern (mesh) at a position corresponding to the output side electrode 3 is printed when printing on a green sheet. Printed more coarsely. The method of forming the output-side electrode 3 is not limited to the above-described method, and may be performed by another method such as performing printing a plurality of times.

On the other hand, when the thickness of the output side electrode 3 is made smaller than the thickness of the input side electrode, a printing pattern (mesh) at a position corresponding to the output side electrode 3 is input when printing on a green sheet. Printing was made finer than the side electrodes 2.

Next, as shown in FIG. 4A, a ceramic green sheet 5a and ceramic green sheets 5b, 5d, 5f, 5h, 5j on which only the output electrodes 3 are formed.
And the ceramic green sheets 5c, 5e, 5g, and 5i on which the input side electrode 2 and the output eye electrode 3 are formed.

Next, the laminated ceramic green sheets 5a to 5j are integrated by thermocompression bonding using a mold.

Next, this integrated product is sintered at 1200 ° C. for 3 hours to obtain a piezoelectric ceramic fired body as shown in FIG. 4B. In this firing step, the green sheet 5
Since a to j shrink by firing, the piezoelectric ceramic fired body has a length of 25 mm, a width of 6 mm, and a thickness of 1 mm (the thickness is the total value of the thickness of the piezoelectric ceramic layer of the input portion, 100 μm per ceramic layer
Thickness. ) Has a rectangular plate shape.

In FIG. 4B, the right half of the piezoelectric ceramic transformer in the longitudinal direction is represented by one sheet, and the left side is represented by five sheets. Actually, ten ceramic green sheets are provided. 5a-j
Is fired.

Next, the output side electrode 4 is burned with Ag or the like on the front side of the piezoelectric ceramic transformer 1 which is perpendicular to the longitudinal direction.

Next, in order to polarize the output side, a DC voltage of 25 KV / cm is applied between the output side electrode 3 and the output side electrode 4 at 100 ° C. for one hour. Thereby, it is polarized in the longitudinal direction of the piezoelectric ceramic element. That is, a rectangular effect piezoelectric ceramic transformer having a rectangular plate shape is obtained.

Further, the input side is polarized. The polarization method is the same as in the first embodiment. Thus, the laminated piezoelectric ceramic transformer 1 as shown in FIG. 3 is obtained.

FIG. 7 shows the relationship between the coupling coefficient K _{31 of} the transverse effect, the coupling coefficient K ₃₃ of the longitudinal effect, and the thickness of the input-side electrode in the conventional piezoelectric ceramic transformer (see FIG. 6).

FIG. 5 shows how the coupling coefficient K _{31 of} the horizontal effect and the coupling coefficient K ₃₃ of the longitudinal effect change when the input side electrode has four layers and the output side electrode has nine layers in the second embodiment. It is a thing. Curve shown in Figure 5, which shows the relationship of a conventional piezoelectric ceramic transformer coupling of lateral effect (see FIG. 6) the coefficient K ₃₁ and longitudinal effect of the coupling coefficient K _33, the point indicated in the upper right of the curve there is up shows the coupling coefficient K ₃₃ of the coupling coefficient K ₃₁ and longitudinal effect of the transverse effect in example 2. As is clear from the figure, the coupling coefficient K _{31 of} the horizontal effect and the coupling coefficient K _{33 of the} vertical effect are obtained by the laminated piezoelectric ceramic transformer having this structure.
Can be increased at the same time, and the boost ratio and the maximum efficiency can be simultaneously improved.

In the second embodiment, the case where one piezoelectric ceramic layer provided with only the output electrode is provided between the piezoelectric ceramic layers provided with the input electrode and the output electrode has been described. The present invention is not limited to this example, and two or more piezoelectric ceramic layers provided with only the output electrodes can be formed between the piezoelectric ceramic layers provided with the input electrodes and the output electrodes.

When the total value of the thickness of the input electrode 2 is m and the total value of the thickness of the output electrode 3 is n, the thickness of one output electrode 3 is The ratio m / to the total value m of the number of electrodes and the total value n of the number of first output electrodes
It is preferable that the thickness is larger than a value obtained by multiplying n by the thickness of one input electrode, and smaller than 1/3 of the thickness of the piezoelectric ceramic layers 6a to 6j of the input portion. The thickness of the output electrode 3 is equal to the input electrode 2
It can not be a thinner than the thickness of the m / n improve the coupling coefficient K ₃₃ of longitudinal effect. Further, when the thickness of the output side electrode 3 is larger than 1/3 of the thickness of the piezoelectric ceramic layers 6a to 6j of the input portion, the mechanical strength of the piezoelectric ceramic transformer 1 is reduced and the coupling of the input side transverse effect is achieved. resulting disadvantageously factor K ₃₁ is lowered.

