Conductive jig for electroplating

Abstract

The present invention provides a conductive fixture for electroplating, which includes a base, a top cover and a conductive post. The bottom of the conductive post penetrates the base, a first guide part is provided on the base, a second guide part is provided on the conductive post, at least one of the first guide part and the second guide part extends spirally from bottom to top, and a scraper is provided on the bottom of the conductive post. The present application uses the scraper on the bottom of the conductive post to clean the crystals on the conductive sheet, thereby ensuring good contact and improving the stability of the current and voltage during the electroplating process.

Description

Technical Field

[0001] The present invention relates to the technical field of electroplating, and particularly to a conductive jig for electroplating.

Background Art

[0002] The electrolytic plating process is generally applied in the process of forming metal bumps, enabling the growth of bumps within the paint formed by photoresist. In the electrolytic plating process, the substrate is placed in an electrolytic plating bath, and the surface of the pad is covered with a metal layer by utilizing the reaction of the electrodes, ultimately forming bumps.

[0003] The electroplating process is widely applied in the field of electronics manufacturing. The existing electroplating process is mainly implemented by an electroplating apparatus equipped with a conductive jig and a conductive sheet. The existing conductive jig is generally a post-shaped conductive wire, which is in electrical contact with the conductive sheet. Due to the characteristics of the plating bath itself, the conductive sheet immersed in the plating bath is prone to crystallization, resulting in poor contact between the conductive jig and the conductive sheet, and abnormal currents and voltages may occur.

Summary of the Invention

[0004] The technical problem to be solved by the present application is to provide a conductive jig for electroplating that improves the problem of poor contact between the conductive sheet and the conductive jig due to crystallization in the prior art.

[0005] To solve the above technical problem, the present application provides a conductive jig for electroplating, including a base, a top cover fitted with the base, a receiving cavity provided between the base and the top cover, and a lifting conductive post received in the receiving cavity. The lower end of the conductive post penetrates downward through the base and extends outside the receiving cavity. A first guide portion is provided on the base, a second guide portion that fits with the first guide portion is provided on the conductive post, at least one of the first guide portion and the second guide portion extends spirally from bottom to top, and a scraper is provided at the lower end of the conductive post. Under the action of an external force, the lower end of the conductive post moves toward the accommodation cavity, and during the movement process, the conductive post rotates under the interaction of the first guide portion and the second guide portion, and after the external force action is released, the conductive post moves to restore.

[0006] Furthermore, the accommodation cavity includes an upper cavity and a lower cavity formed on the base, and the first guide portion is formed on the inner wall surface of the lower cavity and protrudes into the lower cavity.

[0007] Furthermore, the lower cavity penetrates downward through the bottom surface of the base and a lower opening is formed on the bottom surface, and the first guide portion is a protruding rib that extends spirally and extends from top to bottom to the position of the lower opening.

[0008] Furthermore, the conductive post includes an upper column body accommodated in the upper cavity and a lower column body accommodated in the lower cavity, and the second guide portion is a groove that extends spirally and is formed on the circumferential surface of the lower column body and extends from top to bottom.

[0009] Furthermore, the conductive post includes an upper column body, a lower column body, a contact base connected between the upper column body and the lower column body, and a spring fitted on the upper column body. An annular support portion is formed at the bottom of the upper cavity, the support portion supports the contact base upward, and the contact base supports the spring upward.

[0010] Furthermore, the conductive post further includes a telescopic guide rod accommodated in the upper column body and the lower column body, an elastic member is fitted on the telescopic guide rod, and the elastic member is accommodated in the lower column body.

[0011] Furthermore, a receiving groove and a through hole are formed inside the lower column body, the elastic member is received in the receiving groove, the through hole extends downward and penetrates to the end face at the bottom of the conductive post, the lower end of the telescopic guide rod is received in the through hole, and the upper end of the telescopic guide rod extends upward and protrudes to the upper surface of the upper column body.

[0012] Furthermore, the scraper includes three scraping strips formed in a three-pronged star shape, and the width of the scraping strips gradually decreases radially from the inside to the outside.

[0013] Furthermore, a circular bottom surface is provided at the lower end of the conductive post, and the scraper extends linearly and passes through the center of the circular bottom surface.

[0014] The electroplating conductive jig includes a base and a lifting conductive post mounted inside the base. The conductive post is fitted to the base through a spiral guide part so that the conductive post rotates while moving up and down. A scraper exposed below the base is provided at the lower end of the conductive post.

