JP2004055369A - Surface mount type airtight terminal and method of manufacturing the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve a problem that, in a conventional structure, it is needed to apply a secondary process such as formation of a lead terminal 2 by brazing or welding an electrode terminal 6, a parallel terminal 5 and a supporter 10 to one another. <P>SOLUTION: This surface-mounted airtight terminal is so structured that a lead terminal sealing part sealed by an insulating member is biased in either direction in the base long body direction, and both ends of the lead terminal is formed by bending them in parallel with the base bottom surface. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a surface-mounted airtight terminal and a method for manufacturing the same.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, quartz resonators have been used in various electronic devices as frequency and time reference sources. Recently, as with electronic components such as diodes and capacitors, miniaturization and surface mounting have been required. For example, a surface mounting type airtight terminal having a configuration disclosed in Japanese Patent Application Laid-Open No. 8-31481 has been proposed. .
[0003]
FIG. 4 is a cross-sectional view taken along a longitudinal center line of a conventional surface mount type hermetic terminal, where 101 is a metal base formed in a box shape, 102 is the bottom of the metal base 101, and 103 is formed on the bottom 102. Lead terminal through hole, 104 is a lead terminal, 105 is an upright terminal of the lead terminal 104, 106 is a parallel terminal of the lead terminal, 107 is an airtight space formed inside the metal base 101, 108 is a piezoelectric element, and 109 is a piezoelectric element. A supporter for holding the element, 110 is sealing glass, 111 is a lid fixed and sealed to the metal base 101, and 112 is a low-melting glass for bonding the metal base 101 and the lid 111.
[0004]
The detailed configuration will be described below. A lead terminal through hole 103 is provided in a bottom portion 102 of a metal base 101 made of Fe and an Fe-based alloy, and the lead terminal 104 has a two-part structure including an upright terminal 105 and a parallel terminal 106. The parallel terminal 106 and the supporter 109 are joined at predetermined locations by, for example, brazing, welding, or the like. A lead terminal 104 composed of an upright terminal 105 and a parallel terminal 106 is inserted through the lead terminal through hole 103 so as to penetrate an airtight space 107 formed inside the metal base 101, and is sealed with a sealing glass 110 to form a piezoelectric element. After the element 108 is mounted in the airtight space 107, the lid 111 is adhered and the piezoelectric element 108 is sealed. At this time, the metal base 101, the upright terminal 105 and the parallel terminal 106 of the lead terminal 104, and the supporter 109 are insulated by the sealing glass 110.
[0005]
[Problems to be solved by the invention]
In the above-described conventional configuration, it is conceivable that the degree of freedom in designing the lead terminal 104 may be increased by forming the lead terminal 104 into a two-part structure, but after the metal base 101 and the lead terminal 104 are sealed with the sealing glass 110, It is necessary to perform secondary processing such as brazing or welding the upright terminal 105, the parallel terminal 106, and the supporter 109 to form the lead terminal 104.
[0006]
The present invention solves the above-described problem. After sealing a metal base 101 and a lead terminal 104 with a sealing glass 110, a highly reliable surface mount type airtight terminal without performing secondary processing, and manufacturing thereof. The aim is to provide a method.
[0007]
[Means for Solving the Problems]
In order to solve the above-mentioned problems, a surface-mounted hermetic terminal according to the present invention has a base formed with a through-hole through which a lead terminal made of a metal plate is inserted, an insulating member for sealing the base and the lead terminal, and a cover for the base. In this case, both ends of the lead terminal are bent horizontally with respect to the bottom surface of the base.
[0008]
According to this, the lead terminals are preliminarily bent before being sealed by the insulating member, and there is no need to perform secondary processing of the supporter and the parallel terminals after the lead terminals are sealed. Further, the lead terminal sealing portion is deviated in the direction of the base body, so that the supporter and the parallel terminal can have a large area.
[0009]
Next, the manufacturing method of the present invention includes a step of inserting a lead terminal into a base having a through-hole formed therein, a step of inserting an insulating member into the through-hole, and a step of connecting the base and the lead terminal through the insulating member. And a step of inserting a bent lead terminal. The insulating member is formed in a shape without holes.
[0010]
According to this, after sealing with an insulating member, there is no need for secondary processing for forming a supporter and a parallel terminal, and mechanical and thermal shocks due to brazing, welding, etc. to the sealing portion. To prevent external stress.
[0011]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIG. 1A is a top view showing a surface-mounted hermetic terminal according to the present invention, and FIG. 1B is a cross-sectional view of FIG. 1A. 1A and 1B, reference numeral 1 denotes a metal base made of a metal plate material such as Fe or an Fe-based alloy, and 2 denotes a lead obtained by bending a metal plate such as an Fe-Ni-Co alloy in advance. Terminals 3 are through holes formed for inserting lead terminals 2 formed in the metal base 1, and 4 are airtightly and insulatively sealed between the metal base 1 and the lead terminals 2 inserted in the through holes 3. For example, sealing glass made of borosilicate glass, 5 is a parallel terminal which is one end of the lead terminal 2 exposed to the outside from the metal base 1, and 6 is a lead terminal 2 exposed to the inside from the metal base 1. One end is an electrode terminal, 7 is a piezoelectric element, 8 is a cover for covering the metal base 1, and 9 is a sealing portion.
[0012]
A lead terminal 2 formed by bending a metal plate such as an Fe—Ni—Co alloy in advance is inserted into a through hole 3 formed in the metal base 1, and the metal base 1 and the lead terminal 2 are sealed with sealing glass 4. Airtight and insulating sealing is performed with the through hole 3. At this time, the point different from the conventional example is that the sealing portion 9 of the lead terminal 2 sealed by the through hole 3 is deviated in the base long body direction. As shown in FIG. 1B, when the lead terminal 2 is sealed to the metal base 1 via the sealing glass 4, the sealing portion 9 of the lead terminal 2 is displaced in the longitudinal direction of the metal base 1. It is formed so that. Thereby, the area of the parallel terminal 5 used for mounting on the external substrate and the area of the electrode terminal 6 used as the supporter 10 can be secured large, the mounting on the external substrate is stabilized, and the connection to the supporter 10 is made. The connection with the electronic component, for example, the piezoelectric element 7 is stabilized, and a large area is secured. The electrode terminal 6 plays a role as a supporter. Next, description will be made with reference to FIG. 2 which is a top view and FIG. 3 which is a cross-sectional view showing the steps of the embodiment of the method for manufacturing a surface-mounted hermetic terminal. A through hole 3 formed in a metal base 1 made of a metal plate material such as Fe or an Fe-based alloy has a lead terminal 2 formed by bending a metal plate such as an Fe-Ni-Co alloy in advance, and a sealing formed in a holeless shape. The glass 4 is inserted (FIGS. 2A and 3A). Next, after melting the sealing glass 4 at a high temperature of 900 to 1000 ° C., the sealing glass 4 is cooled, and the metal base 1 and the lead terminal 2 are bonded via the sealing glass 4 (FIG. 2B, FIG. 3). (B)). Next, a functional plating such as Ni or Au is appropriately performed, and the piezoelectric element 7 is bonded to the supporter 10 formed on the electrode terminal 6 (FIGS. 2C and 3C). Next, the metal base 1 and the lid 8 are brazed or welded (FIGS. 2D and 3D). Accordingly, both ends of the lead terminal 2 can be bent in advance, and the lead terminal 2 needs to be subjected to secondary processing such as brazing or welding the parallel terminal 5 and the electrode terminal 6 after sealing the lead terminal 2. Disappears. Furthermore, by making the sealing glass 4 into a shape without holes, the shape of the lead terminal 2 can be freely set.
[0013]
As described above, one embodiment of the surface-mounted hermetic terminal and the method of manufacturing the same according to the present invention have been described. However, the terminal can be appropriately changed without departing from the spirit of the present invention.
[0014]
【The invention's effect】
As described above, according to the surface mount type airtight terminal of the present invention, when the lead terminal 2 is sealed to the metal base 1 via the sealing glass, the sealing portion of the lead terminal 2 is fixed to the length of the metal base 1. It is formed so as to be deviated in the trunk direction. Thereby, the area of the parallel terminal 5 used for mounting on the external substrate and the area of the electrode terminal 6 used as the supporter can be secured large, the mounting on the external substrate is stabilized, and the electronic components connected to the supporter can be secured. For example, the connection with the piezoelectric element is stabilized, and a large area is secured, so that the electrode terminal 6 can serve as a supporter.
[0015]
Further, according to the manufacturing method of the present invention, it is not necessary to perform secondary processing on the lead terminal 2 such as brazing or welding the parallel terminal 5 and the electrode terminal 6 after the lead terminal 2 is sealed. Furthermore, by making the sealing glass 4 into a shape without holes, the shape of the lead terminal 2 can be freely set.
[Brief description of the drawings]
FIG. 1 shows a surface-mounted hermetic terminal according to an embodiment of the present invention.
FIG. 2A is a top view, and FIG. 2B is a cross-sectional view. FIG. 2 is a top view along a manufacturing process flow of a surface-mounted hermetic terminal according to an embodiment of the present invention. FIG. Sectional view along the manufacturing process flow of the mold airtight terminal [Figure 4] Sectional view of conventional example [Description of reference numerals]
REFERENCE SIGNS LIST 1 metal base 2 lead terminal 3 through hole 4 sealing glass 5 parallel terminal 6 electrode terminal 7 piezoelectric element 8 lid 9 sealing portion 10 supporter 101 metal base 102 bottom 103 through hole 104 lead terminal 105 upright terminal 106 parallel terminal 107 airtight Space 108 piezoelectric element 109 supporter 110 sealing glass 111 lid 112 low melting glass

