Miniature bellows processing technology and application

Abstract

The application provides a micro bellows processing technology and application, the micro bellows is formed based on metal material processing, the micro bellows has a main body part, a plurality of extension parts are formed at one end of the main body part, and the plurality of extension parts are symmetrically arranged according to the axis of the main body part respectively.The application processes metal material into a designed shape through mechanical processing, then forms a thin metal plating layer on the periphery through an electrochemical process, cuts the useful part through mechanical processing, and finally corrodes the original metal in the useful part clean through the electrochemical process again, so that the final product is obtained, the micro bellows is simple to install and use, simple to replace, simple to find abnormalities, and small in installation space.

Description

Technical Field

[0001] This invention relates to the field of chip testing technology, and in particular to a micro-corrugated tube processing technology and its application. Background Technology

[0002] With the continuous development of the semiconductor field and the improvement of chip production and R&D capabilities, chips are becoming smaller and more sophisticated. At the same time, various types of smart products are placing increasingly stringent quality control requirements on various types of chips. How to conduct chip testing safely and quickly has become a challenge.

[0003] Existing testing technology uses probe contact electrical connection for testing and inspection. The probe contact electrical connection technology involves soldering probe sleeves onto a circuit board, with springs built into the probe sleeves. The probes are inserted into the probe sleeves. During use, the circuit board is moved to make the probes contact the chip pins and compress them by a certain displacement, so that the springs inside the probe sleeves are in a compressed state, thereby achieving an electrical connection.

[0004] As chips become smaller and thinner, the drawbacks of probe elastic contact electrical connection technology are gradually becoming apparent. The difficulty in processing the probe, the needle sleeve, and the spring inside the needle sleeve is increasing. When the probe is processed too small, the excessive spring pressure can easily damage the chip. Since the spring is installed inside the needle sleeve, it is not easy to detect whether the spring is in good condition, which can lead to misjudgment of test results. The large compression stroke of the probe during testing can cause the spring inside the needle sleeve to fatigue easily. The probe elastic contact electrical connection technology requires a large axial space for testing and installation. Summary of the Invention

[0005] The purpose of this invention is to provide a micro-corrugated tube processing technology and its application. The corrugated elastic contact electrical connection processing method solves the problems that cannot be completed by mechanical processing, as well as the problems that occur during chip testing, such as chip damage due to excessive pressure when using probe contact electrical connection technology, and the inability to use probe contact electrical connection technology for testing.

[0006] This invention provides a micro-corrugated pipe processing technology, which uses machining to process metal material components to form a machined part of a designed shape on the metal material components. The detailed processing steps are as follows:

[0007] S1: Design suitable core mold drawings according to the required dimensions;

[0008] S2: Custom-made special-purpose knives;

[0009] S3: Core molds are machined using high-precision CNC machining centers;

[0010] S4: Full inspection of appearance and dimensions. No scratches, deformation, foreign objects or knife marks are allowed on the appearance. A tracking card is recorded for each product.

[0011] S5: Perform pre-plating treatment on all core molds – degreasing, activation (removing oxide mold), and acid immersion (further removing oxide mold and increasing the adhesion of the plating layer).

[0012] S6: Zinc plating - mainly to increase the adhesion of the core mold surface and prevent "peeling" phenomenon in subsequent electroplating;

[0013] S7: Pre-plating – Treatment using nickel sulfate, sodium hypophosphite, anhydrous sodium citrate and sodium chloride;

[0014] S8: Electroplating - The core mold is placed in the electroplating solution for 90 minutes, and the temperature of the electroplating solution is controlled at around 55℃.

[0015] S9: Rinse – Rinse three times with deionized water to remove any residual electroplating solution from the surface;

[0016] S10: Visual inspection - Place the electroplated core mold under a 3D projector for visual inspection. There should be no "lumps", dents or foreign objects on the surface.

[0017] S11: Secondary electroplating (gold plating) - Place the inspected and OK core mold into the electroplating solution for about 1 minute for electroplating;

[0018] S12: Second rinse - Rinse three times with deionized water to clean the surface of any residual electroplating solution.

[0019] S13: Visual inspection – Place the electroplated core mold under a 3D projector for visual inspection. There should be no “nodules” or foreign objects on the surface.

