JP2010179354A - Lid tacking method and device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To tack a lid to a container while holding the lid by a suction nozzle even if the lid is small. <P>SOLUTION: A lid tacking method and a device therefor are used for tacking the lid to the container by spot-welding. At least an action end vicinity 7A sucks and holds the lid 10 by the suction nozzle 7 having a laser beam transmission property. The lid 10 held by the suction nozzle 7 is positioned and placed on the opening of the container 11. In the state that the suction nozzle 7 biases the lid 10 to the direction of the container 11, the lid 10 can be tacked to the container 11 by irradiating the lid 10 with laser beam transmitted through the action end vicinity 7A. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

In the present invention, in advance of a sealing operation for hermetically sealing the container by bonding a lid, which is a lid, to the opening of the container containing electronic components such as a crystal resonator and a surface acoustic wave filter. The present invention relates to a method and an apparatus for temporarily fixing the opening of the container and the lid.

Conventionally, a micro-parallel seam bonding method has been widely used as a method for hermetically sealing electronic components such as a crystal resonator and a surface acoustic wave filter in a container. FIG. 5 is a cross-sectional view of a conventional container with a seal ring. First, an electronic component 54 such as a crystal resonator is housed in a container 53 formed by brazing a metal seal ring 52 to a ceramic substrate 51. A component 54 that is electrically connected to the outer lead 56 by a wire 55 is prepared. A lid 57 made of Kovar or the like is positioned and placed in the opening of the container 53.

  At this time, when the positioned lid 57 is joined to the opening of the container 53 by some external force, for example, when joining is seam welding, the roller electrode contacts to start joining. May be misaligned. In order to avoid this, the lid 57 is usually temporarily fixed to the periphery of the opening of the container 53 by spot bonding. A temporary fixing device that places the lid 57 on the container 53 and performs spot bonding in this manner is disclosed in Patent Document 1.

  The lid temporary fixing device disclosed in Patent Document 1 will be described with reference to FIG. In FIG. 6, reference numeral 58 denotes a suction nozzle, which is connected to an exhaust means (not shown), and holds the lid 57 at the tip by suction due to its negative pressure. Reference numeral 59 denotes a pair of electrodes that move down in conjunction with the suction nozzle 58, and first the lid 57 comes into contact with the opening on the upper surface of the container 53. Here, the lowering operation of the suction nozzle 58 is stopped, but the operation of urging the lid 57 downward together with the suction operation is maintained, and the displacement of the lid 57 is prevented. On the other hand, the pair of electrodes 59 continues to move downward, and is brought into contact with the lid 57 placed on the container 53 and energized, thereby performing temporary fixing (spot bonding) using the resistance heat generation.

  Here, even if the pair of electrodes 59 has a simple rod shape, it serves a certain purpose. However, since the same portion is always in contact with the lid 57, the adhesion and wear of foreign substances concentrate on the action portion, and the life as an electrode is increased. It will be short. Therefore, conventionally, as shown in FIG. 7, a structure in which a pair of tapered roller electrodes 60 are provided as electrodes and the suction nozzle 61 is disposed in the gap has been adopted. If such an electrode is used, the entire circumference of the roller part can be used as an action part in contact with the lid by rotating the roller by a small angle every time a certain number of spot joinings are performed, so the frequency of electrode replacement is drastically reduced. . This rotation at a very small angle can be easily automated if the roller electrode 60 is moved away from the lid so as to come into contact with an appropriate other fixing member and the roller is rotated by the frictional force. .

  In recent years, the size of containers has been reduced due to the demand for high-density mounting, and the size has been reduced to about 1.6 × 0.8 mm when viewed from above. For this reason, it is necessary to devise to reduce the interval between the roller electrodes while arranging the suction nozzle in the gap between the pair of roller electrodes. Although the same as that shown in FIG. 7, a technique has been disclosed in which spot diagonal bonding is performed on the opposite sides of the rectangular lid rather than the substantially central portion, and an attempt is made to cope with a small container as much as possible.

Further, Patent Document 3 uses a suction nozzle having a tapered side surface in the vicinity of the lower end, which is the working end (suction end), and rotates the roller electrode at an angle along the taper of the suction nozzle. A technique for holding freely is disclosed. This is a device in which the mechanical strength of the entire suction nozzle is ensured and the air resistance is reduced by shortening the small diameter portion of the air flow path inside the suction nozzle to ensure the suction force (Fig. 8).

