Probe for spring needle and spring needle provided with same

Abstract

The invention relates to a probe for a spring needle and the spring needle with the same. The present invention relates to a probe for a spring needle, and more particularly, to a probe for a spring needle, which can be reliably fixed to a cylinder of a spring needle without shaking or rotation, and a spring needle provided with the same. The present invention provides a probe for a spring needle, a part of which is inserted into a cylinder of the spring needle, the probe for the spring needle comprising: at least one contact part having a sharp end in contact with an object to be inspected; a first main body part which is disposed outside the cylinder body and which has one end coupled to the other end of the contact part; a second main body part which is disposed inside the cylindrical body and which has one end coupled to the other end of the first main body part; a third body part which is disposed inside the cylinder, has one end coupled to the other end of the second body part, and has a serrated wheel shape; and a fourth main body part which is disposed inside the cylindrical body and which has one end coupled to the other end of the third main body part. The probe for a spring needle according to the present invention is provided with a third main body part having a serrated wheel shape, so that the recessed part of the cylinder of the spring needle and the serrations of the third main body part mesh with each other. Therefore, the probe for the spring needle does not rotate relative to the cylinder.

Description

Technical Field

[0001] The present invention relates to a probe for a spring pin and a spring pin having the same, and more particularly to a probe for a spring pin that can be accurately fixed to a cylinder of a spring pin without shaking or rotating and a spring pin having the same. Background Art

[0002] During or after the production of an inspection object such as a semiconductor element or a display device, a test socket is used to electrically connect the inspection object to a test device in order to confirm the performance of the inspection object.

[0003] The test socket includes a plurality of spring pins for electrically connecting the terminals of the inspection object and the pads of the test equipment.

[0004] Korean Patent No. 10-2216143 and Korean Patent Publication No. 10-2019-0010674 disclose a spring pin having a probe part, a conductive cylindrical plunger, and a tube wrapping the probe part and the plunger. An elastic part providing elastic force for biasing the probe part and the plunger toward the outside of the tube is arranged inside the tube.

[0005] In order to fix the probe component in the tube, the existing spring pin adopts a method of inserting a part of the probe component into the tube to make the tube concave, so that the probe component is stuck in the concave part of the tube.

[0006] However, the probe member fixed in this way may rotate or shake relative to the tube. If the probe member rotates during measurement, it may be difficult to perform accurate measurement, and if rotation or shaking occurs repeatedly, the probe member may also be separated from the tube.

[0007] [Prior art literature]

[0008] Korean authorized patent 10-2216143

[0009] Korean Publication Patent 10-2019-0010674 Summary of the invention

[0010] Technical issues

[0011] The present invention aims to improve the above-mentioned problem, and an object of the present invention is to provide a spring pin probe that can be securely fixed to a cylinder of a spring pin without shaking or rotating, and a spring pin having the same.

[0012] Technical Solution

[0013] In order to achieve the above-mentioned purpose, the present invention provides a probe for a spring needle, a part of which is inserted into the cylinder of the spring needle, and the spring needle probe is characterized in that it includes: at least one contact portion, which has a sharp end that contacts the inspected object; a first main body portion, which is arranged outside the cylinder and is connected to the other end of the contact portion at one end; a second main body portion, which is arranged inside the cylinder and is connected to the other end of the first main body portion at one end; a third main body portion, which is arranged inside the cylinder, is connected to the other end of the second main body portion at one end, and has a sawtooth shape; and a fourth main body portion, which is arranged inside the cylinder and is connected to the other end of the third main body portion at one end.

[0014] Furthermore, the provided spring needle probe is characterized in that the saw teeth of the third body portion are engaged with the recessed portion of the barrel.

[0015] In addition, the provided pogo pin probe is characterized in that at least one through hole is formed penetrating at least one of the second body portion, the third body portion, and the fourth body portion, and no through hole is formed in the first body portion.

[0016] Furthermore, the provided pogo pin probe is characterized in that the through hole is filled with a different material from surrounding materials.

[0017] Furthermore, there is provided a pogo pin probe characterized in that the second body portion has a sawtooth shape.

[0018] Furthermore, the provided pogo pin probe is characterized in that the fourth body portion has a sawtooth shape.

