JP4185403B2 - Semi-rigid coaxial cable assembly and manufacturing method thereof - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a semi-rigid coaxial cable assembly and a manufacturing method thereof, and more particularly to a semi-rigid coaxial cable assembly capable of automatic mounting and reflow soldering (reflow mounting) and a manufacturing method thereof.
[0002]
[Prior art]
As electronic devices such as mobile communication devices and information processing devices become smaller and lighter, it is required to mount electronic components on a printed circuit board with high density. As technologies for mounting electronic components at high density, there are automatic mounting that automatically mounts on a printed circuit board using an electronic component mounting apparatus, and reflow soldering that performs soldering using a reflow furnace. In reflow soldering, a solder paste is applied to a soldering land, which is a land electrode, for example, on a printed circuit board by a solder feeder such as printing or a dispenser. After mounting an electronic component or the like to be mounted thereon on a predetermined position, the printed circuit board on which the component is mounted is heated in a reflow furnace. The solder paste on the soldering land is melted (reflowed), and after cooling, an electronic component or the like is soldered on the soldering land.
[0003]
By the way, a semi-rigid coaxial cable excellent in high-frequency performance is widely used as a high-frequency transmission path for small electronic components. With this semi-rigid coaxial cable, if the above-described automatic mounting and reflow soldering can be performed, productivity is improved and cost is reduced.
[0004]
[Patent Document 1]
JP 2002-352638 A (2nd page)
[0005]
[Problems to be solved by the invention]
However, the semi-rigid coaxial cable has been manually mounted on the printed circuit board. That is, as shown in FIGS. 5 and 6, the semi-rigid coaxial cable 50 is formed in a circular cross-section by sequentially providing at least an insulator 52 and an outer conductor 53 coaxially on the outer periphery of the center conductor 51. , Easy to roll in the circumferential direction.
[0006]
For this reason, in automatic mounting, if the semi-rigid coaxial cable is placed in a flat shape when the semi-rigid coaxial cable is held by an arm of an electronic component mounting apparatus or the like, the semi-rigid coaxial cable may roll and be difficult to grasp. Also, when the semi-rigid coaxial cable held by the arm of the electronic component mounting device is placed on the soldering land of the printed circuit board and the semi-rigid coaxial cable is released from the arm etc., the surface (mounting surface) of the soldering land becomes Since it is formed in a flat shape, the semi-rigid coaxial cable may roll from the soldering land.
[0007]
Also, in the case of reflow soldering, even if a semi-rigid coaxial cable is accurately mounted on the printed circuit board, the semi-rigid coaxial cable is likely to roll in order to further transport the printed circuit board mounted with the semi-rigid coaxial cable etc. to the reflow furnace. Since the vibration or the like is applied to the semi-rigid coaxial cable on the printed circuit board during the conveyance, the semi-rigid coaxial cable may roll from the soldering land.
[0008]
Therefore, the semi-rigid coaxial cable has been manually mounted on the printed circuit board.
[0009]
The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a semi-rigid coaxial cable assembly capable of automatic mounting and reflow soldering (reflow mounting) and a method for manufacturing the same.
[0010]
[Means for Solving the Problems]
In order to achieve the above object, a semi-rigid coaxial cable assembly of the present invention is a semi-rigid coaxial cable assembly in which a central conductor is disposed at the center of a cable body having a circular cross section, and both ends of the central conductor are exposed. Then, both ends of the cable body are crushed into non-circular shapes to form non-circular portions.
[0011]
Thus, when the cable body is mounted on the board by crushing both ends of the cable body into a non-circular shape, when the non-circular part comes into contact with the board, for example, a soldering land, Since the cable body is difficult to roll, it can be automatically mounted on the board.
[0012]
In addition, when this cable body is placed on the surface of a flat plate, for example, non-circular portions are formed at both ends, so that when a external force is not applied to the cable body, a substantially specific peripheral surface faces downward. Will be in a stationary state. In other words, when the cable main body is placed, even if the specific peripheral surface is not down, the cable main body rolls along the circumferential direction to be in a stationary state with the specific peripheral surface down. This stationary state is a state in which the cable body is difficult to roll. Therefore, the cable body can be placed in a stationary state that is difficult to roll on the substrate, for example.
[0013]
Therefore, it is possible to obtain a semi-rigid coaxial cable assembly capable of automatic mounting and reflow soldering (reflow mounting).
