JP2000286661A - Surface mount electronic parts - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a surface mount electronic parts which can reduce its manufacturing process, can simplify its production and accordingly can reduce the unit price of the electronic parts by applying an insulating material on at least the entire back of a base. SOLUTION: A piezoelectric vibrator consists of a metallic base 1 and a metallic cover, and a piezoelectric element plate (crystal vibrator piece) is fixed at one of both ends of a lead terminal 2 attached to the base 1 with the form of the surface mount terminal 2 that is folded almost vertically in the opposite direction constructed on the bottom surface at the other end respectively. Then an insulating material 3 is applied on at least the entire surface of the base 1 in place of an insulating plate. In this example, the base 1 is bonded to the cover by welding to secure a very high quality standard for the sealing of the vibrator itself. Thus, it is possible to reduce the material cost of the insulating plate itself and also the manufacturing process where the terminal 2 is pierced through the insulating plate for simplifying the production job of a surface mounting type electronic part and to reduce the unit price of the electronic parts.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mounting structure of a quartz oscillator or a piezoelectric oscillator, and more particularly to a base structure of a resonator which further simplifies a conventional surface mount type and reduces the product price.

[0002]

2. Description of the Related Art Small-sized and surface-mountable piezoelectric vibrators are widely used in portable telephones, mobile communication devices, and other small electronic devices having an arithmetic function, which are very commonly used today. For example, as a vibrator of the prior art, actual
Japanese Unexamined Patent Application Publication No. 2260 (Japanese Utility Model Application Laid-Open No. 59-72032: our application) has a structure disclosed in Japanese Patent Application Publication No. 59-72032. This is Figure 3
As shown in (a) and (b), there is provided a single insulating plate provided with a pair of holes through which a pair of lead terminals vertically planted on the bottom surface of the piezoelectric vibrator penetrates. A groove is formed in the lower surface in advance, and the lead terminal is bent along the groove.

In each of these structures, the lead terminals are arranged so as to contact the printed electrode surface of the printed circuit board, and are mounted on the printed circuit board by welding to the printed electrode surface by solder flow processing. You.

[0004]

SUMMARY OF THE INVENTION The above-mentioned actual fairness 1-2
Although the one disclosed in Japanese Patent No. 2260 is most widely used, since it is necessary to insert lead terminals into holes in the insulating plate or bend the inserted lead terminals, the material cost of the insulating plate and the manufacturing process are required. Processing costs such as (insertion processing) also occur.

[0005]

SUMMARY OF THE INVENTION The present invention relates to a surface mount type piezoelectric vibrator comprising: a lead terminal implanted substantially perpendicularly to a base bottom surface; and a lead terminal bent substantially perpendicularly to the bottom surface in a facing direction. A surface-mounted piezoelectric vibrator is characterized in that an insulating material is applied to at least the entire back surface of the base.

In short, in a lead terminal implanted substantially vertically on the bottom surface and a surface mount type piezoelectric vibrator in which the lead terminal is bent substantially perpendicular to the bottom surface in a facing direction, an insulating material is provided on at least the entire back surface of the base. By applying
The coating (film) of the insulating material is the same as that of the above-mentioned actual article 1-222.
By playing the role of the insulating plate shown in Japanese Patent Publication No. 60, a structure in which the bottom surface of the metal base does not directly contact the lead terminals can be obtained, and a vibrator having a surface mount type that has been widely used in the past can be obtained. it can.

[0007]

The most advantageous effect of the present invention is that the insulating material is applied to at least the entire back surface of the base, and the greatest advantage is that the insulating plate used in the conventional vibrator can be reduced. As a result, the material cost of the insulating plate itself and the manufacturing process of inserting the lead terminals through the insulating plate are reduced and the operation is simplified, so that the product unit price can be significantly reduced. Also, in the surface mount type package conventionally made of ceramic etc.,
In order to maintain the mechanical strength, a base thickness of 0.2 mm or more was usually required. However, according to the present invention, a metal base was used instead of a base material using ceramics or the like. It is possible to secure mechanical strength even at millimeters or less, combined with the reduction in the number of conventional insulating plates, and the piezoelectric vibrator has been made smaller (height direction) than the conventional product in the height direction of the vibrator. You can get a child.