[0020] S14: Cutting (Shaping) – Cutting is performed using high-precision CNC machine tools;

[0021] S15: Dimensional Inspection – All products undergo full inspection and the relevant data is recorded in the product tracking card;

[0022] S16: Electrolysis (electrochemical treatment) - Electrochemical corrosion using 5% sodium hydroxide, at 55℃ for about 96 to 120 hours;

[0023] S17: Corrosion Inspection - Use 3D projection to observe the internal corrosion of the product. There should be no aluminum alloy residue and no cracks on the surface.

[0024] S18: Pressure test – Bellows pressure test using professional custom-made tooling.

[0025] S19: Life test - After the pressure test is OK, life test is carried out at 2pcs / batch, and the life is not less than 20,000 cycles.

[0026] S20: Packaging – Individual packaging is used to prevent collisions between products.

[0027] This invention provides a micro-corrugated pipe, which is formed based on the processing of metal materials.

[0028] The micro-corrugated pipe has a main body, and a plurality of extensions are formed at one end of the main body. The plurality of extensions are symmetrically arranged with respect to the axis of the main body.

[0029] The present invention also provides an application of a micro-bellows, which is suitable for contact electrical products.

[0030] The micro-corrugated tube is used in a chip testing device, which includes: a micro-corrugated tube, a circuit board, and a mounting sleeve for the connector.

[0031] The mounting sleeve is fixedly installed on the circuit board, the flexible contact electrical connector is inserted into the mounting sleeve, and the chip under test is placed on the flexible contact electrical connector.

[0032] Optionally, the circuit board has pre-drilled pads, and the mounting sleeve is inserted into the pads for soldering and fixing.

[0033] Optionally, the thickness of the circuit board is 1~1.6mm.

[0034] Optionally, the micro-bellows placed under the chip under test is squeezed and deformed by the chip under test, while simultaneously generating a reverse thrust on the chip under test to achieve electrical contact.

[0035] The micro-corrugated tube processing technology and application provided by this invention involves machining metal materials into a designed shape, then forming a thin metal plating layer on its outer surface using an electrochemical process. The useful portion is then removed by machining, and finally, the original metal in the middle is etched away using an electrochemical process again, resulting in the final product—a key component of corrugated flexible contact electrical contact technology called a "corrugated contact." This micro-corrugated tube, as a connector, is simple to install and use, easy to replace, easy to detect malfunctions, and requires little installation space. In particular, different micro-corrugated tubes can be designed for different chip tests, thereby reducing damage to the chip during testing and promoting the development of chip research and development (meeting the chip testing requirements).

[0036] The above and other objects, advantages and features of the present invention will become more apparent to those skilled in the art from the following detailed description of specific embodiments of the invention in conjunction with the accompanying drawings. Attached Figure Description

[0037] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the invention. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0038] Figure 1 This is a schematic diagram of the processing technology of the micro-corrugated tube according to an embodiment of the present invention;

[0039] Figure 2 This is a schematic diagram of a miniature bellows according to an embodiment of the present invention;

[0040] Figure 3 This is a schematic diagram of a chip testing device according to an embodiment of the present invention;

[0041] Among them, 10-micro bellows, 11-main body, 12-extension, 20-circuit board, 30-micro bellows mounting sleeve, and 40-chip under test. Detailed Implementation

[0042] The embodiments of the present invention are described below with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are only used to explain the present invention and are not restrictive.

[0043] This invention provides a micro-corrugated pipe processing technology, which uses machining to process metal material components to form a machined part of a designed shape on the metal material components. The detailed processing steps are as follows:

[0044] S1: Design suitable core mold drawings according to the required dimensions;

[0045] S2: Custom-made special-purpose knives;

[0046] S3: Core molds are machined using high-precision CNC machining centers;

[0047] S4: Full inspection of appearance and dimensions. No scratches, deformation, foreign objects or knife marks are allowed on the appearance. A tracking card is recorded for each product.

[0048] S5: Perform pre-plating treatment on all core molds – degreasing, activation (removing oxide mold), and acid immersion (further removing oxide mold and increasing the adhesion of the plating layer).