From the above, according to the present embodiment, as shown in FIG. 3, the piezoelectric ceramic transformer has a structure in which the input electrode 2 and the strip-shaped output electrode 3 are laminated, and the input electrode 2 is The output electrodes 3 which are printed every other layer and have a band shape
Are printed on all the layers, so that the coupling coefficient k _{31 of} the transverse effect and the coupling coefficient K ₃₃ of the longitudinal effect of the laminated piezoelectric ceramic transformer simultaneously show high values. As a result, the step-up ratio and the maximum efficiency of the laminated piezoelectric ceramic transformer can be simultaneously improved. In the first embodiment described above, the thick-film portion 2a is formed in four layers over the entire piezoelectric ceramic transformer 1, but in the second embodiment, the output-side electrodes 3 are formed in nine layers dispersed throughout the piezoelectric ceramic transformer 1. Therefore, the mechanical strength of the piezoelectric ceramic transformer 1 can be improved as compared with the first embodiment.

It should be noted that the present invention is not limited to the above-described embodiment, but can adopt various other configurations without departing from the gist of the present invention.

[0059]

As described above, according to the present invention,
The thickness of the input electrode 2 is increased on the output side (approximately at the center of the piezoelectric ceramic transformer 1), so that the coupling coefficient k _{31 of} the transverse effect and the coupling of the longitudinal effect of the laminated piezoelectric ceramic transformer are obtained. coefficient K ₃₃ showed a high value at the same time.
As a result, the step-up ratio and the maximum efficiency of the laminated piezoelectric ceramic transformer can be simultaneously improved.

Further, according to the present invention, the piezoelectric ceramic transformer has a structure in which the input side electrode 2 and the band-shaped output side electrode 3 are laminated, and the input side electrode 2 is printed every other layer, and the band-shaped output side is formed. Since the side electrodes 3 are printed on all the layers, the coupling coefficient k _{31 of} the transverse effect and the coupling coefficient K ₃₃ of the longitudinal effect of the laminated piezoelectric ceramic transformer simultaneously show high values. As a result, the step-up ratio and the maximum efficiency of the laminated piezoelectric ceramic transformer can be simultaneously improved.

Further, according to the present invention, since the output-side electrodes 3 are formed in nine layers dispersed throughout the piezoelectric ceramic transformer 1, the mechanical strength of the piezoelectric ceramic transformer 1 can be improved.

[Brief description of the drawings]

FIG. 1 is a sectional view showing Embodiment 1 of a piezoelectric ceramic transformer according to the present invention.

FIG. 2 is a perspective view illustrating a method for manufacturing the piezoelectric ceramic transformer according to the first embodiment.

FIG. 3 is a sectional view showing Embodiment 2 of the piezoelectric ceramic transformer of the present invention.

FIG. 4 is a perspective view illustrating a method for manufacturing a piezoelectric ceramic transformer of Example 2.

[5] in a conventional example and the embodiment 2 is a diagram showing the relationship between the coupling coefficient K ₃₃ of the coupling coefficient K ₃₁ and longitudinal effect of transverse effect.

FIG. 6 is a sectional view showing an example of a conventional piezoelectric ceramic transformer.

FIG. 7 is a diagram showing the relationship between the coupling coefficient K _{31 of} the horizontal effect or the coupling coefficient K _{33 of the} vertical effect and the thickness of the input electrode in the conventional example.

[Explanation of symbols]

1 piezoelectric ceramic transformer, 2 input side electrodes, 2a
Thick film part, 3,4 Output side electrode, 5a-j Ceramic green sheet, 6a-j Piezoelectric ceramic layer of input part

Claims (21)

