JP2007328941A - Method of manufacturing airtight terminal with plated coat - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method of manufacturing an airtight terminal with a plated coat wherein occurrence of defective plating and defective bending of a rod-shaped electrode terminal can be reduced, the plated coat having a uniform thickness can be formed, manufacturing processes are simple, and selection of materials used is easy. <P>SOLUTION: This method of manufacturing the airtight terminal with the plated coat includes a process to prepare the airtight terminal in which two rod-shaped electrode terminals each having a relatively short upper side and a relatively long lower side are supported and fixed through an insulating material with a space kept between them in the inside of a metal ring, a process to manufacture the airtight terminals the both terminals of which are connected by a curing resin lump by making a UV-curing resin adhere to the end parts of the lower sides of the respective rod-shaped electrode terminals or the vicinity of them so as to connect both terminals each other and then curing the resin by irradiating ultraviolet rays, a process to form the plated coat on the exposed part of the surface of the metal ring and the respective rod-shaped electrode terminals by a barrel plating method, and a process to cut and remove the portions of both terminals connected by the curing resin lump together with the curing resin lump respectively. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a method of manufacturing an airtight terminal with a plating film using a barrel plating method.

  Conventionally, it is known that an electronic component typified by a crystal resonator is housed in an airtight container in order to operate stably against changes in environmental conditions (eg, temperature, humidity, etc.).

  Such an airtight container is formed by supporting and fixing two rod-shaped electrode terminals, which are relatively short on the upper side and relatively long on the lower side, with an interval between each other, with an insulating material inside the metal ring. An airtight terminal and a metal cap provided with an opening into which a metal ring of the airtight terminal is press-fitted.

  A plating film (eg, a tin-lead alloy thin film) is formed on the surface of the metal ring of such an airtight terminal and the surface of each rod-shaped electrode terminal. An electronic component is fixed to the upper end of the two rod-shaped electrode terminals of the hermetic terminal by soldering with a plating film, and then a metal ring is press-fitted into the opening of the metal cap, whereby the hermetic container An electronic component is accommodated in the container. The plating film of the metal ring functions as a sealing material for improving the airtightness between the press-fitted metal ring and the metal cap.

  It is necessary to form a plating film with a predetermined thickness (for example, about 9 to 17 μm) on the metal ring of the airtight terminal and each rod-shaped electrode terminal. On the other hand, there are airtight terminals for small electronic components typified by a crystal resonator of a mobile phone, in which the interval between two rod-shaped electrode terminals is set to about 0.1 to 0.2 mm. In this case, if the plating film of the rod-shaped electrode terminal is too thick, the plating film heated and melted when fixing the crystal unit may electrically short-circuit the two rod-shaped electrode terminals. In addition, the plating film of the metal ring must have a thickness of a certain level or more in order to sufficiently function as a sealing material that enhances the airtightness between the press-fitted metal ring and the metal cap. It is.

  The plating film of the hermetic terminal is generally formed by barrel plating. In the barrel plating method, a large amount of target articles (for example, airtight terminals) for forming a plating film are accommodated in a hollow container called a barrel in which a large number of through holes are formed, and this is immersed in a plating solution and rotated. This is a method for efficiently plating a large number of articles. An electrode for plating is installed inside the barrel. When the target article rotates and moves with the barrel and comes into contact with the electrode for plating, the metal ions in the plating solution adhere to the target article and the plating film is formed. It is formed.

