Anti-sticking spring probe

Abstract

The utility model relates to the technical field of spring probes, in particular to an anti-fouling spring probe, which comprises a cavity, an upper probe head mounted at the upper end of the cavity and a lower probe head mounted at the lower end of the cavity, the lower end of the upper probe head is fixed in an inner hole at the upper end of the cavity, and the lower probe head is movably arranged in an inner hole at the lower end of the cavity. The top end of the upper needle head is provided with a plurality of inclined planes, the inclined planes enable the top end of the upper needle head to be in a pyramid shape, the upper needle head is provided with a needle point part, and the needle point part, the cavity and the circle center of the upper needle head are located on the same vertical line. The four inclined planes are processed at the top end of the upper probe head, so that the top end of the upper probe head is in the shape of a rectangular pyramid, the probe point part is absolutely sharp and easily punctures an oxide layer and a pollution layer, and each inclined plane is subjected to mirror surface treatment, so that the surface of the probe point is smooth and is not easy to attach pollutants; meanwhile, due to the pyramid-shaped design, the probe head on the probe can be cleaned conveniently, and cleanliness during use is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of spring probes, in particular to a spring probe that resists contamination. Background Art

[0002] Spring probes are mainly used in semiconductor chip design verification, wafer testing, and finished product testing. They are core components that connect chips / wafers with test equipment for signal transmission, and play an important role in the quality control of semiconductor products.

[0003] Currently, the tip of a traditional spring probe is generally turned into a conical tip, which is then used to contact the chip pad for testing. During the test, oxide contaminants on the chip pad easily adhere to the tip, causing increased resistance and thus affecting the test results. Therefore, traditional spring probes have the following disadvantages:

[0004] 1. Although the conical needle tip processed by turning appears pointed to the naked eye, when observed under a microscope, the limitations of the turning process result in a convex point at the tail of the conical needle tip, and the needle tip cannot be formed into an absolutely sharp point.

[0005] 2. The surface of the conical needle tip made by turning is not easy to be smoothed, and the surface is rough, which easily causes contaminants to adhere. Utility Model Content

[0006] The utility model provides a spring probe with anti-fouling properties, so as to solve the problems raised in the above background technology.

[0007] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0008] A spring probe with anti-fouling properties comprises a cavity, an upper needle head mounted on the upper end of the cavity, and a lower needle head mounted on the lower end of the cavity, wherein the lower end of the upper needle head is fixed in an inner hole at the upper end of the cavity, and the lower needle head is movably arranged in the inner hole at the lower end of the cavity, and the top end of the upper needle head is provided with multiple inclined surfaces, and the multiple inclined surfaces make the top end of the upper needle head pyramidal and have a needle tip portion, and the needle tip portion is on the same vertical line as the center of the cavity and the upper needle head.

[0009] Preferably, the angle values ​​of each pyramid-shaped inclined surface at the top end of the upper needle head, with the needle tip as the intersection point, are equal.

[0010] Preferably, four inclined surfaces are provided, and the top end of the upper needle head is in the shape of a quadrangular pyramid.

[0011] Preferably, the plurality of inclined surfaces are highly smooth mirror surfaces.

[0012] Preferably, the plug of the lower needle consists of a first cylindrical section, a connecting section and a second cylindrical end, the first cylindrical section is connected to the second cylindrical end through the connecting section, and the outer diameter of the first cylindrical section is greater than the outer diameter of the second cylindrical end.

[0013] Preferably, the first cylindrical section, the connecting section and the second cylindrical end are integrally formed.

[0014] Preferably, the end of the second cylindrical end away from the connecting section is a hemisphere.

[0015] Preferably, the upper side wall of the cavity is provided with four rivet holes, and the four rivet holes are evenly distributed along the circumferential direction of the cavity.

[0016] Preferably, a buffer spring is provided in the inner cavity of the cavity, and two ends of the buffer spring respectively contact the lower end surface of the upper needle head and the upper end surface of the lower needle head.

