JP2011146609A - Method of manufacturing wiring board, and positioning jig for metal fitting - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method of manufacturing a wiring board by which shaft portions can be easily and securely bonded to the top surface and the reverse surface of a board body in a vertical posture when the wiring board to which a metal fitting having a flange and the shaft portions is bonded by brazing is manufactured, and to provide a positioning jig for the metal fitting. <P>SOLUTION: The method of manufacturing the wiring board includes: a first step of mounting a sheet type brazing filler metal on the upper surface of a metallized layer 6 formed on the top surface 3 of the board body 2; a second step of arranging a first jig 15 having a through hole 16 in which the metallized layer 6 and brazing filler metal are stored; a third step of attaching a second jig 20 to the metal fitting 10 by inserting shaft portions 13 and 14 of the metal fitting 10 into the through hole 24 of the second jig 20; a fourth step of mounting the flange 11 of the metal fitting 10 on the brazing filler metal by inserting the metal fitting 10 to which the second jig 20 is attached into the through hole 16; a fifth step of melting the sheet type brazing filler metal 7, thereafter; and a process of removing the first and second jigs 15 and 20, thereafter. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a method of manufacturing a wiring board including a step of brazing and joining a metal fitting having a flange and a shaft portion to at least one of the front and back surfaces of a substrate body made of an insulating material, and the metal fitting used in the production method. The present invention relates to a positioning jig.

  For example, when a nail head type pin is soldered on each of a plurality of pads provided in advance on the main surface of a substrate made of resin, the nail is attached to each of the plurality of through holes in the pin fixing plate on the pad side. Pins are inserted and held toward each other, and a layered solder is sandwiched between a similar solder disposed on each pad and the pin fixing plate, and then the solder is melted to obtain a plurality of pins. Discloses a method for manufacturing a substrate for PGA type electronic components in which is bonded to the main surface of the substrate (see, for example, Patent Document 1).

By the way, a wiring board in which a metal fitting having a flange such as a stud bolt and a shaft portion including a male screw is brazed and joined to at least one of the front and back surfaces of a substrate body made of a ceramic or resin insulating material. For manufacturing, the following metal fitting positioning jigs are used.
That is, a sheet-like brazing material is placed on the metallized layer formed in advance on the front surface or the back surface of the substrate body, surrounds the metallized layer and the brazing material, and has a diameter larger than that of the shaft portion of the metal fitting. A plate-shaped jig having a through-hole that can be accommodated by the flange is placed on the front or back surface of the substrate body and restrained, and a stud bolt with the flange on the bottom side is inserted into the through-hole. The metal fittings are joined by melting the material. On the bottom surface of the plate-like jig, a recess having a depth capable of accommodating the metallized layer and the brazing material including the melted fillet is formed by the through hole and the coaxial center.

Furthermore, when the brazing material is melted, depending on the shape of the bolt (metal fitting), if the center of gravity of the bolt is relatively far from the brazing material, the brazing material solidifies in a state where the bolt is inclined, The shaft portion is not substantially perpendicular to the front surface (back surface) of the substrate body. In order to prevent such inclination, the brazing is performed in a state where a weight is placed on the upper end of the shaft portion of the bolt and outside the through hole in the plate-like jig.
However, since there is a gap for fitting between the through hole provided in the plate-shaped jig and the shaft portion of the bolt, it is caused by disturbance due to vibration in the brazing process. When the brazing material is melted, the weight and the baltic are inclined in different directions, and the brazing material is solidified in the inclined posture, so that the shaft portion of the bolt is There was a problem that it was not almost perpendicular to the front and back surfaces.

JP-A-9-129778 (pages 1-7, FIGS. 1-13)

  The present invention solves the problems described in the background art, and when manufacturing a wiring board joined by brazing a metal fitting having a flange and a shaft portion, the shaft portion is against the front and back surfaces of the substrate body, It is an object of the present invention to provide a method of manufacturing a wiring board that can be easily and surely bonded in a vertical posture, and a metal fitting positioning jig used therefor.

