Method for manufacturing a contact tip and conductive pin including the contact tip

Abstract

The present invention provides a method for manufacturing a contact tip that can form contact tips and tip portions in various shapes, and provides conductive pins including contact tips and tip portions in various shapes.

Description

[Technical Field]

[0001] The present invention relates to a method for manufacturing a contact tip and a conductive pin including a contact tip, and more particularly to a method for manufacturing a contact tip by cutting and a conductive pin including a contact tip manufactured by cutting. [Background technology]

[0002] The conductive pin means a pin that can be used in a test device such as a probe card or test socket that comes into contact with an object to be tested to test the object.

[0003] Semiconductor devices are tested by contacting a test socket or probe card having a plurality of conductive pins with an object to be tested, such as a semiconductor package or semiconductor wafer, to provide an electrical signal.

[0004] Here, the conductive pin serves to transmit an electrical signal between the test object and the test device, and the contact tip is located at the end of the conductive pin and directly contacts the test device to transmit the electrical signal.

[0005] In this regard, prior art document No. 10-2023-0119383 discloses a "pogo pin and its manufacturing method," which involves forming a groove in a shape corresponding to a contact tip on one surface of a sacrificial substrate, and then filling it with a metal layer by plating to form the contact tip.

[0006] Thus, the contact tip manufactured by the MEMS process has a specific shape. When etching the substrate with an etching solution, the groove has a specific slope, depth, and shape depending on the crystal orientation of the substrate.

[0007] That is, the grooves having limited structures can only form contact tips having limited structures (for example, quadrangular pyramid and truncated quadrangular pyramid structures), which causes a problem that they cannot be adapted to various environments. [Prior art documents] [Patent documents]

[0008] [Patent Document 1] Korean Patent Publication No. 10-2023-0119383 Summary of the Invention [Problem to be solved by the invention]

[0009] In order to solve the above problems, an object of the present invention is to provide a method for manufacturing a contact tip that allows the contact tip and the tip portion to be formed in a variety of shapes.

[0010] It is another object of the present invention to provide conductive pins that include contact tips and distal ends of various shapes. [Means for solving the problem]

[0011] In order to achieve the above object, a manufacturing method of a contact tip according to an embodiment of the present invention is a manufacturing method of a contact tip used in a conductive pin for testing the electrical characteristics of a test object, and can include the following steps: a preparation step of preparing a contact member to be processed; a tip forming step of cutting one longitudinal surface of the contact member to form a tip; a flat portion forming step of cutting the one surface to form a flat surface to which the tip is connected; and a contact tip forming step of processing a lateral surface of the contact member to form the appearance of the contact tip.

[0012] In the tip forming step according to the embodiment of the present invention, a mirror finish can be applied to the surface that constitutes the tip.

[0013] In the tip forming step according to an embodiment of the present invention, the tip may be formed in a pyramidal or conical shape.

[0014] In addition, in the tip portion forming step according to an embodiment of the present invention, the tip portion may be formed in a plurality of pieces, each of which has a pyramidal shape, and each of which may be formed such that at least one apex thereof contacts an edge of the flat portion.

[0015] In addition, in the tip portion forming step according to an embodiment of the present invention, the tip portion may be formed of a plurality of tip portions spaced apart from each other.

[0016] In the contact tip forming step in the embodiment of the present invention, a lateral surface of the flat portion may be processed so that an edge of the flat surface comes into contact with the contact tip.

[0017] In the embodiment of the present invention, the contact tip forming step may include processing a lateral surface of the flat portion to remove a part of the contact tip on the flat surface.

[0018] Also, the method for manufacturing a contact tip according to an embodiment of the present invention may further include forming a plating layer on the contact tip.

[0019] Meanwhile, a conductive pin according to an embodiment of the present invention may include a contact tip manufactured by the contact tip manufacturing method, a barrel portion having one side connected to the contact tip, an elastic portion located in the hollow of the barrel portion and one side supported by the contact tip, and a movable tip that moves in a longitudinal direction in response to compression and expansion of the elastic portion.

[0020] In addition, in the embodiment of the present invention, the contact tip may include a single tip portion in the shape of a triangular pyramid.

[0021] In addition, in an embodiment of the present invention, the contact tip may include a plurality of quadrangular pyramid-shaped tip portions and a flat surface on which the plurality of tip portions are formed, and an edge of the flat surface may contact the plurality of tip portions.

[0022] In the embodiment of the present invention, the contact tip may include a tip portion in a quadrangular pyramid shape with one vertex region removed, and a flat surface on which the tip portion is formed. [Effects of the Invention]

[0023] According to the present invention, contact tips are manufactured by processing, and contact tips of various shapes can be provided by adjusting the height of the tip portion, the inclination of the tip portion, the spacing between the tip portions, and the like.