Patent Document 1 discloses a method for manufacturing an airtight terminal (electronic component) including two rod-shaped electrode terminals (leads). In this manufacturing method, by using an airtight terminal in which two rod-shaped electrode terminals are fixed and short-circuited with each other with a conductive material, the rod-shaped electrode terminal of the airtight terminal rotating inside the barrel is replaced with two rod-shaped electrodes of another airtight terminal. Since it becomes difficult to penetrate between the terminals, it is said that the rate of occurrence of defective plating or bending of the rod-shaped electrode (defective) caused by entanglement between the rod-shaped electrode terminals can be reduced. Further, since the two rod-shaped electrode terminals are electrically short-circuited to each other by the conductive material, it is said that plating films having a uniform thickness can be formed on each rod-shaped electrode terminal. As the conductive material, for example, a low melting point metal such as a tin-lead alloy is used. And since a plating solution is heated when forming a plating film by a barrel plating method, as said low melting metal, what has melting | fusing point higher than the heating temperature of a plating solution is desirable.
JP 2001-267190 A

  By using the manufacturing method of the above-mentioned Patent Document 1, it is possible to reduce the occurrence rate of plating failure and bending failure of the rod-shaped electrode terminal when forming a plating film on the airtight terminal by barrel plating, and each rod-shaped electrode Plating films having a uniform thickness can be formed on the terminals.

  However, this manufacturing method requires a laborious process involving heat treatment, in which a low melting point metal used as a conductive material is heated and melted and adhered to the two rod-shaped electrode terminals of the airtight terminal. Further, when the set temperature of the plating solution (or heat drying after plating) is changed, it may be necessary to change the low melting point metal used as the conductive material to one having an appropriate melting point.

  It is an object of the present invention to suppress the occurrence of defective plating or bending of a rod-shaped electrode terminal, and can form a plating film with a uniform thickness on each of the metal ring and each rod-shaped electrode terminal. It is an object of the present invention to provide a method for manufacturing an airtight terminal with a plating film, which is simple in process and easy to select a material to be used.

This invention exists in the manufacturing method of the airtight terminal with a plating film including the following processes.
(1) Inside the metal ring, there is prepared an airtight terminal in which two rod-like electrode terminals that are relatively short on the upper side and relatively long on the lower side are supported and fixed with an interval through an insulating material The process of
(2) An ultraviolet curable resin is attached to the lower end of each rod-like electrode terminal or in the vicinity thereof so that both terminals are connected to each other, and then the resin is cured by irradiation of ultraviolet rays so that both terminals are A step of producing an airtight terminal with a cured resin block connected by a cured resin block,
(3) a step of forming a plating film by barrel plating on the metal ring of the airtight terminal with a cured resin mass and the surface of each rod-shaped electrode terminal, and (4) a cured resin mass of two rod-shaped electrode terminals. A step of cutting and removing the portions connected together with the cured resin block.

  In the manufacturing method of this invention, it is preferable that the thickness of the direction perpendicular | vertical to the plane containing the said 2 rod-shaped electrode terminal of the cured resin lump is larger than the space | interval of the lower part of both terminals.

  The present invention also provides an airtight terminal in which two rod-like electrode terminals, each of which is relatively short on the upper side and relatively long on the lower side, are supported and fixed to each other via an insulating material inside the metal ring. There is also a hermetic terminal with a cured resin lump composed of a cured resin lump formed by curing an ultraviolet curable resin, in which the lower end portions or the vicinity thereof are connected to each other.

  In the airtight terminal with a cured resin mass of the present invention, it is preferable that the thickness of the cured resin mass in the direction perpendicular to the plane including the two rod-shaped electrode terminals is larger than the interval between the lower portions of both terminals.

  In the production method of the present invention, the plating is formed by forming a plating film on the surface of an airtight terminal (airtight terminal with a cured resin lump) in which two rod-shaped electrode terminals are connected to each other by a cured resin lump by barrel plating. An airtight terminal with a coating is produced. By connecting the two rod-shaped electrode terminals to each other with the cured resin mass in this way, it is difficult for another rod-shaped electrode terminal of another hermetic terminal to enter between the two rod-shaped electrode terminals of each hermetic terminal in the plating solution. (That is, it becomes difficult for the rod-shaped electrode terminals to be entangled with each other), and since the fixation of the two rod-shaped electrode terminals is reinforced by being connected with a cured resin lump, the occurrence of defective plating or defective bending of the rod-shaped electrode terminals It is suppressed.

