JP6886895B2 - Suction nozzle assembly - Google Patents

Description

The present disclosure relates to a suction nozzle assembly.

Conventionally, a suction nozzle assembly mounted on an electronic component carrier has been used to transport chip-shaped electronic components such as semiconductor elements, capacitors, and resistors. This suction nozzle assembly is a combination of a suction nozzle and a flange, and includes a through hole that serves as a suction hole.

In recent years, in order to improve the reliability of adsorption of electronic components, the shape of the suction hole is not circular but rectangular or capsule-shaped according to the shape of the electronic component. Therefore, it is necessary to align the suction nozzle and the flange in a predetermined direction rather than simply combining them.

Applicants have a protrusion in which one of the suction nozzles or the flange projects toward the other in a direction orthogonal to the insertion direction of the suction nozzle, and the other of the suction nozzle or the flange corresponds to the protrusion. We are proposing a configuration that has a receiving portion to be used and can be aligned in a predetermined direction by fitting the protruding portion and the receiving portion.

Japanese Patent No. 6039353

If the size of the suction nozzle is reduced as the size of the electronic component is reduced, it may be difficult to form the protrusion and the receiving part. Therefore, the suction nozzle and the flange are more easily oriented in a predetermined direction. There is a need for a configuration that can be matched.

The suction nozzle assembly of the present disclosure is made of ceramics and includes a suction nozzle having a through hole extending from a first end to a second end, and a tubular flange including the second end of the suction nozzle. The suction nozzle has one or more flat first surfaces that are located from the second end to the first end and face the through hole. Further, the flange has a second surface facing the first surface on at least a part of the inner peripheral surface. The first surface and the second surface are detent portions of the flange.

Although the suction nozzle assembly of the present disclosure has a simple structure, the suction nozzle and the flange can be aligned in a predetermined direction.

It is a perspective view which shows an example of the suction nozzle assembly of this disclosure. It is a vertical cross-sectional view of the suction nozzle assembly shown in FIG. It is a cross-sectional view of the suction nozzle assembly shown in FIG. It is a perspective view of the suction nozzle in the suction nozzle assembly shown in FIG. It is sectional drawing which shows the other example of the suction nozzle assembly of this disclosure. It is sectional drawing which shows the other example of the suction nozzle assembly of this disclosure. It is sectional drawing which shows the other example of the suction nozzle assembly of this disclosure. It is sectional drawing which shows the other example of the suction nozzle assembly of this disclosure. It is sectional drawing which shows the other example of the suction nozzle assembly of this disclosure. It is sectional drawing which shows the other example of the suction nozzle assembly of this disclosure. It is the schematic of the electronic component mounting apparatus which mounts an electronic component by the electronic component carrier which mounted the suction nozzle assembly of the present disclosure.

Hereinafter, embodiments of the suction nozzle assembly of the present disclosure will be described.

FIG. 1 is a perspective view showing an example of the suction nozzle assembly of the present disclosure. FIG. 2 is a vertical cross-sectional view of the suction nozzle assembly shown in FIG. FIG. 3 is a cross-sectional view of the suction nozzle assembly shown in FIG. The "vertical" and "horizontal" in FIGS. 2 and 3 mean "vertical" in the direction along the axial direction of the suction nozzle assembly and horizontal in the direction orthogonal to the axial direction. Further, FIG. 2 is a vertical cross-sectional view including the central axis of the suction nozzle assembly. Further, FIG. 3 is a cross-sectional view of the portion indicated by reference numeral B in FIG. 2, and since the suction nozzle is not a cross section, it is not hatched. Further, in FIG. 3, the suction nozzles are colored and shown in order to facilitate understanding of the configurations of the suction nozzles and the flanges in the suction nozzle assembly.