[0024] The present invention can form contact tips of various shapes by processing, thereby providing a variety of conductive pins. [Brief explanation of the drawings]

[0025] [Figure 1] 1A and 1B illustrate cross sections of conductive pins including contact tips according to embodiments of the present invention. [Figure 2] FIG. 10 shows a flowchart of a method for manufacturing a contact tip according to an embodiment of the present invention. [Figure 3a] FIG. 10 is a diagram showing a contact tip including one quadrangular pyramidal tip in an embodiment of the present invention. [Figure 3b] FIG. 10 is a diagram showing a contact tip including one triangular pyramidal tip in an embodiment of the present invention. [Figure 3c] FIG. 10 shows a contact tip including one conical tip in an embodiment of the present invention. [Figure 4a] 10A and 10B are diagrams illustrating a plurality of tips formed in a non-contact state with the edge of a flat surface in an embodiment of the present invention. [Figure 4b] 10A-10C illustrate a plurality of tips formed in contact with the edge of a flat surface in an embodiment of the invention. [Figure 4c] 10A and 10B are diagrams illustrating a plurality of tips formed with partial regions of the tips removed in an embodiment of the present invention. [Figure 5] FIG. 10 shows a plated contact tip in an embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0026] Those skilled in the art will be able to develop various devices that embody the principles of the invention and fall within the concept and scope of the invention, although not explicitly described or illustrated herein. Furthermore, all conditional terms and embodiments listed herein are expressly intended only to enable the concept of the invention to be understood in principle, and should not be understood as being limited to the embodiments and conditions specifically listed in this specification.

[0027] The above objects, features and advantages will become more apparent from the following detailed description of the invention taken in conjunction with the accompanying drawings, which will enable those skilled in the art to which the invention pertains to easily implement the technical idea of ​​the invention.

[0028] The embodiments described herein are described with reference to cross-sectional views and / or perspective views that are ideal exemplary views of the present invention. The size of the components shown in such figures may be exaggerated to effectively explain the technical content. The shapes of the exemplary figures may vary due to manufacturing techniques and / or tolerances.

[0029] In describing various embodiments, components that perform the same function will be given the same names and the same reference numerals for convenience, even across different embodiments. Furthermore, the expression "at least one of A, B, and C" means that it is composed of one, two, or three of A, B, and C. Furthermore, unless otherwise specified, a cross section or cross-sectional area may refer to a cross section perpendicular to the length direction. Furthermore, the length direction may refer to the direction of extension and compression of the elastic portion 400. Furthermore, configurations and operations already described in other embodiments will be omitted for convenience.

[0030] First, the structure of the conductive pin 10 including the contact tip 100 according to the embodiment of the present invention will be described.

[0031] FIG. 1 is a cross-sectional view of a conductive pin 10 including a contact tip 100 according to an embodiment of the present invention.

[0032] Referring to FIG. 1, a conductive pin 10 according to an embodiment of the present invention may include a contact tip 100, a barrel portion 200 having one side connected to the contact tip 100, an elastic portion 400 located in the hollow 201 of the barrel portion 200 and one side supported by the contact tip 100, and a movable tip 300 that moves in the longitudinal direction in response to compression and expansion of the elastic portion 400.

[0033] The contact tip 100 can contact an object under test (not shown) to transmit and receive electrical signals to and from the object under test. A portion of the contact tip 100 may be located in a hollow 201 of the barrel portion 200 and fixed to the barrel portion 200.

[0034] The contact tip 100 may include a tip portion 110, a flat portion 120 having a flat surface 125 that contacts the bottom surface of the tip portion 110, and a body portion 130 that extends longitudinally from the flat portion 120 and is positioned in the hollow 201.

[0035] The contact tip 100 can be manufactured by a contact tip manufacturing method described below.

[0036] At least one tip portion 110 may be provided. The tip portion 110 may be provided so as to protrude from a flat surface 125 that forms one surface of the flat portion 120. The tip portion 110 may be provided so that the cross-sectional area thereof narrows along the length direction. However, the shape of the tip portion 110 is not limited to the above.

[0037] The tip 110 may be provided in one shape of a rectangular pillar, a cylinder, a pyramid, a cone, a truncated pyramid, and a truncated cone. Each of the plurality of tips 110 may be provided in one shape of a rectangular pillar, a cylinder, a pyramid, a cone, a truncated pyramid, and a truncated cone. However, the shape of the tip 110 is not limited to those described above. The plurality of tips 110 may be provided on the flat surface 125 independently and spaced apart from each other.

[0038] The contact tip 100 may include a single tip 110 having a triangular pyramid shape, a polygonal pyramid shape, or a cone shape. The contact tip 100 may include multiple tips 110 having a square pyramid shape, a polygonal pyramid shape, or a cone shape.

[0039] The contact tip 100 may include a flat portion 120 with a flat surface 125 on which one or more tips 110 are formed. The edges of the flat surface 125 may contact the tips 110.