Means for Solving the Problems and Effects of the Invention

In order to solve the above problems, the present invention arranges the first jig on the front and back surfaces of the substrate body, and inserts the second jig together with the metal fitting into the through hole of the first jig. It was designed with the idea in mind.
That is, the method for manufacturing a wiring board according to the present invention (Claim 1) is a method for manufacturing a wiring board in which a metal fitting made of a shaft and a flange is fixed to at least one of a front surface and a back surface of a board body made of an insulating material by a brazing material. A first step of placing a sheet-like brazing material on the upper surface of the metallization layer formed on at least one of the front and back surfaces of the substrate body, and the brazing material among the front and back surfaces of the substrate body. A second step of arranging a first jig having a through hole for accommodating the metallized layer and the brazing material on the side of the metallized layer on which the material is placed, and the shape in plan view are similar to the through hole. A third step of inserting a shaft portion of the metal fitting into the through hole of the second jig having a certain through hole, and attaching the second jig to the metal fitting, and through the first jig from above; A second jig is installed in the hole. A fourth step of inserting the attached metal fitting and placing the flange of the metal fitting on the brazing material; and a fifth step of dissolving the sheet-like brazing material after the fourth step. And a step of removing the second jig from the metal fitting and removing the first jig from the substrate body after the brazing step.

According to this, in the second step, the first jig for storing the metallized layer and the brazing material is disposed on the front surface or the back surface of the substrate body on which the metallized layer on which the brazing material is placed is disposed. In the step, the shaft portion of the metal fitting is inserted into the through hole of the second jig in advance, and the second jig is attached to the metal fitting. In the fourth step, the second jig is inserted into the through hole of the first jig. The metal fitting to which the jig 2 is attached is inserted, and the flange of the metal fitting is placed on the brazing material. As a result, the metal fitting is mounted on the brazing material, and the shaft portion is in a posture in which the axial direction is perpendicular to the front and back surfaces of the substrate body by the second and first jigs. Be bound. In this state, since the brazing for dissolving the brazing material in the fifth step is performed, the metal fitting is melted and melted in a posture in which the flange is parallel to the front and back surfaces of the substrate body and the shaft portion is substantially vertical. It joins on the said metallized layer through the solidified brazing material.
Therefore, it is possible to easily and reliably manufacture a wiring board in which a metal fitting having a flange and a shaft portion is joined by brazing in a required posture.

The insulating material constituting the substrate body of the wiring board is various ceramics (high-temperature fired ceramics such as alumina, or glass-ceramics which are a kind of low-temperature fired ceramics), or epoxy resins.
The substrate body may be a multi-cavity configuration in which a plurality of wiring boards are arranged adjacent to each other in the vertical and horizontal directions, and there are ears for discarding around these product areas.
Further, the metal fitting includes, for example, a flange having a circular shape in a plan view and a shaft portion having a circular shape in a plan view protruding perpendicularly from the center portion of the flange. A so-called stud bolt comprising a shaft portion having a relatively small diameter and a male screw portion engraved on the peripheral surface is provided.
Further, the first and second jigs have a low heat such as carbon (graphite), ceramic, metal or alloy (for example, Fe-36% Ni (invar)) having a relatively large heat capacity and a low coefficient of thermal expansion. Expansion alloy).
Furthermore, the first jig is, for example, plate-shaped as a whole, and the through-hole having a circular shape in plan view passes between the front and back surfaces, or as described later. A form in which a concave portion having a circular shape in plan view communicates with one end side of the hole is included.
Further, the second jig has, for example, a substantially cylindrical shape or a substantially conical shape as a whole, and has a circular through-hole in a central view in the axial direction.
Further, the second jig has its center of gravity located on the flange side of the metal fitting, so that the cross section along the axial direction has a through hole portion surrounding the shaft part of the metal fitting on the upper side, and The bottom surface side in contact with the flange has a shape extending in the radial direction on the flange side.
In addition, in the fifth step, before the brazing material is melted, a weight may be placed on the upper end of the shaft portion of the metal fitting that protrudes above the first jig.