Japanese Patent Laid-Open No. 9-64220 (page 3, FIG. 3) Japanese Patent Laying-Open No. 2003-1428 (page 3, FIG. 1, FIG. 7) JP 2009-731 A (Page 5, FIG. 2) Japanese Unexamined Patent Publication No. 2007-12752 (page 11, FIG. 9, FIG. 10)

  However, the size of parts required as parts for mobile devices in recent years still does not stop, and the suction hole is within the outer shape of the lid even at the tapered working end of the suction nozzle described in Patent Document 3. However, the outer shape of the working end obtained by adding the thickness of the suction nozzle to the outer surface is difficult to fit within the outer shape of the lid, and it becomes impossible to obtain an area for spot bonding for temporary fixing.

  In addition, there is a temporary fixing technique disclosed in Patent Document 4 as a technique for performing sealing by irradiating a lid with laser light, although it is not seam bonding by a roller electrode. Here, as shown in a plan view in FIG. 9, the plurality of containers 62 are aligned and placed, and the lid 63 is positioned and placed on each container 62. Then, a rod-like body 64 as a pressing jig is applied to the lid 63 from above and is temporarily fixed by irradiating laser light spotwise. That is, here, since the lid 63 is positioned and placed on the container 62 for each sheet by the pickup tool having the suction nozzle, temporary bonding is performed as a separate process. This includes the possibility that the lid 63 will be displaced from when it is placed to when the pressing jig 64 is applied, and it is less efficient than provisional fixing at the same time that the lid 63 is placed one by one.

  In addition, when laser welding is performed on the entire periphery of the lid, weld marks (beads) impair aesthetics, and there are many demands for sealing the periphery of the lid by seam bonding with a roller electrode having a good finished appearance. Therefore, the inventor is not limited to temporary fixing by resistance welding using electrodes, and can cope with a lid having a small outer dimension, and the method of sealing and joining the entire circumference of the lid in a later process is not limited. A method and apparatus are provided.

As a first aspect of the present invention, the lid is spotted on the container prior to the sealing operation in which the lid is placed in the opening of the container for housing the electronic component and the periphery of the lid is joined to the opening. In the lid temporary fixing method in which both are temporarily fixed by joining, the lid is sucked and held by a suction nozzle having a laser beam permeability at least in the vicinity of the working end, and the lid held by the suction nozzle is opened in the container In the state where the suction nozzle urges the lid toward the container, the lid is applied to the container by irradiating the lid with laser light through the vicinity of the working end. The present invention provides a method for temporarily fixing a lid, which is characterized by being temporarily fixed.

As a second aspect of the present invention, the irradiation position of the laser beam is an upper surface or an end surface of the lid, and the outer shape of the suction action end of the suction nozzle covers the outer shape of the lid. The provisional fixing method of the lid described as the first aspect is provided.

Further, as a third aspect of the present invention, prior to a sealing operation in which a lid is placed in an opening of a container that houses an electronic component, and a peripheral edge of the lid is joined to the opening, the lid is attached to the container. A lid temporary fixing device that temporarily fixes both of them by spot bonding, a laser light generating part, a laser light transmitting part, a laser light emitting optical part, and a material having laser light transmittance at least near the working end A lid temporary fixing device comprising: a suction nozzle configured as described above.

Furthermore, as a fourth aspect of the present invention, a third aspect is characterized by comprising a plurality of laser beam emission optical units and a laser beam branching optical unit interposed between the laser beam emission optical unit and the laser beam generation unit. The lid temporary fixing device described as the embodiment is provided.

  According to the first aspect of the present invention, the area where the upper surface of the lid is exposed around the suction nozzle working end is narrow, the position close to the working end of the suction nozzle, or the position partially overlapping the working end area Even when spot welding is performed, the laser beam passes through the suction nozzle, so even if there is no large difference in the area between the lid and the working end of the suction nozzle, a free position can be spot-bonded, and temporary provision is ensured. It is possible to stop.

  According to the second aspect of the present invention, since spot bonding by laser light is possible inside the working end contour of the suction nozzle, if the lid has a larger contour than the suction hole formed at the working end of the suction nozzle. The lid smaller than the outer shape of the working end can be temporarily fixed.

  According to the third aspect of the present invention, it is possible to obtain the apparatus for temporarily fixing the lid described in the first and second aspects of the present invention. Further, according to the fourth aspect of the present invention, since a plurality of locations (for example, two locations) on the lid can be spot-bonded and temporarily fixed, a more reliable temporary fixing operation can be realized.