Claims (6)

A base formed with a through-hole through which a lead terminal made of a metal plate is inserted, an insulating member for sealing the base and the lead terminal, and a lid hermetically sealed to cover the base; A surface-mounted airtight terminal, wherein both ends of the terminal are bent in a horizontal direction with respect to the bottom surface of the base. One end covered by the lid of the lead terminal is an internal terminal, the opposite end of the internal terminal is an external terminal, and either one or both ends of the internal terminal and the external terminal have an end. 2. The surface mount type airtight terminal according to claim 1, wherein the terminal is formed to be larger than the outer diameter of the lead terminal sealing portion. The surface-mounted airtight terminal according to claim 1, wherein the lead terminal sealing portion sealed with the insulating member is biased in the through hole. A step of inserting a lead terminal into a base having a through hole, a step of inserting an insulating member into the through hole, and a step of sealing the base and the lead terminal via the insulating member. Characteristic method of manufacturing surface-mounted airtight terminals. Inserting a bent lead terminal into a base having a through-hole formed therein, inserting an insulating member into the through-hole, and sealing the base and the lead terminal through the insulating member. A method for manufacturing a surface-mounted airtight terminal, comprising: 6. The method according to claim 5, wherein a through hole through which the lead terminal is inserted is not formed in the insulating member.

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