[0040] The contact tip 100 may include a tip portion 110 having a square or polygonal pyramid shape with one vertex region removed (see FIG. 4c). The removed surface of the tip portion 110 having one vertex region removed may be formed to extend from the flat portion 120 with the same curvature as the lateral surface of the flat portion 120.

[0041] The main body portion 130 may have a cross-sectional area smaller than the cross-sectional area of ​​the flat portion 120. The main body portion 130 may have the same central axis as the flat portion 120. The main body portion 130 may include a first main body portion 131, a second main body portion 132, a third main body portion 133, and a fourth main body portion 134.

[0042] The first body portion 131 may extend longitudinally from the flat portion 120. The first body portion 131 may have a cross-sectional area that is smaller than the cross-sectional area of ​​the flat portion 120.

[0043] The second body portion 132 may extend longitudinally from the first body portion 131. The second body portion 132 may have a cross-sectional area that is smaller than the cross-sectional area of ​​the first body portion 131.

[0044] The third body portion 133 can extend longitudinally from the second body portion 132. The third body portion 133 can have a cross-sectional area that is larger than the cross-sectional area of ​​the second body portion 132. The third body portion 133 can have a cross-sectional area that is equal to the cross-sectional area of ​​the first body portion 131.

[0045] The fourth body portion 134 may extend in the longitudinal direction from the third body portion 133. The cross-sectional area of ​​the fourth body portion 134 may gradually decrease along the longitudinal direction. The fourth body portion 134 may support the elastic portion 400 in the longitudinal direction.

[0046] The difference in cross-sectional area between first body portion 131 and second body portion 132 can form a first step 135. The difference in cross-sectional area between second body portion 132 and third body portion 133 can form a second step 136. The first separation prevention portion 210 of barrel portion 200 is located between first step 135 and second step 136, and can prevent separation between barrel portion 200 and contact tip 100.

[0047] The moving tip 300 can contact a test device (not shown) or an electric circuit (not shown) to transmit and receive electric signals to and from the test device or the electric circuit.

[0048] The transfer tip 300 can include a transfer tip portion 310 and a transfer body portion 320 .

[0049] The moving tip portion 310 may be provided to extend from the moving main body portion 320. The moving tip portion 310 may be provided so that the width of the cross-sectional area narrows along the length direction. However, the shape of the moving tip portion 310 is not limited to the above.

[0050] The moving body portion 320 may include a first moving body portion 321 , a second moving body portion 322 , a third moving body portion 323 , and a fourth moving body portion 324 .

[0051] The first moving body portion 321 can extend in the length direction from the moving tip portion 310. A portion of the first moving body portion 321 can move in the length direction along the hollow 201, and the remainder can move in the length direction outside the hollow 201, depending on the compression and expansion of the elastic portion 400.

[0052] The second moving body portion 322 may extend in the length direction from the first moving body portion 321. The second moving body portion 322 may have a cross-sectional area that gradually increases along the length direction.

[0053] The second moving body portion 322 can be positioned in the hollow 201 and can move longitudinally along the hollow 201 in response to the compression and expansion of the elastic portion 400. The outer surface of the second moving body portion 322 contacts the inner surface of the second separation prevention portion 220 of the barrel portion 200, and can prevent the moving tip 300 from being separated from the barrel portion 200.

[0054] The third moving body portion 323 may extend longitudinally from the second moving body portion 322. The third moving body portion 323 may be larger in cross-sectional area than the first moving body portion 321.

[0055] The fourth moving body portion 324 may extend in the longitudinal direction from the third moving body portion 323. The cross-sectional area of ​​the fourth moving body portion 324 may gradually decrease along the longitudinal direction. The fourth moving body portion 324 may support the elastic portion 400 in the longitudinal direction.

[0056] The barrel portion 200 may have a hollow 201, and may accommodate the elastic portion 400 through the hollow 201. The barrel portion 200 may accommodate a portion of the contact tip 100 in the hollow 201 to fix the contact tip 100. The barrel portion 200 may accommodate a portion of the moving tip 300 in the hollow 201 to provide a space for the moving tip 300 to move in the longitudinal direction.

[0057] The barrel portion 200 may include a first separation prevention portion 210 and a second separation prevention portion 220. The first separation prevention portion 210 may be recessed from a side surface of the barrel portion 200 in the central axis direction between both ends of the barrel portion 200. The second separation prevention portion 220 may be bent from one end of the barrel portion 200 in the central axis direction.

[0058] The first separation prevention part 210 can prevent the contact tip 100 from separating from the barrel part 200 by narrowing the cross-sectional area of ​​the hollow 201. The second separation prevention part 220 can prevent the movable tip 300 from separating from the barrel part 200 by narrowing the cross-sectional area of ​​the hollow 201.

[0059] The barrel portion 200 may include a fixing portion 230. The fixing portion 230 may be formed between both ends of the barrel portion 200 and protrude radially from the outer surface of the barrel portion 200. The fixing portion 230 may be formed along the circumferential direction of the barrel portion 200 and may have a larger outer diameter than other regions of the barrel portion 200. The fixing portion 230 may fix the conductive pin 10 or the barrel portion 200 within a testing device.