The side view of the temporary fix | stop apparatus of the lid which shows embodiment of this invention The principal part side view of the temporary fix | stop apparatus of the lid which shows embodiment of this invention The top view of the container and lid which show embodiment of this invention Side view showing another embodiment of the present invention Sectional view of a container showing conventional technology Side view of main parts of lid temporary fixing device showing conventional technology Side view of main parts of lid temporary fixing device showing conventional technology Side view of main parts of lid temporary fixing device showing conventional technology Plan view of container and lid showing conventional technology

  Next, embodiments of a lid temporary fixing method and apparatus according to the present invention will be described in detail with reference to the accompanying drawings.

  FIG. 1 is a side view of a temporary tacking device for a lid according to the present invention. Reference numeral 1 denotes a guide mechanism and a driving mechanism (not shown) that can be moved in the left-right direction as viewed from the paper surface. It is a base which supports a part. 2 is a cam plate, 3 is a cam follower interlocking with the cam plate 2, 4 is an arm, and 5 is mounted between the base 1 and the arm left end 4A in order to make the cam follower 3 follow changes in the radius of the cam plate 2. A tension coil spring, 6 is a laser beam emission optical part, and 7 is a suction nozzle in which 7A in the vicinity of its working end (one end serving as a suction surface) is made of a material having laser beam transparency.

Reference numeral 7B denotes an adsorption nozzle main body that is supported by the base 1 so as to be movable up and down, and is connected to an exhaust device (not shown) through the exhaust hole 7C to generate a negative pressure at the adsorption action end that is the lower end of the adsorption nozzle. Let 8 is a tension coil spring mounted between the upper end 7C of the suction nozzle and the right end 4B of the arm 4, 9 is a support block supported by the base 1 so as to be movable up and down, and 10 is a lid in a state of being sucked by the suction nozzle 7. , 11 is a container positioned and placed on the stage 12, 13 is a laser beam generation unit, 14 is a laser beam transmission comprising an optical fiber for guiding the laser beam from the laser beam generation unit to the laser beam emission optical unit. Part.

  Next, the temporary fixing operation of the lid by spot bonding will be described with reference to FIGS. FIG. 1 shows a state in which a lid 10 is sucked by a suction nozzle 7 from a lid supply unit (not shown) and moved to a temporary fixing stage. Here, as the motor (not shown) is driven, the cam plate 2 rotates about the rotation shaft 2A. The cam plate 2 is eccentric with respect to the rotating shaft 2A of the shaft of the motor. When a portion with a small radius comes below the rotating shaft 2A due to the rotation, the cam plate 2 is pivotally attached to the arm 4 and is pulled by the tension coil spring 6. The cam follower 3 biased to the side moves upward.

  As the cam follower 3 rises, the left end 4A of the arm rises around the fulcrum 4C, and at the same time, the right end 4B of the arm descends. Here, the right end 4B of the arm supports the upper end 7C of the suction nozzle and the protrusion 9A provided integrally with the support block 9 from below, and the suction nozzle 7 and the right end 4B of the arm move downward. The laser beam emission optical unit 6 is also lowered at the same time. By lowering the suction nozzle 7, the lid 10 sucked and held at its working end comes into contact with the upper surface of the container 11. As a result, the suction nozzle 7 stops descending, but the cam plate 2 continues to rotate and the right end 4B of the arm continues to descend further.

Here, the relative displacement between the right end 4B of the descending arm and the upper end 7C of the suction nozzle in a state where the lowering is stopped is absorbed by the extension of the tension coil spring 8, and the suction force is generated by a predetermined pressing force by the reaction force. 7 urges the lid 10 toward the container 11. Further, even after the suction nozzle 7 is stationary, the laser light emission optical unit 6 continues to descend as the right end 4B of the arm descends, but eventually the micro switch in which the lower surface of the right end 4B of the arm is fixed to the suction nozzle body 7B. 15 is contacted and the contact is switched. When the contact point of the micro switch 15 is switched, the rotation of the cam plate 2 is stopped, and at the same time, the laser beam emission optical unit 6 is stopped at a predetermined height adjusted in advance.