  Further, in the manufacturing method of the present invention, the two rod-shaped electrode terminals of the airtight terminal are connected in a state of being electrically insulated from each other by the cured resin lump, and are attached to the surface of the metal ring and each rod-shaped electrode terminal. Since a plating film is formed independently of each other when contacting each of the plating electrodes, a plating film having a uniform thickness is formed on each of the metal ring of the hermetic terminal and each rod-shaped electrode terminal.

  The hermetic terminal with a cured resin mass of the present invention can be produced in a short time by a simple operation using an ultraviolet curable resin without heat treatment. In addition, the material of the cured resin lump provided in the airtight terminal with the cured resin lump can be easily selected from known UV curable resins without being particularly aware of the set temperature of the plating solution (or heat drying after plating). Can do. Thus, the manufacturing method of the present invention has a simple manufacturing process and easy selection of materials to be used.

  First, a hermetic terminal used in the manufacturing method of the present invention will be described by taking a hermetic terminal for a small electronic component typified by a crystal resonator of a portable phone as an example.

  FIG. 1 is a plan view showing a configuration example of a hermetic terminal used in the manufacturing method of the present invention, and FIG. 2 is a cross-sectional view of the hermetic terminal 10 cut along a cutting line II-II written in FIG. It is.

  The airtight terminal 10 shown in FIGS. 1 and 2 has a relatively short upper side (portion protruding above the metal ring) inside the metal ring 21 and a lower side (below the metal ring). Two rod-like electrode terminals 22, 22 having a relatively long portion) are supported and fixed with an interval through an insulating material 23.

  For example, the outer diameter of the metal ring 21 is set to 0.92 mm, the inner diameter (opening diameter) of the upper end is set to 0.69 mm, and the height is set to 0.8 mm.

  The metal ring 21 is made of, for example, a metal material such as iron-nickel alloy, iron-nickel-cobalt alloy (Kovar), or iron.

  For example, the diameter of the rod-shaped electrode terminal 22 is set to 0.15 mm. And the space | interval of the two rod-shaped electrode terminals 22 and 22 is set to 0.15 mm, for example.

  The rod-shaped electrode terminal 22 is made of, for example, a metal material such as an iron-nickel alloy or an iron-nickel-cobalt alloy.

  Examples of the insulating material 23 include inorganic glass materials such as soda lime glass, soda barium glass, and borosilicate glass.

  Next, the manufacturing method of the airtight terminal with a plating film of this invention is demonstrated. The manufacturing method of the airtight terminal with a plating film of this invention consists of implementing the process of following (1)-(4) in order.

(1) First, as shown in FIG. 1 and FIG. 2, two rod-like electrode terminals 22, 22 on the inner side of the metal ring 21 are relatively short on the upper side and relatively long on the lower side, An airtight terminal 10 is prepared, which is supported and fixed at intervals through an insulating material 23.
As the airtight terminal, known various sizes of airtight terminals (including those having two or more rod-shaped electrode terminals) can be used. The manufacturing method of the hermetic terminal is described in detail in, for example, Patent Document 1 described above.

  (2) Next, an ultraviolet curable resin is attached to the lower end of each rod-like electrode terminal 22 so that both terminals are connected to each other, and then the resin is cured by irradiation with ultraviolet rays. As shown in the cross-sectional view of FIG. 3A and the side view of FIG. 4, the airtight terminal 11 with a cured resin mass in which both terminals are connected by a cured resin mass 24 is produced.

  The hermetic terminal 11 with the cured resin block is manufactured using, for example, the following apparatus.

  FIG. 5 is a diagram illustrating an example of an apparatus used for manufacturing the airtight terminal 11 with the cured resin block. The apparatus shown in FIG. 5 includes a tray 51 containing an ultraviolet curable resin 26, a pump 52 for supplying the ultraviolet curable resin 26 to the tray 51, and a large number of through holes. The airtight terminal 10 is provided inside each through hole. It is comprised from the support tool 53 which accommodates and supports.