[0014]
The non-circular portion is axisymmetric to a first line extending along the radial direction of the cable body, and is a second line that is orthogonal to the first line and extends along the radial direction of the cable body. It is also preferable that they are line-symmetric and have non-circular shapes in which the first width along the first line and the second width along the second line are different.
[0015]
It is preferable that the non-circular portion is formed in an approximately elliptical shape or a flat shape.
[0016]
As described above, since the non-circular portions are each formed in an elliptical shape or a flat shape, it is possible to easily grasp whether the semi-rigid coaxial cable assembly is difficult to roll or easy to roll.
[0017]
It is preferable that the non-circular portion bends along a width direction in which a dimension is short among the first width and the second width.
[0018]
As a result, the cable body can be mounted on the substrate, for example, in a state in which the cable body is more difficult to roll.
[0019]
The non-circular portion is preferably formed so that a distance between the exposed central conductor and the soldering land of the substrate is 0.2 mm or less when the cable body is mounted on the substrate. .
[0020]
As described above, when the distance between the center conductor and the soldering land is 0.2 mm or less, the solder paste is applied on the soldering land in the reflow soldering, and the center conductor comes into contact with the solder paste. Can be reliably soldered.
[0021]
Further, in the method for manufacturing a semi-rigid coaxial cable assembly according to the present invention, both ends of the central conductor disposed at the center of the cable body having a circular cross section are exposed, and both ends of the cable body are placed on the board. When mounted on, a non-circular portion is formed by crushing and bending by bending press processing so that the distance between the exposed central conductor and the substrate is 0.2 mm or less.
[0022]
In this way, both ends of the cable body are crushed by bending press processing and bent to form a non-circular part, so that semi-rigid coaxial that can be automatically mounted and reflow soldered with high productivity, low cost, and accuracy. A cable assembly can be manufactured.
[0023]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, a semi-rigid coaxial cable assembly and a method for manufacturing the semi-rigid coaxial cable assembly of the present invention will be described with reference to the drawings.
[0024]
(Semi-rigid coaxial cable assembly)
FIG. 1 shows a first semi-rigid coaxial cable assembly of the present invention. FIG. 2 is a view showing a second semi-rigid coaxial cable assembly of the present invention. FIG. 3 is a side view showing a state where the second semi-rigid coaxial cable assembly of the present invention is reflow-soldered on a printed circuit board.
[0025]
In the semi-rigid coaxial cable assembly of the present invention, as shown in FIGS. 1 to 3, both ends of the center conductor 3 disposed at the center of the cable body 2 having a circular cross section are exposed, and the cable body 2. The both ends of each are crushed into a non-circular shape to form a non-circular portion 6.
[0026]
The cable body 2 of the semi-rigid coaxial cable 1 constituting the present invention is not particularly limited, and a generally known semi-rigid coaxial cable is used. That is, the cable body 2 is a cable having a structure in which an insulator 4 and an outer conductor 5 are sequentially laminated on the outer periphery of a central conductor (inner conductor) 3 on the same axis.
[0027]
The center conductor 3 is not particularly limited as long as it is used as the center conductor (inner conductor) of the semi-rigid coaxial cable. For example, a silver-plated copper-clad steel wire having an outer diameter of 0.15 to 0.20 mm is used. It is done.
[0028]
The insulator 4 is preferably formed of an insulating material that can withstand heating in a reflow furnace, such as an insulating resin having a low dielectric constant (such as a fluororesin such as PTFE (polytetrafluoroethylene)). The thickness (layer thickness) of the insulator 4 is not particularly limited as long as it can function as an insulator of a semi-rigid coaxial cable, and is, for example, 0.1 to 0.3 mm. The insulator 4 is formed by, for example, extruding and coating an insulating resin having a low dielectric constant, or winding an insulating tape made of a low dielectric constant resin. Specifically, for example, PTFE is paste-extruded on the outer periphery of the central conductor 3, and this is sintered to form a porous low dielectric constant insulator having a thickness of 0.20 mm. Further, a PTFE tape having a thickness of 60 μm and a width of 4 mm can be wound around the outer periphery of the central conductor with a 2/3 lap to form a porous insulator having a thickness of 0.2 mm.
[0029]
The outer conductor 5 is formed of a conductive material such as a metal such as copper. For example, the outer conductor 5 is subjected to electroless plating on the outer periphery of the insulator 4 using an electroless nickel-phosphorus (Ni-P) plating solution to deposit Ni-P on the surface of the insulator 4, thereby electroless plating metal. Provide a layer. By providing an electroplated copper layer on the electroless plated metal layer using a bright copper sulfate plating solution, an outer conductor having a thickness of about 60 μm composed of the electroless plated metal layer and the electroplated copper layer is formed.
