KR20150057487A - Pogo pin and manufacturing method thereof - Google Patents

Abstract

A technical idea of the present invention provides a pogo pin, which can reduce the number of parts needed and improve an electrical property, and a manufacturing method thereof. The pogo pin in a cylindrical shape comprises a bottom plunger having a bottom contact part having a downward contact part at the bottom, a spring part in a cylindrical shape coupled with the bottom contact part and extending toward an upper part, and a connection part integrally connected to the spring part and having a circular ring at the top; and a top plunger having an upper body part in a cylindrical shape having an upward contact part; a bottom body part in a cylindrical shape integrally coupled with the upper body part to be inserted into the bottom plunger, an upper projection formed in a place at which the upper body part and the bottom body part are coupled; and a top plunger equipped with a bottom projection formed at the top of the bottom body part. The circular ring is hooked up to the bottom body part between the upper projection and the bottom projection to fix the top plunger to the bottom plunger.

Description

Pogo pin and manufacturing method < RTI ID = 0.0 >

TECHNICAL FIELD OF THE INVENTION The present invention relates to a semiconductor device testing apparatus, and more particularly to a pogo pin for semiconductor device testing that tests the electrical performance of a semiconductor device.

Each chip on a wafer that has been fabricated at a wafer level is subjected to an electrical property test by a test facility in an electrical die sorting (EDS) process prior to performing the packaging process. In addition, packages having completed the packaging process are subjected to an electrical characteristic test by the test equipment. This is to judge whether or not each chip or package of the wafer is manufactured to a specific standard as a semiconductor device.

2. Description of the Related Art In recent years, with the progress of high integration of semiconductor devices, a contactor for testing semiconductor devices using a probe called a pogo pin or a spring pin has been widely used. The contactor electrically connects a semiconductor device to be tested with a test board or a DUT through the pogo pin.

The pogo pin is generally classified into a top plunger, a bottom plunger, a spring, and a pipe. The respective portions are separately formed in a separated form, and then joined to each other to constitute the pogo pin.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and it is an object of the present invention to provide a pogo pin and a method of manufacturing the same which can reduce the number of components and improve electrical characteristics.

Technical Solution In order to solve the above-described problems, the technical idea of the present invention is to solve the above-mentioned problems of the present invention by providing a lower contact portion having a cylindrical shape and a lower contact portion formed at a lower end thereof, a cylindrical spring portion integrally connected to the lower contact portion, A bottom plunger having a coupling portion integrally connected and formed with a circular ring at an upper end thereof; An upper body portion having a cylindrical shape and having an upper contact portion formed at an upper portion thereof, a lower body portion having a cylindrical shape integrally connected to the upper body portion and inserted into the lower plunger, a lower body portion formed at a connection portion between the upper body portion and the lower body portion And a top plunger having a protrusion and a lower protrusion formed on an upper portion of the lower body, wherein the circular ring is engaged with the lower body portion between the upper protrusion and the lower protrusion, A pogo pin having a structure fixed to a bottom plunger is provided.

In one embodiment of the present invention, the upper projection is a circular projection protruding in the form of a circular ring, and the lower projection includes at least one projection having a shape in which a part of a side surface of the lower body protrudes like a branch .

In an embodiment of the present invention, the lower projection may extend upward from a side surface of the lower body portion, and a gap may be formed between the lower body portion and the lower body portion toward the outer periphery of the lower body portion. If the gap is reduced and the force is not applied, it can be resilient so that it can return to the first interval.

In one embodiment of the present invention, each of the lower contact portion and the upper contact portion may have any one of a crown shape, a wedge shape, and a cone shape.

According to another aspect of the present invention, there is provided a method of manufacturing a flat-type bottom plunger, the method comprising: preparing a flat bottom plunger and a flat top plunger; Forming a cylindrical bottom plunger and a cylindrical top plunger, each of the flat bottom plunger and the flat top plunger being rolled; And inserting the lower body portion of the cylindrical top plunger into the cylindrical bottom plunger to couple and fix the cylindrical top plunger to the cylindrical bottom plunger.