[0060] The elastic part 400 may be located in the hollow 201 of the barrel part 200. The elastic part 400 may include a spring. The elastic part 400 may be compressed when the contact tip 100 comes into contact with the test object and receives pressure. The elastic part 400 may be expanded (restored) again when the contact between the contact tip 100 and the test object is released.

[0061] One end of the elastic portion 400 may be supported in the longitudinal direction by the contact tip 100 and / or the fourth body portion 134. The other end of the elastic portion 400 may be supported in the longitudinal direction by the moving tip 300 and / or the fourth moving body portion 324.

[0062] The conductive pin 10 according to the embodiment of the present invention may include a contact tip 100, a moving tip 300, a barrel portion 200, and an elastic portion 400. The contact tip 100 and the barrel portion 200 may be combined as independent components to form the conductive pin 10.

[0063] The conductive pin 10 can be configured by integrally manufacturing the contact tip 100 and the barrel portion 200 as a single structure. In this case, the contact tip 100 may include only the tip portion 110, the flat surface 125, and the flat portion 120, and may be formed to extend integrally from one end of the barrel portion 200.

[0064] In the conductive pin 10 according to an embodiment of the present invention, when the contact tip 100 comes into contact with the object to be tested and receives longitudinal pressure, the elastic part 400 can be compressed, and the movable tip 300 can be moved longitudinally in accordance with the compression of the elastic part 400.

[0065] In the conductive pin 10 according to an embodiment of the present invention, when the contact between the contact tip 100 and the test object is released, the elastic part 400 can be extended, and the movable tip 300 can move in the longitudinal direction in response to the extension of the elastic part 400.

[0066] Next, a method for manufacturing a contact tip according to an embodiment of the present invention will be described.

[0067] FIG. 2 is a flowchart showing a method for manufacturing a contact tip according to an embodiment of the present invention.

[0068] Referring to FIG. 2, a method for manufacturing a contact tip according to an embodiment of the present invention may include a preparation step S100 of preparing a contact member to be processed, a tip portion forming step S200 of cutting one longitudinal surface of the contact member to form tip portion 110, a flat portion forming step S300 of cutting one longitudinal surface of the contact member to form flat surface 125 to which tip portion 110 is connected, and a contact tip forming step S400 of processing a lateral surface of the contact member to form the appearance of contact tip 100.

[0069] First, a preparation step S100 can be performed to prepare a contact member to be processed.

[0070] The contact member may refer to the state before the contact tip 100 is processed. When the contact tip 100 and the barrel portion 200 are integrally formed, the contact member may refer to the state before the contact tip 100 and the barrel portion 200 are processed.

[0071] The contact member may be configured in the shape of, but is not limited to, a cylinder or a rectangular column. The contact member may be machined using a cutting means such as a lathe, milling machine, machining center, drilling machine, grinding machine, etc. The contact member may include a hollow formed by drilling in at least a portion of its length.

[0072] Next, a tip forming step S200 can be performed in which one longitudinal surface of the contact member is cut to form the tip 110, and a flat portion forming step S300 can be performed in which one longitudinal surface of the contact member is cut to form the flat surface 125 to which the tip 110 is connected.

[0073] When the contact member is columnar, the contact member may have at least one lateral surface and two bottom surfaces, where one of the bottom surfaces may be represented by a longitudinal surface as described below.

[0074] One surface of the contact member in the length direction may be cut to form the tip portion 110. The cutting means may cut the contact member while moving relative to the contact member to form the tip portion 110.

[0075] The tip 110 may be formed in at least one shape of a triangular pyramid, a square pyramid, a cone, a truncated triangular pyramid, a truncated square pyramid, a truncated cone, a triangular prism, a square prism, and a cylinder, but the shape of the tip 110 is not limited to those mentioned above.

[0076] Since the tip portion 110 is formed by cutting, the tip portion 110 can have various shapes without limitations in terms of the number, shape of the bottom surface, length of the corners of the bottom surface, radius of the bottom surface, shape of the side surface, length of the corners of the side surface, etc. Mirror finishing can be performed on the surfaces that make up the tip portion 110.

[0077] The flat portion 120 can be formed by cutting one surface of the contact member in the length direction. The cutting means can cut the contact member to form the flat portion 120 while moving relative to the contact member.

[0078] The flat portion 120 has a flat surface 125 on one side and can support the tip portion 110. That is, the contact tip 100 can have a flat shape on one side except for the tip portion 110. The flat portion 120 may be formed to extend from the main body portion 130 in the length direction.

[0079] The flat portion 120 can contact the end of the barrel portion 200 on the other side, and in the contact state, the first separation prevention portion 210 is located between the first step 135 and the second step 136, and the contact tip 100 can be coupled to the barrel portion 200.