[0030]
An external insulator or other coating layer may be provided on the external conductor 5. For example, the external insulator is preferably formed by extruding and coating an insulating material that can withstand heating in a reflow furnace on the outer periphery of the outer conductor 5.
[0031]
At both ends of the cable body 2, the insulator 4 extends from the external conductor 5, and the center conductor 3 extends from the insulator 4. That is, the cable body 2 is one in which both ends of the insulator 4 and both ends of the center conductor 3 are exposed. For example, both ends of the semi-rigid coaxial cable are processed to be stepped and the insulator 4 and the center conductor 3 are removed. Can be exposed. Both ends of the cable body 2 are crushed in substantially the same non-circular shape or substantially the same non-circular shape and in the same direction to form a non-circular portion 6.
[0032]
The non-circular portion 6 may be formed at both end portions of the exposed insulator 4, but is preferably formed at both end portions of the exposed outer conductor 5.
[0033]
The shape of the non-circular portion 6 is not particularly limited as long as it is a non-circular shape formed by crushing the cable body 2, but is preferably symmetrical with respect to the first line A extending along the radial direction of the cable body 2. The second line B that is orthogonal to the first line A and extends along the radial direction of the cable body 2 is also symmetric with respect to the second line B, and the first width a and the first width A along the first line A The non-circular shape may be different from the second width b along the two lines B.
[0034]
That is, the non-circular portion 6 includes, for example, the first line A extending along a direction substantially orthogonal to the crushing direction, the second line extending along the crushing direction, and the first width a. Is preferably formed in a non-circular shape having a dimension longer than the second width b, and specifically, for example, it is particularly preferably formed in a substantially elliptical shape or a flat shape as illustrated.
[0035]
Further, the non-circular portion 6 is formed by crushing and deforming the cable body 2, but the deformation cannot be generally described depending on the material of the outer conductor 5 and the insulator 4, but mainly the outer conductor 5 is deformed. It is preferable that this is performed. In other words, it is preferable to determine the materials of the insulator 4 and the outer conductor 5 so that the outer conductor 5 is mainly deformed to form the non-circular portion 6 with less deformation of the insulator 4.
[0036]
The length of the non-circular portion 6 (length in the longitudinal direction) is not particularly limited, but is 10 mm or less from the end of the external conductor 5, and the external conductor 5 is electrically connected to the soldering land 12 of the printed circuit board 10. In the case of connection, it is preferable that the size is equal to or larger than the width of the corresponding soldering land 12 because most of them are both end portions of the outer conductor 5.
[0037]
The thickness (second width b) of the non-circular portion 6 is such that when the cable body 2 is mounted on the printed circuit board 10, the distance between the opposing printed circuit board 10 and the soldering land 12 is preferably 0.2 mm or less, Particularly preferably, it is formed to have a dimension of 0.1 mm or less.
[0038]
The non-circular portion 6 may be formed by any means, but is preferably formed by pressing.
[0039]
Further, the non-circular portion 6 is formed in a non-circular shape, but as shown in FIG. 2, along the width (second width in the illustrated example) direction in which the dimension is short between the first width and the second width. It is preferable to be bent.
[0040]
The bend of the non-circular portion 6 may be formed in any way, and may be formed by bending or curving as shown in the figure. In this case, for example, the non-circular portion 6 is formed by pressing. You may make it form.
[0041]
Further, the non-circular portion 6 has an interval between the exposed central conductor 3 and the soldering land 11 of the printed circuit board 10 of 0.2 mm or less, particularly when the cable body 2 is mounted on the printed circuit board 10. Preferably, it is formed to have a dimension of 0.1 mm or less, and most preferably a size where the center conductor and the soldering land are in contact with each other.
[0042]
Next, a case where the semi-rigid coaxial cable assembly 1 is mounted on the printed circuit board 10 and reflow soldering is performed will be described.
[0043]
On the soldering lands 11 and 12 of the printed circuit board 10, a solder paste having a thickness of 0.1 to 0.2 mm, for example 0.2 mm, is applied to the area of the soldering lands 11 and 12 by a solder supply device such as printing or a dispenser. Correspondingly applied.