In an exemplary embodiment of the present invention, the flat bottom plunger may include a lower contact portion formed in a lower end of a lower plate and having a flat plate shape, a spring connected integrally to the lower contact portion and extending in a zigzag And a coupling portion integrally connected to the spring portion and having a Tee shape, wherein the lower contact portion, the spring portion, and the coupling portion form one plane, and the flat top plunger has an upper And an upper protrusion formed at a connecting portion between the upper body and the lower body, and a lower body formed at the upper portion of the lower body, And the upper body part and the lower body part may be in one plane.

In one embodiment of the present invention, the upper protrusion is a protrusion protruding in a linear shape at a connecting portion between the upper body part and the lower body part, and the lower protrusion is formed in a shape in which a part of the lower body part protrudes like a branch And at least one protrusion having at least one protrusion.

In one embodiment of the present invention, in the step of forming the cylindrical bottom plunger and the cylindrical top plunger, the upper projection is a circular protrusion protruding in the form of a circular ring, and the lower projection is protruded from the side surface of the cylindrical lower body portion Wherein the upper portion of the T-shape is U-shaped, and the coupling portion is U-shaped in the coupling and fixing step, And may be formed into a circular ring so as to surround the lower trunk portion between the projection and the lower projection.

In one embodiment of the present invention, in the step of forming the cylindrical bottom plunger and the cylindrical top plunger, the upper projection is a circular projection protruding in the form of a circular ring, and the lower projection is protruded from the side of the cylindrical lower body portion And the upper part of the shape of the tee (T) is rounded by a circular ring, and the upper part of the shape of the tee (T) In the coupling and fixing step, the circular ring may pass through the lower projection and be located in the lower body between the upper projection and the lower projection.

The pogo pin according to the technical idea of the present invention may have a structure in which an integral type top plunger and an integrated bottom plunger are combined. As a result, the number of components can be reduced and the electrical characteristics can be remarkably improved. That is, the pogo pin of the present embodiment has a structure in which only two components of the integral type top plunger and bottom plunger are combined, respectively, so that the defective electrical characteristics due to the contact failure can be reduced accordingly.

In the method of manufacturing a pogo pin according to the technical idea of the present invention, a flat top plunger and a bottom plunger are prepared, and such a flat plate-like structure is rolled into a cylindrical structure to form a cylindrical top plunger and a bottom plunger, Therefore, the pogo pin can be manufactured very easily in the manufacturing process, and it is possible to contribute to cost reduction due to easiness in manufacturing process and fewer parts.

1A-1D are top and cross-sectional views of a pogo pin in accordance with an embodiment of the present invention.
FIGS. 2A and 2B are enlarged cross-sectional views of portions A and B of FIG. 1D, respectively.
FIG. 3A is a perspective view showing an intermediate step in which the bottom plunger and the top plunger of the pogo pin of FIG.
FIG. 3B is a horizontal sectional view showing an enlarged part C of FIG. 3A.
4A and 4B are a perspective view and a cross-sectional view showing an intermediate step in which a bottom plunger and a top plunger of a pogo pin according to another embodiment of the present invention are engaged.
4C is an enlarged cross-sectional view of part A of FIG. 4B.
5A and 5B are a perspective view and a cross-sectional view showing the bottom plunger and the top plunger of the pogo pin of Figs.
5C is a cross-sectional view showing an enlarged part A of FIG. 5B.
FIGS. 6A and 6B are perspective views showing a process of manufacturing the top plunger of the pogo pin of FIG. 1A.
FIGS. 7A and 7B are perspective views showing a process of manufacturing the top plunger of the pogo pin of FIG. 5A.
8A and 8B are perspective views showing a process of manufacturing the bottom plunger of the pogo pin of FIG. 1A or FIG. 5A.
9A to 9C are perspective views showing various structures of the upper contact portion of the top plunger and the lower contact portion of the bottom plunger in the pogo pin of FIG. 1A or 4A.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

The embodiments of the present invention are described in order to more fully explain the present invention to those skilled in the art, and the following embodiments may be modified into various other forms, The present invention is not limited to the embodiment. Rather, these embodiments are provided so that this disclosure will be more thorough and complete, and will fully convey the concept of the invention to those skilled in the art.