[0019] In addition, the provided spring needle probe is characterized in that the maximum outer diameter of the third body portion is smaller than the outer diameter of the second body portion and the outer diameter of the fourth body portion.

[0020] In addition, the present invention provides a spring needle, including a cylinder, a probe partially inserted into the cylinder, a plunger partially inserted into the cylinder, and an elastic component arranged inside the cylinder and applying elastic force to the probe and the plunger in a direction in which the probe and the plunger move away from each other. The spring needle is characterized in that the probe is the above-mentioned spring needle probe.

[0021] Effects of the Invention

[0022] The spring needle probe of the present invention has a third main body in the shape of a sawtooth, so the concave part of the cylinder of the spring needle meshes with the saw teeth of the third main body, so that the spring needle probe does not rotate relative to the cylinder. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 FIG. 1 is a perspective view of a spring pin according to an embodiment of the present invention.

[0024] Figure 2 yes Figure 1 An exploded perspective view of a spring pin is shown.

[0025] Figure 3 yes Figure 1 A perspective view of a pogo pin probe is shown.

[0026] Figure 4 yes Figure 1 A partial cross-sectional view of a pogo pin probe is shown.

[0027] Figure 5 It is a perspective view of a spring needle probe according to another embodiment of the present invention.

[0028] Figure 6 yes Figure 5 A partial cross-sectional view of a pogo pin probe is shown.

[0029] Figure 7 It is a partial cross-sectional view of a probe for a spring pin according to another embodiment of the present invention. DETAILED DESCRIPTION

[0030] The embodiments of the present invention will be described in detail below with reference to the attached drawings. However, the embodiments of the present invention can be deformed into a variety of different forms, and the scope of the present invention should not be limited to the embodiments described in detail below for interpretation. The embodiments of the present invention are provided to more completely explain the present invention to those with general knowledge in the art. Therefore, the shapes of the elements in the figures are exaggerated for a clearer description, and the symbols marked with the same symbols in the figures represent the same elements.

[0031] Figure 1 is a three-dimensional diagram of a spring pin according to an embodiment of the present invention, Figure 2 yes Figure 1 An exploded perspective view of a spring pin is shown.

[0032] like Figure 1 and Figure 2 As shown, a spring pin 1 according to an embodiment of the present invention includes a spring pin probe 10 , a plunger 20 , a cylinder 30 , and an elastic member 40 .

[0033] The spring pin 1 electrically connects the terminal of the inspection object to the pad of the test equipment. The spring pin probe 10 on one side of the spring pin 1 is electrically connected to the terminal of the inspection object such as a semiconductor element or a display device, and the front end 21 of the plunger 20 exposed to the outside of the cylinder 30 is electrically connected to the pad of the test equipment on the other side of the spring pin 1 to inspect the electrical characteristics of the inspection object.

[0034] The plunger 20 is a conductor that is generally cylindrical in shape. A portion of the plunger 20 is inserted into the interior of the barrel 30. A step 23 is formed on the plunger 20 to prevent the plunger 20 from falling off the barrel 30. The end 25 of the plunger 20 on the spring needle probe 10 side is in a conical shape with a diameter that gradually decreases toward the end. This is to allow the end of the coil spring that serves as the elastic component 40 to be inserted. The plunger 20 can be made of tungsten, carbon steel, copper (Cu) alloy, palladium (Pd) alloy, gold (Au) alloy, etc. The exposed front end 21 of the plunger 20 can have a variety of shapes. Figure 1 and Figure 2 In the figure, the front end 11 of the plunger 20 is shown as being blunt, but it may also be in the shape of a cone or needle whose diameter gradually decreases toward the end, or it may be flat.

[0035] The barrel 30 is a generally cylindrical conductor. The barrel 30 is also called a tube or a shell. In order to allow the plunger 20 to move freely and linearly inside the barrel 30, the inner diameter of the barrel 30 is preferably slightly larger than the outer diameter of the plunger 20. The barrel 30 can be made of copper alloys such as nickel, nickel alloy, gold-plated nickel, phosphor bronze, brass, etc. In order to prevent short circuits with adjacent spring pins 1, the outer peripheral surface of the barrel 30 can be covered with a layer of insulating film.