Advantages of the Invention

[0015] Compared with the prior art, in this application, spiral first and second guide parts that are fitted to each other are provided on the base and the conductive post. Therefore, each time the electroplating conductive jig is lifted or placed down, the conductive post can be driven to rotate forward and backward, so that the crystals on the conductive sheet can be cleaned by the scraper at the lower end of the conductive post, ensuring good contact between the conductive post and the conductive sheet, and improving the stability of current and voltage.

Brief Description of the Drawings

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Mode for Carrying Out the Invention

[0017] It should be understood that the embodiments described below with reference to the accompanying drawings are exemplary and are used to interpret the present invention and do not limit the present invention.

[0018] <First Embodiment> Figures 1 to 7 show the first embodiment of the present application. In this embodiment, an electroplating conductive jig 100 is provided. This jig includes a base 10, a top cover 20, and a conductive post 30 housed in the base 10. The lower end of the conductive post 30 protrudes downward from the base 10, the lower end of the conductive post 30 is in contact with the conductive sheet 200, and at least one scraper 36 is provided at the lower end of the conductive post 30. When the conductive post 30 is in contact with the conductive sheet 200, the conductive post 30 rotates while undergoing telescopic movement upward under the contact pressure, whereby the scraper 36 rubs the surface of the conductive sheet 200 to scrape off the crystals on the surface of the conductive sheet 200, ensuring stable and reliable electrical contact between the conductive post 30 and the conductive sheet 200.

[0019] The base 10 is cylindrical and includes an upper surface 11, a bottom surface 12, and a receiving cavity 13 between the upper surface 11 and the bottom surface 12. The receiving cavity 13 penetrates the upper surface 11 and the bottom surface 12 in the vertical direction, and an upper opening 14 and a lower opening 15 are respectively formed on the upper surface 11 and the bottom surface 12. The upper opening 14 and the lower opening 15 are preferably circular. The size of the upper opening 14 is larger than the size of the lower opening 15, and a support portion 16 is provided in the receiving cavity 13. The support portion 16 is preferably annular, and the support portion 16 is used to support the conductive post 30 upward. Due to the presence of the support portion 16, the receiving cavity 13 is divided into two upper and lower parts, namely an upper cavity 131 and a lower cavity 132. As shown in FIG. 3, the upper cavity 131 corresponds to the upper opening 14, and the lower cavity 132 corresponds to the lower opening 15. Specifically, the upper cavity 131 penetrates the upper surface 11 upward to form the upper opening 14, and the lower cavity 132 penetrates the bottom surface 12 downward to form the lower opening 15. The support portion 16 is located at the bottom of the upper cavity 131, and the lower cavity 132 is located inside the support portion 16. Preferably, the lower cavity 132 is located in the central region of the support portion 16. A first guide portion 17 is formed on the inner wall surface of the lower cavity 132. The first guide portion 17 extends in a curved shape from top to bottom to the position of the lower opening 15. The first guide portion 17 is fitted to the conductive post 30 and used to guide the vertical movement of the conductive post 30.

[0020] The top cover 20 of the electroplating conductive jig 100 is also cylindrical, is disposed on the base 10 to seal the conductive post 30 inside, and a retraction space for the upward movement of the conductive post 30 is provided in the top cover 20, and a retraction cavity 21 for realizing the vertical telescopic movement of the conductive post 30 is provided.

[0021] The conductive post 30 includes an upper column 31, a lower column 32, a contact base 33 connected between the upper column 31 and the lower column 32, and a spring 34 fitted on the upper column 31. Both the upper column 31 and the lower column 32 are cylindrical. The upper column 31 is thicker than the lower column 32. The upper column 31, the lower column 32, and the contact base 33 are integrally formed. Here, the upper column 31, the contact base 33, and the spring 34 are all accommodated in the upper cavity 131 of the accommodation cavity 13. The upper end of the upper column 31 protrudes upward from the upper cavity 131 and enters the retraction cavity 21 of the top cover 20. The lower column 32 is accommodated in the lower cavity 132, and the lower end of the lower column 32 protrudes downward from the lower cavity 132. The lower column 32 abuts against the conductive sheet 200. The contact base 33 is circular and protrudes from the circumferential surfaces of the upper column 31 and the lower column 32. The contact base 33 is supported by the support portion 16 to limit the vertical movement of the conductive post 30. The spring 34 is fitted on the upper column 31. The bottom of the spring 34 directly abuts on the contact base 33, and the top of the spring 34 directly abuts on the top cover 20. In addition, a circular bottom surface 35 is further formed at the lower end of the lower column 32, and a scraper 36 that abuts against the conductive sheet 200 is provided on the circular bottom surface 35. Preferably, the scraper includes three scraping strips 37. The three scraping strips 37 are formed in a three-pronged star shape. The three scraping strips 37 are uniformly distributed along the circumferential direction of the circular bottom surface 35. The three scraping strips 37 are integrally connected. Each of the scraping strips 37 extends linearly through the center of the circular bottom surface 35. The width of the scraping strip 37 is designed to gradually change. That is, it gradually narrows in the direction away from the center of the circular bottom surface 35. That is, the width of the scraping strip 37 gradually decreases radially from the inside to the outside.