[0017] By adopting the above technical solution, the beneficial effects achieved by the utility model are as follows:

[0018] In the utility model, four inclined surfaces are processed on the top of the upper needle head so that the top of the upper needle head is in the shape of a quadrangular pyramid, which makes the needle tip absolutely sharp and easy to pierce the oxide layer and the pollution layer. In addition, each inclined surface is mirror-finished to make the surface of the probe tip smooth and not easy to adhere to pollutants. At the same time, the pyramid-shaped design facilitates the cleaning of the needle head on the probe to ensure cleanliness during use. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0020] Figure 2 It is a schematic diagram of the overall structure of the utility model;

[0021] Figure 3 It is a schematic diagram of the overall structure of the utility model;

[0022] Figure 4 for Figure 1 Schematic diagram of the structure after the explosion.

[0023] In the figure: 1, cavity; 2, upper needle; 21, inclined surface; 22, needle tip; 3, lower needle; 31, first cylindrical section; 32, connecting section; 33, second cylindrical end; 4, rivet hole; 5, buffer spring. DETAILED DESCRIPTION

[0024] In order to more clearly understand the above-mentioned purpose, features and advantages of the present invention, the present invention is further described below with reference to the accompanying drawings and embodiments. It should be noted that the embodiments of the present application and the features therein can be combined with each other without conflict.

[0025] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways than those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed in the following specification. Example

[0026] like Figure 1-2 As shown, the utility model provides an anti-fouling spring probe, comprising a cavity 1, an upper needle 2 installed at the upper end of the cavity 1, and a lower needle 3 installed at the lower end of the cavity 1. The lower end of the upper needle 2 is fixed in the inner hole at the upper end of the cavity 1, and the lower needle 3 is movably arranged in the inner hole at the lower end of the cavity 1, and the top of the upper needle 2 is provided with multiple inclined surfaces 21. The multiple inclined surfaces 21 make the top of the upper needle 2 pyramidal and have a needle tip 22, and the needle tip 22 is on the same vertical line as the center of the cavity 1 and the upper needle 2.

[0027] In this embodiment, the angles of the pyramid-shaped inclined surfaces 21 at the top of the upper needle head 2 are all equal, with the needle tip 22 being the intersection point.

[0028] Furthermore, if the top of the upper needle head 2 is in the shape of a quadrangular pyramid, the angle value of each inclined surface 21 is 60°, so that every two facing inclined surfaces 21 are symmetrically arranged.

[0029] In this embodiment, four inclined surfaces 21 are provided, and the top end of the upper needle head 2 is in the shape of a quadrangular pyramid.

[0030] Furthermore, the use of a quadrangular pyramid structure makes the probe tip absolutely sharp and can easily pierce the oxide layer and the contamination layer.

[0031] Furthermore, the inclined surfaces 21 are not limited to four, but can also be three or five, etc., so that the top of the upper needle head 2 is a triangular pyramid or a pentagonal pyramid, which can also ensure that the needle tip is absolutely sharp, and solve the problem of a bump at the tail of the conical needle tip due to limitations of the turning process.

[0032] In this embodiment, the plurality of inclined surfaces 21 are highly smooth mirror surfaces.

[0033] Furthermore, the plurality of inclined surfaces 21 are mirror-finished to ensure a smooth surface that is less likely to attract pollutants.

[0034] In this embodiment, the plug of the lower needle 3 is composed of a first cylindrical section 31, a connecting section 32 and a second cylindrical end 33. The first cylindrical section 31 is connected to the second cylindrical end 33 through the connecting section 32, and the outer diameter of the first cylindrical section 31 is larger than the outer diameter of the second cylindrical end 33.

[0035] Furthermore, the first cylindrical section 31 , the connecting section 32 and the second cylindrical end 33 are integrally formed.

[0036] Furthermore, the end of the second cylindrical end 33 away from the connecting section 32 is a hemisphere.

[0037] In this embodiment, four rivet holes 4 are formed on the upper side wall of the cavity 1 , and the four rivet holes 4 are evenly distributed along the circumference of the cavity 1 .

