JP4162384B2 - Crystal oscillator - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a crystal resonator used in information equipment such as a mobile phone and a computer.
[0002]
[Prior art]
In an electronic component having a conventional lead frame, as shown in FIG. 7, a lead frame 500 is disposed at the center in the vertical direction of the resin 40, and the end of the lead frame is bent to bring the electrode terminal 510 to the outside of the component. It is arranged.
[0003]
[Problems to be solved by the invention]
In a conventional electronic component, the lead frame is bent after the molding resin is sealed. Therefore, in order to create a lead terminal, it is necessary to clamp the outside of the mold resin and form the lead terminal away from the surface of the mold resin, and the width of the outside of the lead terminal becomes larger than the width of the mold resin, There was a problem that miniaturization was impossible.
[0004]
Further, since the tip of the lead terminal is also in contact with the substrate, it is necessary to bend the outside of the electronic component, and the width of the lead terminal and the tip of the lead terminal is larger than that of the mold resin.
[0005]
FIG. 8 is a side view of a conventional electronic component. The lead frame 500 is formed by injection molding so that the resin 40 is arranged vertically. The lead frame 500 is bent at the tip, an electrode terminal 510, and the tip 520 of the electrode terminal. The interval 530 is larger than the width of the resin 40.
[0006]
[Means for Solving the Problems]
The present invention includes a can having a vibration piece therein and horizontally arranged in the axial direction, a lead wire disposed at one end of the can and connected to the vibration piece, an electrode terminal connected to the lead wire, The lead of the resin is formed of a resin that covers the can, the lead wire, and the electrode terminal, and the back surface of the lower surface electrode that is integrally formed with the upper surface electrode, the electrode terminal being connected to the lead wire. By forming a crystal unit at the corner of the bottom on the wire side, a small crystal unit with the same width and height as the can can be obtained, and the lead frame area that hinders miniaturization of the crystal unit Can be minimized, and a small and thin crystal resonator can be obtained.
[0007]
In the present invention, the lead frame is punched and bent to form an electrode terminal, the lead wire connected to the vibrating piece is joined to the electrode terminal, and the upper surface of the electrode terminal is molded with resin. A plurality of crystal resonators can be simultaneously formed on one lead frame by the step and the step of cutting the electrode terminal.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
In the apparatus of the present invention, an electrode terminal formed from a lead frame is provided at the bottom of the mold resin of the crystal resonator, and the electrode terminal is connected to a lead wire connected to the resonator via a bent portion. Then, the whole is molded by resin.
[0009]
In the crystal resonator configured as described above, the bottom surface of the lead frame becomes the bottom surface of the resonator, and the connection to the resonator element is performed by bending the lead frame inside the resin, so that the electrode terminal can be minimized. .
[0010]
In the present invention, the terminal is provided on the surface opposite to the surface having the lead wire of the can having the resonator element, and the bottom surface of the terminal is disposed at the bottom of the crystal unit. When the crystal unit is mounted on this terminal, it can be connected to the substrate together with the electrode terminal by soldering. As a result, the crystal unit can be firmly surface-mounted on the substrate.
[0011]
【Example】
1 is a cross-sectional view of an embodiment of a crystal resonator according to the present invention. In FIG. 1, the crystal resonator includes a can 10, an electrode terminal 100, and a resin 40. . Here, the axial direction of the tube-type can 10 having the VT-cut vibrator piece inside is arranged horizontally.
[0012]
In addition, an electrode terminal 100 formed by bending a lead frame is connected to a lead wire 20 disposed at one end of the can 10 and plated with a core of a cover of core material by solder. Here, the electrode terminal 100 includes a lower surface electrode 120 on the lower surface of the crystal unit formed integrally and an upper surface electrode 110 connected to the lead wire 20.
[0013]
And the terminal 50 of the head is arrange | positioned in the crystal oscillator lower surface near the surface on the opposite side to the surface with the lead wire 20 of the can 10.
[0014]
There is a hole 80 for inserting a positioning pin at the time of injection molding in the upper part of the head of the can 10, and there is also a hole 70 for inserting a positioning pin in the lower part of the head of the can 10. Here, a junction 60 is formed between the lower electrode into which the resin is inserted during injection molding and the can .
[0015]
FIG. 2 is a view showing the lower surface of the crystal resonator according to the present invention. On the lead wire side of FIG. 1, a first electrode terminal 140 connected to one lead wire is formed at the upper right corner, A second electrode terminal 150 connected to the other lead wire is formed at the lower right corner. And the junction 60 has a hole inside the end face where the first electrode terminal 140 and the second electrode terminal 150 are located.
[0016]
Further, a terminal 50 on the head is provided on the left side of FIG. 2 on the opposite side of the lead wire, and a hole 70 for inserting a positioning pin is provided on the inner side of the end face where the terminal 50 is located.
[0017]
FIG. 3 is a side view of the crystal resonator according to the present invention. The resin 40 has a terminal 50 at the left end of the bottom and a second electrode terminal 150 at the right end.
[0018]
Next, the manufacturing method of the Example of this invention is described. 4, the can 10 is placed on a lead frame 300 made of phosphor bronze, and the lead wire 20 and the upper surface electrode 110 are welded. Further, a side view of this step is shown in FIG. The upper surface electrode 110, the terminal 50, and the vertical portion 320 are formed by bending on the upper surface of the lead frame 300 formed into a predetermined shape by punching, and the upper surface electrode 110 and the lead wire 20 are welded.
[0019]
FIG. 6 is an enlarged view of one crystal resonator in the process of FIG. 4, and is connected to the lower electrode 120, the upper electrode 110 integrally formed with the lower electrode 120, and the upper electrode on a part of the lead frame 300. Lead wire 20. Further, a portion of the terminal 50 facing the head of the can 10 is bent to form a vertical portion 52, and the terminal 50 is disposed with a certain distance from the head of the can 10. Finally, it is covered with a mold so as to be surrounded by a dotted line, and a liquid crystal polymer is injection molded. Finally, the lead frame 300 is cut within a dotted line range to obtain an electrode shape.
[0020]
As another embodiment of the present invention, the present invention can be applied to mounting parts using electronic parts such as piezoelectric vibrators, capacitors, resistors, etc. using PLZT, PZT, etc., instead of quartz vibrators.
[0021]
【The invention's effect】
The present invention is implemented in the form as described above, and has the following effects.
[0022]
By providing an electrode terminal at the bottom of the mold resin and a bent part inside the resin, the electrode terminal and the vibrator can be connected without bending the vibrator lead, so it is small and almost the same as the can around the vibrator A crystal resonator of a size can be made.
[0023]
Then, after bending the lead frame and connecting the can having the vibrator, it can be molded and connected to the electrode terminal portion, and a plurality of small crystal vibrators can be manufactured simultaneously from one lead frame. it can.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view of a crystal resonator according to the present invention.
FIG. 2 is a bottom view of the crystal resonator of the present invention.
FIG. 3 is a side view of the crystal resonator according to the present invention.
FIG. 4 is a top view showing an embodiment of the present invention.
FIG. 5 is a side view showing an embodiment of the present invention.
FIG. 6 is a top view showing an embodiment of the present invention.
FIG. 7 is a side view of a conventional crystal resonator.
FIG. 8 is a side view of a conventional crystal resonator.
[Explanation of symbols]
10 Can 20 Lead wire 40 Resin 50 Terminal 60 Junction 70, 80 Hole 100 Electrode terminal 110 Upper surface electrode 120 Lower surface electrode 140 First electrode terminal 150 Second electrode terminal 300 Lead frame 310 Mold portion 320 Vertical portion 500 Lead frame 510 Electrode terminals 520, 530 Tip