[0049] S6: Zinc plating - mainly to increase the adhesion of the core mold surface and prevent "peeling" phenomenon in subsequent electroplating;

[0050] S7: Pre-plating – Treatment using nickel sulfate, sodium hypophosphite, anhydrous sodium citrate and sodium chloride;

[0051] S8: Electroplating - The core mold is placed in the electroplating solution for 90 minutes, and the temperature of the electroplating solution is controlled at around 55℃.

[0052] S9: Rinse – Rinse three times with deionized water to remove any residual electroplating solution from the surface;

[0053] S10: Visual inspection - Place the electroplated core mold under a 3D projector for visual inspection. There should be no "lumps", dents or foreign objects on the surface.

[0054] S11: Secondary electroplating (gold plating) - Place the inspected and OK core mold into the electroplating solution for about 1 minute for electroplating;

[0055] S12: Second rinse - Rinse three times with deionized water to clean the surface of any residual electroplating solution.

[0056] S13: Visual inspection – Place the electroplated core mold under a 3D projector for visual inspection. There should be no “nodules” or foreign objects on the surface.

[0057] S14: Cutting (Shaping) – Cutting is performed using high-precision CNC machine tools;

[0058] S15: Dimensional Inspection – All products undergo full inspection and the relevant data is recorded in the product tracking card;

[0059] S16: Electrolysis (electrochemical treatment) - Electrochemical corrosion using 5% sodium hydroxide, at 55℃ for about 96 to 120 hours;

[0060] S17: Corrosion Inspection - Use 3D projection to observe the internal corrosion of the product. There should be no aluminum alloy residue and no cracks on the surface.

[0061] S18: Pressure test – Bellows pressure test using professional custom-made tooling.

[0062] S19: Life test - After the pressure test is OK, life test is carried out at 2pcs / batch, and the life is not less than 20,000 cycles.

[0063] S20: Packaging – Individual packaging is used to prevent collisions between products.

[0064] In other words, combining Figure 1 As can be seen, in the embodiment of the present invention, when processing the micro-corrugated tube 10, the metal material is processed into the designed shape by mechanical processing, and then a thin metal plating layer is formed on its outer surface by electrochemical process. The useful part is removed by mechanical processing, and finally the useful part is used again by electrochemical process to etch the original metal in the middle clean, thereby obtaining the final product - the key component of corrugated flexible contact electrical contact technology, "corrugated contact".

[0065] This invention also provides a micro-corrugated pipe 10 formed based on the above-described processing technology, such as... Figure 2 As shown, the micro-corrugated pipe 10 is formed based on metal material. The micro-corrugated pipe 10 has a main body 11, and a plurality of extensions 12 are formed at one end of the main body 11. The plurality of extensions 12 are symmetrically arranged with respect to the axis of the main body 11.

[0066] The miniature bellows of this embodiment can be applied to contact electrical products, such as switches, relays, sockets, connectors, etc. As a preferred embodiment, the miniature bellows of this embodiment is used in a chip testing device. Figure 3 As shown, the chip testing device of this embodiment includes: a micro-corrugated tube 10, a circuit board 20, and a micro-corrugated tube mounting sleeve 30; the micro-corrugated tube mounting sleeve 30 is fixedly disposed on the circuit board 20, a flexible contact electrical connector is inserted into the micro-corrugated tube mounting sleeve 30, and the chip to be tested 40 is placed on the flexible contact electrical connector.

[0067] Optionally, the circuit board 20 has pre-reserved pads, and the micro-bellows mounting sleeve 30 is inserted into the pads for soldering and fixing. During chip testing, the micro-bellows 10 and micro-bellows mounting sleeve 30 are inserted into the pre-reserved pads on the circuit board 20 for soldering and fixing, and then the bellows are inserted into the sleeve.

[0068] When the chip squeezes the micro-bellows 10, the micro-bellows 10 will be squeezed and deformed. During the deformation process, the micro-bellows 10 will also exert a reverse thrust on the chip, but the thrust is very small and not enough to damage the chip, so it will not cause test loss or damage to the chip. After the chip test is completed, the chip is removed from the micro-bellows 10 and is no longer subjected to the squeezing force, and the micro-bellows 10 returns to its free state.