Further, in the present invention, the through hole of the first jig includes a concave portion opened coaxially at one end side, and the metallized layer and the brazing material are accommodated in the concave portion. A method (claim 2) is also included.
According to this, in the second step, when the first jig is disposed on the front surface or the back surface of the substrate body, the metallized layer and the brazing material are formed in the concave portion opened coaxially to one end side of the through hole. Is stored. As a result, even when the brazing material becomes a slightly flat brazing material including the melted fillet together with the metallized layer, the first jig is inadvertently inclined with respect to the front and back surfaces of the substrate body. Can be reliably prevented. At the same time, the bracket can be brazed while maintaining the required posture via the second jig.

Furthermore, the present invention includes a method of manufacturing a wiring board (Claim 3) in which the center of gravity of the metal fitting when the second jig is attached is located on the flange side of the metal fitting.
According to this, the center of gravity of the metal fitting to which the second jig is attached is inserted into the through hole in the first jig and the concave portion connected to the flange in a state where the center of gravity of the metal fitting is moved to the flange side from the center of gravity of the single metal fitting. The Accordingly, the brazing can be reliably performed without tilting the metal fitting so that the shaft portion is in a vertical posture with respect to the front and back surfaces of the substrate body.

  On the other hand, a metal fitting positioning jig according to the present invention (Claim 4) is a metal fitting positioning jig used in the brazing step of the method for manufacturing a wiring board, and has a front surface and a back surface, A first jig having a recess having an opening depth of 0.3 mm or more, a through hole between a center portion and a surface of the bottom surface of the recess, and detachable from the metal fitting. A second jig having a through-hole through which the shaft portion is inserted, and an inner peripheral surface of the through-hole and an outer surface that is parallel and accessible in a length of 0.3 mm or more along the axial direction; It is characterized by comprising.

According to this, in the second step, when the first jig is disposed on the front surface or the back surface of the substrate body, a concave portion that opens coaxially to one end side of the through hole and has a depth of 0.3 mm or more. In addition, the metallized layer and the brazing material can be securely stored. In addition, the brazing material including the melted fillet together with the metallized layer can reliably prevent the first jig from being inadvertently inclined with respect to the front and back surfaces of the substrate body.
Further, in the fourth step, the outer surface of the second jig attached to the metal fitting and the inner peripheral surface of the through hole of the first jig have a length of 0.3 mm or more along the axial direction. Since it becomes parallel and accessible, the brazing can be performed in a state where the metal fitting is reliably maintained in a required posture.
If the depth of the recess in the first jig is less than 0.3 mm, it may be difficult to store the metallized layer and the brazing material, and the outer surface of the second jig and the first jig may penetrate. When the axial length between the inner peripheral surface of the hole is less than 0.3 mm, the metal fitting to which the second jig is attached is inclined in the axial direction with respect to the through hole of the first jig. There is a fear. In order to prevent these, it was set as the said range.

In the present invention, a male screw is engraved on the peripheral surface of the shaft portion of the metal fitting, and a screw connection to the male screw is provided on the inner peripheral surface of the through hole in the second jig. A fitting positioning jig (Claim 5) in which a female screw is engraved is also included.
According to this, the 2nd jig | tool can be attached to a metal fitting by making both center axes common. In addition, when the metal fitting attached by adjusting the position of screw connection with the second jig is inserted into the through hole of the first jig, the second jig is applied to the inner peripheral surface of the through hole. The outer surface of the tool is reliably placed in a parallel and accessible manner by 0.3 mm or more. Therefore, the metal fitting can be brazed to the substrate body while maintaining the required posture.

Schematic which shows the cross section of the wiring board used as the object of the manufacturing method of this invention. Schematic which shows the 1st step in the manufacturing method of this invention. Schematic which shows the 2nd step in the said manufacturing method. The expanded sectional view which shows the dashed-dotted line part X in FIG. Schematic which shows the 3rd step in the said manufacturing method. The expanded sectional view similar to FIG. 4 which shows the 4th step of the said manufacturing method. The expanded sectional view similar to the above which shows the 5th step of the said manufacturing method. Schematic which shows the cross section of the wiring board obtained by the manufacturing method of this invention. Sectional drawing which shows the 2nd jig | tool of a different form. Sectional drawing which shows the 2nd jig | tool of an applied form. The same expanded sectional view as the above which shows the 4th step using the 2nd above-mentioned jig.

