JP2022128707A - Method for manufacturing joint body - Google Patents

Abstract

To provide a method for manufacturing a joint body that does not adversely affect the performance of an optical unit in a joint body in which at least two members are joined together by a joint material.SOLUTION: The present invention relates to a method for manufacturing a joint body 10 in which a first component 12 and a second component 11 are joined by a joint material 13, the method including the steps of: placing a first joint material 13a to a first joint surface 12a of the first component 12; placing a second joint material 13b on a second joint surface 12d of the first component 12; placing the second component 11 on the first component 12; melting and solidifying the first joint material 13a and the second joint material 13b and joining the first component 12 and the second component 11 to each other.SELECTED DRAWING: Figure 4

Description

The present invention relates to a method for manufacturing a joined body.

Techniques for joining two or more members with a joining material disposed between the members are widely used.

For example, in the optical unit of Patent Document 1, the cylindrical frame and the optical member are joined by housing the optical member in the cylindrical frame and soldering.

This optical unit uses a cylindrical frame and a cylindrical optical member, and a concave portion having an inner diameter larger than that of the other end is formed at one end of the cylindrical frame. When the optical member is joined to the cylindrical frame, the optical member is placed in the concave portion of the cylindrical frame so that the concave portion formed in the cylindrical frame faces upward. At this time, a gap is formed between the inner surface of the recess and the outer peripheral surface of the optical member. An annular bonding material made of a solder material is placed on the annular surface of the cylindrical frame so as to cover the upper opening of the gap. At this time, the tip surface of the optical member accommodated in the concave portion of the cylindrical frame protrudes from the annular surface of the cylindrical frame by a predetermined amount, and the annular bonding material placed on the annular surface of the frame is The inner peripheral surface of the optical member protruding from the frame is inserted so as to face the outer peripheral surface of the optical member with a predetermined gap.

Then, a load is applied to the optical member by a jig to press the optical member against the annular bottom surface of the concave portion of the cylindrical frame, and in this state, the optical member, the cylindrical frame and the bonding material are put into the heating furnace. When the bonding material is heated in the heating furnace, the bonding material melts, a predetermined amount of the melted solder material fills the gap, and the remaining solder material stays on the annular surface of the cylindrical frame. After that, the optical member and the cylindrical frame are bonded by cooling and solidifying the bonding material.

JP 2006-288423 A

When two members are joined by a joining material, if a load is applied to the optical member by a jig and the optical member is pressed against the annular bottom surface of the concave portion of the cylindrical frame, the surface of the optical member pressed by the jig is scratched. may be formed, and these scratches adversely affect the performance of the optical unit. In addition, when two members are joined by a joining material without applying a load to the optical member by a jig, the optical member joined to the cylindrical frame is inclined with respect to the annular bottom surface of the concave portion of the cylindrical frame. , which also adversely affects the performance of the optical unit.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a method of manufacturing a bonded body in which two or more members are bonded with a bonding material, which does not adversely affect the performance of an optical unit. It is in.

A method for manufacturing a joined body in which a first part and a second part are joined by a joining material, comprising: placing a first joining member on a first joining surface of the first part; placing a second joint member on a second joint surface of a first component; placing the second component on the first component; a step of melting and solidifying a second joining member to join the first component and the second component together. The first bonding surface is the tip surface of the first component, and the second bonding surface is the surface on which the second component is placed on the first component. Moreover, the thickness of the second joint member is thinner than the thickness of the first joint member. The melting point of the second joining member is lower than the melting point of the first joining member. Further, the first component is cylindrical with a concave portion at the tip of the first joint surface, the second component is cylindrical, and the second component is a portion of the first component. Housed in the recess. The first joining member and the second joining member are melted to join the annular bottom surface of the recess and one main surface of the second part, while the inner surface of the recess and the second part are joined together. The first component and the second component are joined by filling the space between the outer peripheral surfaces of the components.

According to the method for manufacturing a bonded body of the present invention, it is possible to provide a method for manufacturing a bonded body in which two or more members are bonded with a bonding material, which does not adversely affect the performance of the optical unit.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a diagram showing an embodiment of a joined body of the present invention, where (a) is a plan view of the joined body and (b) is a cross-sectional view taken along line AA of (a); FIG. 4 is a diagram showing a closing member, where (a) is a plan view of the closing member and (b) is a cross-sectional view taken along line AA of (a). FIG. 2 is a diagram showing a frame, where (a) is a plan view of the frame and (b) is a cross-sectional view taken along line AA of (a). It is a schematic diagram which shows the manufacturing method of a joined body. FIG. 4 is a diagram showing a joint member, where (a) is a plan view of the joint member and (b) is a cross-sectional view taken along line AA of (a).