  The tray 51 is filled with the ultraviolet curable resin 26 until, for example, the depth of each electrode terminal 22 to which the ultraviolet curable resin is attached is approximately equal to the length (FIG. 3A: h).

  First, the hermetic terminal 10 is accommodated and held in each of the through holes of the support tool 53 of the apparatus shown in FIG. 5, and then the lower end of each rod-shaped electrode terminal 22 of each hermetic terminal 10 and the vicinity thereof are supported by 53 is lowered and immersed in the ultraviolet curable resin 26, and then the support 53 is raised and taken out. Thereby, the ultraviolet curable resin 26 adheres to the lower end portion (and the vicinity thereof) of the rod-shaped electrode terminal 22 of each hermetic terminal 10 so as to connect the two terminals to each other. The support 53 is moved to another location together with the airtight terminal to which the ultraviolet curable resin is attached, and the ultraviolet curable resin attached to each of the airtight terminals is irradiated with ultraviolet rays from below the support.

  In this way, the two rod-like electrode terminals 22, 22 that are relatively short on the upper side and relatively long on the lower side are supported and fixed to each other via the insulating material 23 inside the metal ring 21. The airtight terminal 10 is connected to the lower end (and the vicinity thereof) of each rod-like electrode terminal 22, and a cured resin mass 24 formed by curing an ultraviolet curable resin. The airtight terminal 11 with a cured resin lump can be produced.

  Although depending on the wavelength and intensity of the ultraviolet rays to be irradiated, by irradiating the ultraviolet curable resin attached to each rod-shaped electrode terminal of the hermetic terminal with ultraviolet rays, the ultraviolet curable resin can be removed in a short time of about 5 to 60 seconds. And cured to form a cured resin mass. In addition, when ultraviolet irradiation is performed in an inert gas (eg, nitrogen gas, argon gas), contact between the ultraviolet curable resin and oxygen that hinders its curing is prevented, so that a cured resin lump is formed. Can be performed in about half of the above time. Moreover, the ultraviolet curable resin used as the material of the cured resin lump can be easily selected from known ultraviolet curable resins without being particularly aware of the set temperature of the plating solution (or heat drying after plating). .

  In addition, when a thermosetting resin is used to connect the two rod-shaped electrodes of the airtight terminal to each other, although depending on the heating temperature, in order to cure the resin adhering to both terminals, approximately 5 to Since a long heat treatment of 30 minutes is required, it is difficult to obtain a practical productivity of an airtight terminal with a plating film.

  FIG. 6 is a diagram illustrating another example of an apparatus used for manufacturing the airtight terminal 11 with a cured resin block. The apparatus shown in FIG. 6 includes a container 62 containing an ultraviolet curable resin 26, a tray 61 installed above the container 62, a pump 52 for supplying the tray 61 with the ultraviolet curable resin 26 contained in the container 62, and a tray 61. Are provided with a plurality of through-holes, a long supporting and conveying tool 63 for receiving and supporting the hermetic terminal 10 inside each through-hole, and an ultraviolet lamp 64.

  Then, when the hermetic terminal 10 is first transported in the direction indicated by the arrow shown in the drawing by the support and transport tool 63 of the apparatus of FIG. 6, the lower end of each rod-like electrode terminal 22 of each hermetic terminal 10 and its vicinity are The ultraviolet curable resin is taken out after being immersed in the ultraviolet curable resin 26 supplied to the tray 61 and is connected to the lower end (and the vicinity thereof) of each rod-shaped electrode terminal 22. The airtight terminal 13 to which 26 is attached is produced. The hermetic terminal 13 is conveyed above the ultraviolet lamp 64 by the support conveyance tool 63, and ultraviolet rays are irradiated to the ultraviolet curable resin attached to each rod-shaped electrode terminal. In this way, the airtight terminal 11 with the cured resin mass is produced in which the respective rod-like electrode terminals 22 are connected to each other by the cured resin mass 24. The apparatus shown in FIG. 6 can be advantageously used when mass-producing airtight terminals with a cured resin mass.