[Claims] A horizontal effect piezoelectric ceramic portion and a vertical effect piezoelectric ceramic portion are formed on a rectangular plate-shaped piezoelectric ceramic body, an input electrode is provided on the horizontal effect piezoelectric ceramic portion, and the vertical effect piezoelectric ceramic portion is provided on the rectangular effect piezoelectric ceramic portion. A piezoelectric ceramic transformer provided with an output-side electrode, wherein the input-side electrode has a thick film portion. 2. The piezoelectric ceramic transformer according to claim 1, wherein the input side electrode has a thick film portion at a position closest to the output side electrode. 3. The piezoelectric ceramic transformer according to claim 1, wherein the input side electrode has a thick film portion at a position closest to the output side electrode provided on the end face of the vertical effect piezoelectric ceramic portion. 4. The horizontal effect piezoelectric ceramic portion and the vertical effect piezoelectric ceramic portion have a laminated structure, and the input side electrode has a thick film portion closest to the output side electrode provided on the end face of the vertical effect piezoelectric ceramic portion. The piezoelectric ceramic transformer according to claim 1, comprising: 5. The horizontal effect piezoelectric ceramic part and the vertical effect piezoelectric ceramic part have a laminated structure, the input electrode forms an internal electrode between the laminated structures, and the input electrode is formed of the vertical effect piezoelectric ceramic part. 2. The piezoelectric ceramic transformer according to claim 1, wherein a thick film portion is provided at a position closest to the output electrode provided on the end face. 6. The piezoelectric ceramic transformer according to claim 1, wherein the thick film portion has a band shape. 7. The thick film portion has a band-like shape, and the thickness of the thick film portion is larger than the thickness of the input-side electrode other than the thick film portion and the thickness of the piezoelectric ceramic layer of the input portion. 1/3
2. The battery according to claim 1, wherein
The piezoelectric ceramic transformer according to 2, 3, 4, or 5. 8. An input-side electrode is printed in a predetermined shape on the upper flat portion of a plurality of rectangular plate-shaped ceramic green sheets, and the thickness of the input-side electrode closest to the output side is increased. Forming a thick film portion by laminating, laminating the ceramic green sheets, thermocompression bonding and integrating them, sintering the integrated product to obtain a piezoelectric ceramic fired body, Baking an output-side electrode on a side surface of the side surface perpendicular to the longitudinal direction opposite to the input-side electrode. 9. The method according to claim 8, wherein the thick film portion has a band shape. 10. The thick film portion has a band-like shape, and the thickness of the thick film portion is larger than the thickness of the input-side electrode other than the thick film portion, and the thickness of the piezoelectric ceramic layer of the input portion. 1/3
9. The method according to claim 8, wherein the piezoelectric ceramic transformer is formed to be thinner. 11. A horizontal effect piezoelectric ceramic portion and a vertical effect piezoelectric ceramic portion are formed on a rectangular plate-shaped piezoelectric ceramic body, an input electrode is provided on the horizontal effect piezoelectric ceramic portion, and the vertical effect piezoelectric ceramic portion is provided on the rectangular effect piezoelectric ceramic portion. A piezoelectric ceramic transformer provided with first and second output-side electrodes, wherein the number of the first output-side electrodes is larger than the number of input-side electrodes. 12. The piezoelectric ceramic transformer according to claim 11, wherein the first output electrode is an internal electrode provided inside the vertical effect piezoelectric ceramic portion. 13. The vertical output piezoelectric ceramic portion, wherein the first output side electrode is an internal electrode provided inside the vertical effect piezoelectric ceramic portion, and the second output side electrode is provided on an end face of the vertical effect piezoelectric ceramic portion. The piezoelectric ceramic transformer according to claim 11, wherein 14. The first output-side electrode is an internal electrode provided inside the vertical effect piezoelectric ceramic portion, the first output-side electrode is formed near the input-side electrode, and the second output-side electrode The piezoelectric ceramic transformer according to claim 11, wherein the electrode is provided on an end face of the vertical effect piezoelectric ceramic portion. 15. The horizontal effect piezoelectric ceramic portion and the vertical effect piezoelectric ceramic portion have a laminated structure, and the first output side electrode has an internal electrode between the laminated structure of the vertical effect piezoelectric ceramic portion and the input side electrode. 12. The piezoelectric ceramic transformer according to claim 11, wherein the second output side electrode is formed near the end face of the vertical effect piezoelectric ceramic portion. 16. The lateral effect piezoelectric ceramic portion and the longitudinal effect piezoelectric ceramic portion have a laminated structure, the input electrode forms an internal electrode between the laminated structure of the lateral effect piezoelectric ceramic portion, and a first output side. The electrode is characterized in that an internal electrode is formed in the vicinity of the input side electrode between the laminated structures of the vertical effect piezoelectric ceramic portion, and the second output side electrode is provided on an end face of the vertical effect piezoelectric ceramic portion. The piezoelectric ceramic transformer according to claim 11. 17. The device according to claim 11, wherein the first output electrode has a band shape.
17. The piezoelectric ceramic transformer according to 14, 15, or 16. 18. The first output-side electrode has a strip shape, and the thickness of the first output-side electrode is a sum of the total number m of the input-side electrodes and the total number m of the first output-side electrodes. It is characterized in that it is formed to be thicker than a value obtained by multiplying the ratio m / n to the value n by the thickness of one input electrode, and to be thinner than one third of the thickness of the piezoelectric ceramic layer of the input portion. Claims 11, 12, 13, 14,
17. The piezoelectric ceramic transformer according to 15 or 16. 19. A step of printing an output-side electrode on a half of an upper flat portion of some ceramic green sheets among a plurality of rectangular plate-shaped ceramic green sheets; A step of printing an input electrode in half and a first output electrode in a predetermined shape near the center of the green sheet; a ceramic green sheet on which the output electrode is formed; the input electrode and the first output; A step of laminating ceramic green sheets on which side electrodes are formed, and thermocompression bonding to integrate them; a step of sintering the integrated products to obtain a piezoelectric ceramic fired body; Baking a second output-side electrode on a side surface of the right-angled side surface opposite to the input-side electrode. Law. 20. The method according to claim 19, wherein the first output electrode has a band shape. 21. The first output-side electrode has a strip shape, and the thickness of the first output-side electrode is a sum of the total number m of the input-side electrodes and the total number m of the first output-side electrodes. It is characterized by being formed to be thicker than a value obtained by multiplying the ratio m / n to the value n by the thickness of one input-side electrode, and to be thinner than 1/3 of the thickness of the piezoelectric ceramic layer of the input portion. A method for manufacturing a piezoelectric ceramic transformer according to claim 19.