Claims (2)

A can having a resonator element inside and horizontally arranged in the axial direction;
A lead wire disposed at one end of the can and connected to the resonator element;
An electrode terminal connected to the lead wire;
A quartz resonator made of a resin covering the can, the lead wire and the electrode terminal,
The electrode terminal is formed integrally with the upper surface electrode via a bent portion with the upper surface electrode connected to the lead wire, and ends in the direction opposite to the axial direction and the direction of the end of the upper surface electrode Is disposed and has a lower surface electrode provided on the bottom of the resin,
The bottom of the can is disposed on the bottom of the resin ,
The back surface of the bottom electrode is disposed at the corner of the bottom of the resin;
The pair of lower surface electrodes are formed on the lead wire side of the resin, the back surface of one of the lower surface electrodes is disposed at one corner of the bottom portion of the resin, and the back surface of the other lower surface electrode is disposed on the bottom portion of the resin. Placed on the other corner,
One end is disposed on the bottom surface of the resin on the side opposite to the lead wire side, and the other end has a terminal disposed substantially perpendicular to the one end and spaced from the can,
Of the bottom and top of the resin, at the location where the head of the can is disposed, there is a hole for inserting a positioning pin during the injection molding of the resin,
A crystal resonator having a junction provided between the bottom electrode and the can in the bottom of the resin . A can having a resonator element inside and horizontally arranged in the axial direction;
A lead wire disposed at one end of the can and connected to the resonator element;
An electrode terminal connected to the lead wire;
A quartz resonator made of a resin covering the can, the lead wire and the electrode terminal,
The electrode terminal is formed integrally with the upper surface electrode via a bent portion with the upper surface electrode connected to the lead wire, and ends in the direction opposite to the axial direction and the direction of the end of the upper surface electrode Is disposed and has a lower surface electrode provided on the bottom of the resin,
The bottom of the can is disposed on the bottom of the resin ,
The electrode terminal has a bent portion between the upper surface electrode and the lower surface electrode, the upper surface electrode extends substantially perpendicularly to the bent portion from one end side of the bent portion, and the upper surface electrode from the other end side. The bottom electrode extends substantially perpendicular to the bent portion in the opposite direction,
One end is disposed on the bottom surface of the resin on the side opposite to the lead wire side, and the other end has a terminal disposed substantially perpendicular to the one end and spaced from the can,
Of the bottom and top of the resin, at the location where the head of the can is disposed, there is a hole for inserting a positioning pin during the injection molding of the resin,
A crystal resonator having a junction provided between the bottom electrode and the can in the bottom of the resin .

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