[0038] Furthermore, the inner end of the upper needle 2 is installed in the inner hole of the upper end of the cavity 1 through the cooperation of the rivet hole 4 and the rivet, thereby simplifying the connection and greatly saving the assembly time.

[0039] In this embodiment, a buffer spring 5 is provided in the inner cavity of the cavity 1 , and two ends of the buffer spring 5 respectively contact the lower end surface of the upper needle 2 and the upper end surface of the lower needle 3 .

[0040] The working principle of the present invention is as follows: by processing four inclined surfaces 21 on the top of the upper needle head 2, the top of the upper needle head 2 is made into a quadrangular pyramid, so that the needle tip 22 is absolutely sharp and can easily pierce the oxide layer and the contamination layer, and each inclined surface 21 is mirror-finished according to the existing process, so that the surface of the probe tip is smooth and not easy to adhere to contaminants, and this pyramid-shaped design facilitates the cleaning of the probe needle head 2 to ensure cleanliness during use.

[0041] In the present invention, the term "plurality" refers to two or more than two, unless otherwise expressly defined. The term "and / or" used herein includes any and all combinations of one or more of the relevant listed items. Terms such as "installation", "connection", "connection", and "fixed" should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; "connection" can be a direct connection or an indirect connection through an intermediate medium. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0042] It should be noted that when an element is referred to as being "assembled to," "mounted to," "fixed to," or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only implementation methods.

[0043] Throughout this specification, terms such as "one embodiment," "some embodiments," and "specific embodiments" mean that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, schematic representations of these terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0044] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and purpose of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A spring probe that resists fouling, characterized in that: The invention comprises a cavity (1), an upper needle head (2) installed at the upper end of the cavity (1), and a lower needle head (3) installed at the lower end of the cavity (1), wherein the lower end of the upper needle head (2) is fixed in the inner hole of the upper end of the cavity (1), and the lower needle head (3) is movably arranged in the inner hole of the lower end of the cavity (1), and the top end of the upper needle head (2) is provided with a plurality of inclined surfaces (21), and the plurality of inclined surfaces (21) make the top end of the upper needle head (2) pyramidal and have a needle tip (22), and the needle tip (22) is on the same vertical line as the center of the cavity (1) and the upper needle head (2).

2. The anti-fouling spring probe according to claim 1, characterized in that: The angle values ​​of each pyramid-shaped inclined surface (21) at the top end of the upper needle head (2) with the needle tip (22) as the intersection point are all equal.

3. The anti-fouling spring probe according to claim 1, characterized in that: Four inclined surfaces (21) are provided, and the top end of the upper needle head (2) is in the shape of a quadrangular pyramid.

4. The anti-fouling spring probe according to claim 1, characterized in that: The plurality of inclined surfaces (21) are highly smooth mirror surfaces.

5. The anti-fouling spring probe according to claim 1, characterized in that: The plug of the lower needle (3) consists of a first cylindrical section (31), a connecting section (32) and a second cylindrical end (33), wherein the first cylindrical section (31) is connected to the second cylindrical end (33) via the connecting section (32), and the outer diameter of the first cylindrical section (31) is larger than the outer diameter of the second cylindrical end (33).

6. The anti-fouling spring probe according to claim 5, characterized in that: The first cylindrical section (31), the connecting section (32) and the second cylindrical end (33) are integrally formed.

7. The anti-fouling spring probe according to claim 6, characterized in that: The end of the second cylindrical end (33) away from the connecting section (32) is a hemisphere.

8. The anti-fouling spring probe according to claim 1, characterized in that: Four rivet holes (4) are provided on the upper side wall of the cavity (1), and the four rivet holes (4) are evenly distributed along the circumferential direction of the cavity (1).

9. The anti-fouling spring probe according to claim 1, characterized in that: The inner cavity of the cavity (1) is provided with a buffer spring (5), and the two ends of the buffer spring (5) respectively contact the lower end surface of the upper needle (2) and the upper end surface of the lower needle (3).

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