JPS6286802A - Leaded ceramic element - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a ceramic body with lead wires, in which lead wires are attached to a ceramic body provided with a conductive layer on its surface.

[Prior art] A planar heating element in which a conductive layer made of heat-resistant metal such as platinum, tungsten, or molybdenum is coated on the surface of an electrically insulating ceramic plate such as alumina, or a solid electrolyte plate such as zirconia or titania coated with platinum on both sides. Ceramic bodies such as ion batteries, sensors or pump elements that have a porous catalytic metal layer deposited on them, piezoelectric elements that have conductive layers deposited on both sides of a plate-shaped piezoelectric ceramic plate, etc., usually have a conductive layer at the end of the lead wire. is fixed.

This ceramic body with lead wires is made by molding a ceramic green sheet, which is an unsintered ceramic body, into a predetermined shape.
It is mass-produced by applying a conductive layer made of metal paste to its surface by a method such as printing, laminating and crimping conductive wires such as platinum on the ends of the conductive layer, and sintering them into one piece.

[Problems to be Solved by the Invention] In this ceramic body with lead wires, the inventor has solved the following problems:
As shown in FIG. 5, when the lead wires are laminated and crimped, the ceramic green sheet 101 is recessed in the shape of the lead wires 102 and 103, and at this time, the adhered layer has the lead wires 102.
It has been found that cracks 104 and 105 are formed surrounding 103, increasing the probability that a conductive defective product will be produced.

An object of the present invention is to provide a ceramic sintered body with a lead wire that can reliably prevent the occurrence of conductive defects.

[Means for Solving the Problems] In order to achieve the above object, the ceramic body with lead wires of the present invention has a conductive layer and a lead wire connection layer applied to the surface of the unsintered ceramic body, and A through hole provided in the ceramic body is filled with a conductive material to connect the conductive layer and a lead wire connection layer, a lead wire is crimped to the lead wire connection layer including the through hole, and then sintered and integrated. The configuration was adopted.

[Function] In the ceramic body with a lead wire of the present invention, even if a crack occurs in the conductive layer when the lead wire is crimped, the electrical connection of the conductive layer is ensured through the conductor filled in the through hole, so there is no disconnection. Definitely prevented.

[Example] FIG. 1 shows a planar heating element which is an example of the ceramic body with lead wires of the present invention. The planar heating element 1 includes an electrically insulating ceramic plate 2 mainly made of alumina, a conductive layer 3 mainly made of platinum screen-printed in a predetermined pattern on the front surface 21, and a conductive layer 3 mainly made of platinum on the back surface 22 of the ceramic plate 2. A pair of lead wire connection layers 41. which are mainly made of platinum are formed by screen printing corresponding to both ends 31.32 of layer 3.
42, through holes 23 and 24 formed in the ceramic body 2 to connect both ends 31 and 32 of the conductive layer 3 and the lead wire connection layers 41 and 42;
24 filled with conductive material 25, 26, lead wire connection layers 41 and 42 including the through holes 23 and 24, respectively.
The platinum lead wire 5 is crimped and baked into a single piece.
and 6.

Next, a method of manufacturing this ceramic body with lead wires will be explained based on an embodiment shown in FIG.

(a) Main component is Al2O2 (90% or more), M(1
Paste (2) is produced by adding an organic binder such as BMS or DBP and a solvent such as MEK or toluene to a formulation to which 03%, 5iCh2%, CaO1%, etc. are added to form a paste.

(b) Apply the paste ■ using the doctor blade method as shown in Figure 2A.
A rectangular ceramic green sheet 10 shown in FIG. (Dimensions: 1135mm, length of 4h+m, usually 8 (pieces) of single ceramic pieces, thickness: 0.8mm) (c)
As shown in FIG. 2B, through-holes 10^ and 10B with a diameter of 0.7n+m are made at the end of each ceramic single piece in the ceramic green sheet obtained in steps (a) and (b) above. Or install two with a drill.

(d) Platinum powder is blended in a ratio of 2 parts pt black (platinum black) to 1 part platinum sponge, and this is used to produce butyl carpitol.

(B) As shown in FIG. 2C, a conductive layer 30 is formed on the surface of the ceramic green sheet in a predetermined pattern with the through holes at both ends by screen printing the paste (2).

The through hole 10A/1 is formed on the back side of the ceramic green sheet.
Print lead wire connection layer products including 0B and 3B.

