JPH0338106A - Electronic component - Google Patents

Abstract

PURPOSE:To prevent a stress due to a bent or deflection of a printed circuit board or the like from being applied to an electrode contact piece and to improve the reliability of electric and mechanical connection by forming a notch to partition the electrode contact piece and a 2nd retainer piece to a link piece linking the electrode contact piece, 1st and 2nd retainer pieces. CONSTITUTION:An outer package 1 has two major faces A, B opposite to each other, recessed parts 4, 5 from the surface are provided to at least one major face such as the end of the major face A and lead electrodes 6, 7 led out from an electronic component are placed in the recessed parts 4, 5. Link pieces 204, 304 linking electrode contact pieces 201, 301, 1st retainer pieces 202, 302 and 2nd retainer pieces 203, 303 have notches 206, 306 formed to partition the electrode contact pieces 201, 301 and the 2nd retainer pieces 203, 303. When terminals 2, 3 are fixed to the conductor pattern 81 on the circuit board 8 by using a conductive adhesives 9, no conductive adhesives 9 is adhered to the electrode contact pieces 201, 301 with the notches 206, 306 and a stress due to bent or deflection of the circuit board 8 or the like is avoided.

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention provides a method in which a lead electrode of an electronic component element is located at the end of an exterior body covering the electronic component element, and a conductive terminal is attached to the lead electrode. Regarding the electronic component, the terminal includes a lead electrode contact piece, a first holding piece that is attached to the side of the electrode contact piece through a slit, and a second holding piece that faces the electrode contact piece and the first holding piece. and a connecting piece that connects the electrode contact piece, the first holding piece, and the second holding piece, and the electrode contact piece, the first holding piece, and the second holding piece. When mounting on a circuit board, etc., by attaching so as to sandwich the exterior body between them, and providing a notch in the connecting piece to partition the electrode contact piece and the second holding piece.
When the terminal is fixed with conductive adhesive such as solder, the notch blocks stress caused by warping or bending the circuit board from being applied to the electrode contact piece, improving the reliability of electrical and mechanical connections. This is how it was done.

<Prior art> Specific examples of electronic components in which lead electrodes are positioned at the ends of an exterior body that covers an electronic component element and terminals that conduct to the lead electrodes are attached include, for example, filters, resonators, or oscillators. can be raised.

FIG. 9 is a perspective view of this type of electronic component previously proposed. In the figure, 1 is an exterior body that covers an electronic component element (not shown), and 2 and 3 are terminals.

The exterior body 1 has two opposing main surfaces A and B,
A recess 4.5 is provided in at least one of the main surfaces A and B, for example, at the end of the main surface A, and a lead electrode 6.7 led out from the electronic component element is positioned in the recess 4.5. .

The terminal 2.3 is formed by pressing a metal plate material, and has an electrode contact piece 20 that contacts the lead electrode 6.7.
1.301, a first holding piece 202.302, a second holding piece 203.303, and a connecting piece 204.304.

Electrode contact piece 201.301 and first holding piece 202.30
2, there is a slit 205.305 that partitions both.
is provided, and the electrode contact piece 201.301 is connected to the first
Separated from the holding piece 202.302 of the lead electrode 6.
7 to ensure contact. Electrode contact piece 20
1.301, the first holding piece 202.302 and the second holding piece 203.303 are integrated by a connecting piece 204.304.

During assembly, the terminal 2.3 is connected to the electrode contact piece 201.3.
01, the first holding piece 202.302, and the second holding piece 203.303 are attached to the end of the case 1 so that the case 1 is held between them. 'F4. FJ contact piece 20
1.301, by means of soldering etc., the recess 4.5
It is fixed to the lead electrode 6.7 inside.

<Problems to be Solved by the Invention> In the electronic component described above, the electrode contact piece 201.301 is connected to the first holding piece 202.3 by the slit 205.305.
Since it is separated from 02, the first holding piece 202.30
2 without interference by the electrode contact piece 201.3.
01 can be brought into reliable contact with the lead electrode 6.7. However, as shown in FIG. 10, when the electronic component is placed on the circuit board 8 and the terminals 2.3 are fixed to the conductive pattern 81 using a conductive adhesive 9 such as solder, Point fj! When warping or bending as shown in (a) and (b) occurs, stress in the direction of arrow 8% b is applied to the electrode contact piece 201.301, and the lead electrode 6.7 peels off due to this stress. There was a problem.

As a means for connecting the terminal 2.3 to the conductor pattern 81,
Lead wires may be used, but in this case as well, similar problems occur because the electronic components are fixed to the circuit board 8 with an adhesive or the like.

Therefore, an object of the present invention is to solve the above-mentioned conventional problems, prevent stress caused by warping or bending of the circuit board/board from being applied to the electrode contact piece, and improve the reliability of electrical and mechanical connections. The objective is to provide improved electronic components.