Hereinafter, modes for carrying out the present invention will be described.
In advance, as shown in FIG. 1, alumina (ceramic: insulating material) as a main component, a substrate body 2 having a front surface 3 and a back surface 4, and a plurality of metallized layers 6 on the surface 3 of the substrate body 2 are separated from each other. A wiring board 1 formed in this way was prepared. The metallized layer 6 is formed by forming a thin film such as a W or Mo coating layer, a sputtering layer of W, Mo, and a Ti—Cu alloy, or a plated layer of Cu, Ni, and Au, and is substantially circular in plan view. And a thickness of about 15 μm.
The substrate body 2 is formed by laminating a plurality of ceramic layers, and a wiring layer having a predetermined pattern is formed between these layers. Between the wiring layers or between the wiring layer on the back surface 4 side and the back surface 4, for example. Connection with the provided connection terminals is made possible by via conductors (both not shown). The substrate body 2 is a multi-cavity type having a plurality of wiring substrates (1), and the metallized layer 6 is formed for each surface 3 of each wiring substrate (1) region. It may be a thing.

First, as shown in FIG. 2, a brazing material 7 having a circular shape in plan view and preformed into a sheet shape was placed on each metallized layer 6 (first step). The brazing material 7 is made of, for example, an Au—Sn alloy having a thickness of about 50 μm.
Next, as shown in FIG. 3, on the surface 3 side of the substrate body 2 where the metallized layer 6 on which the brazing material 7 is placed is located, the through holes 16 and the recesses 18 are located at the positions of the metallized layer 6 and the brazing material 7. The 1st jig | tool 15 which has was arrange | positioned (2nd step).
The first jig 15 is made of carbon having a large heat capacity and low thermal conductivity, and is made of a plate-like material having a front surface 17 and a back surface 19, and is flat at a predetermined position between the front surface 17 and the back surface 19. The through-hole 16 has a circular view, and the back surface (one end) 19 side thereof is open and coaxially open and communicates with a concave portion 18 having a circular shape in plan view. As shown in the enlarged cross-sectional view of FIG. 4, the depth d of the recess 18 opened in the back surface 19 is 0.3 mm or more, so that the metallized layer 6 and the brazing material 7 can be securely placed in the recess 18. I was able to store it.

Next, as shown in FIG. 5, the second jig 20 in which the upper end of the circular through hole 24 having a circular shape in plan view is opened at the center of the top surface of the main body 22, which has a substantially disk shape as a whole, is formed in the through hole 24. The shaft portions 13 and 14 of the stud bolt (metal fitting: hereinafter simply referred to as a bolt) 10 were inserted (fitted) therein, and the second jig 20 was attached to the bolt 10 (third step).
The bolt 10 is made of, for example, Kovar (Fe-29% Ni-17% Co), and has a disk-shaped flange 11 (for example, outer diameter: 11.7 mm × thickness: 1.2 mm) and a right angle from the center thereof. And a shaft portion (13, 14) comprising a neck portion 13 and a male screw 14. Note that the symbol w1 in FIG. 5 indicates the position of the center of gravity of the bolt 10 alone.
On the other hand, the second jig 20 is also made of carbon having a large heat capacity and a low coefficient of thermal expansion, a substantially conical inclined surface 25, a cylindrical outer surface 27 parallel to the axial direction, and a bottom surface 29 having a circular shape in plan view. , And a recess 26 opening concentrically and in a similar shape on the bottom surface 29. The lower end of the through hole 24 is opened at the center of the ceiling surface 28 of the recess 26. The length along the axial direction of the through hole 24 is 1 mm or more, and the inner diameter of the through hole 24 is slightly larger than the outer diameter of the male screw portion 14 of the bolt 10. Further, the length h along the axial (vertical) direction of the outer surface 27 is 0.3 mm or more (for example, 1.0 mm). Note that the center of gravity w2 of the second jig 20 is relatively located on the bottom surface 29 side, as shown in FIG.
The first jig 15 and the second jig 20 constitute a positioning jig for the bolt (metal fitting) 10 of the present invention.