In the following description, when an element is described as being connected to another element, it may be directly connected to another element, but a third element may be interposed therebetween. Similarly, when an element is described as being on top of another element, it may be directly on top of the other element, and a third element may be interposed therebetween. In addition, the structure and size of each constituent element in the drawings are exaggerated for convenience and clarity of description, and a part which is not related to the explanation is omitted. Wherein like reference numerals refer to like elements throughout. It is to be understood that the terminology used is for the purpose of describing the present invention only and is not used to limit the scope of the present invention.

FIGS. 1A to 1D are plan views and cross-sectional views of a pogo pin according to an embodiment of the present invention, and FIGS. 2A and 2B are enlarged sectional views of portions A and B of FIG. 1D, respectively. Here, FIG. 1A is a front view, FIG. 1B is a side view, and FIG. 1C is a plan view seen from a rear surface, and FIG. 1D is a vertical sectional view of FIG.

Referring to FIGS. 1A and 2B, the pogo pin 100 according to the present embodiment may include a top plunger 110 and a bottom plunger 120. The top plunger 110 may include an upper body portion 112, an upper projection 114, a lower projection 116, and a lower body portion 118.

The upper body portion 112 may be formed in the shape of an elongated cylindrical pipe as shown and an upper contact portion 112c may be formed at the upper end. The upper contact portion 112c may have a crown shape, a wedge shape, or a cone shape. A more detailed structure of the upper contact portion 112c is described in FIGS. 9A to 9C. Meanwhile, the upper body 112 may have a first open hole H1. At least two or more first open holes h1 may be formed in the upper body 112 or not.

The upper protrusion 114 may have a circular protrusion structure protruding outward in the form of a circular ring at a portion where the upper body portion 112 and the lower body portion 118 are connected. The upper protrusion 114 may function to prevent the upper body 112 from being inserted into the bottom plunger 120. 6A, the upper protrusion 114 may be integrally coupled to the upper body 112 and the lower body 118. As shown in FIG.

In this embodiment, the upper protrusion 114 is not limited to the circular protrusion structure. For example, the upper projection 114 may have any projecting structure that can prevent the upper body 112 from being inserted into the bottom plunger 120. However, according to the technical idea of the present invention, the upper protrusion 114 of another protruding structure may also be formed integrally with the upper body part 112 and the lower body part 118.

The lower body part 118 may be formed in the form of an elongated cylindrical pipe like the upper body part 112. As shown in 6b, the lower portion 118b may be formed to be narrower than other portions. That is, the diameter of the lower end portion 118b may be smaller than the diameter of the other portion. The reason why the lower end portion 118b of the lower body portion 118 is narrowed is that the lower body portion 118 slides smoothly into the lower contact portion 126 of the bottom plunger 120 Lt; / RTI >

However, in the present embodiment, the lower end portion 118b of the lower body portion 118 is not limited to a narrow shape. For example, the lower end portion 118b of the lower body portion 118 may be formed in the same size as the other portions.

The lower protrusion 116 may be formed at an upper portion of the lower body portion 118 and slightly spaced from the upper protrusion 114. The lower protrusion 116 may have a shape such that a part of the lower body part 118 protrudes outwardly like a tree branch. That is, the lower portion of the lower projection 116 is integrally coupled to the lower body portion 118, and may have a shape that is separated from the lower body portion 118 while being upward.

Two lower protrusions 116 may be formed to face each other as shown. However, in the pogo pin 100 of the present embodiment, the number of the lower projections 116 is not limited to two. For example, only one lower protrusion 116 may be formed, or three or more lower protrusions 116 may be formed.

On the other hand, although not shown, the lower projection 116 is not limited to the branch shape extending from the lower body portion 118. For example, the lower protrusion 116 may be formed in a circular protrusion structure like the upper protrusion 114.

The bottom plunger 120 may include an engagement portion 122, a spring portion 124, and a lower contact portion 126.

The coupling portion 122 may include a circular ring 122r at an upper portion and a coupling body 122b at a lower portion. The circular ring 122r may surround the lower body portion 118 between the upper projection 114 and the lower projection 116. [ The top plunger 110 can be engaged with and fixed to the bottom plunger 120 by engaging the circular ring 122r with the lower body portion 118. [ The engaging body 122b may extend downward from a part of the circular ring 122r to cover a part of the lower body part 118. [ That is, the engaging body 122b may have a structure that covers only one side of the lower body portion 118 and opens the other side. FIG. 1A shows a portion where the engaging body 122b covers the lower body portion 118, and FIG. 1C shows a portion where the lower body portion 118 is opened from the engaging body 122b.

