KR100302068B1 - A two terminal parts for piezoelectric elements - Google Patents

Abstract

The present invention relates to a two-terminal component for a piezoelectric element, the technical spirit of which is the first terminal 30 to which the piezoelectric element 10 and the condenser element 20 are connected inward and outward, and the condenser element 20. A second terminal 40 to which a central portion of the second terminal 40 is connected, and first and second leads 50 and 60 extending from a lower portion of the first and second terminals 30 and 40 and connected as a frame 70. The first supporting means 80 is partially cut away from the body of the first terminal 30 to be bent into the terminal, and is bent to the outside of the terminal at the boundary between the first terminal 30 and the first lead 50. It characterized in that it comprises a second support means (90).

Accordingly, when the piezoelectric element and the terminal are connected, the soldering state is firm and the diffusion of the molten lead is prevented, thereby improving the reliability of the piezoelectric component, as well as facilitating the assembly operation between the element and the terminal.

Description

2 terminal parts for piezoelectric element {A TWO TERMINAL PARTS FOR PIEZOELECTRIC ELEMENTS}

The present invention relates to a two-terminal component for integrally mounting a piezoelectric element and a condenser element using a piezoelectric effect on a substrate. More specifically, the soldering state of the connection between the piezoelectric element and the terminal is firm and the diffusion of molten lead is prevented. The present invention relates to a piezoelectric two-terminal part that not only improves the reliability of the piezoelectric part, but also facilitates connection work between the device and the terminal, thereby improving assembly performance.

In general, when a mechanical force is applied to a piezoelectric body, a voltage is generated, and when a signal is applied, vibration is generated. A specific frequency band is selected by using the latter vibration, or a piezoelectric element is used as a reference signal source of an electronic component. The piezoelectric element usually used as a piezoelectric element is made of BaTiO ₃ series or PZT series ceramics, and includes a piezoelectric filter for selecting video and audio signals (frequency) of a current communication media device for each specific band, and reference signals such as electronic devices. It is classified as a piezoelectric vibrator used as a circle.

In addition, the piezoelectric component in which such a piezoelectric element is combined with the terminal component includes the manufacturing of the piezoelectric element, an electrode forming process of depositing and patterning electrodes on the surface of the element, and a terminal component for mounting the element on a substrate; The bonding process, and finally, molding process such as wax dotting and epoxy coating, and finishing such as marking.

On the other hand, by packaging and using a piezoelectric element that generates a resonant frequency and a two-terminal part that is connected at the same time as a condenser element which is an essential part of the circuit configuration, the piezoelectric element can be easily miniaturized and simplified. 2. Description of the Related Art [0002] The use of two terminal parts for connecting and mounting capacitors and capacitors at the same time has become common.

Generally known piezoelectric elements and condenser elements, as shown in (a) and (b) of Figure 1, the electrode so as to overlap in the central portion on both sides of the thin plate-like piezoelectric element 10, which has undergone a process of manufacturing and polarization 12a and 12b are formed, and when a voltage is applied to both electrodes 12a and 12b of the piezoelectric element 10, vibration is generated at the electrode portion, and the capacitor element 20 has both ends and the other side of one side. Electrodes 22a and 22b are respectively formed at the central portion of the side surface.

The conventional two-terminal parts for piezoelectric elements related to this technique are located so as to face the piezoelectric element 10 in the longitudinal direction thereof, as shown in Figs. 2A and 2B. A bidirectional terminal 110 in which both electrodes 12 of the piezoelectric element 10 are connected to each other, and a support 120 is integrally formed at a lower portion thereof so as to support the piezoelectric element 10, and an outer surface of the bidirectional terminal 110. The condenser element 20 connected to the condenser element 20 and the other terminal 130b connected to the condenser element 20 are constituted.

In the conventional two-terminal component 100 for piezoelectric elements, the piezoelectric element 10 having the electrodes 12a and 12b formed at both ends thereof is supported as the terminal support portion 120 and then moved into the bidirectional terminal 110. The one side electrode 22a of the condenser element 20 is connected to the outer side surface of the terminal 110, and the other electrode 22b is connected to the other terminal 130b.

However, in the conventional two-terminal component 100 for piezoelectric elements as described above, as shown in FIG. 2, the capacitor element 20 does not have a separate support portion when connected to the terminal 110, so that the capacitor element There was a problem that the connection work of the terminals 100 and 130b of (20) was difficult and the connection state was also unstable.

In addition, perfect bending of the support part 120 formed by bending under the terminal 110 becomes difficult, so that molten lead flows down the terminal 120 during the connecting operation, while the molten lead easily flows into the piezoelectric element 100. There have been a number of problems such as the spread of the piezoelectric component, which is degraded.