A mode for carrying out the present invention will be described below with reference to the drawings. Also, in the drawings, in order to make each configuration easier to understand, the actual shape or actual structure may differ from the scale and number of each structure. 1A and 1B are diagrams showing an embodiment of the bonded body of the present invention, where (a) is a plan view of the bonded body and (b) is a cross-sectional view taken along the line AA of (a). The joined body 10 includes a tubular frame 12 (first part) and a cylindrical closing member 11 (second part) attached to one end of the frame 12 via a joint material 13 .

2A and 2B are views showing the closing member, in which FIG. 2A is a plan view of the closing member, and FIG. The closing member 11 is, for example, a cylindrical member made of a translucent member made of glass, crystal, or the like. Although not shown, a metal film for improving the wettability of the bonding material 13 is formed on the outer peripheral surface (side surface) of the closing member 11 and the surface of one main surface facing the bonding member 13b. The metal film is composed of a laminated film of a Ni film as a base layer and an Au film as a surface layer. The metal film is not limited to the laminated film of the Ni film and the Au film, and can be appropriately selected in consideration of the adhesion to the blocking member 11 and the bonding material 13 . In this embodiment, the closing member 11 has an outer diameter of 5 mm and a height of 1 mm, and the opposing main surfaces of the closing member 11 are flat.

3A and 3B are views showing the frame, FIG. 3A being a plan view of the frame, and FIG. The frame 12 has a tubular shape and is made of, for example, a member made of stainless steel. The frame 12 has a through hole 12b along the central axis, and an annular distal end surface 12a, which is the distal end portion of one end of the frame 12, has a diameter larger than the diameter of the through hole 12b. A coaxially formed recess 12c is provided. As a result, a flat annular bottom surface 12d is formed on the bottom surface of the recess 12c. 12 d of annular bottoms are locations of the difference of the inner surface of the recessed part 12c, and the outer diameter of the through-hole 12b. Although not shown, the annular tip surface 12a, the inner surface of the recess 12c, and the annular bottom surface 12d of the frame 12 are provided with coatings to improve wettability with the joining member 13a (first joining member) and the joining member 13b (second joining member). A metal film is formed for this purpose. The metal film is composed of a laminated film of a Ni film as a base layer and an Au film as a surface layer. The metal film is not limited to the laminated film of the Ni film and the Au film, and can be appropriately selected in consideration of the adhesion to the blocking member 11 and the bonding material 13 . In this embodiment, the outer diameter of the frame 12 is 6 mm and the height is 12 mm, the inner diameter of the recess 12c is 5.2 mm and the height is 1 mm, and the inner diameter of the through hole 12b is 4 mm. The outer diameter of the annular bottom surface 12d is 5.2 mm, which is the same as the inner diameter of the recess 12c. The length of one side of the annular bottom surface 12d is 0.6 mm.

In the joined body 10 , the closing member 11 is accommodated in the concave portion 12 c of the frame 12 , and the closing member 11 and the frame 12 are joined together with the joining material 13 . The bonding material 13 is, for example, AuGe solder or AuSn solder, and includes a metal film formed on the outer peripheral surface (side surface) of the closing member 11 and one main surface facing the bonding member 13b, and the annular tip of the frame 12. It spreads on the surface 12a, the inner surface of the recess 12c, and the metal film formed on the annular bottom surface 12d, bridges between the metal films, and sandwiches the joint between the closing member 11 and the frame 12. The closing member 11 and the frame 12 are joined together so that atmospheric components do not enter from one side, that is, no leakage occurs.

Next, a method for manufacturing the joined body 10 described above will be described. FIG. 4 is a schematic diagram showing a method for manufacturing a joined body. The joined body 10 is manufactured by the following steps.

[Frame placement step: FIG. 4(a)]
First, a tray 14 having an accommodating portion 14a corresponding to the outer shape of the frame 12 is prepared, and the frame 12 is placed upright in the accommodating portion 14a so that the concave portion 12c faces upward.