The spring portion 124 may have a cylindrical structure integrally connected to the coupling body 122b of the coupling portion 122 and extending downward. The spring portion 124 may have a structure different from that of a spring having a general coil structure. Specifically, the spring of a general coil structure is constantly rotated in either one of the clockwise direction and the counterclockwise direction along one direction. However, in the present embodiment, the spring portion 124 can be continuously changed in the clockwise direction and the counterclockwise direction alternately along the one direction. For example, as shown in FIG. 1C, the turning direction of the turning portions T is reversed. This result can be attributed to the formation of the cylindrical spring portion 124 by rounding the flat spring in the zigzag shape as shown in FIG. 8A.

The lower contact portion 126 has a cylindrical shape and can be integrally connected to the spring portion 124. A lower contact portion 126c may be formed at the lower end of the lower contact portion 126. The lower contact portion 126c may have a crown shape, a wedge shape, a cone shape, or the like as the upper contact portion 112c. A more detailed structure of the lower contact portion 126c is described in FIGS. 9A to 9C. On the other hand, two second open holes H2 may be formed in the lower contact portion 126. One or three or more second open holes H2 may be formed in the lower contact portion 126 and may not be formed in some cases.

The lower portion of the lower body portion 118 of the top plunger 110 can be slidably inserted into the lower contact portion 126. The spring portion 124 of the bottom plunger 120 is contracted and the lower plunger 110 of the top plunger 110 is rotated by the force of the downward urging force of the lower plunger 110. Therefore, The lower portion of the lower contact portion 118 may slip into the lower contact portion 126. Further, when the applied force is removed, the spring portion 124 is restored to its original state, so that the lower portion of the lower body portion 118 comes out of the lower contact portion 126.

The lower end portion 118b of the lower body portion 118 may have a narrower shape than the other portion for smooth movement of the lower body portion 118 in the lower contact portion 126 as described above. In order to prevent the lower end portion 118b of the lower body portion 118 from being caught at the entrance side of the lower contact portion 126, the lower end portion 118b of the lower body portion 118 in the relaxed state of the spring portion 124, Can be kept inserted into the lower contact portion 126.

The pogo pin 100 of this embodiment may have a structure in which an integral type top plunger 110 and an integrated bottom plunger 120 are combined. As a result, the number of components can be reduced and the electrical characteristics can be remarkably improved. That is, in the case of the conventional pogo pin, the above-described four parts are connected to each other, and the electrical characteristics of the entire pogo pin may be deteriorated due to the contact failure in each of the connecting parts. However, the pogo pin 100 of the present embodiment has a structure in which only two components of the integral type top plunger 110 and the bottom plunger 120 are combined, so that the defective electrical characteristic due to contact failure can be reduced accordingly.

The physical and electrical coupling between the top plunger 110 and the bottom plunger 120 in the structure of the pogo pin 100 of the present embodiment is achieved by the physical and electrical coupling between the upper protrusion 114 and the lower protrusion 116 And the circular ring 122r of the engaging portion 122 surrounding the portion. Of course, contact at other parts can also contribute to electrical coupling.

In addition, the pogo pin 100 of the present embodiment can be manufactured by preparing a flat top plunger and a bottom plunger, rounding the flat plate-like structure into a cylindrical structure to form a cylindrical top plunger and a bottom plunger, Therefore, it is possible to manufacture the pogo pin very easily in the manufacturing process, and it is possible to contribute to the cost reduction owing to the easiness in the manufacturing process and the small number of parts. The manufacturing process of the pogo pin 100 will be described in more detail in FIGS. 6A to 8B.

FIG. 3A is a perspective view showing an intermediate step in which the bottom plunger and the top plunger of the pogo pin of FIG. 1A are engaged, and FIG. 3B is a horizontal sectional view enlarging and illustrating a portion C of FIG.