When the second jig 20 is attached, the bottom surface 29 of the second jig 20 comes into contact with the upper surface of the flange 11 of the bolt 10 as shown in the center of FIG. The center of gravity W was previously moved to the flange 11 side of the bolt 10 with respect to the center of gravity w1 when the bolt 10 was alone.
Furthermore, as shown by the white arrow in FIG. 6, the bolt 10 to which the second jig 20 is attached is inserted into the through-hole 16 from the upper side of the first jig 15, and the bolt The bolts 10 were placed on the brazing material 7 so that the bottom surface 12 of the 10 flanges 11 was in surface contact with the brazing material 7 (fourth step).
At this time, as shown in FIG. 6, the outer surface 27 of the second jig 20 is parallel to the inner peripheral surface of the through hole 16 in the first jig 15 at an axial length h of 0.3 mm or more. And approached. As a result, the flange 11 of the bolt 10 was parallel to the surface 3 of the substrate body 2, and the shaft portions (13, 14) were perpendicular to the surface 3 of the substrate body 2.
In this state, the brazing material 7 was heated to the melting point or higher and melted (fifth step).

As a result, as shown in FIG. 7, after the brazing material 7 is melted and solidified, it becomes a slightly thin brazing material 8, and the bottom surface 12 of the flange 11 of the bolt 10 sinks into the upper surface side of the brazing material 8. On the outer side of the brazing material 8, a fillet 9 that was curved across the upper surface of the metallized layer 6 and the side surface of the flange 11 was formed along the entire circumference. At this time, the bolt 10 has the flange 11 parallel to the surface 3 of the substrate body 2 and the shaft portions 13 and 14 in a posture perpendicular to the surface 3 of the substrate body 2, and the brazing material 8 and the metallized layer 6. It was joined to the surface 3 of the substrate body 2 via
And after the brazing process which consists of the above 1st-5th steps, the 1st jig | tool 15 is removed from the surface 3 of the board | substrate body 2, and also from every bolt 10 bolted, it is 1st. The process of removing 2 jig | tool 20 was performed.
As a result, as shown in FIG. 8, the bolts 10 have their shaft portions (13, 14) on the surface of the plurality of metallized layers 6 formed on the surface 3 of the substrate body 2 via the brazing material 8. Thus, it was possible to manufacture the wiring board 1 bonded perpendicularly to the substrate 3.

  According to the manufacturing method of the wiring board 1 as described above, in the second step, the metallized layer 6 and the brazing material 7 are applied to the surface 3 of the substrate body 2 where the metallizing layer 6 on which the brazing material 7 is placed is located. A first jig 15 to be stored in the recess 18 is arranged. In the third step, the shaft parts (13, 14) of the bolt 10 are inserted in advance into the through holes 24 of the second jig 20, and the first jig 15 is inserted. The second jig 20 is attached to the bolt 10, and in the fourth step, the bolt 10 with the second jig 20 attached is inserted into the through hole 16 of the first jig 15, and the flange of the bolt 10 is inserted. 11 was placed on the brazing material 7. As a result, the bolt 10 brings its flange 11 into contact with the brazing material 7, and its shaft portion (13, 14) with respect to the surface 3 of the substrate body 2 by the second and first jigs 20, 15. And was restrained in a posture in which the axial direction was vertical. In this state, in order to melt and braze the brazing material 7 of the fifth step, the bolt 10 has its flange 11 parallel to the surface 3 of the substrate body and its shaft portions 13 and 14 vertical. In the posture, it was able to be joined on the metallized layer 6 through the melted and solidified brazing material 8.