[0044]
The semi-rigid coaxial cable assembly 1 is mounted on the printed circuit board 10. As shown in FIG. 3, the mounting is such that the non-circular portions 6 (both end portions of the exposed outer conductor) at both ends of the cable body 2 face the arbitrary soldering lands 12 and the center conductor 3 The exposure is performed so that both exposed end portions face the arbitrary soldering lands 11. Further, the semi-rigid coaxial cable assembly 1 (cable body 2) is extended along the front in the bending direction when one circumferential surface (a non-circular portion is formed by bending) extending in the second width b direction. It is mounted so that the surface of the printed circuit board 10 is in contact with the surface of the printed circuit board 10. Thereby, the cable main body 2 can be mounted on the printed circuit board 10 with little rolling.
[0045]
That is, when the non-circular portion 6 is in contact with the soldering land at the time of mounting, the cable body does not easily roll.
[0046]
Further, when the cable body 2 is placed on the surface of a flat plate, for example, both ends are crushed into a non-circular shape (non-circular portions 6 are formed), and an external force acts on the cable body 2. In a non-contained state (a natural state), it becomes a stationary state with a specific peripheral surface down. This specific peripheral surface is the one peripheral surface (the peripheral surface along the front in the bending direction when the non-circular portion 6 is bent). At this time, since the first line A of the cable body 2 is parallel or substantially parallel to the horizontal direction, the non-circular portion 6 has both ends in the horizontal direction from the center (both ends on the first line A). Since the weight until is almost the same, it is difficult to roll along the circumferential direction. For example, if the cable body 2 is not mounted with a specific circumferential surface down and the first line A is not parallel or substantially parallel to the horizontal direction, both ends in the horizontal direction from the center of the non-circular portion 6 Since the weight up to the part is different, the heavier one is turned to try to go up and the lighter one goes down. And when both weights become substantially the same, the rotation stops. This state is a stationary state in which the specific peripheral surface is down, and the first line A is in a state parallel or substantially parallel to the horizontal direction.
[0047]
Therefore, the cable body 2 can be mounted on the printed circuit board 10 so as not to roll.
[0048]
At this time, if the non-circular portion 6 is formed to be bent, the cable body 2 has an increased force to maintain a stationary state with one peripheral surface down, so that the cable body 2 is further rolled onto the printed circuit board 10. It can be mounted with difficulty.
[0049]
Next, this printed circuit board (printed circuit board on which electronic components or the like to be mounted are mounted at predetermined positions) 10 is heated using a reflow furnace. The solder paste on the soldering lands 11 and 12 is melted (reflowed), and after cooling, the semi-rigid coaxial cable assembly 1 is soldered onto the predetermined soldering lands 11 and 12. In FIG. 3, reference numeral 13 denotes solder.
[0050]
At this time, if the distance between the center conductor 3 and the soldering land 11 is 0.2 mm or less, the center conductor 3 comes into contact with the solder paste, so that the solder connection can be performed more reliably.
[0051]
Therefore, since the semi-rigid coaxial cable assembly 1 of the present invention can be mounted on the printed circuit board 10 even if it is a straight product (straight), it can be automatically mounted and reflow soldered (reflow mounted). is there. The semi-rigid coaxial cable assembly 1 can be mounted on the printed circuit board 10 by reflow soldering, for example, as a high-frequency transmission path for small electronic components. That is, since it can be soldered together with other electronic components, the productivity of the printed circuit board 10 is improved and the cost is reduced, and the semi-rigid coaxial cable assembly 1 of the present invention has high industrial value. .
[0052]
Moreover, since the semi-rigid coaxial cable assembly 1 of the present invention has the non-circular portions 6 formed at both ends of the cable body 2, respectively, it is difficult to roll without impairing electrical characteristics. That is, if the entire cable body is formed as a non-circular portion, it will be difficult to roll, but the insulator may be deformed to some extent, and the electrical characteristics may be deteriorated. In addition, if the non-circular part is formed in a part of the cable body, the electrical characteristics will not be impaired. For example, even if the non-circular part is formed in a part of the central part of the cable body, the cable body rolls. Cheap. For this reason, by forming the non-circular portions 6 at both ends of the cable body 2, the cable body 2 becomes difficult to roll and the electrical characteristics are not impaired.
[0053]
In addition, when the non-circular portion 6 is formed in an elliptical shape or a flat shape, it is possible to easily grasp whether the semi-rigid coaxial cable assembly 1 is difficult to roll or easy to roll.