3A and 3B, when the top plunger 110 and the bottom plunger 120 are coupled to each other, the upper portion 122r 'of the coupling portion 122 of the bottom plunger 120 is not circular, (U) letter shape. That is, as can be seen in FIG. 3B, the horizontal section of the upper portion 122r 'of the engaging portion 122 may have a U-shape.

When the top plunger 110 and the bottom plunger 120 are coupled to each other, the upper portion 122r 'of the U-shaped engaging portion 122 is inserted between the upper protrusion 114 and the lower protrusion 116 The upper portion 122r 'of the engaging portion 122 and the upper portion 122r' of the engaging portion 122 to form the circular ring 122r so as to enclose the lower body portion 118, The plunger 110 and the bottom plunger 120 can be physically and electrically coupled.

FIGS. 4A and 4B are a perspective view and a cross-sectional view showing an intermediate step in which the bottom plunger and the top plunger of the pogo pin according to another embodiment of the present invention are engaged, and FIG. 4C is an enlarged cross- 5A and 5B are a perspective view and a cross-sectional view after the bottom plunger and the top plunger of the pogo pin of FIGS. 4A and 4B are combined, and FIG. 5C is an enlarged cross-sectional view of a portion A of FIG. For convenience of description, the contents already described in Figs. 1A to 2B will be briefly described or omitted.

4A to 5C, the pogo pin 100a of the present embodiment may be similar to the pogo pin 100 of FIG. 1A except for the portion of the lower projection 116a. That is, in the pogo pin 100a of the present embodiment, the lower protrusion 116a is formed to have an elongated shape upward. Specifically, the lower projection 116a may have a shape such that a part of the side surface of the lower body part 118 protrudes upward like a tree branch, similar to the lower projection 116 of the pogo pin 100 of FIG. 1A have. However, in the present embodiment, the lower protrusion 116a may have a structure in which the length extending from the lower body portion 118 is longer and the distance between the lower protrusion 116a and the lower protrusion 116a gradually increases toward the upper side.

The lower protrusion 116a of this embodiment may have elasticity. Accordingly, when the force is applied in the direction of the center axis of the lower body portion 118 as shown by the arrow F1 in Fig. 4C, the gap is reduced, and when the force is removed, You can go back to the original state. The lower projection 116a is elongated so as to have elasticity so that the coupling between the top plunger 110a and the bottom plunger 120 in the pogo pin 100a of the present embodiment is the same as that of the pogo pin The bottom plunger 110 and the bottom plunger 120 may be different from each other.

For example, when the top plunger 110a and the bottom plunger 120 are coupled to each other, the pogo pin 100a of the present embodiment may have a circular ring 122r already formed in the coupling portion 122 of the bottom plunger 120 have. The circular ring 122r of the engaging portion 122 passes through the lower protrusion 116a from below and is located at the portion of the lower torso 118 between the upper protrusion 114 and the lower protrusion 116a, The physical and electrical coupling between the plunger 110a and the bottom plunger 120 can be achieved. The circular ring 122r is positioned in the lower body portion 118 between the upper projection 114 and the lower projection 116a and then a force is applied in the horizontal direction so that the circular ring 122r is pressed against the lower body portion 118a, So that it can be more closely attached to the base plate 118.

As shown in Fig. 4C, a force is applied to the lower projection 116a in the same direction as the arrow F1 while the circular ring 122r is raised to the upper side, so that the lower projection 116a is engaged with the lower body 118, And the circular ring 122r passes through the lower projection 116a. When the circular ring 122r completely passes the portion of the lower projection 116a, as shown in Fig. 5C, the lower projection 116a is urged in the same direction as the arrow F2 by elasticity, I will return.

The lower protrusions 116a having elasticity may be formed so as to face each other as shown in the figure. However, in the pogo pin 100a of the present embodiment, the number of the lower projections 116a is not limited to two. For example, only one lower protrusion 116a may be formed, or three or more lower protrusions 116a may be formed.