Moreover, in the state where the center of gravity W of the bolt 10 to which the second jig 20 is attached has moved to the flange 11 side of the center of gravity 10 of the bolt 10 alone, the through hole 16 in the first jig 15 and Since the bolts 10 could be inserted into the continuous recesses 18, the brazing could be reliably performed with the shafts 13 and 14 placed in a vertical posture with respect to the surface 3 of the substrate body 10 without tilting the bolt 10.
Therefore, the wiring board 1 in which the bolt 10 having the flange 11 and the shaft portions (13, 14) is brazed and bonded in a required posture can be easily and reliably manufactured.
The metallized layer 6 and the brazing material 7 (8) are formed on the back surface 4 of the substrate body 2, and the bolt 10 is brazed to the back surface 4 side by using the first and second jigs 15 and 20 together. You may make it attach. The metallized layer 6 may be made of an Ag or Cu coating layer, a thin film formed by sputtering, or a plated layer, and the brazing material 7 may be made of an Ag-based braze. good.

FIG. 9 is a vertical sectional view showing the second jig 20a having a different form.
The second jig 20a is also made of the same carbon as described above. As shown in FIG. 9, the second jig 20a is a main body 21 having a cylindrical shape having two upper and lower stages, and a step positioned between the top surface and the outer surface 27. And a through hole 24 and a recess 26 similar to those described above. In the second jig 20 a, the position of the center of gravity (w 2) is closer to the flange 11 than in the case of the second jig 20, so the center of gravity W of the bolt 10 when it is attached to the bolt 10. As shown in FIG. 9, it moves further to the flange 11 side than the center of gravity w1 when the bolt 10 is alone. As a result, when the bolt 10 to which the second jig 20a is attached is inserted into the through hole 16 of the first jig 15, the situation in which the shaft portions 13 and 14 are inclined can be prevented more reliably. Note that the axial length h of the outer surface 27 of the second jig 20a is also 0.3 mm or more (for example, 1.0 mm).

FIG. 10 is a cross-sectional view showing a second jig 20b which is an applied form of the second jig 20, and a schematic view showing a third step of attaching the second jig 20b to the bolt 10. As shown in FIG.
The second jig 20b basically has the same form as the second jig 20, but a female screw 24b that can be screwed to the male screw 14 of the bolt 10 on the inner peripheral surface of the through hole 24. Is further engraved. As shown by the white arrow in FIG. 10, the male screw 14 of the bolt 10 is inserted into the through hole 24 so as to be screw-coupled to the female screw 24b of the second jig 20b. The jig 20b is attached to the bolt 10 (third step).
At this time, the bolt 10 and the second jig 20b can be screw-coupled coaxially, and the axial position where the male screw 14 of the bolt 10 and the female screw 24b of the second jig 20b are screw-coupled is arbitrary. Therefore, like the second jig 20, the bottom surface 29 can be lifted apart without contacting the top surface of the flange 11 of the bolt 10.

Next, as shown by a white arrow in FIG. 11, the bolt 10 to which the second jig 20b is attached penetrates the first jig 15 that has been previously arranged on the surface 3 side of the substrate body 2. Insert into the hole 16 (fourth step). At this time, as shown in the drawing, the male screw 14 of the bolt 10 and the female screw 24b of the second jig 20b are previously set so that the bottom surface 29 of the second jig 20b floats away from the upper surface of the flange 11 of the bolt 10. By adjusting the position where the two are screw-coupled, the entire length h (0.3 mm or more) along the axis (vertical) direction of the outer surface 27 of the second jig 20b It is located in the through hole 16. As a result, when the bolt 10 to which the second jig 20b is attached is inserted into the through hole 16 of the first jig 15, it is possible to reliably prevent the shaft portions 13 and 14 of the bolt 10 from being inclined. .
A female screw 24b may be provided on the inner peripheral surface of the through hole 24 of the second jig 20a. Further, the positioning jig for the bolt (metal fitting) 10 of the present invention is also constituted by the first jig 15 or any one of the second jigs 20a and 20b.

