JPH0110013Y2 - - Google Patents

Description

[Detailed description of the invention] This invention uses an anisotropically conductive conductive sheet that conducts current in the thickness direction but exhibits insulation in the lateral direction. Regarding the contact structure of parts.

Conventionally, in electronic components such as two-terminal piezoelectric resonators, as shown in FIG. electrodes 3, 3
The spring parts 5, 5 provided at the tips of the two lead terminals 4, 4 are in point contact with each other. The piezoelectric resonator main body 1 is housed in the exterior case 6 while being held between the spring parts 5 by the spring force of the spring parts 5, 5.

As mentioned above, the spring portion 5,
When the piezoelectric resonator body 1 is sandwiched between the piezoelectric resonator body 1 and the piezoelectric ceramic plate 2, the spring force of the spring portions 5, 5 is directly applied to the piezoelectric ceramic plate 2. Therefore, when thermal fluctuations or mechanical stress are applied to the exterior case 6, the stress is applied to the piezoelectric ceramic plate 2 via the spring parts 5, 5, causing cracks and damage to the piezoelectric ceramic plate 2. There was a problem.

The present invention was devised to solve the above-mentioned problems in the conventional contact structure of electronic components, and it prevents the electronic components from being damaged due to stress applied to the electronic components from the outside, and also prevents the electronic components from being damaged due to external stress. It is an object of the present invention to provide a contact structure for an electronic component that improves the conductive characteristics between the electrode contact member and the electrode contact member.

For this reason, the present invention provides a contact structure for electronic components in which an electrode contact member is pressed into contact with an electrode of an electronic component to make them mutually conductive. An anisotropically conductive conductive sheet having a conductive thin film formed on a perpendicular surface thereof is interposed between the electrode and the electrode contact member, and a spring portion formed on the electrode contact member is connected to the conductive thin film. It is characterized by point contact with the

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 2 shows an embodiment in which the present invention is applied to the two-terminal piezoelectric resonator described in FIG. 1.

In FIG. 2, 11 is a piezoelectric resonator main body having electrodes 13, 13 formed on both sides of a piezoelectric ceramic plate 12, 4, 4 are lead terminals as electrode contact members made of a metal having spring properties, 15, 15 1 is a conductive sheet which will be described next, and 16 is an outer case.

As shown in FIG. 3, the conductive sheet 15 is
Conductors such as graphite fibers and thin metal wires are embedded in a sheet material 17 made of an elastic material such as rubber to provide anisotropic conductivity. On the conductive sheet 15, conductive thin films 18, 18 are respectively formed on each of the two surfaces perpendicular to the thickness direction thereof by vapor deposition or sputtering.

The conductive sheets 15, 15 are interposed between the spring portion 5 of the lead terminal 4 and the piezoelectric resonator body 11, and between the spring portion 5 of the other lead terminal 4 and the piezoelectric resonator body 11, respectively. ing. As a result, the conductive thin films 18, 18 of the conductive sheet 15 are connected to the electrodes 13 and lead terminals 14 of the piezoelectric resonator body 11.
surface contact and point contact, respectively, with the spring portion 5 of. In addition, the conductive thin film 18 of another conductive sheet 15,
18 makes surface contact and point contact with the electrode 13 of the piezoelectric resonator body 11 and the spring portion 5 of the lead terminal 14, respectively. In this state, the piezoelectric resonator main body 11 is housed in the outer case 16.

If the piezoelectric resonator main body 11 is sandwiched between the lead terminals 4 as described above, the stress applied to the outer case 16 will be transferred to the conductive sheets 15 and 4.
Absorbed by 15. Thereby, damage to the piezoelectric resonator main body 11 can be prevented.

Further, since conductive thin films 18, 18 are formed on each of the two surfaces of the conductive sheet 15, for example, the spring force of each spring portion 5 of the lead terminals 4, 4 causes the fourth Even if the sheet material 1 is deformed due to the force of displacement as shown by the arrow in the figure,
There is no change in the number of conductors embedded within 7 and in electrical contact with the conductive thin films 18, 18. Therefore, the resistance between the conductive thin films 18, 18 does not change due to the deformation of the conductive sheet 15, and its value is 0.1.
It becomes a stable value of about ohm.

In addition, the spring portion 5 of the lead terminal 4 and the conductive sheet 1
5 and the contact position with the conductive thin film 18 of the piezoelectric resonator 11 and the conductive thin film 18 of the conductive sheet 15
Even if the contact positions of the lead terminals 4 and the electrodes 13 are not opposite to each other with the sheet material 17 in between,
The resistance value between is the same value as above.

On the other hand, if a conductive sheet (not shown) on which the conductive thin films 18, 18 are not formed is used, the deformation of the conductive sheet due to the above-mentioned deviation may cause the lead terminals 4, 4 and the piezoelectric resonator body 11 to Electrode 13,1
The electrical characteristics between the lead terminals 14, 14 and the electrodes 13, 13 are extremely unstable.

As is clear from the above detailed explanation, the present invention has the advantage of attaching a spring portion of an electrode contact member to a conductive thin film formed on a plane perpendicular to the thickness direction of a conductive sheet having anisotropic conductivity. Since the electrode of the electronic component and the electrode contact member are brought into contact with each other to conduct electricity with each other, the elasticity of the conductive sheet reduces the stress applied to the electronic component, preventing damage to the electronic component due to stress applied from the outside. Not only can this be prevented, but the number of conductors in the conductive sheet that are electrically connected to each other with the electrode contact member increases, and the resistance between the electrode of the electronic component and the electrode contact member becomes a stable, constant low value. It is possible to reduce fluctuations in electrical characteristics before and after the step of assembling into the exterior case.

[Brief explanation of the drawing]

FIG. 1 is a side view of a conventional piezoelectric resonator, FIG. 2 is a side view of a piezoelectric resonator to which the present invention is applied, and FIG. 3 is a cross-sectional view of a conductive sheet used in the piezoelectric resonator shown in FIG. FIG. 4 is a sectional view showing a deformed state of the conductive sheet shown in FIG. 3. 4... Lead terminal, 5... Spring portion, 11... Piezoelectric resonator body, 12... Piezoelectric ceramic plate, 13... Electrode, 15... Conductive sheet, 16... Exterior case,
17... Sheet material, 18... Conductive thin film.

Claims (1)

[Scope of Claim for Utility Model Registration] A contact structure for an electronic component in which an electrode contact member is brought into pressure contact with an electrode of the electronic component so that they mutually conduct electricity, which has conductivity in the thickness direction and elasticity, and has elasticity in the thickness direction. An anisotropically conductive conductive sheet having a conductive thin film formed on a surface perpendicular to the electrode is interposed between the electrode and the electrode contact member, and the spring portion formed on the electrode contact member A contact structure for electronic components characterized by point contact with a conductive thin film.