[0036] The elastic member 40 is disposed inside the cylinder 30. The elastic member 40 may be a coil spring. The elastic member 40 is disposed between the spring pin probe 10 and the plunger 20. The elastic member 40 applies elastic force to the spring pin probe 10 and the plunger 20 in a direction in which the spring pin probe 10 and the plunger 20 move away from each other.

[0037] Figure 3 yes Figure 1 A perspective view of a pogo pin probe is shown. Figure 4 yes Figure 1 A partial cross-sectional view of a spring pin probe is shown. The cross-sectional portion is hatched.

[0038] like Figure 3 and Figure 4 As shown, the spring needle probe 10 includes a contact portion 11, a first body portion 13, a second body portion 15, a third body portion 17, and a fourth body portion 19 sequentially arranged along the length direction of the spring needle 1. The spring needle probe 10 can be manufactured by MEMS (micro-electromechanical system) process.

[0039] The contact portion 11 has a sharp end that contacts the test object such as the terminal of the semiconductor element. The spring needle probe 10 includes at least one contact portion 11. The area of ​​the contact portion 11 gradually increases from one end toward the other end. Figure 3 and Figure 4As shown, the contact portion 11 may be in the shape of a quadrangular pyramid. In addition, it may be in the shape of a polygonal pyramid other than a circular cone or a quadrangular pyramid.

[0040] The other end of the contact portion 11 is connected to one end of the first main body portion 13. The contact portion 11 is disposed at the center of the first main body portion 13. Figure 3 and Figure 4 As shown, the first main body 13 can be substantially cylindrical. In addition, it can also be a polygonal column. The diameter of the first main body 13 is larger than the inner diameter of the cylinder 30. Therefore, the first main body 13 will not be inserted into the interior of the cylinder 30, but exposed to the outside of the cylinder 30 together with the contact portion 11.

[0041] The other end of the first body 13 is connected to one end of the second body 15. The second body 15 may be in the shape of a cylinder or a polygonal column. The diameter of the second body 15 is less than or equal to the inner diameter of the cylinder 30. Therefore, the second body 15 is inserted into the cylinder 30. Preferably, a through hole 151 is formed in the center of the second body 15. This increases the bending strength per unit weight, thereby preventing the second body 15 from bending due to the pressure applied when the spring needle probe 10 contacts the object to be inspected.

[0042] The other end of the second body 15 is connected to one end of the third body 17. The third body 17 is in the shape of a sawtooth. The maximum outer diameter of the third body 17 is smaller than the inner diameter of the cylinder 30. The maximum outer diameter is a diameter based on the front end of the sawtooth 175. The maximum outer diameter of the third body 17 is smaller than the outer diameter of the second body 15. It is preferred that a through hole 171 is formed in the center of the third body 17.

[0043] The other end of the third body 17 is connected to one end of the fourth body 19. The fourth body 19 may be cylindrical or polygonal. The outer diameter of the fourth body 19 may be less than or equal to the inner diameter of the cylinder 30. The outer diameter of the fourth body 19 may be the same as the outer diameter of the second body 15. A through hole 191 is preferably formed in the center of the fourth body 19.

[0044] After the spring needle probe 10 is inserted into the cylinder 30, the spring needle probe 10 can be fixed to the cylinder 30 by applying pressure to the side of the cylinder 30 to form at least one recessed portion 31. The recessed portion 31 protrudes toward the third body portion 17. The recessed portion 31 and the serrations 175 of the third body portion 17 prevent the spring needle probe 10 from rotating. In addition, the recessed portion 31 is locked between the other end of the second body portion 15 and one end of the fourth body portion 19, thereby also inhibiting the spring needle probe 10 from moving up and down.

[0045] Figure 5 is a three-dimensional view of a spring needle probe according to another embodiment of the present invention, Figure 6yes Figure 5 A partial cross-sectional view of a spring pin probe is shown. The cross-sectional portion is hatched.

[0046] Figure 5 and Figure 6 The spring pin probe shown in the figure is different from the spring pin probe in that the second body 55 and the fourth body 59 also have a sawtooth shape. Figure 4 and Figure 5 The spring needle probe 10 shown in the figure is different. This embodiment is different from the spring needle probe 10 in that when the recessed portion 31 is formed across the second body portion 55 or the fourth body portion 59, the recessed portion 31 can be engaged with the saw teeth 555, 595 of the second body portion 55 or the fourth body portion 59. Figure 4 and Figure 5 The embodiment shown is more advantageous.