[0022] In this embodiment, a second guide portion 38 is provided on the circumferential surface of the lower column body 32 so that the conductive post 30 can move up and down smoothly. The second guide portion 38 extends upward from the circular bottom surface 35 to the upper end of the lower column body 32. As shown in FIGS. 6 and 7, in order to correspond to the first guide portion 17, the second guide portion 38 extends in a curved shape from bottom to top, so that it can be fitted with the first guide portion 17.

[0023] As shown in FIG. 6, in actual operation, during the process of moving the electroplating conductive jig downward, when the lower end of the conductive post 30 is pressed against the conductive sheet 200, the conductive post 30 may be subjected to an upward pressing action. Due to the mutual cooperation and guidance of the first guide portion 17 and the second guide portion 38, the lower end of the conductive post 30 can be displaced upward and move into the accommodation cavity in the base 10. At this time, the spring 34 is compressed upward, and since both the first guide portion 17 and the second guide portion 38 are designed to extend in a spiral shape, the conductive post 30 rotates while being displaced upward. That is, under the action of an external force, the conductive post 30 moves upward in a spiral shape under the action of the first guide portion 17 and the second guide portion 38, and further, the scraper 36 at the lower end of the lower column body 32 of the conductive post 30 also rotates synchronously. The rotating scraper 36 can effectively rub the surface of the conductive sheet 200 to remove crystals or dirt on the surface of the conductive sheet 200. After the external force action is released, the conductive post 30 moves to restore. Due to the presence of the spring 34, when the electroplating conductive jig is lifted, the conductive post 30 can also restore itself. During the restoration process, the lower end of the conductive post 30 rotates while moving downward. Therefore, during the up and down movement process of the conductive post 30, the scraper 36 at its lower end rotates forward and backward.

[0024] <Second Embodiment> Figures 8 to 12 show the second embodiment of the present application. In this embodiment, the operation method of the electroplating conductive jig 100' is the same as that of the first embodiment. That is, in both cases, the conductive post 30' is pressed downward against the conductive sheet 200 to rotate the lower end of the conductive post 30', and the surface of the conductive sheet 200 is rubbed by the scraper 36' at the lower end to remove crystals or dirt on the surface of the conductive sheet 200. Note that except for the conductive post 30', the structures of the base 10' and the top cover 20' in the second embodiment are the same as those in the first embodiment. Therefore, hereinafter, only the structure of the conductive post 30' in the second embodiment will be described in detail.

[0025] The conductive post 30' includes an upper column body 31', a lower column body 32', a contact base 33' connected between the upper column body 31' and the lower column body 32', a spring 34' fitted on the upper column body 31', and a telescopic guide rod 35' penetrating through the interiors of the upper column body 31' and the lower column body 32'. Here, a circular cover plate 310' is disposed at the top of the upper column body 31', the lower end of the lower column body 32' protrudes downward from the base 10', and a second guide portion 38' is also provided on the circumferential surface of the lower column body 32'. The second guide portion 38' cooperates with the first guide portion 17' within the base 10'. Since both the first guide portion 17' and the second guide portion 38' extend in a curved shape, the lower column body 32' performs a rotational movement due to their mutual cooperation (the same as in the first embodiment, and no repeated description). A receiving groove 321' and a through hole 322' are further formed inside the lower column body 32', and the through hole 322' communicates with the receiving groove 321'. The through hole 322' extends downward from the bottom of the receiving groove 321' and penetrates the circular bottom surface 39' of the lower column body 32'. The upper end of the telescopic guide rod 35' penetrates the cover plate 310' upward and protrudes from the surface of the cover plate 310'. The telescopic guide rod 35' is provided with an elongated rod body 351' and an elongated rod tip 352'. The rod body 351' is thicker than the rod tip 352', and the upper end of the rod body 351' penetrates the cover plate 310' upward and is exposed on the surface of the cover plate 310'. The rod body 351' penetrates the upper column body 31' from top to bottom and protrudes into the receiving groove 321' of the lower column body 32', and the rod tip 352' extends further downward from the lower end of the rod body 351' and enters the through hole 322'. An elastic member 353' is further fitted on the surface of the rod tip 352'. The elastic member 353' is received within the receiving groove 321', and the elastic member 353' is preferably a spring, the upper end of which abuts against the rod body 351' upward, and the lower end of which abuts against the groove bottom wall of the receiving groove 321' downward.