On the other hand, in another conventional piezoelectric element terminal device for solving the above problems, as shown in Figs. 3 (a) and 3 (b), the electrodes formed on both side ends of the piezoelectric element 10 (12a) (12b) are connected from the inside, and the first terminal 210 to which both end electrodes 20a of one side of the condenser element 20 are connected to the outside, and the other side electrode of the condenser element 20 ( 20b) connected to the second terminal 220, the lower end of the first terminal 210 and the second terminal 220 extending below the second terminal 220 are integrally connected to the frame 250, the first and second leads 230 240 and the piezoelectric element 10 and the condenser element 20 are bent by bending the inside and the outside of the first terminal 210 at the connection portions of the first terminal 210 and the first lead 230. The first and second support pieces 260 and 270 are formed to have a configuration.

therefore. In another conventional piezoelectric two-terminal part 200, the portions of both electrodes 12a and 12b are connected to the first terminal 210 while the piezoelectric element 10 is supported by the first support piece 260. ), And the condenser element 20 is connected to the first terminal 210 and the second terminal 220 by soldering or the like while being supported as the second support piece 270.

However, in another conventional piezoelectric two-terminal component 200 as described above, as shown in Figure 3, when the terminal connection of the piezoelectric element 10 and the condenser element 20, the first, Since the upper ends of the two support pieces 260 and 270 are positioned on the same line, the heights of the condenser elements 20 of the piezoelectric element 10 of FIG. 1 are different from each other. The height is reduced by about 0.3mm compared to the condenser element 20) to improve the manufacturing and characteristics, and the connection position of the condensation element 20 and the piezoelectric element 10 connected to the outside of the first terminal 210 This is different, which is a problem that the soldering amount of the piezoelectric element 10 during the soldering operation of the terminal component 200 and each of the elements 10 and 20 is reduced.

In addition, the length of the planar portion (body portion) of the first terminal 210 is long, the molten lead is easily diffused to the piezoelectric element 10 during the connection work between the terminal component 200 and the element 10, 20, At the same time, the bending angle a of the first terminal 210 is formed to be approximately 43 degrees, resulting in a problem that the contact surface between the piezoelectric element 10 and the first terminal 210 is reduced, thereby lowering the reliability of the piezoelectric component.

On the other hand, the protruding portion of the substrate of the first and second leads 230 and 240 (when mounting the substrate of the terminal component 200, the lower ends of the reinforcement portions 230a and 240a of the first and second leads 230 and 240). The part is actually cut, and only the length of the reinforcement parts 230a and 240a, which are connected to the frame 250 to manufacture a plurality of terminal parts at the same time, in the manufacturing process of the terminal part 200, is too long. The board mounting height of the piezoelectric component to which the 10) 20 is connected is increased, making it difficult to miniaturize an electronic component or a device having the piezoelectric component.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems. The object of the present invention is to increase the bending angle of the first terminal and to shorten the flat portion of the first terminal, thereby reducing the contact surface between the piezoelectric elements of the first terminal. The present invention provides a two-terminal component for a piezoelectric element, which increases and makes soldering work robust and easy, while preventing molten lead from being diffused into the piezoelectric element.

Another object of the present invention is to adjust the position of the first and second support pieces for supporting the piezoelectric element and the condenser element so that the piezoelectric element and the condenser element are equally supported in the transverse direction, thereby connecting each element and the terminal component. A soldering operation of a piezoelectric element and a condenser element is performed at the same time uniformly to provide a two-terminal component for a piezoelectric element for preventing excessive molten lead from buried in one element.

In addition, another object of the present invention is to shorten the length of the reinforcing portions of the first and second leads, thereby lowering the board mounting position of the terminal component, thereby miniaturizing the electronic component or device having the piezoelectric component, thereby ensuring product reliability. The present invention provides a two-terminal component for a piezoelectric element that can be improved.

1 (a) and (b) are schematic perspective views showing a general piezoelectric element and a condenser element

2 (a) and 2 (b) are perspective views illustrating a conventional two terminal component for a piezoelectric element and an element installation state;

3 (a) and 3 (b) are perspective views showing a conventional two terminal component for a piezoelectric element and an element connection state;

4 is a perspective view showing a two-terminal part for a piezoelectric element according to the present invention;

5 is a perspective view showing a connection state between the two terminal parts for a piezoelectric element according to the present invention and an element;

6 (a) and 6 (b) are exploded views for comparing and explaining the conventional terminal parts with other terminal parts of the present invention;