(3) Next, a plating film is formed by barrel plating on the exposed portion of the metal ring of the airtight terminal with the cured resin block and the surface of each rod-shaped electrode terminal.
FIG. 3B is a cross-sectional view of an airtight terminal with a cured resin lump on which the plating film 25 is formed. Thus, the plating film (typical example, tin-lead alloy film) 25 is formed on the exposed portions of the surfaces of the metal ring 21 and the rod-shaped electrode terminals 22 of the airtight terminal with the cured resin block.

  In the barrel plating method, as described above, a large number of target articles for forming a plating film are formed in a hollow container called a barrel in which a large number of through holes are formed (for example, several thousand to several hundreds of thousands of hermetic terminals). This is a method for efficiently plating a large number of articles by housing and immersing it in a plating solution and rotating it. An electrode for plating is installed inside the barrel. When the target article rotates and moves with the barrel and comes into contact with the electrode for plating, the metal ions in the plating solution adhere to the target article and the plating film is formed. It is formed. The barrel plating method is a technique that is widely known as a method suitable for mass production of articles having a small-sized plating film, and detailed description thereof is omitted.

  According to the manufacturing method of the present invention, when a plating film (typically, a tin-lead alloy film) is formed on the surface of an airtight terminal with a cured resin mass by barrel plating, the two rod-shaped electrode terminals of the airtight terminal are cured resin mass. They are connected to each other, making it difficult for another airtight terminal rod-shaped electrode terminal to penetrate between the two rod-shaped electrode terminals for each airtight terminal in the plating solution (hardening the rod-shaped electrode terminals to become entangled) and hardening. Since the two bar-shaped electrode terminals are reinforced by being connected by the resin block, it is possible to reduce the occurrence of defective plating and bending defects of the bar-shaped electrode terminals.

  As shown in FIG. 3A and FIG. 4, in the airtight terminal 11 with the cured resin mass, the thickness (t of the cured resin mass 24 in a direction perpendicular to the plane including the two rod-shaped electrode terminals 22, 22. ) Is preferably larger than the interval (w) between the lower portions of both electrode terminals. This is because the rod-shaped electrode terminal of another hermetic terminal is more difficult to enter between the two rod-shaped electrode terminals of each hermetic terminal in the plating solution.

  The thickness (t) of the cured resin mass is, for example, the selection of an ultraviolet curable resin used when producing an airtight terminal with the cured resin mass (for example, a material having a different surface tension or viscosity) or a rod-like shape as described above. The lower end of the electrode terminal and the vicinity thereof can be easily adjusted by the speed at which the electrode terminal is taken out after being immersed in the ultraviolet curable resin.

  Furthermore, by using the manufacturing method of the present invention, it is possible to form plating films having uniform thicknesses on the metal ring of the hermetic terminal and the rod-shaped electrode terminals.

  For example, as described in the above-mentioned Patent Document 1, when two rod-shaped electrode terminals are connected to each other with a conductive material, any rod-shaped electrode is used as an electrode for plating when a plating film is formed by a barrel plating method. Even if the terminals are in contact, plating films are formed on the surfaces of both terminals. For this reason, although a plating film having a uniform thickness is formed on each rod-shaped electrode terminal, the plating film tends to be formed on each rod-shaped electrode terminal with a thickness greater than that of the metal ring.

  On the other hand, in the manufacturing method of the present invention, a metal ring is used because an airtight terminal with a cured resin lump in which two rod-like electrode terminals are connected in a state of being electrically insulated from each other by a cured resin lump. In addition, a plating film is formed on the surface of each rod-like electrode terminal independently of each other when each electrode contacts the plating electrode. For this reason, it is possible to form a plating film having a uniform thickness on the metal ring and each rod-like electrode terminal.