[0080] The tip portion forming step S200 and the flat portion forming step S300 can be performed simultaneously. The cutting means can cut a partial area of ​​the contact member to form the tip portion 110, and can cut another partial area of ​​the contact member to form the flat portion 120.

[0081] As a comparative example, in the manufacturing method of a MEMS-type contact tip, the shape of the groove portion etched into the substrate is limited, so the contact tip 100 formed by plating into the groove portion also has to have a limited shape.

[0082] In the method for manufacturing a contact tip according to the embodiment of the present invention, the contact tip 100 is manufactured by cutting, and therefore the shape of the tip portion 110 can be realized more freely.

[0083] Subsequently, a contact tip forming step S400 can be performed in which the lateral surface of the contact member is processed to form the exterior of the contact tip 100.

[0084] The lateral surface of the contact member can be cut to form the appearance of the contact tip 100. The cutting means can process the contact member as it moves around the contact member, or the contact member can be rotated while the cutting means processes the contact member.

[0085] The contact member may have its lateral surface cut to be machined into flat portion 120 and main body portion 130. Specifically, the contact member may have its lateral surface cut to be machined into flat portion 120, first main body portion 131, second main body portion 132, third main body portion 133, and fourth main body portion 134.

[0086] The flat portion 120 may have an outer cross-sectional diameter that is the same as the outer diameter of the barrel portion 200. The body portion 130 may have an outer cross-sectional diameter that is smaller than or equal to the inner diameter of the barrel portion 200. The first body portion 131 may have an outer cross-sectional diameter that is smaller than the flat portion 120. The second body portion 132 may have an outer cross-sectional diameter that is smaller than the first body portion 131. The third body portion 133 may have an outer cross-sectional diameter that is larger than the second body portion 132. The fourth body portion 134 may have an outer cross-sectional diameter that decreases along the length from the third body portion 133.

[0087] The first main body portion 131 and the third main body portion 133 may have the same outer diameter in cross section, and may be the same as or smaller than the inner diameter of the barrel portion 200. The inner diameter of the first separation prevention portion 210 may be smaller than the outer diameters of the first main body portion 131 and the third main body portion 133, and may be larger than the outer diameter of the second main body portion 132.

[0088] As described above, the cutting means can cut the lateral surface of the contact member to process the flat portion 120 and the main body portion 130.

[0089] The lateral surface of the contact member can be machined to adjust the radius of the flat surface. Depending on the extent to which the lateral surface of the contact member is machined, the outer diameter of the flat portion 120 and the radius of the flat surface 125 can be reduced. The greater the extent to which the lateral surface of the contact member is machined, the closer the edge of the flat surface 125 can be to the tip 110.

[0090] When the lateral surface of the contact member is cut in the direction of the central axis up to the starting position of the tip 110, the tip 110 can contact the edge of the flat surface 125. In this case, when the contact tip 100 is viewed from the lengthwise direction, the tip 110 appears to be in a shape where the complete shape is in contact with the edge of the flat surface 125 of the flat portion 120.

[0091] When the lateral surface of the contact member is cut in the central axis direction to an interior position of the tip portion 110, a portion of the tip portion 110 may be removed and come into contact with the edge of the flat surface 125. In this case, when the contact tip 100 is viewed in the length direction, the tip portion 110 may appear to be in contact with the edge of the flat surface 125 of the flat portion 120, with a portion of the tip portion 110 having been removed. In other words, the tip portion 110 may not protrude radially from the flat surface 125 of the flat portion 120, and the shape of the contact tip 100 may be circular when viewed in the length direction.

[0092] The contact tip forming step S400 may include a flat portion side surface forming step of processing the side surface of the contact member to form the side surface of the flat portion 120, and a body portion side surface forming step of processing the side surface of the contact member to form the side surface of the body portion 130.

[0093] In the flat portion side surface forming step, the side surface of the flat portion 120 of the contact member can be cut to reduce the area of ​​the flat surface 125, and in this process the edge of the flat portion 120 can contact the already formed tip portion 110.

[0094] In the flat portion side surface forming step, the side surface of the flat portion 120 of the contact member can be further cut to further narrow the area of ​​the flat surface 125, and in this process, part of the flat portion 120 can be removed along with some area of ​​the already formed tip portion 110.

[0095] In the main body side surface forming step, the side surfaces of the main body 130 of the contact member can be cut so that each region of the main body 130 (first main body 131 to fourth main body 134) has the above-mentioned cross-sectional area or outer diameter.

[0096] Next, the shape of the contact tip 100 manufactured by the manufacturing method for a contact tip according to the embodiment of the present invention will be described.

[0097] The same description as that of the contact tip 100 described above will be omitted, and only differences will be described.