The suction nozzle assembly 10 shown in FIGS. 1 to 3 includes a suction nozzle 1 and a flange 2. The suction nozzle 1 is made of ceramics and includes a suction surface 1a located at the first end A and a through hole 1b located across the first end A and the second end B, as shown in FIG. Further, as shown in FIG. 2, the flange 2 is a tubular body having a through hole 2a and an inner peripheral surface 2b and including the second end B of the suction nozzle 1. The through hole 2a provided in the flange 2 is connected to the through hole 1b provided in the suction nozzle 1 and functions as a suction hole for sucking an electronic component.

Further, as shown in FIG. 3, the suction nozzle 1 has at least one flat first surface 1c located facing the through hole 1b. Here, "opposite" means that the through hole 1b and the first surface 1c face each other. For example, in FIG. 3, when the through hole 1b is sandwiched between two vertical lines extending from both ends of the first surface 1c. Say that. Further, as shown in the perspective view of FIG. 4, the first surface 1c of the suction nozzle 1 is located from the second end B toward the first end A. In FIG. 4, the first surface 1c reaches the stepped portion, but the first surface 1c only needs to be from the second end B to the first end A, and does not reach the stepped portion. There may be.

Further, the flange 2 has a second surface 2c facing the first surface 1c at least a part of the inner peripheral surface 2b. The second surface 2c may be a flat surface or a convex curved surface facing the first surface 1c.

In the suction nozzle assembly 10 of the present disclosure, the first surface 1c and the second surface 2c are detent portions of the flange 2 with respect to the suction nozzle 1. By satisfying such a configuration, the suction nozzle assembly 10 of the present disclosure can align the suction nozzle 1 and the flange 2 in a predetermined direction, although it has a simple structure.

In the combination of the suction nozzle 1 and the flange 2, a method of fitting the second end B side of the suction nozzle 1 to the flange 2 may be used, but from the viewpoint of more firmly fixing, the inner circumference of the flange 2 and the suction are sucked. A certain amount of clearance may be provided on the outer periphery of the nozzle 1 and fixed with an adhesive.

The second surface 2c may be a surface parallel to the first surface 1c. When such a configuration is satisfied, the effect of the detent is further enhanced. Further, in the cross section orthogonal to the axial direction as shown in FIG. 3, the detent effect is enhanced when the length of the second surface 2c is close to the length of the first surface 1c. Here, the approximation means a case where the length of the second surface 2c is 95% or more with respect to the length of the first surface 1c.

On the outer circumference of the suction nozzle 1, both sides of the first surface 1c in the circumferential direction may be connected by a curved surface. When such a configuration is satisfied, since there are no corners on both sides of the first surface 1c in the circumferential direction, it is easy to combine the suction nozzle 1 and the flange 2, and it is difficult for chipping to occur due to contact at the time of combination.

In addition, being connected by a curved surface can be rephrased as being connected at an angle of 110 ° or more and 170 ° or less between the first surface 1c and the tangent line of the adjacent surface in the cross-sectional view as shown in FIG. Can be done.

FIG. 5 is a cross-sectional view showing another example of the suction nozzle assembly of the present disclosure, and the cutting position of the cross section is the same as that of FIG. The suction nozzle assembly 20 of the example shown in FIG. 5 has a gap 3 between the first surface 1c and the inner peripheral surface 2b of the flange 2. When such a configuration is satisfied, when an adhesive is used for fixing, even if the amount exceeds an appropriate amount, it becomes difficult for the adhesive to flow out from between the suction nozzle 1 and the flange 2, and the work of wiping off the adhesive that has flowed out. Is less likely to occur.

6 to 8 are cross-sectional views showing another example of the suction nozzle assembly of the present disclosure, and the cutting position of the cross section is the same as that of FIG. The suction nozzle assembly 30 shown in FIG. 6 is an example including two first surfaces 1c. The suction nozzle assembly 40 shown in FIG. 7 is an example including three first surfaces 1c. The suction nozzle assembly 50 shown in FIG. 8 is an example including four first surfaces 1c. As described above, in the suction nozzle assembly of the present disclosure, the first surface 1c may be a plurality.