In the structure of the pogo pin 100a of the present embodiment, the lower protrusion 116a is relatively long, so that the length of the lower body portion 118 of the top plunger 110a is longer than that of the pogo pin 100 of FIG. Can be longer than that. Assuming that the overall length of the pogo pin is constant to some extent, the length of the upper body part 112 in the structure of the pogo pin 100a of this embodiment can be made shorter as the lower body part 118 is longer. The upper protrusion 114 formed at the connecting portion of the upper body 112 and the lower body 118 may be disposed above the pogo pin 100 of FIG. In addition, in the structure of the pogo pin 100a of this embodiment, as the lower body portion 118 becomes longer, the entire length of the lower body portion 118 receiving the lower body portion 118 can be longer. Specifically, the spring portion 124 of the bottom plunger 120 may be longer than the spring portion 124 of the pogo pin 100 of FIG. 1A.

FIGS. 6A and 6B are perspective views showing a process of manufacturing the top plunger of the pogo pin of FIG. 1A.

Referring to FIG. 6A, a flat top plunger 110p is first fabricated. The flat top plunger 110p can be manufactured by press working using a press mold including the corresponding shape.

The flat top plunger 110p may include a flat plate-shaped upper body portion 112p, an upper projection 114p, a lower projection 116p, and a plate-like lower body portion 118p.

The flat plate-like upper body 112p has a flat plate-like structure and a planar upper contact portion 112cp may be formed at an upper end thereof. Meanwhile, a first groove H1 'corresponding to the first open hole may be formed on a side surface of the flat plate-shaped upper body 112p. At least two of the first grooves H1 'may be formed or may not be formed.

The upper projection 114p is provided at a position where the plate-like upper body portion 112p and the plate-like lower body portion 118p are connected to each other in a direction crossing the plate-like upper body portion 112p or the plate-like lower body portion 118p As shown in FIG. The upper protrusion 114p may be formed in a folded shape in the form of a wrinkle at a connecting portion between the flat upper body 112p and the lower flat body 118p as shown in FIG. Accordingly, the upper projection 114p may have a structure protruding from the upper surface of the plate-like upper body 112p or the plate-like lower body 118p.

The plate-like lower body part 118p has a flat plate-like structure like the flat plate-like upper body part 112p, and the bent part 118bp may be formed at the lower end. The bent portion 118bp is formed to narrow the lower end portion 118b of the lower body portion 118 when the flattened lower body portion 118p is rolled into a cylindrical shape. If the lower end portion 118b is not made to have a narrowed structure, it is not necessary to form the bent portion 118bp separately.

The lower projection 116p may have a shape to protrude from the upper surface of the plate-like lower body portion 118p like a tree branch shape. Although two lower protrusions 116p are formed, one or more lower protrusions 116p may be formed.

In the structure of the flat top plunger 110p of the present embodiment, the flat upper body 112p and the flat lower body 118p may constitute one plane. Of course, the upper protrusion 114p, the lower protrusion 116p, and the bent portion 118bp may have a structure protruding or curved in the plane.

Referring to FIG. 6B, after manufacturing the flat top plunger 110p, the flat top plunger 110p is rolled in the direction of the arrow to form a cylindrical top plunger 110. FIG. This cylindrical top plunger 110 may correspond to the top plunger 110 of the pogo pin 100 of FIG. 1A.

FIGS. 7A and 7B are perspective views showing a process of manufacturing the top plunger of the pogo pin of FIG. 5A. For convenience of description, the contents already described in Figs. 6A and 6B will be briefly described or omitted.

Referring to FIG. 7A, first, a flat top plunger 110ap is manufactured. The flat plate type top plunger 110ap can be manufactured by press working using a press mold including the same type as the flat plate type top plunger 110p of FIG. 6A.

The flat top plunger 110ap of this embodiment can be formed longer than the flat top plunger 110p of Fig. 6a. That is, the lower projection 116ap has a shape protruding from the upper surface of the plate-like lower body part 118p like a tree branch shape, and may have a structure having elasticity by being formed longer. The distance between the lower projection 116ap and the plate-like lower body portion 118p becomes larger as the distance from the portion coupled with the plate-like lower body portion 118p increases.

Although two lower protrusions 116ap are formed in this embodiment, one or three or more lower protrusions 116ap may be formed as described with respect to the lower protrusion 116p in FIG. 6a.

7B, after the flat top plunger 110ap is manufactured, the flat top plunger 110ap is rounded in the direction of the arrow to form a cylindrical top plunger 110a. This cylindrical top plunger 110a may correspond to the top plunger 110a of the pogo pin 100a of Fig. 5a.