As a matter of course, the base and the lid of the piezoelectric vibrator are also made of metal as in the case of the conventional product, and the portion where the lead terminal is implanted (the metal and the lead terminal lead-out portion) is provided with a glass hermetic seal. In addition, since the welding between the base and the lid is performed using a weld method, there is no change in the advantage that the hermetic sealing (airtight atmosphere) of the piezoelectric vibrator itself can be maintained at a very high level.

[0009]

Embodiments of the present invention will be described below with reference to the accompanying drawings. In each drawing, the same reference numeral indicates the same object. FIG. 1 is a side view showing one embodiment of the present invention, and FIG. 2 is an enlarged partial cross-sectional side view of the present invention. FIG. 1 is a side view of a lead terminal 2 implanted substantially perpendicularly to the bottom surface of a metal base 1 and a surface mount type piezoelectric vibrator formed by bending the lead terminal 2 substantially perpendicularly to the bottom surface of the metal base 1 in a facing direction. .

The piezoelectric vibrator comprises a metal base 1 and a metal lid. A piezoelectric element (a crystal vibrating piece) is fixed to one end of a lead terminal 2 implanted in the base, and the other end is substantially at the bottom. Surface mount type lead terminal 2 bent vertically in the opposite direction
Make up form. Since the metal base 1 and the metal lid are used, a welding method is used for joining the metal base 1 and the lead terminal 2 (the lead-out portion of the metal and the lead terminal) has a glass hermetic seal. Therefore, the hermeticity (airtight atmosphere) of the piezoelectric vibrator itself can be maintained at a very high level.

The feature of the present invention is that the above-described vibrator has the same functions and effects as the surface-mounted vibrator used in a wide range from the conventional one (Japanese Utility Model Publication No. 1-2260). The number of insulating plates used in conventional products is reduced. The present invention is characterized in that the insulating material 3 is applied to at least the entire back surface of the base portion instead of the insulating plate, and the type of the insulating material 3 used here is assumed to be resin, Teflon, and rubber. I have.

As shown in the enlarged partial sectional side view of FIG.
An insulating material 3 is provided on at least the entire back surface of the base of a lead terminal 2 implanted substantially perpendicularly to the base bottom surface and a surface mount type piezoelectric vibrator formed by bending the lead terminal 2 substantially perpendicularly to the bottom surface in a facing direction. It has been applied. in this case,
Since a weld is used for joining the base and lid,
Regarding the application of the insulating material 3, the insulating material 3 is not applied to the outer peripheral portion (weld portion) of the base.

In the embodiment of the present invention, a terminal structure (surface mounting type) of a package for accommodating a piezoelectric material (a quartz oscillator or a ceramic) such as a quartz oscillator or a quartz oscillator.
However, other general electronic components can also be used as the surface mount type storage package. There is no limitation on the number of lead terminals to be implanted on the bottom surface of the base, and the shape may be such that the end of the lead terminal (circuit board mounting surface) extends along the base.

[0014]

According to the present invention, by reducing the number of insulating plates of a conventional surface mount type vibrator, the material cost of the insulating plate itself and the manufacturing process of inserting lead terminals through the insulating plate can be reduced and the work can be reduced. The simplification can greatly reduce the product unit price. Also, by reducing the insulating plate of the conventional vibrator, the height direction of the vibrator can be made lower than that of the conventional product, and a surface-mounted electronic component that is more compact (height direction) can be obtained. By covering the entire base portion with an insulating material, the mechanical strength, particularly at the base of the lead terminal, can be enhanced.

[Brief description of the drawings]

FIG. 1 is a partially enlarged front view showing the configuration of a first embodiment of the present invention.

FIG. 2 is an enlarged sectional view showing the configuration of the first embodiment of the present invention.

3A and 3B show a conventional example, in which FIG. 3A is a partially enlarged front view, and FIG. 3B is a perspective view as viewed from the bottom.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Metal base 2 Lead terminal 3 Insulation material

Claims (3)

[Claims] 1. A piezoelectric component having lead terminals planted substantially vertically on a bottom surface of a base, wherein an insulating material is applied to at least the entire back surface of the base,
A piezoelectric component, wherein the lead terminal is bent substantially perpendicularly to the bottom surface of the base in a facing direction to form a surface mount type. 2. A surface mount type piezoelectric component comprising: a lead terminal implanted substantially vertically on a bottom surface of a base; and the terminal bent substantially perpendicularly to the bottom surface in a facing direction. A surface-mount type piezoelectric component characterized by being coated with. 3. A surface-mounted electronic component, wherein the insulating material according to claim 1 uses resin, Teflon (registered trademark), or a rubber agent.