Further, as shown in FIG. 9, when the shapes of the flange 2 and the suction nozzle 1 and the centers of the flanges 2 are close to each other in the direction orthogonal to the axial direction, the wall thickness of the flange 2 is approximated by the portion. Therefore, reliability is improved. Further, when the flange 2 has a flat surface, this surface can be used as a reference surface for aligning with a predetermined direction in combination with the electronic component carrier.

Although a plurality of examples of the suction nozzle assembly of the present disclosure have been described above, in the following description, since it is a matter common to the suction nozzle assembly described above, reference numeral 100 will be attached.

The first surface 1c of the suction nozzle assembly 100 of the present disclosure may have an arithmetic average roughness Ra obtained from the roughness curve of 0.04 μm or more and 0.18 μm or less. When such a configuration is satisfied, when an adhesive is used for fixing, there is little shedding from the surface of the suction nozzle 1 during handling including the combination, and the adhesive has high adhesive strength.

Further, the first surface 1c of the suction nozzle assembly 100 of the present disclosure may have a skewness Rsk obtained from the roughness curve of -1 or more and 1 or less. A surface property having a skewness Rsk of -1 or more and 1 or less obtained from the roughness curve has a high adhesive force when an adhesive is used for fixing because there are appropriately ridges that are not too sharp.

Here, the arithmetic mean roughness Ra obtained from the roughness curve and the skewness Rsk obtained from the roughness curve in the present disclosure are SURFCOM 1400D manufactured by Tokyo Seimitsu Co., Ltd.
It is a value obtained by using a contact type measuring instrument. As the measurement conditions, a stylus having a stylus diameter of 2 μm is used, the measurement length is 0.25 mm, the cutoff wavelength value is 0.025 mm, the scanning speed is 0.06 mm / sec, and the tilt correction is the minimum square. It is set for curve correction. It should be noted that, on the first surface 1c, at least three points are measured, and the average value thereof is used as the value of the arithmetic average roughness Ra and the skewness Rsk.

Further, in the suction nozzle 1 in the suction nozzle assembly 100 of the present disclosure, the through hole 1b corresponding to the portion having the first surface 1c has the outer peripheral shape, orientation and shape of the portion having the first surface 1c. It may be the same. When such a configuration is satisfied, the wall thickness of the suction nozzles 1 becomes uniform, so that the suction nozzles required for further miniaturization of electronic parts and improvement of the transport speed are required. It is possible to respond to the thinning of 1.

Specifically, in the suction nozzle 1, when the shape of the through hole 1b and the outer peripheral shape are different, or when the outer peripheral shape and the direction of the through hole 1b are different, the thickness which is the distance from the through hole 1b to the outer circumference is different. However, when the above configuration is satisfied, the wall thicknesses of the suction nozzles 1 are uniform (see FIGS. 1 and 10). Here, the fact that the orientation and the shape are the same does not mean that they must match exactly, but is a concept that includes an approximate shape such as a different corner shape.

Next, the material of each member will be described. First, the flange 2 is made of a metal member such as stainless steel or an aluminum alloy. Next, the adsorption nozzle 1 is made of ceramics, and examples thereof include zirconia ceramics, alumina ceramics, zirconia-alumina composite ceramics, and silicon carbide ceramics. Here, the zirconia ceramics are ceramics containing zirconia as a main component, and the same applies to the others. The main component referred to here is 55% by mass or more when the component constituting the ceramic is 100% by mass. Further, the zirconia-alumina composite ceramic contains zirconia and alumina, and the total content of zirconia and alumina is 55% by mass or more. It may have a high content.

When the suction nozzle 1 is made of zirconia ceramics, the diameter of the portion on the first end side including the suction surface 1b can be reduced because of its high mechanical strength.