  2 is an enlarged view of the main part of FIG. 1, FIG. 2A is a state before the lid 10 is placed on the container 11, and FIG. 2B is a state where the lid 10 is placed on the container 11. Then, the laser light emission optical unit 6 shows a state in which the lid 10 is irradiated with the laser light. Here, the laser beam emission optical unit 6 refocuses the laser beam emitted as diffused light from the optical fiber end surface of the laser beam transmission unit 14 at a predetermined position through an optical lens. The refocusing position is the upper surface or the end surface of the lid 10, but these portions are covered by the working end of the suction nozzle. However, since the vicinity of the working end 7A of the suction nozzle 7 has laser beam transparency, the laser beam is transmitted therethrough, and energy is applied to the lid 10 and the bonding material interposed between the lid 10 and the container 11 to generate heat, thereby spot bonding. Is done.

  Next, a state in which the lid 10 is placed on the container by the suction nozzle 7 is shown in a plan view in FIG. Here, two circles indicated by a two-dot chain line are the outer shape of the working end of the suction nozzle 7 and the outer shape of the suction hole provided at the working end of the suction nozzle 7. The outer shape of the suction hole is a diameter that fits on the upper surface of the lid 10, but the outer shape of the working end is in a state of protruding from the region because the outer shape of the lid 10 is too small. A small circle hatched with diagonal lines is a portion where a laser beam emitting optical unit (not shown) irradiates the laser beam and spot bonding is performed. In this figure, four spots are shown as representative candidates, but in this embodiment, any one of these spots is spot-joined.

  Next, another embodiment will be described with reference to FIG. In this embodiment, the embodiment described with reference to FIG. 1 performs temporary fixing spot bonding at one place on one lid, whereas two temporary fixing spot bondings on one lid. It is comprised so that it may perform. Therefore, the laser beam generated by the laser beam generator 13 is bifurcated by the laser beam branching optical unit 16 and transmitted to the paired laser beam emitting optical units 6. In this embodiment, only a pair of support blocks 9 for supporting the laser beam emission optical section 6 are provided, and the operation is the same as that of the embodiment described with reference to FIG.

  By adopting such a configuration, laser light can be irradiated to two places on one lid simultaneously from a pair of laser light emission optical parts. Therefore, among the candidate positions of spot joints shown in FIG. It becomes possible to spot-join two substantially central portions of two opposing sides. There is little possibility of the lid being lifted up and the like, and a more reliable temporary fixing of the lid can be realized. In addition, in FIG. 3, the shape of the lid 10 is rectangular in plan view, and when spot joining is performed at four corners, it seems possible that the laser light does not pass through the working end of the suction nozzle. If the aspect ratio of the shape (rectangle) of the lid 10 is small (close to a square), this is impossible, and the lid temporary fixing method and apparatus according to the present invention exerts its effect.

DESCRIPTION OF SYMBOLS 1 Base 2 Cam plate 3 Cam follower 4 Arm 5, 8 Pulling coil spring 6 Laser light emission optical part 7 Adsorption nozzle 9 Support block 10 Lid 11 Container 12 Stage 13 Laser light generation part 14 Laser light transmission part 15 Microswitch 16 Laser light branching Optics

Claims (4)

A lid is placed in the opening of the container that houses the electronic components, and prior to the sealing operation of joining the periphery of the lid to the opening, the lid is spot-bonded to the container to temporarily fix them. In the method of temporarily fixing the lid, the lid is sucked and held by a suction nozzle having a laser beam permeability at least in the vicinity of the working end, and the lid held by the suction nozzle is positioned and placed at the opening of the container, A lid characterized in that, with the suction nozzle urging the lid in the direction of the container, the lid is temporarily fixed to the container by transmitting the vicinity of the working end and irradiating the lid with laser light. Temporary fixing method. 2. The lid according to claim 1, wherein the irradiation position of the laser beam is an upper surface or an end surface of the lid, and an outer shape of the suction action end of the suction nozzle covers an outer shape of the lid. Temporary fixing method. A lid is placed in the opening of the container that houses the electronic components, and prior to the sealing operation of joining the periphery of the lid to the opening, the lid is spot-bonded to the container to temporarily fix them. A lid temporary fixing device, comprising: a laser beam generation unit, a laser beam transmission unit, a laser beam emission optical unit, and a suction nozzle formed at least in the vicinity of the working end with a material having laser beam transparency. Lid temporary fixing device. 4. The lid temporary fixing device according to claim 3, further comprising: a plurality of laser beam emission optical units; and a laser beam branching optical unit interposed between the laser beam emission optical unit and the laser beam generation unit.

Images