[0098] FIG. 3a is a diagram showing a contact tip 100 including a single quadrangular pyramidal tip 110 according to an embodiment of the present invention. FIG. 3b is a diagram showing a contact tip 100 including a single triangular pyramidal tip 110 according to an embodiment of the present invention. FIG. 3c is a diagram showing a contact tip 100 including a single conical tip 110 according to an embodiment of the present invention. FIG. 4a is a diagram showing a plurality of tips 110 formed in a state of not contacting the edge of the flat surface 125 according to an embodiment of the present invention. FIG. 4b is a diagram showing a plurality of tips 110 formed in a state of contacting the edge of the flat surface 125 according to an embodiment of the present invention. FIG. 4c is a diagram showing a plurality of tips 110 formed in a state where a portion of the tip 110 has been removed according to an embodiment of the present invention.

[0099] The first line L1 refers to the edge of the flat portion 120 or the edge of the flat surface 125, and the second line L2 refers to a virtual edge that has the same shape as the first line L1 and connects the outermost points of at least one or more tips 110 (if a portion of the tip 110 has been removed, the complete shape before removal is used as the reference).

[0100] 3a, a single tip portion 110 may be formed on a flat portion 120. In this case, the tip portion 110 may have a square pyramid shape. A contact tip 100 according to an embodiment of the present invention may include the tip portion 110, the flat portion 120, and a body portion 130.

[0101] In the tip forming step S200 and the flat portion forming step S300, the contact member can be cut to form a single tip portion 110 in the shape of a quadrangular pyramid, and can be machined to form a flat portion 120 including a flat surface 125 that supports the single tip portion 110.

[0102] In the contact tip forming step S400, the lateral surface of the contact member may be processed to determine the cross-sectional area or outer diameter of the flat portion 120. Furthermore, the lateral surface of the contact member may be processed to determine the cross-sectional area or outer diameter of the main body portion 130.

[0103] As shown in Figure 3a, the first line L1 can be positioned outside the second line L2. Alternatively, the first line L1 can be co-located with the second line L2 (see Figure 4b), or the first line L1 can be positioned inside the second line L2 (see Figure 4c).

[0104] The flat portion 120 may include a first portion 121 and a second portion 122. The first portion 121 may be a region extending in the length direction from the main body portion 130. The second portion 122 may be a region extending in the length direction from the first portion 121. The second portion 122 may be formed to have a smaller cross-sectional area or outer diameter than the first portion 121. The second portion 122 may include a flat surface 125 that supports the tip portion 110.

[0105] In the contact tip forming step S400, the lateral surface of the contact member may be processed to form the second portion 122. The flat portion 120 is not necessarily formed as a divided portion into the first portion 121 and the second portion 122 having different cross-sectional areas or outer diameters. Alternatively, the flat portion 120 may be formed as a single portion having the same cross-sectional area or outer diameter.

[0106] 3b, a single tip 110 can be formed on the flat portion 120. In this case, the tip 110 may have a triangular pyramid shape.

[0107] In the tip forming step S200 and the flat portion forming step S300, the contact member can be cut to form a single tip portion 110 in the shape of a triangular pyramid, and can be machined to form a flat portion 120 including a flat surface 125 that supports the single tip portion 110.

[0108] In the contact tip forming step S400, the lateral surface of the contact member can be processed to determine the cross-sectional area or outer diameter of the flat portion 120. Furthermore, the lateral surface of the contact member can be processed to determine the cross-sectional area or outer diameter of the main body portion 130.

[0109] As shown in Figure 3b, the first line L1 can be positioned outside the second line L2. Alternatively, the first line L1 can be co-located with the second line L2 (see Figure 4b), or the first line L1 can be positioned inside the second line L2 (see Figure 4c).

[0110] As described above, the flat portion 120 includes the first portion 121 and the second portion 122 having different cross-sectional areas or outer diameters. Furthermore, as described above, the flat portion 120 may be formed in a single shape having the same cross-sectional area or outer diameter.

[0111] 3c, a single tip 110 can be formed on the flat portion 120. In this case, the tip 110 may be cone-shaped.

[0112] In tip forming step S200 and flat portion forming step S300, the contact member can be machined into a single conical tip 110 and a flat portion 120 including a flat surface 125 that supports the single tip 110.

[0113] In the contact tip forming step, the lateral surface of the contact member can be processed to determine the cross-sectional area or outer diameter of the flat portion 120. Furthermore, the lateral surface of the contact member can be processed to determine the cross-sectional area or outer diameter of the main body portion 130.

[0114] As shown in Figure 3c, the first line L1 can be positioned outside the second line L2. Alternatively, the first line L1 can be co-located with the second line L2 (see Figure 4b), or the first line L1 can be positioned inside the second line L2 (see Figure 4c).

[0115] As described above, the flat portion 120 includes the first portion 121 and the second portion 122 having different cross-sectional areas or outer diameters. Furthermore, as described above, the flat portion 120 may be formed in a single shape having the same cross-sectional area or outer diameter.