8A and 8B are perspective views showing a process of manufacturing the bottom plunger of the pogo pin of FIG. 1A or FIG. 5A.

Referring to FIG. 8A, first, a flat bottom plunger 120p is manufactured. The flat bottom plunger 120p can also be manufactured by press working using a press mold including the corresponding mold.

The flat plate bottom plunger 120p may include a T-shaped engagement portion 122p, a spring portion 124p, and a flat bottom contact portion 126p.

The T (T) shaped coupling portion 122p has a T shape as a whole and is formed in a shape of "?" Formed by extending downward from an upper portion 122rp and an upper portion 122rp of an upper & And may include an engagement body 122bp.

The spring portion 124p may be formed to extend downward in a zigzag form from the coupling body 122bp as shown in FIG. On the other hand, the zigzag turning portion T may correspond to a portion where the rotational direction changes after the cylindrical spring portion 124 is turned.

The plate-like lower contact portion 126p is integrally connected to the spring portion 124 and can have a generally planar structure. A planar lower contact portion 126cp may be formed at the lower end of the plate-like lower contact portion 126p. A second groove H2 'and a second hole H2' corresponding to the second open hole may be formed in the flat bottom contact portion 126p. The second groove H2 'and the second groove H2' The hole H2 "may be formed of only one of two or three or more. In some cases, neither the second groove H2 'nor the second hole H2' may be formed.

The T-shaped engagement portion 122p, the spring portion 124p, and the plate-like lower contact portion 126p can constitute one plane.

Referring to FIG. 8B, after manufacturing the flat bottom plunger 120p, the flat bottom plunger 120p is rounded in the direction of the arrow to form a cylindrical bottom plunger 120. FIG. This cylindrical bottom plunger 120 may correspond to the bottom plunger 120 of the pogo pins 100, 100a of FIG. 1A or 5A.

Thereafter, the top plunger 110 of FIG. 6B is coupled to the bottom plunger 120 to complete the pogo pin 100 of FIG. 1A. In addition, the top plunger 110a of FIG. 7B may be coupled to the bottom plunger 120 to complete the pogo pin 100a of FIG. 5A.

8B corresponds to the bottom plunger 120 of the pogo pin 100 of FIG. 1A, the bottom plunger 120 of FIG. 8B passes through the pogo pin 100 of FIG. 1A The bottom plunger 120 of FIG. That is, as shown in Fig. 3A, the upper portion 122rp of the shape of the T-shaped coupling portion 122p becomes the upper portion 122r 'of the U shape once, A circular ring 122r surrounding a portion of the lower body 118 between the upper projection 114 and the lower projection 116 can be a bottom plunger 120 of the pogo pin 100 of FIG.

When the bottom plunger 120 of FIG. 8B corresponds to the bottom plunger 120 of the pogo pin 100 of FIG. 5A, in the process of making the cylindrical bottom plunger 120 of this step, the T- The upper part 122rp of the shape "-" of the part 122p may be directly the circular ring 122r.

9A to 9C are perspective views showing various structures of the upper contact portion of the top plunger and the lower contact portion of the bottom plunger in the pogo pin of FIG. 1A or 4A.

9A to 9C, in the pogo pin 100, 100a of FIG. 1A or FIG. 5A, the upper contact portion 112c formed at the upper end of the top plunger 110, 110a has a three- However, the upper contact portion 112c is not limited to a crown shape having three acids. For example, it may have a crown shape having four acids as shown in FIG. 9A or a crown shape having a number of more acids.

Further, the upper contact portion 112c is not limited to the crown shape, but may have a wedge shape as shown in Fig. 9B, or a cone shape as shown in Fig. 9C.

The lower contact portion 126c formed at the lower end of the bottom plunger 120 in the pogo pin 100 or 100a of FIG. 1A or 5A may also have a crown shape with various numbers of mountains, a wedge shape as shown in FIG. 9B, Or a cone shape as shown in FIG. 9C.

Furthermore, the shape of the upper contact portion 112c and the lower contact portion 126c is not limited to the crown shape, the wedge shape, or the cone shape. For example, the shapes of the upper contact portion 112c and the lower contact portion 126c may be formed in various structures depending on the structure of the terminal to be contacted during semiconductor device testing.