Examples of the plating film formed on the airtight terminal include metal films such as a nickel film and a gold film in addition to the above tin-lead alloy film. A nickel coating or a gold coating is used as a coating for rust prevention of an airtight terminal.
(4) Finally, the portions of the two rod electrode terminals connected by the cured resin mass are cut and removed together with the cured resin mass.
Thus, the airtight terminal 12 with a plating film shown in FIG.3 (c) can be produced.

  As described above, by using the manufacturing method of the present invention, it is possible to suppress the occurrence of plating failure and bending failure of the rod-shaped electrode terminal, and the plating film having a uniform thickness on each of the metal ring and each rod-shaped electrode terminal. Can be formed. Further, the production method of the present invention has an advantage that the production process is simple and the selection of the material to be used is easy.

It is a top view which shows the structural example of the airtight terminal used for the manufacturing method of this invention. It is sectional drawing of the airtight terminal 10 cut | disconnected along the cutting line II-II line entered in FIG. It is a figure used in order to explain each process of the manufacturing method of the present invention. (A) is a cross-sectional view of a hermetic terminal with a cured resin lump, (b) is a cross-sectional view of a hermetic terminal with a cured resin lump on which a plating film is formed, and (c) is a cross-sectional view of a hermetic terminal with a plating film. It is. It is the side view which looked at the airtight terminal with the cured resin lump shown to Fig.3 (a) from the right side of the figure. It is a figure which shows an example of the apparatus used for preparation of the airtight terminal with the cured resin lump used in the manufacturing method of this invention. It is a figure which shows another example of the apparatus used for preparation of the airtight terminal with the cured resin lump used in the manufacturing method of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Airtight terminal 11 Airtight terminal with hardening resin lump 12 Airtight terminal with plating film 13 Airtight terminal to which ultraviolet curable resin adhered 21 Metal ring 22 Rod-shaped electrode terminal 23 Insulating material 24 Cured resin lump 25 Plating film 26 UV curable resin 51 Tray 52 Pump 53 Supporting tool 61 Tray 62 Container 63 Supporting conveying tool 64 UV lamp

Claims (4)

Manufacturing method of airtight terminal with plating film including the following steps:
(1) Inside the metal ring, there is prepared an airtight terminal in which two rod-like electrode terminals that are relatively short on the upper side and relatively long on the lower side are supported and fixed with an interval through an insulating material The step of:
(2) An ultraviolet curable resin is attached to the lower end of each rod-like electrode terminal or in the vicinity thereof so that both terminals are connected to each other, and then the resin is cured by irradiating with ultraviolet rays so that both terminals are Producing a hermetic terminal with a cured resin mass connected by a cured resin mass;
(3) a step of forming a plating film by barrel plating on the metal ring of the hermetic terminal with a cured resin mass and the surface of each rod-shaped electrode terminal; and (4) a cured resin mass of two rod-shaped electrode terminals. A step of cutting and removing the portions connected together with the cured resin block.   The manufacturing method of the airtight terminal with a plating film of Claim 1 whose thickness of the direction perpendicular | vertical to the plane containing the said 2 rod-shaped electrode terminal of the cured resin lump is larger than the space | interval of the lower part of both terminals.   An airtight terminal in which two rod-like electrode terminals, which are relatively short on the upper side and relatively long on the lower side, are supported and fixed with an interval between each other inside the metal ring, and each rod-like electrode An airtight terminal with a cured resin lump comprising a cured resin lump formed by curing an ultraviolet curable resin, the lower end of the terminal or the vicinity thereof being connected to each other.   The airtight terminal with a cured resin lump according to claim 3, wherein a thickness of the cured resin lump in a direction perpendicular to a plane including the two rod-shaped electrode terminals is larger than a distance between lower portions of both terminals.

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