[0116] 4a, a plurality of tip portions 110 may be formed on a flat portion 120. In this case, the tip portions 110 may have a quadrangular pyramid shape. However, the shape of the tip portions 110 is not limited to the above shape.

[0117] A contact tip 100 according to an embodiment of the present invention may include a plurality of tip portions 110, a flat portion 120, and a body portion 130, and the plurality of tip portions 110 may be spaced apart from the edge of the flat surface 125 in a central axial direction.

[0118] In the tip forming step S200 and the flat portion forming step S300, the contact member can be cut to form a plurality of quadrangular pyramidal tip portions 110, and can be formed into a flat portion 120 including a flat surface 125 that supports the plurality of tip portions 110.

[0119] In the contact tip forming step S400, the lateral surface of the contact member can be processed to determine the cross-sectional area or outer diameter of the flat portion 120. Furthermore, the lateral surface of the contact member can be processed to determine the cross-sectional area or outer diameter of the main body portion 130.

[0120] The edge of the flat surface 125 of the flat portion 120 can be spaced apart from the plurality of tips 110. That is, an empty space can be formed between the edge of the flat surface 125 and the closest point of the plurality of tips 110.

[0121] As shown in Figure 4a, the first line L1 can be positioned outside the second line L2. Alternatively, the first line L1 can be co-located with the second line L2 (see Figure 4b) or positioned inside the second line L2 (see Figure 4c).

[0122] As described above, the flat portion 120 includes the first portion 121 and the second portion 122 having different cross-sectional areas or outer diameters. Furthermore, as described above, the flat portion 120 may be formed in a single shape having the same cross-sectional area or outer diameter.

[0123] 4b, a plurality of tip portions 110 may be formed on the flat portion 120. In this case, the tip portions 110 may have a quadrangular pyramid shape. However, the shape of the tip portions 110 is not limited to the above shape.

[0124] A contact tip 100 according to an embodiment of the present invention may include a plurality of tips 110 , a flat portion 120 and a body portion 130 , and the plurality of tips 110 may contact the edge of the flat surface 125 .

[0125] In the contact tip forming step S400, the lateral surface of the contact member can be processed to determine the cross-sectional area or outer diameter of the flat portion 120. Furthermore, the lateral surface of the contact member can be processed to determine the cross-sectional area or outer diameter of the main body portion 130.

[0126] The edge of the flat surface 125 of the flat portion 120 can come into contact with the plurality of tips 110. That is, the edge of the flat surface 125 and the closest points among the plurality of tips 110 can come into contact with each other.

[0127] As shown in Figure 4b, the first line L1 may be located at the same position as the second line L2. Alternatively, the first line L1 may be located outside the second line L2 (see Figure 4a), or the first line L1 may be located inside the second line L2 (see Figure 4c).

[0128] As described above, the flat portion 120 includes the first portion 121 and the second portion 122 having different cross-sectional areas or outer diameters. Furthermore, as described above, the flat portion 120 may be formed in a single shape having the same cross-sectional area or outer diameter.

[0129] 4c, a plurality of tip portions 110 may be formed on the flat portion 120. In this case, the tip portions 110 may have a shape in which a portion of the tip portion 110 is removed from its original quadrangular pyramid shape. However, the original shape before the portion of the tip portion is removed is not limited to a quadrangular pyramid. The original shape may be at least one of a quadrangular pyramid, a triangular pyramid, and a cone, but is not limited to these shapes.

[0130] The contact tip 100 according to the embodiment of the present invention may include a plurality of tip portions 110, a flat portion 120, and a main body portion 130. Each of the plurality of tip portions 110 may have a shape in which a portion of the tip portion 110 is removed. The portion of the tip portion 110 may include one vertex.

[0131] In the tip forming step S200 and the flat portion forming step S300, the contact member can be cut to form a plurality of pyramidal shaped spires, and can be machined into a flat portion 120 including a flat surface 125 that supports a plurality of tip portions 110.

[0132] In the contact tip forming step S400, the lateral surface of the contact member can be processed to determine the cross-sectional area or outer diameter of the flat portion 120. The lateral surface of the contact member can be processed up to the region of the tip portion 110, and a portion of the region of the tip portion 110 can be removed. Specifically, the portion of the region of the tip portion 110 may be a region that includes one of the vertices that make up the bottom surface of the tip portion 110.

[0133] Additionally, the lateral surface of the contact member may be machined to determine the cross-sectional area or outer diameter of the body portion 130 .

[0134] As shown in Figure 4c, the first line L1 can be positioned inside the second line L2. Alternatively, the first line L1 can be positioned outside the second line L2 (see Figure 4a), or the first line L1 can be at the same position as the second line L2 (see Figure 4b).

[0135] The flat portion 120 may be configured as a single portion having the same cross-sectional area or outer diameter, or may be configured as a portion divided into a first portion 121 and a second portion 122 having different cross-sectional areas or outer diameters, as described above.