Further, when the zirconia ceramics contain a conductive component, even if the suction nozzle 1 is charged with static electricity, the static electricity can be removed through the flange 2. Therefore, electrons are generated by dust or the like adhering to the suction nozzle 1 due to the static electricity. It is possible to reduce the risk of contaminating the components or disturbing the alignment of the electronic components that are lined up and causing the mounting position to shift. The specific resistance value of the suction nozzle 1 made of zirconia ceramics is 10 ³ Ω or more and 10 ¹¹ Ω or less.

Here, examples of the conductive component include iron oxide, chromium oxide, titanium oxide, manganese oxide, nickel oxide and the like. When these conductive components are contained, the zirconia ceramics have a dark color tone. In general, many electronic components have a light color tone, and therefore, when the suction nozzle 1 has a dark color system, a recognition error or malfunction is caused by the CCD camera and the image analysis device included in the electronic component mounting device described later. Can be reduced.

Examples of the adhesive include an adhesive containing divinylbenzene, bisphenol F, polyglycidyl ether, vinylcyclohexine dioxide, dicyclopentadiene oxide, epoxy resin, urethane, silicon, acrylic and the like. When an adhesive containing divinylbenzene is used, it is highly elastic and does not plastically deform even at a temperature of about 200 ° C., so that the adsorption nozzle assembly 100 can be used even in a high temperature environment.

Further, the adhesive may have conductivity. For example, a single or composite of Au, Ag, Cu, Ni, Al, Fe, C, Co, Cr, Mo, Pd, Pt, Pb, Sn, and Zn may be mixed with the adhesive and used. ..

Next, an electronic component mounting device for mounting electronic components by an electronic component carrier equipped with the suction nozzle assembly of the present disclosure will be described with reference to the schematic view of FIG.

The electronic component mounting device 9 shown in FIG. 11 includes an electronic component carrier 5 including a suction nozzle assembly 100, a light 6 that irradiates light toward the electronic component 4 adsorbed on the suction nozzle assembly 100, and an electronic component. It is composed of a CCD camera 7 for displaying 4 and an image analysis device 8 for processing an image taken by the CCD camera 7. By using this electronic component mounting device 9, the electronic components 4 arranged on the tray can be mounted at a predetermined position on the circuit board.

Next, a method of manufacturing the suction nozzle assembly of the present disclosure will be described.

First, an example of a method for manufacturing a suction nozzle will be described. A zirconia powder containing a stabilizer (hereinafter, simply referred to as zirconia powder) is prepared. At this time, yttria, ceria, magnesia or the like may be used as the stabilizer, and 2 to 8 mol of these stabilizers are used. If it contains about%, it becomes zirconia ceramics having sufficient strength for practical use. Then, a solvent is added to the zirconia powder and pulverized using a ball mill, a bead mill or the like until the average particle size becomes 0.2 to 0.5 μm, and this is used as the first slurry.

Next, a solvent is added to the conductive component powder containing iron oxide, chromium oxide and titanium oxide, and the powder is pulverized using a ball mill, a bead mill or the like until the average particle size becomes 0.1 to 0.5 μm, and this is seconded. Slurry. Manganese oxide powder and nickel oxide powder can also be used as the conductive component powder. The mass ratio of the zirconia powder to the conductive component powder is, for example, 60:40 to 85:15.

Next, the first slurry and the second slurry are mixed and then spray-dried with a spray dryer to obtain granules. A dispersant may be added at the time of this mixing. The amount of the dispersant added is, for example, 0.1 to 1.0 parts by mass with respect to 100 parts by mass in total of the zirconia powder and the conductive component powder.

Next, these granules, a thermoplastic resin, wax and the like are put into a kneader and kneaded while heating to obtain a clay. Then, the obtained clay is put into a pelletizer to obtain pellets as a raw material for injection molding (injection molding). As the thermoplastic resin to be charged into the kneader, ethylene vinyl acetate copolymer, polystyrene, acrylic resin and the like can be used, and the amount of addition is 100 parts by mass in total of the zirconia powder and the conductive component powder. , About 10 to 25 parts by mass may be added. Further, the kneading conditions using the kneader may be set to a heating temperature of 100 to 170 ° C. and a kneading time of 0.5 to 3 hours.