Means for Solving the Problems〉1 In order to solve the above problems, the present invention provides an electronic component element,
An electronic component including an exterior body that covers the electronic component element and a terminal, wherein the exterior body has two opposing main surfaces, and at least one of the major surfaces has an edge at an end thereof. The terminal has a lead electrode led out from the electronic component element, and the terminal is made of a metal member and includes an electrode contact piece that contacts the lead electrode and a slit on the side of the electrode contact piece. A first presser piece provided side by side, a second presser piece that faces the electrode contact piece and the first presser piece, and connects the electrode contact piece, the first presser piece, and the second presser piece. and a connecting piece attached to an end of the exterior body so as to sandwich the exterior body between the electrode contact piece, the first presser piece, and the second presser piece. The connecting piece is characterized in that it has a notch formed to partition between the electrode contact piece and the second presser piece.

Function> The connecting piece that connects the electrode contact piece, the first presser piece, and the second presser piece has a notch formed to partition between the electrode contact piece and the second presser piece. When mounted firmly on a circuit board or the like, the stress caused by warpage or bending of the circuit board is blocked by the notch, and the stress transmitted to the electrode contact piece is significantly reduced. This prevents the lead electrode from peeling off due to stress.

<Example> FIG. 1 is a perspective view of an electronic component according to the present invention. In the figure, the same reference numerals as in FIG. 9 indicate the same components. The connecting piece 204.304 connecting the electrode 8i contact piece 201.301, the first holding piece 202.302, and the second holding piece 203.303 is the electrode contact piece 201.3.
01 and the second presser piece 203.303.

When mounting on a circuit board, etc., as shown in FIG.
If it is stuck to the upper conductor pattern 81, the notch 206.3
06, the conductive adhesive 9 does not adhere to the electrode contact portions 201.301. Therefore, stress caused by warpage, bending, etc. of the circuit board 8 is cut off by the notches 206, 306, the stress transmitted to the electrode contact piece 201, 301 is significantly reduced, and peeling of the lead electrode 4.5 due to the stress is prevented.

As a means for connecting the terminal 2.3 to the conductor pattern 81,
Using lead wires, attach electronic components to circuit board 8 with adhesive, etc.
Similar effects can be obtained when the material is fixed to the surface.

FIG. 3 shows a perspective view of another embodiment of the electronic component according to the present invention. In this example, the connecting piece 204.3
One end edge of 04 rises from the middle part of the width of the exterior body 1 and extends onto the main surface A of the exterior body 1, and the end edge extends laterally, and further extends toward the outside of the exterior body 1. A notch 206.306 is provided between the electrode contact piece 201.301 and the second holding piece 203.303. In this embodiment as well, the same functions and effects as in the embodiment shown in FIG. 1 can be obtained.

FIG. 4 is an exploded perspective view of an electronic component according to the present invention as a piezoelectric component, FIG. 5 is an enlarged front sectional view, and FIG. 6 is a sectional view taken along the A r A + line in FIG. 5. 100
The front cover 110 constituting the exterior body 1 is also a back cover, and 120 is a piezoelectric vibrator: The piezoelectric vibrator 120 has a structure in which a plurality of vibrating parts 11 and 12 are formed at intervals on a piezoelectric substrate 10. It becomes.

Each of the vibrating parts 11.12 has front electrodes 13 to 16 formed on the front surface of the piezoelectric substrate 10, and a front electrode 1 on the back side.
3 to 16, and back electrodes 17 and 18 provided to face each other. Further, capacitive electrodes 19 and 20 are formed on the piezoelectric substrate 10.

The front electrodes 13 to 16 are divided electrodes divided by gaps gr and g2, and are connected to lead electrodes 4.5 provided on both sides of one end edge of the piezoelectric substrate 1°, respectively.
The front electrode 14 and the front electrode 16 are connected to each other via a capacitive electrode 19.

The back electrodes 17 and 18 and the capacitive electrode 20 are commonly connected to a ground electrode 21 provided on the back surface of the piezoelectric substrate 10.

The front cover 100 includes a cavity layer 101 and a sealing layer 102, and the back cover 110 includes a cavity layer 111, a sealing layer 112, an adhesive layer 113, and a reinforcing layer 114.

The cavity layer 101.111 has cavities 22 to 25 in portions corresponding to the vibrating portions 11.12, and is brought into close contact with the piezoelectric substrate 10. The cavities 22-25 have openings 26.27 at positions away from the front electrodes 13-16 and the back electrodes 17.18 of the vibrating section 11.12. Cavity parts 22 to 25
is formed into a nearly circular shape so as to surround the front electrodes 13 to 16 and the back electrodes 17.18, and a part thereof is formed into a narrow passage 28.
- 31 and communicate with the openings 26 and 27.

The edges of the cavity layer 111 and the sealing layer 112 of the back cover 110 are provided with cutout portions 32 and 33 that expose the ground electrode 21 provided on the back surface of the piezoelectric substrate 10. 34 is a missing portion provided at the edge of the front cover 100.

The sealing layer 102.112 is made of insulating resin, and the opening 26
．． 27 is tightly attached to the top of the cavity layer 101 and 111 so as to close it. It is desirable that the sealing layers 102 and 112 be formed of ultraviolet curing resin.