(f) As shown in the second diagram, fill the through hole with paste (3). This filling can be accomplished by press-fitting the paste H from one end as shown in the figure, or by dropping it onto one end and suctioning it from the other end, which is excellent in productivity.

(G) Platinum lead wire 5 is placed over the through hole as shown in Figure 2E.
．． Place 6 and crimp.

(d) As shown in FIG. 2F, this crimped body is cut into pieces of the same size as ceramic single pieces, and then fired and integrated.

FIG. 3 shows a second embodiment of the invention.

In this embodiment, the lead wire connection layers 41 and 42 are replaced by the conductive layer 3.
A second conductive layer 33. is provided on the surface of the same ceramic green sheet, and a second conductive layer 33 is provided on the back surface of the ceramic green sheet.
34 and are connected to the conductive layer end 31.32 through a through hole 35.36 filled with a conductive material, and the lead wire connection layer 41.42 and the second conductive layer 33.34
are connected to each other.

In this embodiment, the lead wires 5, 6 can be connected on the same surface as the conductive layer, and can be used when there are restrictions on the wiring of the lead wires.

FIG. 4 shows a third embodiment.

Reference numeral 9 indicates a flat oxygen concentration battery, in which porous platinum electrode layers 12.1 are provided on both sides of an oxygen ion conductive solid electrolyte sintered body 11.
3 and a lead wire connection layer 14 on the corresponding opposite surface.
．． 15 is formed, and the ends of the electrode layer 12 and the lead wire connection layer 14 are connected through two through holes 1G and 17 filled with a conductive material, and the electrode layer 13 and the lead wire connection layer 14 are
Connection is made through one through hole 16 filled with ifi material, and a platinum lead wire 5.6 is crimped and connected to the end of the conductive layer 12 and the lead wire connection layer 15, and then baked and integrated. .

Note that a plurality of through holes may be connected to the lead wire, and in this case, the connection between the lead wire and the conductive layer is made more reliable.

This oxygen concentration battery 9 is made by adding 61nO1% of yttrium (Y203) to zirconium (Zr02) and performing calcination 1.
After heating at 300°C, it is crushed to produce BMS, DBPXMEK,
A ceramic green sheet was created using a doctor blade method using toluene, through holes were provided, and screen printing was performed on the sheet using the paste (2).

[Effect of the invention] Since the lead wire rests on the through hole filled with conductive material in this way, even if the lead wire bites into the ceramic green sheet during crimping, it will rest on the conductive material filled in the through hole. Electrical connection between the lead wire and the conductive layer is ensured. Moreover, even if the periphery of the lead wire connection portion of the lead wire connection layer is cut by a crack due to the lead wire, the contact from the lead wire to the conductive layer is not affected at all.

The case where platinum is used for the conductive layer has been described above, but instead of platinum, heat-resistant metals such as tungsten and molybdenum or conductive ceramics such as silicon carbide can be used, and piezoelectric bodies such as piezo elements can be used as the ceramic body. It's okay.

[Brief explanation of drawings]

FIG. 1 shows lead wire core 1+:! of the present invention. A perspective view of a planar heating element showing one embodiment of the lamic body, FIG. 2 is a manufacturing process diagram, and FIG. FIG. 4 is a perspective view of the third embodiment of the ceramic body with lead wires of the present invention.
Main battery perspective view, FIG. 5 is a perspective view of a conventional ceramic body with lead wires.

Claims (1)

[Claims] 1) A conductive layer and a lead wire connection layer are deposited on the surface of an unsintered ceramic body, and a conductive material is filled into a through hole provided in the unsintered ceramic body to form the conductive layer. and a lead wire connection layer, the lead wire is crimped to the lead wire connection layer including the through hole, and then sintered and integrated. 2) The unsintered ceramic body has a plate shape formed from a ceramic raw material powder paste, and the conductive layer and the lead wire connection layer are conductive metal paste layers deposited on the front and back surfaces, respectively, and the through-hole Claim 1, characterized in that the hole is filled with conductive metal paste.
Ceramic body with lead wire as described in section. 3) The unsintered ceramic body has a plate shape formed by molding ceramic raw material powder paste, and the conductive layer is formed on the front and back surfaces of the unsintered ceramic body, and the conductive layer is formed on the through hole provided in the unsintered ceramic. The lead wire connection layer is connected via a conductive material filled in the hole, and the lead wire connection layer is provided on the surface of the green ceramic body and is connected to a conductive layer provided on the back surface of the green ceramic body. A ceramic body with a lead wire according to claim 1, wherein the ceramic body has a lead wire.