[Joining member placement step: FIG. 4(b)]
Next, the joining member 13a is placed on the annular end face 12a of the frame 12. As shown in FIG. In other words, the annular tip surface 12a is the first joint surface. Also, the joining member 13b is placed on the annular bottom surface 12d of the frame body 12 . In other words, the annular bottom surface 12d is the second joint surface. 5A and 5B are views showing the joint member, FIG. 5A being a plan view of the joint member, and FIG. The joining member 13a is, for example, an annular AuGe solder material (melting point is approximately 356° C.). The inner and outer diameters of the joining member 13a are the same as those of the annular tip surface 12a of the frame 12, and the inner diameter and the outer diameter of the annular joining member 13a are 5.2 mm and 6 mm, respectively. Moreover, the thickness is 0.2 mm. The joining member 13b is, for example, an annular AuSn solder material (melting point is approximately 280° C.). The inner and outer diameters of the bonding material 13b are the same as those of the annular bottom surface 12d of the frame 12, and the inner diameter and the outer diameter of the annular bonding member 13b are 4 mm and 5.2 mm, respectively. Moreover, the thickness is 0.1 mm.

For placing the joint member 13 a and the joint member 13 b on the frame 12 , first, the joint member 13 b is placed on the annular bottom surface 12 d of the frame 12 . As described above, since the outer diameter of the joint member 13b is the same as the inner diameter of the recess 12c of the frame 12, the joint member 13b placed on the annular bottom surface 12d of the frame 12 is positioned by the inner surface of the recess 12c. Next, a cylindrical jig 15 is inserted into the recess 12c of the frame 12. As shown in FIG. The jig 15 has an outer diameter slightly smaller than the inner diameter of the recess 12c and a height larger than the height of the recess 12c. It protrudes upward from 12a. Next, the inner peripheral surface of the joining member 13a is passed through the jig 15 projecting upward from the annular tip surface 12a, and the joining member 13a is placed on the annular tip surface 12a. By using the jig 15 in this way, the inner peripheral surface of the joining member 13a is positioned by the outer peripheral surface of the jig 15, and the joining member 13a can be accurately arranged on the annular distal end surface 12a. The jig 15 is removed from the concave portion 12c after placing the joining member 13a on the annular distal end surface 12a.

[Blocking member placement step: FIG. 4(c)]
Next, the closing member 11 is placed on the recess 12c of the frame 12. As shown in FIG. At this time, since the outer diameter of the closing member 11 is smaller than the inner diameter of the concave portion 12c, the closing member 11 is placed in the concave portion 12c with a predetermined gap formed between the outer peripheral surface of the closing member 11 and the inner surface of the concave portion 12c. are housed in

[Joining step: FIG. 4(d)]
Next, the tray 14 on which the frame 12, the closing member 11, the joint member 13a, and the joint member 13b are mounted is transported into a heating furnace and thrown into the heating furnace to melt the joint member 13a and the joint member 13b. Then, the closing member 11 and the frame 12 are joined by cooling and solidifying the joining member 13b. Each member put into the heating furnace is heated at a temperature equal to or higher than the melting point of the bonding member 13 a in, for example, an air atmosphere, a nitrogen atmosphere, or a vacuum atmosphere, and the bonding member 13 b that melts first is the annular bottom surface of the frame 12 . It wets and spreads on the metal film formed on 12d, the outer peripheral surface (side surface) of the closing member 11, and the respective metal films formed on the surface of one main surface facing the joining member 13b. Next, the molten bonding member 13a spreads over the metal film formed on the annular tip surface 12a and the metal film formed on the outer peripheral surface (side surface) of the closing member 11, and the predetermined amount of the molten bonding member 13a is , the gap formed between the inner surface of the recess 12c and the outer peripheral surface of the closing member 11 is filled. Also, the remaining joint member 13a that is not filled in this gap stays on the surface of the annular tip surface 12a. Thereafter, by cooling and solidifying the melted joint member 13a and joint member 13b, the joint member 13a and joint member 13b become the joint member 13, and the joined member 10 shown in FIG. is obtained.

In this joining step, as described with reference to FIG. 4, the joining member 13b has an inner diameter and an outer diameter that are smaller than those of the joining member 13a, and the thickness thereof is reduced to provide the following effects. Since the joint member 13b has an inner diameter and an outer diameter smaller than those of the joint member 13a and a thickness smaller than those of the joint member 13a, it melts before the joint member 13a. The bonding member 13b, which melts first, has an effect of spreading thinly and evenly on the metal film formed on one main surface of the closing member 11 facing the bonding member 13b and the annular bottom surface 12d. As a result, one main surface of the closing member 11 is flatly joined to the annular bottom surface 12d. Accordingly, it is possible to provide a method for manufacturing a joined body that does not adversely affect the performance of the optical member. Note that the melting point of the joining member 13b at this time is lower than the melting point of the joining member 13a.