Explanation of symbols on the main parts of the drawings

1 .... Terminal parts 10 .... Piezoelectric element

12,22 .... Device electrode 20 .... Capacitor device

30,40 .... 1st, 2nd terminal 50,60 .... 1st, 2nd lead

70 ... frame 80,90 ... first and second support means

As a technical means for achieving the above object, the present invention provides a piezoelectric element in which electrodes are formed on both side surfaces so as to overlap in the center, and a capacitor element having electrodes formed at both ends and one side center on one side thereof so as to be mounted on a substrate. In the 2-terminal part for an element,

A first terminal to which both end electrodes of the piezoelectric element and the condenser element are connected to an inner side and an outer side;

A second terminal to which a center electrode of the condenser element is connected;

First and second leads integrally extending from the lower part of the first and second terminals and integrally connected as a frame;

First support means which is partially cut in the body portion of the first terminal and bent into the terminal to support the piezoelectric element;

By providing a second terminal component for a piezoelectric element formed integrally with the boundary portion of the first terminal and the first lead and including a second support means that is bent outward to the terminal to support the capacitor element.

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

4 is a perspective view showing a two-terminal component for a piezoelectric element according to the present invention, Figure 5 is a perspective view showing a two-terminal component for a piezoelectric element according to the present invention and an element connection state.

As shown in Figs. 4 and 5, the electrode 12a is formed so as to overlap the center portions on both side surfaces of the piezoelectric element 10 which has undergone a polarization process in which a high voltage is applied to the wafer processing and the piezoelectric body and the polarization structure is arranged in a predetermined direction. 12b) are formed respectively, and when a voltage is applied to the piezoelectric element 10, vibration is generated at the center portion where the electrodes 12a and 12b overlap.

Electrodes 22a and 22b are formed at both ends of one side and the other side of the capacitor element 20 connected to the terminal component 1 together with the piezoelectric element 10, respectively. By connecting the piezoelectric element 10 to the terminal part 1 together with the piezoelectric element 10 together with the piezoelectric element 10, the condenser element 20, which is an essential component of the circuit structure, can be miniaturized. To facilitate the design of the circuit.

At this time, as shown in FIG. 4, the piezoelectric element 10 and the first electrode 12a, 22a formed at both ends of the condenser element 20 are soldered to the inner side and the outer side, respectively. The terminal 30 is formed to be bent to cover both ends of the piezoelectric element 10 inwardly, wherein the bending angle A is 47 ° -58 °, preferably 53 to the center of the first terminal 30. It is formed at °, so that the contact surface of the piezoelectric element 10 connected to the inside of the first terminal 30 to increase the soldering amount, if the bending strength (A) is less than 47 ° piezoelectric element 10 If the contact surface of is small and, on the contrary, is larger than 58 °, the connection of the element 10 by the first terminal 30 becomes unstable.

On the other hand, as shown in Figure 4, the length (D) of the body portion that the flat portion of the first terminal 30, that is, the piezoelectric element 10 and the condenser element 20 in contact with both sides is 0.6-0.8mm Preferably, it is formed to be 0.7 mm, the reason for shortening the length (D) of the body portion than the conventional, the terminal 30 and the element 10 by reducing the contact surface with the piezoelectric element 10 or the condenser element 20 This is to prevent the diffusion of molten lead easily into the piezoelectric element 10 during the connection operation between the 20 and, if smaller than 0.6 mm or larger than 0.8 mm, the contact surface is too small or large, poor soldering or diffusion of molten lead It is made that the reliability of the piezoelectric component is reduced.

In addition, as shown in FIG. 5, electrodes 22a formed at both ends of one side surface of the condenser element 20 are connected to an outer surface of the first terminal 30 to which the piezoelectric element 10 is connected inward. At the same time, an electrode 22b formed at the center of the other side of the condenser element 20 is connected to one side of the plate-shaped second terminal 40 positioned inwardly of the first terminal 30 opposite to both sides. The second terminal 40 serves as a ground terminal.

Subsequently, as shown in FIGS. 4 and 5, in the manufacturing process of the terminal component 1, the first and second leads are integrally integrated in the longitudinal direction under the first and second terminals 30 and 40. As the 50 and 60 are extended and connected as the frame 70, one terminal component 1 is shown in the drawing, but substantially on one frame 70 during the manufacturing process of the terminal component 1. A plurality of first and second leads 50 and 60 are connected to form a plurality of first and second terminals 30 and 40 in sequence so as to manufacture a plurality of terminal parts 1 at a time.