The present invention is not limited to the embodiments described above.
For example, the insulating material of the substrate body 2 may be a high-temperature fired ceramic other than alumina (for example, mullite or aluminum nitride), a glass-ceramic which is a kind of low-temperature fired ceramic, or an epoxy resin or the like. good. When the insulating material is a low-temperature fired ceramic or resin, the metallized layer 6 may be made of Ag or Cu.
In addition, the metal fittings that are the subject of the present invention are not limited to the bolt 10, and may be, for example, a normal bolt having a hexagonal bolt head or a flange, as long as it has both a flange and a shaft similar to the above. It may be something like a shaft.

Furthermore, the wiring board that is the subject of the present invention may have a form in which metal fittings are brazed and bonded to both the front and back surfaces of the board body.
The material of the first and second jigs is not limited to the carbon, but may be a ceramic having a relatively large heat capacity and a low coefficient of thermal expansion, or a similar metal or alloy.
In addition, the second jig is not limited to the jig 20, 20 a, 20 b of the above-described form as long as the center of gravity W moves to the flange side of the metal fitting when the second jig is attached to the metal fitting. The whole may have a vertically long, substantially conical shape.

  The present invention contributes to easily and reliably providing a wiring board in which a metal fitting having a flange and a shaft portion such as a stud bolt is joined in a required posture by brazing on at least one of a front surface and a back surface of a substrate body. Is possible.

1 ………………………… Wiring board 2 ………………………… Board body 3 ………………………… Front side 4 ………………………… Back side 6 ………………………… Metallized layer 7, 8 …………………… Brazing material 10 ………………………… Stud bolt
11 ……………………… Flange 13 ……………………… Neck (shaft)
14 ………………………… Male thread / Male thread (shaft)
15 ……………………… First jig 16 ……………………… Through hole 17 ……………………… Surface 18 ……………………… Recess d ………………………… Depth of recess 19 ……………………… Back side 20, 20a, 20b… Second jig 24 ……………………… Through hole 24b… ………………… Female thread 27 ……………………… Outer side h ………………………… Outer side length

Claims (5)

A method of manufacturing a wiring board in which a metal fitting made of a shaft portion and a flange is fixed to a brazing material on at least one of a front surface and a back surface of a substrate body made of an insulating material,
A first step of placing a sheet-like brazing material on the upper surface of the metallized layer formed on at least one of the front and back surfaces of the substrate body;
A second step of disposing a first jig having a through hole for accommodating the metallized layer and the brazing material on the side of the metallized layer on which the brazing material is placed, of the front and back surfaces of the substrate body;
A third step of inserting a shaft portion of the metal fitting into the through hole of the second jig having a through hole whose shape in plan view is similar to the through hole, and attaching the second jig to the metal fitting; ,
A fourth step of inserting the metal fitting to which the second jig is attached into the through hole from the upper side of the first jig, and placing the flange of the metal fitting on the brazing material;
A brazing process including, after the fourth step, a fifth step of dissolving the sheet-like brazing material;
Removing the second jig from the metal fitting and removing the first jig from the substrate body after the brazing step.
A method for manufacturing a wiring board. The through hole of the first jig includes a concave portion opened coaxially on one end side, and the metallized layer and the brazing material are accommodated in the concave portion.
The method for manufacturing a wiring board according to claim 1. The center of gravity of the metal fitting when the second jig is attached is located on the flange side of the metal fitting,
The method for manufacturing a wiring board according to claim 1, wherein: A jig for positioning a metal fitting used in the brazing step of the method of manufacturing a wiring board according to claim 1,
A first jig having a front surface and a back surface, a recess having a depth of 0.3 mm or more that opens to the back surface, and a through hole between the center portion and the surface of the bottom surface of the recess;
It is detachable with respect to the metal fitting, and is parallel and accessible in a length of 0.3 mm or more along the axial direction with the through hole through which the shaft portion of the metal fitting is inserted and the inner peripheral surface of the through hole. A second jig having an outer surface,
A metal fitting positioning jig characterized by the above. A male screw is engraved on the peripheral surface of the shaft portion of the metal fitting, and a female screw that is screw-coupled to the male screw is engraved on the inner peripheral surface of the through hole in the second jig. ing,
The metal fitting positioning jig according to claim 4, wherein:

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