If the joint member 13b is thicker than the joint member 13a, the metal film formed on one main surface of the closing member 11 facing the joint member 13b and the annular bottom surface 12d will not spread thinly and evenly. Therefore, the closing member 11 cannot be flatly joined to the annular bottom surface 12d.

In addition, in this joining step, as described with reference to FIG. 4, the joining member 13b has a lower melting point than that of the joining member 13a, thereby providing the following effects. Since the melting point of the joining member 13b sandwiched between the annular bottom surface 12d of the frame 12 and one main surface of the closing member 11 is lower than the melting point of the joining member 13a placed on the annular tip surface 12a, The joint member 13b melts before the joint member 13a. The joining member 13b, which melts first, wets and spreads on the metal film formed on one main surface of the closing member 11 facing the joining member 13b and the annular bottom surface 12d. At this time, one main surface of the closing member 11 is joined while being pressed against the annular bottom surface 12 d by the own weight of the closing member 11 . As a result, one main surface of the closing member 11 is flatly joined to the annular bottom surface 12d. Accordingly, it is possible to provide a method for manufacturing a joined body that does not adversely affect the performance of the optical member. Note that the thickness of the joint member 13b at this time is thinner than the thickness of the joint member 13a.

If the melting point of the joining member 13b is higher than that of the joining member 13a, the joining member 13b does not melt before the joining member 13a. However, before joining, a predetermined amount of the melted joining member 13a is filled in the gap formed between the inner surface of the recess 12c and the outer peripheral surface of the closing member 11, and cooled and solidified, so that the closing member 11 has an annular bottom surface 12d. cannot be flatly bonded to

As described above, in the method for manufacturing a bonded body of the present invention, the thickness and melting point of each of the bonding members are varied to control the bonding member 13b to melt before the bonding member 13a, thereby preventing adverse effects on the performance of the optical member. It is possible to provide a method for manufacturing a conjugate that does not give. In addition to the means described above, the following means are available as means for controlling the joining member 13b to melt earlier than the joining member 13a. When the thickness of the joining member 13b is the same as the thickness of the joining member 13a, the melting point of the joining member 13b should be lower than the melting point of the joining member 13a. When the melting point of the joining member 13b is the same as the melting point of the joining member 13b, the thickness of the joining member 13b may be made thinner than the thickness of the joining member 13a.

As described above, the method for producing a joined body according to the present invention has been described based on the examples, but the scope of the present invention is not limited to the above-described examples, and can be changed arbitrarily within the scope of the technical idea of the present invention. It is possible. For example, although AuSn solder is used for the joining member 13b, the solder is not limited to AuSn solder, and AgSn solder (melting point is about 221° C.) may be used. Also, as an example of the joined body 10, an example in which the closing member 11 and the frame body 12 are joined is shown, but the joined body of the present invention is not limited to joining the closing member 11 and the frame body 12, and may It can be applied to any joined body in which two or more members are joined together. Also, the frame may be, for example, a prism.

REFERENCE SIGNS LIST 10 joined body 11 closing member 12 frame 12a annular tip surface 12b through hole 12c recess 12d annular bottom surface 13 joining material 13a joining member (first joining member)
13b joining member (second joining member)
14 Tray 14a Storage Part 15 Jig

Claims (6)

A method for manufacturing a joined body in which a first part and a second part are joined with a joining material,
placing a first joint member on the first joint surface of the first component;
placing a second joint member on the second joint surface of the first component;
placing the second component on the first component;
and melting and solidifying the first joining member and the second joining member to join the first part and the second part. . The first bonding surface is a front end surface of the first component, and the second bonding surface is a surface on which the second component is placed on the first component. Item 2. A method for manufacturing a joined body according to item 1. 3. The method of manufacturing a joined body according to claim 1, wherein the thickness of the second joint member is thinner than the thickness of the first joint member. 4. The method for manufacturing a joined body according to claim 1, wherein the melting point of the second joining member is lower than the melting point of the first joining member. The first component is cylindrical with a concave portion at the tip of the first joint surface,
the second part is cylindrical,
5. The method of manufacturing a joined body according to claim 1, wherein the second component is accommodated in the recess of the first component. The first joining member and the second joining member are melted to join the annular bottom surface of the recess and one main surface of the second part, while the inner surface of the recess and the second part are joined together. 6. The method of manufacturing a joined body according to claim 5, wherein the first component and the second component are joined by filling a space between the outer peripheral surfaces of the components.

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