Cavity layer 101 and sealing layer 1 constituting front cover, -100
02, the portions corresponding to the ends of the lead electrodes 4.5 provided at the corners of the surface of the piezoelectric substrate 10 are cutouts 35 to 38.
The terminal 2.3 is connected to these notches 35 to 3.
8 and is electrically connected to the lead electrode 4.5.

The terminal 2.3 is formed using a thin metal plate having spring properties, and is inserted through the notches 35 to 38 to the lead electrode 4.
5 and the electrode contact piece 201°301 that contacts the front cover 1.
00 first presser piece 202, 302, reinforcing layer 1
14, and a connecting piece 204.304 that connects them. Connecting piece 2
-4° 304 has a notch 2 so as to partition between the electrode contact piece 201.301 and the second holding piece 203.303.
06.306 is established.

The electrode contact piece 201.301 is connected to the first holding piece 202.3.
02 are spring pieces separated by slits 205 and 305. The front cover 100 has lead electrodes 4
．． 5, and a step corresponding to the thickness of the front cover 100 is formed between the lead electrode 4.5 and the surface of the front cover 100. The height of the electrode contact piece 201.301 is such that it contacts the lead electrode 4.5, and the height of the first presser piece 202.302 is such that it contacts the surface of the front cover 100. Therefore, the above-mentioned level difference can be absorbed.

The reinforcing layer 114 constituting the back cover 110 is made of glass, epoxy resin, etc.
It is adhered to the surface of the sealing layer 112 constituting 0. The reinforcing layer 114 is provided only on the back cover 110 side,
It is not provided on the front cover 100 side. Therefore, it becomes thin.

One end edge of the reinforcing layer 114 is provided with the hollow layer 1 of the front cover 100.
01, the cavity layer 111 of the back cover 110, and the sealing layer 1
A cutout portion 39 is provided so as to correspond to the cutout portions 32 and 33 provided at the edge of the cutout portion 12, and an extraction electrode 40 is provided continuously from the inner surface of the cutout portion 39 to the back surface side.

Sealing layer 102.1 of front cover 100 and back cover 110
12 is formed by printing resin paint, the opening 2
The resin paint that has flowed into the cavities 13 to 16 from 6.27 may enter the vibrating portion 11.12. As a means for preventing this, as shown in FIGS.
18, there is a barrier section 41 that prevents resin inflow.
It is effective to provide 44.

<Effects of the Invention> As described above, the electronic component according to the present invention is an electronic component that includes an electronic component element, an exterior body that covers the electronic component element, and a terminal, and the exterior body has two opposing parts. At least one of the main surfaces has a lead electrode led out from the electronic component element at its end, and the terminal is
An electrode contact piece that is made of a metal member and contacts the lead electrode, a first holding piece that is attached to the side of the electrode contact piece through a slit, and facing the electrode contact piece and the first holding piece. a second presser piece that connects the electrode contact piece, the first presser piece, and the second presser piece, the electrode contact piece, the first presser piece, and the second presser piece. The connecting piece has a notch formed to partition between the electrode contact piece and the second holding piece. Therefore, it is possible to prevent stress due to warping or bending of the circuit board from being applied to the electrode contact piece, thereby providing an electronic component with improved reliability of electrical and mechanical connections.

[Brief explanation of drawings]

FIG. 1 is a perspective view of an electronic component according to the present invention, FIG. 2 is a diagram showing its use, FIG. 3 is a perspective view of another embodiment, and FIG. 4 is an embodiment of the electronic component as a piezoelectric component. FIG. 5 is an enlarged front sectional view, FIG. 6 is a sectional view taken along line A and -A in FIG. 5, FIG. 7 is an enlarged front sectional view of another embodiment, and FIG. 8 is an enlarged front sectional view. A2-A in Figure 7
9 is a perspective view of a conventional electronic component, and FIG. 10 is a diagram illustrating the problem thereof. 1...Exterior body 2.3...Terminal 201.301
...Electrode contact piece 202.302...First holding piece 203.303...Second holding piece 204.304...Connection piece 205.305...Slit 206, 0 ・Notch proverb diagram Figure 4 Figure Figure i DolJ5 Pull U5 So

Claims (1)

[Claims] (1) An electronic component including an electronic component element, an exterior body covering the electronic component element, and a terminal, the exterior body comprising:
It has two main surfaces facing each other, at least one of the main surfaces has a lead electrode led out from the electronic component element at its end, and the terminal is made of a metal member. an electrode contact piece that contacts the lead electrode, a first holding piece that is attached to the side of the electrode contact piece through a slit, and a first holding piece that faces the electrode contact piece and the first holding piece. a connecting piece that connects the electrode contact piece, the first presser piece, and the second presser piece; the electrode contact piece, the first presser piece, and the second presser piece; The connection piece is attached to an end of the exterior body so as to sandwich the exterior body between the connecting piece and the second holding piece. An electronic component characterized by having a notch formed in the.