[0054]
(Method for manufacturing semi-rigid coaxial cable assembly)
Next, a manufacturing method of the semi-rigid coaxial cable assembly will be described. The method for manufacturing a semi-rigid coaxial cable assembly according to the present invention is a method for manufacturing a semi-rigid coaxial cable assembly having the above-described configuration, characterized by both ends of the cable body 2 (both ends of the exposed external conductor 5). Is a pressing step in which the non-circular portion 6 is formed by crushing and bending by bending press processing. The other manufacturing steps for manufacturing the semi-rigid coaxial cable assembly 1 and the steps for forming the semi-rigid coaxial cable (cable body), the insulator and the central conductor are the same as those conventionally known.
[0055]
In the pressing step, any mold may be used for pressing, for example, a mold composed of a pair of upper mold 20 and lower mold 21 as shown in FIG. Moreover, the press machine (not shown) which performs a press is not specifically limited, For example, a crank press, a link motion press, a cam press, a screw press, a hydraulic press, a pneumatic press, a foot press, a hand press etc. are mentioned.
[0056]
When performing pressing, for example, as shown in the drawing, a semi-rigid coaxial cable (cable body 2) with the insulator 4 and the center conductor 3 exposed on the lower mold 21 is placed at a predetermined position. The upper mold 20 is fitted and pressed. As a result, both ends of the cable body 2 (both ends of the exposed outer conductor 5) are crushed in an almost elliptical shape, and the center conductor 3 and the print are printed when the cable body 2 is placed on the printed circuit board 10. The non-circular portion 6 is formed by bending forward in the fitting direction (crushing direction) so that the distance from the substrate 10 (soldering land 11) is 0.2 mm or less.
[0057]
As described above, the method for manufacturing a semi-rigid coaxial cable assembly according to the present invention can form the non-circular portion 6 by a general-purpose pressing process, so that the semi-rigid coaxial cable assembly 1 capable of automatic mounting and reflow soldering is provided. It can be manufactured with high productivity, low cost and high accuracy.
[0058]
【Example】
Hereinafter, the present invention will be described in more detail with reference to Examples and Comparative Examples.
[0059]
(Example)
First, a semi-rigid coaxial cable having a center conductor having an outer diameter (φ) of 0.16 mm, an insulator having an outer diameter (φ) of 0.5 mm, and an outer conductor having an outer diameter (φ) of 0.62 mm is cut to a length of 50 mm. . Both ends of the cut semi-rigid coaxial cable are processed to be stepped to expose the insulator and the central conductor.
[0060]
The semi-rigid coaxial cable assembly was manufactured by press bending and crushing the semi-rigid coaxial cable to form a non-circular portion. When the semi-rigid coaxial cable assembly is mounted on the printed board, the non-circular portion formed by this processing has a distance of 0.1 mm from the soldering land of the printed board.
[0061]
Next, a solder paste was printed and applied to the printed circuit board on the soldering lands at the same amount of 150 μm. The semi-rigid coaxial cable assembly obtained by using a component mounter at a predetermined position on this printed circuit board is placed so that the circumferential surface extending along the front of the noncircular portion in the bending direction is downward (the tip of the central conductor). And soldering land so that they face each other). Other electronic components were also mounted at predetermined positions on the printed circuit board using a component mounting machine.
[0062]
The printed circuit board on which the semi-rigid coaxial cable assembly was mounted was heated using a reflow furnace to melt the solder paste. In this heating, for example, preheating is performed at about 150 ° C. for 60 seconds, and then main heating at about 230 ° C. or higher (main heating at a peak temperature of about 250 ° C.) is performed for 30 seconds. The entire heating time is 120 to 180 seconds. After heating, the printed circuit board was cooled to solidify the solder, and soldering was performed.
[0063]
The semi-rigid coaxial cable assembly on the printed circuit board on which this soldering was performed was soldered without being displaced from the predetermined position where it was mounted. Also, solder fillets are formed at both ends of the center conductor, and a good solder connection with the soldering land has been made even with a conventional solder amount. In addition, other electronic components were also well soldered.
[0064]
(Comparative Example 1)
A plurality of semi-rigid coaxial cables in which both ends are processed to be stepped without forming a non-circular portion by the press in the above-described embodiment are directly placed at predetermined positions on the printed circuit board as shown in FIG. Except for mounting, reflow and cooling were performed under the same conditions as in the example, and soldering was performed.