[0136] FIG. 5 is a diagram illustrating a plated contact tip 100 in accordance with an embodiment of the present invention.

[0137] Referring to FIG. 5, the method for manufacturing a contact tip according to an embodiment of the present invention may further include a plating layer forming step S500 of forming a plating layer 500 on the contact tip 100.

[0138] Through the tip portion forming step S200, the flat portion forming step S300 and the contact tip forming step S400, a contact tip 100 including a tip portion 110, a flat portion 120 and a main body portion 130 is formed, and a plating layer 500 can be formed on the formed contact tip 100 to improve the conductivity of the contact tip 100.

[0139] The plating layer 500 may include Au. The contact member may include, but is not limited to, at least one of NiB, NiP, and BeCu.

[0140] The method for manufacturing a contact tip according to an embodiment of the present invention involves cutting a contact member before processing to form the contact tip 100 and the tip portion 110, so that contact tips 100 and tip portions 110 of various shapes can be formed without restrictions.

[0141] In the manufacturing method of the contact tip according to the embodiment of the present invention, the relative positions of the first line L1 and the second line L2 can be freely set by cutting the lateral surface of the contact member.

[0142] The method for manufacturing a contact tip according to an embodiment of the present invention can provide contact tips 100 having various shapes by varying the number of tip portions 110, the corner lengths constituting the tip portions 110, the angles of the lateral faces, etc.

[0143] The method for manufacturing a contact tip according to an embodiment of the present invention can provide the contact tip 100 more quickly by omitting the PR coating step, exposure step, and plating step that are repeated in the MEMS process.

[0144] The conductive pin 10 including the contact tip 100 according to the embodiment of the present invention is manufactured by cutting the contact tip 100, so that the conductive pin 10 can be provided in various shapes in response to the demands of the consumer.

[0145] As mentioned above, the present invention has been described with reference to preferred embodiments, but those skilled in the art can implement the present invention with various modifications and variations without departing from the spirit and scope of the present invention as set forth in the following claims. [Explanation of symbols]

[0146] 10 conductive pin, 100 contact tip, 110 tip portion, 120 flat portion, 121 first portion, 122 second portion, 125 flat surface, 130 main body portion, 131 first main body portion, 132 second main body portion, 133 third main body portion, 134 fourth main body portion, 135 first step, 136 second step, 200 barrel portion, 201 hollow, 210 first separation prevention portion, 220 second separation prevention portion, 230 fixed portion, 300 moving tip, 310 moving tip portion, 320 moving main body portion, 400 elastic portion, 500 plating layer.

Claims

1. A method for manufacturing a contact tip used in a conductive pin for testing electrical characteristics of a test object, comprising: a preparation step of preparing a contact member to be processed; a tip portion forming step of cutting one surface of the contact member in the longitudinal direction to form a tip portion; a flat portion forming step of cutting the one surface to form a flat surface to which the tip portion is connected; and a contact tip forming step of processing a lateral surface of the contact member to form the outer appearance of the contact tip.

2. The method for manufacturing a contact tip according to claim 1 , wherein the tip forming step includes mirror finishing a surface that constitutes the tip.

3. The method for manufacturing a contact tip according to claim 1 , wherein in said tip forming step, said tip is formed into a pyramidal or conical shape.

4. In the tip portion forming step, The tip portion is formed in a plurality of pieces, and each tip portion has a pyramidal shape, The method for manufacturing a contact tip according to claim 1 , wherein each of said tip portions is formed so that at least one apex thereof contacts an edge of said flat portion.

5. The method for manufacturing a contact tip according to claim 1 , wherein in said tip portion forming step, said tip portion is formed from a plurality of tip portions spaced apart from each other.

6. The method for manufacturing a contact tip according to claim 1 , wherein the contact tip forming step processes a lateral surface of the flat portion so that an edge of the flat surface contacts the contact tip.

7. The method for manufacturing a contact tip according to claim 1 , wherein the contact tip forming step processes a lateral surface of a flat portion to remove a part of the contact tip on the flat surface.

8. The method for manufacturing a contact tip according to claim 1 , further comprising a plating layer forming step of forming a plating layer on the contact tip.

9. A contact tip manufactured by the method of claim 1; a barrel portion, one side of which is connected to the contact tip; an elastic portion located in the hollow of the barrel portion and having one side supported by the contact tip; a moving tip that moves longitudinally in response to compression and expansion of the resilient portion.

10. The conductive pin according to claim 9 , wherein the contact tip includes a single tip portion in the shape of a triangular pyramid.

11. the contact tip includes a plurality of quadrangular pyramidal tip portions and a flat surface on which the plurality of tip portions are formed, The conductive pin of claim 9 , wherein an edge of said flat surface contacts said plurality of tips.

12. The conductive pin according to claim 9 , wherein the contact tip includes a tip portion having a quadrangular pyramid shape with one vertex region removed, and a flat surface on which the tip portion is formed.

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