Next, pellets are put into an injection molding machine (injection molding machine) provided with a mold for obtaining a desired shape, and injection molding is performed to obtain a molded product. After that, the molded product is degreased and fired in an air atmosphere at a temperature of 1300 to 1500 ° C. for 1 to 3 hours to obtain an adsorption nozzle made of zirconia ceramics.

It is also possible to carry out a wet barrel or a dry barrel after firing. Further, after obtaining the molded product, the portion to be the first surface may be cut, or the first surface may be formed by polishing after firing.

Further, the surface texture of the first surface can be made into a desired surface texture by transferring the surface texture of the portion corresponding to the first surface in the mold. Further, when processing a wet barrel, a dry barrel, or the like after firing, the surface texture of the portion corresponding to the first surface of the mold may be considered to change in the surface texture due to the processing.

Next, by preparing a flange having a desired shape made of a metal member and combining the suction nozzle and the flange, the suction nozzle assembly of the present disclosure can be obtained. As an example of using the adhesive, for example, an adhesive containing divinylbenzene may be prepared, the adhesive may be applied to a portion of the suction nozzle facing the inner circumference of the flange, and then combined with the flange.

1: Suction nozzle 1a: Suction surface 1b: Through hole 1c: First surface 2: Flange 2a: Through hole 2b: Inner peripheral surface 2c: Second surface 3: Gap 10, 20, 30, 40, 50, 60, 70 : Suction nozzle assembly 4: Electronic parts 5: Electronic parts carrier 6: Light 7: CCD camera 8: Image analysis device 9: Electronic parts mounting device

Claims (9)

A suction nozzle made of ceramics and having a through hole extending from the first end to the second end,
A tubular flange that includes the second end of the suction nozzle and is included in the suction nozzle.
The suction nozzle has one or more flat first surfaces that are located from the second end to the first end and face the through hole.
The flange has a second surface facing the first surface on at least a part of the inner peripheral surface.
The first surface and the second surface, Ri detent portion der of the flange,
The first surface has a skewness Rsk obtained from the roughness curve of -1 or more and 1 or less.
Suction nozzle assembly. The suction nozzle, the first surface of a to which parts corresponding to the through hole, the outer peripheral shape and orientation and shape of the portion having a first surface is the same, the adsorption of claim 1 Nozzle assembly. A suction nozzle made of ceramics and having a through hole extending from the first end to the second end,
A tubular flange that includes the second end of the suction nozzle and is included in the suction nozzle.
The suction nozzle has one or more flat first surfaces that are located from the second end to the first end and face the through hole.
The flange has a second surface facing the first surface on at least a part of the inner peripheral surface.
The first surface and the second surface are detent portions of the flange.
In the suction nozzle, the through hole corresponding to the portion having the first surface has the same orientation and shape as the outer peripheral shape of the portion having the first surface.
Suction nozzle assembly. The suction nozzle assembly according to any one of claims 1 to 3, wherein the second surface is parallel to the first surface. The suction nozzle assembly according to any one of claims 1 to 4, wherein the first surface is connected by a curved surface in the circumferential direction. The suction nozzle assembly according to any one of claims 1 to 5 , which has a gap between the first surface and the inner peripheral surface. The suction nozzle assembly according to any one of claims 1 to 6 , wherein the first surface has an arithmetic average roughness Ra obtained from a roughness curve of 0.04 μm or more and 0.18 μm or less. The suction nozzle assembly according to any one of claims 1 to 7, wherein the suction nozzle is made of zirconia ceramics. The suction nozzle assembly according to claim 8, wherein the zirconia ceramics contain a conductive component.

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