At this time, the reinforcement parts 50a and 60a are integrally formed at the lower side of the boundary between the first and second terminals 30 and 40 and the first and second terminals 30 and 40, which is a manufacturing process of the platen component. The reinforcing portions 50a and 60a protrude from the substrate when the substrate component of the terminal component 1 to which the piezoelectric element 10 and the condenser element 20 are connected is projected on the substrate, whereby the first and second leads 50 ( The length H of the reinforcement parts 50a and 60a of the 60 is formed from 1.0 to 1.2 mm, and the length of such reinforcement parts 50a and 60a is less than 1.0 mm or more than 1.2 mm. If it is large, the board mounting state of the terminal component 1 is weak or the projecting height is large, which makes it difficult to miniaturize components such as electronic components having piezoelectric components or communication apparatuses which are becoming smaller.

On the other hand, while the piezoelectric element 10 is supported by the first support means 80 partially cut away from the body of the first terminal 30, the connection between the first terminal 30 and the piezoelectric element 10 is firm. The condenser element 20 is firmly supported by the second support means 90 which is integrally formed at the boundary between the first terminal 30 and the first lead 50 and is bent outward to support the terminal. Terminal connection is made in the state.

At this time, as will be described in detail in the following Figure 6, the position of the first support means 80 is partially bent and bent in the body portion of the terminal component 1, the second support means 90 and the terminal 30 The piezoelectric element 10 and the condenser element 20, which are bent at the boundary of the first lead 50 and supported by the first and second supporting means 80 and 90, are positioned in the same transverse direction.

That is, the piezoelectric element 10 and the condenser element 20 connected to the first terminal 30 are located in the transverse direction, which is the same direction, which is used to connect the terminal component 1 of each element 10, 20. It is to prevent the operation of the piezoelectric component due to poor connection by preventing excessive soldering to either element during the soldering operation.

6A and 6B are exploded views for comparing and explaining another conventional terminal component with the terminal component of the present invention.

As shown in Figure 6, the length (d) (D) of the body portion of the first terminal 210, 30 is shortened by 0.3mm from 1mm to 0.7mm in the prior art to prevent the diffusion of the device 10, 20 of molten lead In addition, since the first supporting means 80 of the present invention is positioned upward by about 0.3 mm from the body portion of the first terminal 30 as compared with the conventional first supporting piece 210, the piezoelectric element 10 and the condenser Since the element 20 is located on the same plane and connected to the first terminal 30, the element 20 is prevented from being excessively soldered to either the piezoelectric element 10 or the condenser element 20 when soldering for the terminal connection. Lastly, the reinforcement portions 50a of the first and second leads 50 and 60 of the present invention have a height h of the reinforcement portions 230a and 240a of the first and second reproducing portions 230 and 240. The height (H) of the terminal (1) was shortened to about 0.3 mm by 1.1 mm to reduce the board mounting height of the terminal component 1, thereby miniaturizing the electronic component or device having the piezoelectric component.

As described above, according to the two-terminal component for piezoelectric elements of the present invention, the contact surface between each element and the terminal is increased, so that soldering work is performed firmly and easily, while diffusion of molten lead is prevented, so that the piezoelectric element and the capacitor element are connected There is an effect of improving the reliability of the piezoelectric component having a.

In addition, since soldering is performed uniformly during the soldering operation for connecting each element and the terminal component, an excessive amount of molten lead is prevented from being applied to one element, and the board mounting position of the terminal component is lowered. The miniaturization of parts or communication devices can be achieved, and the product reliability is improved.

Claims (4)

A piezoelectric element 10 having electrodes 12a and 12b formed on both sides thereof so as to overlap at the center, In the two-terminal component (1) in which the capacitor elements (20) having the electrodes (22a) and (22b) formed at both ends of one side and at the other side center thereof are connected to the board. A first terminal 30 to which both electrodes 12 and 22a of the piezoelectric element 10 and the condenser element 20 are connected to an inner side and an outer side; A second terminal 40 to which the center electrode 22b of the condenser element 20 is connected; First and second leads 50 and 60 which are integrally extended from the lower part of the first and second terminals 30 and 40 to be integrally connected as the frame 70; First support means 80 partially cut away from the body of the first terminal 30 to be bent into the terminal to support the piezoelectric element 10; And a second support means (90) which is integrally formed at the boundary between the first terminal (30) and the first lead (50) and is bent to the outside of the terminal to support the condenser element (20). 2-terminal parts for devices The method of claim 1, wherein the bending angle (A) of the first terminal 30 connected to surround both ends of the piezoelectric element 10 is composed of 47 °-58 ° 2 terminal parts for the piezoelectric element. 3. The two-terminal part for piezoelectric elements according to claim 1 or 2, wherein the length D of the flat portion of the first terminal 30 is 0.6-0.8 mm. The piezoelectric element of claim 1, wherein the length H of the reinforcement parts 50a and 60a, which are the protruding portions of the substrate formed on the first and second leads 50 and 60, is formed to be 1.0 to 1.2 mm. 2-terminal parts