[0069] Based on this embodiment, the micro-bellows 10 can realize the corrugated elastic contact electrical connection technology. That is to say, since the chip test chip pins and the chip cannot be subjected to a large force to avoid test loss and damage, we utilize the toughness of the metal material. The better the toughness, the smaller the possibility of brittle fracture. When the metal material is thinner, it will deform under a very small force. Therefore, the wall thickness of the micro-bellows 10 is made very thin in all embodiments of the invention. Since the overall size of the micro-bellows 10 is very small and cannot be completed by mechanical processing, the embodiments of the invention utilize chemical principles to use electrochemical processes—electroplating and chemical etching processes—to complete the processing and shaping of the micro-bellows 10.

[0070] The above description is merely a preferred embodiment of the present invention. The scope of protection of the present invention is not limited to the above embodiments. All technical solutions falling within the scope of the present invention's concept are within the scope of protection of the present invention. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principles of the present invention should also be considered within the scope of protection of the present invention.

Claims

1. A method for processing a miniature corrugated pipe, characterized in that, The micro-corrugated pipe includes a main body (11), and a plurality of extensions (12) are formed at one end of the main body (11). The plurality of extensions (12) are symmetrically arranged with respect to the axis of the main body (11). The processing method of the micro-bellows includes: S1: Using a high-precision CNC machining center to process miniature corrugated tube core molds made of metal materials; S2: Full inspection of appearance and dimensions. No scratches, deformation, foreign objects or knife marks are allowed on the appearance. A tracking card is recorded for each product. S3: Perform pre-plating treatment on all core molds, including degreasing, activation, and acid immersion; S4: Galvanized; S5: Pre-plating, treated with nickel sulfate, sodium hypophosphite, anhydrous sodium citrate and sodium chloride; S6: Electroplating, placing the core mold in an electroplating solution for electroplating; S7: Rinse three times with deionized water to remove any residual electroplating solution from the surface. S8: Visual inspection, place the electroplated core mold under a 3D projector for visual inspection; S9: Secondary electroplating, the core mold that has passed the visual inspection is placed in the electroplating solution for 1 minute of electroplating; S10: Second rinse, rinse three times with deionized water to clean the surface of residual electroplating solution; S11: Visual inspection, place the electroplated core mold under a 3D projector for visual inspection; S12: Cutting, using high-precision CNC machine tools for cutting processing; S13: Size inspection. All products undergo full inspection, and the relevant data is recorded in the product tracking card. S14: Electrolysis, using 5% sodium hydroxide for electrochemical corrosion, corrosion at 55℃ for 96-120 hours; S15: Corrosion inspection. Use 3D projection to observe the internal corrosion of the product. There should be no aluminum alloy residue and no cracks on the surface. S16: Pressure test, using professionally customized tooling to perform pressure testing on miniature bellows; S17: Life test. After the stress test is completed, life test shall be carried out in batches of 2 pieces, and the life shall be no less than 20,000 cycles. S18: Packaging. Each item is individually packaged using professional packaging boxes to prevent them from colliding with each other.

2. The processing method of the micro-corrugated tube according to claim 1, characterized in that, In step S6, the electroplating time in the electroplating solution is 90 minutes, and the temperature of the electroplating solution is controlled at 55°C.

3. A micro-corrugated pipe obtained by the processing method of claim 1, characterized in that, The miniature corrugated tube is suitable for contact electrical products.

4. The micro-corrugated pipe according to claim 3, characterized in that, The micro-corrugated tube is used in a chip testing device, which includes: a micro-corrugated tube (10), a circuit board (20), and a micro-corrugated tube mounting sleeve (30). A miniature corrugated tube mounting sleeve (30) is fixedly mounted on the circuit board (20), a flexible contact electrical connector is inserted into the miniature corrugated tube mounting sleeve (30), and the chip under test (40) is placed on the flexible contact electrical connector.

5. The micro-corrugated pipe according to claim 4, characterized in that, The circuit board (20) has reserved solder pads, and the micro-corrugated pipe mounting sleeve (30) is inserted into the solder pads for soldering and fixing.

6. The micro-bellows according to claim 4, characterized in that, The thickness of the circuit board (20) is 1~1.6mm.

7. The miniature bellows according to any one of claims 4-6, characterized in that, The micro-bellows (10) placed under the chip under test (40) is squeezed and deformed by the chip under test (40), and at the same time generates a reverse thrust on the chip under test (40) to achieve electrical contact.

Images