[0065]
Other electronic components on the printed circuit board on which this soldering was performed had good solder connections, but the semi-rigid coaxial cable was not soldered because it was displaced from the predetermined position on which it was mounted. Some soldering was performed without shifting in position. The center conductors at both ends of the semi-rigid coaxial cable that had been soldered had insufficient solder connection (open failure) as shown in the right part of FIG.
[0066]
(Comparative Example 2)
Without forming the non-circular portion by the press machine in the above-described embodiment, a plurality of semi-rigid coaxial cables whose both end portions are processed to be stepped are placed as they are at predetermined positions on the printed circuit board and soldered. Soldering was performed by reflowing and cooling under the same conditions as in the example except that the solder paste was printed and applied in a thickness of 250 μm on the attachment land.
[0067]
The semi-rigid coaxial cable on the printed circuit board on which this soldering was performed was not soldered because it was displaced from the predetermined position on which it was mounted, and the semi-rigid coaxial cable was not soldered at the predetermined position. . The center conductors at both ends of the semi-rigid coaxial cable that had been soldered were soldered as shown in the left part of FIG. 6, but solder balls were scattered around the periphery. In addition, the solder connection part of other electronic parts has an excessive amount of solder, and the solder balls are scattered and many parts are short-circuited by the solder (short circuit failure, solder ball failure).
[0068]
【The invention's effect】
According to the semi-rigid coaxial cable assembly of the present invention, the both ends of the cable body are each crushed into a non-circular shape to form a non-circular portion, so that a semi-rigid coaxial cable assembly capable of automatic mounting and reflow soldering is obtained. .
[0069]
According to the manufacturing method of the semi-rigid coaxial cable assembly of the present invention, since the non-circular portion is formed by pressing, a semi-rigid coaxial cable assembly capable of automatic mounting and reflow soldering is manufactured with high productivity, low cost, and high accuracy. be able to.
[Brief description of the drawings]
FIG. 1 is a view showing a first semi-rigid coaxial cable assembly of the present invention, in which (a) is a side view and (b) is a front view.
FIG. 2 is a view showing a second semi-rigid coaxial cable assembly of the present invention, in which (a) is a side view and (b) is a front view.
FIG. 3 is a side view showing a state in which the second semi-rigid coaxial cable assembly of the present invention is reflow-soldered on a printed circuit board.
FIGS. 4A and 4B are diagrams showing an example of manufacturing the second semi-rigid coaxial cable assembly of the present invention by pressing, in which FIG. 4A is a side view, and FIG. 4B is a state of the semi-rigid coaxial cable assembly before pressing. FIG.
FIG. 5 is a side view showing a state in which a conventional semi-rigid coaxial cable assembly is mounted on a printed circuit board.
FIG. 6 is a side view showing a state where a conventional semi-rigid coaxial cable assembly is reflow-soldered on a printed circuit board.
[Explanation of symbols]
1 Semi-rigid coaxial cable assembly
2 Cable body
3 Central conductor
4 Insulator
5 Outer conductor
6 Non-circular part
10 Printed circuit board
11 Soldering land
12 Soldering land
13 Solder
20 Upper mold
21 Lower mold

Claims (6)

A semi-rigid coaxial cable assembly in which a central conductor is disposed at a central portion of a cable body having a circular cross section, and both ends of the central conductor are exposed. A semi-rigid coaxial cable assembly characterized by forming a non-circular portion. The non-circular portion is axisymmetric to a first line extending along the radial direction of the cable body, and is a second line that is orthogonal to the first line and extends along the radial direction of the cable body. The semi-rigid coaxial cable assembly according to claim 1, wherein the semi-rigid coaxial cable assembly is formed in a non-circular shape that is also axisymmetric and has different first and second widths along the first line. . The semi-rigid coaxial cable assembly according to claim 2, wherein the non-circular portion is formed in a substantially elliptical shape or a flat shape. 4. The semi-rigid coaxial cable assembly according to claim 2, wherein the non-circular portion is bent along a width direction of which the dimension is short among the first width and the second width. 5. 5. The non-circular portion is formed so that a distance between the exposed central conductor and a soldering land of the substrate is 0.2 mm or less when the cable body is mounted on the substrate. Semi-rigid coaxial cable assembly as described in. Both ends of the central conductor disposed at the center of the cable body having a circular cross section are exposed, and when both ends of the cable body are mounted on the substrate, the exposed center conductor and the A method for producing a semi-rigid coaxial cable assembly, wherein a non-circular portion is formed by crushing and bending by a bending press process so that a distance from a substrate is 0.2 mm or less.

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