While the present invention has been described with reference to exemplary embodiments thereof, it will be understood by those of ordinary skill in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims. will be. Accordingly, the true scope of the present invention should be determined by the technical idea of the appended claims.

The present invention relates to a pogo pin and a method of manufacturing the same and a method of manufacturing the same and a method of manufacturing the same. 122b: coupling body, 124: spring portion, 126: lower contact portion, 126c: lower contact portion,

Claims (9)

A cylindrical spring portion integrally connected to the lower contact portion and extending in an upper direction, and a coupling portion integrally connected to the spring portion and having a circular ring at an upper end thereof, the lower contact portion having a cylindrical shape and a lower contact portion formed at a lower end thereof, A bottom plunger; And
An upper body portion having a cylindrical shape and having an upper contact portion formed at an upper end thereof, a lower body portion having a cylindrical shape integrally connected to the upper body portion and inserted into the lower plunger, an upper projection formed at a connection portion between the upper body portion and the lower body portion, And a top plunger having a lower projection formed on an upper portion of the lower body,
And the circular ring is engaged with the lower body portion between the upper projection and the lower projection to fix the upper plunger to the lower plunger. The method according to claim 1,
The upper protrusion is a circular protrusion protruding in the form of a circular ring,
Wherein the lower protrusion is at least one protrusion having a shape such that a part of a side surface of the lower body protrudes like a branch. 3. The method of claim 2,
Wherein the lower protrusion extends upward from a side surface of the lower body and has an increased gap toward the upper side toward the upper side,
Wherein the lower protrusions are resilient so that when the force is applied in the direction of the center axis of the lower body portion, the gap is reduced, and when the force is not exerted, the lower protrusion can return to the first gap. The method according to claim 1,
Wherein the lower contact portion and the upper contact portion each have one of a crown shape, a wedge shape, and a cone shape. Preparing a flat bottom plunger and a flat top plunger;
Forming a cylindrical bottom plunger and a cylindrical top plunger, each of the flat bottom plunger and the flat top plunger being rolled; And
And inserting a lower body portion of the cylindrical top plunger into the cylindrical bottom plunger to couple and fix the cylindrical top plunger to the cylindrical bottom plunger. 6. The method of claim 5,
The flat bottom plunger includes a bottom contact portion formed in a lower end of a bottom plate, a spring portion integrally connected to the bottom contact portion and extending in a zigzag in an upper direction, And a coupling portion having a T shape, wherein the lower contact portion, the spring portion and the coupling portion form one plane,
The flat plate type top plunger includes an upper body portion in the form of a flat plate, an upper body portion in the form of a flat plate integrally connected to the upper body portion, an upper projection formed at a connecting portion between the upper body portion and the lower body portion, And a lower protrusion formed on an upper portion of the lower body, wherein the upper body and the lower body form one plane. The method according to claim 6,
The upper protrusion is a protrusion protruding in a linear shape at a connecting portion between the upper body and the lower body,
Wherein the lower protrusion is at least one protrusion having a shape such that a part of the lower body protrudes like a branch. 8. The method of claim 7,
In the step of making the cylindrical bottom plunger and the cylindrical top plunger,
The upper protrusion is a circular protrusion protruding in the form of a circular ring and the lower protrusion is a protrusion protruding from a side surface of the cylindrical lower body part,
The coupling portion has a U-shaped top portion in the shape of a "T" shape,
In the bonding and fixing step,
Wherein the U-shape is formed into a circular ring so as to surround the lower body part between the upper projection and the lower projection. 8. The method of claim 7,
In the step of making the cylindrical bottom plunger and the cylindrical top plunger,
The upper protrusion is a circular protrusion protruding in the form of a circular ring, and the lower protrusion protrudes from the side surface of the cylindrical lower body to be spaced upward. When the force is applied, the gap is reduced. When the force is not applied, Returning to the first interval,
Wherein the upper portion of the "-" shape of the T (T) shape becomes a circular ring,
In the coupling and fixing step,
Wherein the circular ring passes through the lower projection and is located in the lower body between the upper projection and the lower projection.

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