[0047] In addition, this embodiment is also similar to the embodiment in that it has a plurality of contact portions 51. Figure 4 and Figure 5 The pogo pin probe 10 shown is different. This embodiment includes four triangular pyramid-shaped contact portions 51 .

[0048] Figure 7 It is a partial cross-sectional view of a probe for a spring pin according to another embodiment of the present invention. Figure 7 The spring pin probe shown in the figure includes a plurality of through holes 651, 671, 691 in the second to fourth body parts 65, 67, 69, and these through holes 651, 671, 691 are filled with different materials 653, 673, 693 from the second to fourth body parts 65, 67, 69. Figure 3 and Figure 4 There are differences in the embodiments shown.

[0049] The second to fourth body parts 65, 67, 69 may be made of copper (Cu) or copper alloy. These body parts 65, 67, 69 have low hardness and may be bent or deformed by pressure.

[0050] As the dissimilar materials 653, 673, 693, a resin or metal having a higher hardness than the main body 65, 67, 69 can be used. As the metal, a metal including one or more elements selected from the group consisting of nickel (Ni), gold (Au), silver (Ag), carbon (C), palladium (Pd), rhodium (Rh), tin (Sn), ruthenium (Ru), and tungsten (W) can be used.

[0051] The pogo pin probe of this embodiment has the advantage of being able to prevent bending or deformation by filling the through holes 651 , 671 , 691 with a different material 653 , 673 , 693 having a relatively high hardness.

[0052] Although the preferred embodiments of the present invention have been illustrated and described above, the present invention is not limited to the above-mentioned specific embodiments. Without departing from the main spirit of the present invention as claimed in the claims, it is obvious that a person with ordinary knowledge in the field of the present invention can perform various modified implementations, and these modified implementations should not be understood separately from the technical ideas or prospects of the present invention.

[0053] Reference numerals

[0054] 1: spring needle, 10: probe for spring needle, 11, 51, 61: contact part, 13, 53, 63: first main body, 15, 55, 65: second main body, 17, 57, 67: third main body, 19, 59, 69: fourth main body, 20: plunger, 30: cylinder, 40: elastic member.

Claims

1. A probe for a spring needle, a part of which is inserted into a cylinder of a spring needle, wherein the probe for the spring needle is characterized in that: include: at least one contact portion having a sharp end for contacting the object to be inspected; A first main body portion, which is disposed outside the cylinder and is coupled to the other end of the contact portion at one end; A second main body portion, which is disposed inside the cylinder and is connected to the other end of the first main body portion at one end; A third main body portion, which is disposed inside the cylinder, is connected to the other end of the second main body portion at one end, and has a sawtooth shape; as well as The fourth main body is arranged inside the cylinder and is connected to the other end of the third main body at one end.

2. The spring needle probe according to claim 1, It is characterized in that The serrations of the third main body portion are engaged with the recessed portion of the barrel.

3. The spring needle probe according to claim 1, It is characterized in that At least one through hole is formed penetrating at least one of the second body portion, the third body portion, and the fourth body portion, The first body portion has no through hole formed therein.

4. The spring needle probe according to claim 3, It is characterized in that The through hole is filled with a foreign substance having a higher hardness than the surrounding substance.

5. The spring needle probe according to claim 4, It is characterized in that The foreign substance is a metal or a resin including one or more elements selected from the group consisting of nickel, gold, silver, carbon, palladium, rhodium, tin, ruthenium, and tungsten.

6. The spring needle probe according to claim 1, It is characterized in that The second body portion has a sawtooth shape.

7. The spring needle probe according to claim 1, It is characterized in that The fourth body portion has a sawtooth shape.

8. The spring needle probe according to claim 1, It is characterized in that The maximum outer diameter of the third body portion is smaller than the outer diameter of the second body portion and the outer diameter of the fourth body portion.

9. A spring pin, It is characterized in that A spring needle comprises a barrel, a probe partially inserted into the barrel, a plunger partially inserted into the barrel, and an elastic component disposed inside the barrel and applying elastic force to the probe and the plunger in a direction in which the probe and the plunger move away from each other. The spring needle is characterized in that: The probe is the spring pin probe according to any one of claims 1 to 8.

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