[0026] Furthermore, a scraper 36' is also provided on the circular bottom surface of the lower column body 32'. The scraper 36' is linear, and its shape is different from the three-pronged star structure in the first embodiment. The linear scraper 36' passes through the center position of the circular bottom surface 39', and both ends of the scraper 36' have a relatively long length of the linear scraper 36' and extend to the periphery of the circular bottom surface 39' so as to promote the rubbing effect.

[0027] In actual operation, the upper end of the telescopic guide rod 35' (i.e., the upper end of the rod body 351') is pressed to project the lower end of the telescopic guide rod 35' (i.e., the lower end of the rod tip 352') downward from the through hole 322' to expose it on the bottom surface of the lower column body 32', and contact the conductive sheet 200. After the pressure at the upper end of the telescopic guide rod 35' is released, under the action of the elastic member 353', the lower end of the telescopic guide rod 35' is drawn into the through hole 322', and the contact with the conductive sheet 200 is released.

[0028] Thus, compared with the first embodiment, in the second embodiment of the present application, a telescopic guide rod 35' is provided inside the conductive post 30', a receiving groove 321' and a through hole 322' are provided inside the lower column body 32', and two repulsive elements of the spring 34' and the elastic member 353' promote the lowering and rising of the conductive post 30' to realize pressing and restoration. Furthermore, the telescopic guide rod 35' built in the conductive post 30' can be pressed and extended downward after the scraper 36' rubs the crystal, so that it can be abutted against the conductive sheet 200 to achieve a better conduction effect.

[0029] Preferably, for the first guide portion 17 in the first embodiment, the first guide portion 17' in the second embodiment, the second guide portion 38 in the first embodiment, and the second guide portion 38' in the second embodiment, it is preferable that they extend upward from the bottom in a spiral curve. The first guide portions 17, 17' are protruding ribs that are curved and extended in a spiral shape, and the second guide portions 38, 38' are grooves that are curved and extended in a corresponding spiral shape. By combining the protruding ribs and the grooves, the same cooperation effect as that of a sliding groove and a sliding rail can be obtained. Of course, the first guide portions 17, 17' can also be designed only as bumps provided on the inner surface of the lower cavity instead of being elongated protruding ribs that are curved and extended in a spiral shape. Similarly, they can be engaged in the grooves (i.e., the second guide portions 38, 38') and can slide in a curved shape within the grooves, driving the lower column to rotate and achieving the rotation of the scrapers 36, 36'. That is, at least one of the first guide portions 17, 17' and the second guide portions 38, 38' only needs to extend in a spiral shape. Furthermore, the positions of the grooves and the protruding ribs can also be interchanged.

[0030] As described above, whether it is the first embodiment or the second embodiment, in this application, the structures of the electroplating conductive jigs 100, 100' are optimized, and by providing the first guide portions 17, 17' and the second guide portions 38, 38' that extend spirally and cooperate with each other on the base and the conductive posts, every time the electroplating conductive jigs 100, 100' are lifted, the conductive posts 30, 30' can be driven to rotate forward and backward, and the crystals on the conductive sheet 200 can be cleaned by the scrapers 36, 36' at the lower ends of the conductive posts 30, 30', ensuring good contact between the conductive posts 30, 30' and the conductive sheet 200, and improving the stability of current and voltage.

[0031] The structure, features, and effects of the present invention have been described in detail using the embodiments shown in the accompanying drawings above. The above are only preferred embodiments of the present invention. The scope of implementation of the present invention is not limited by the drawings, and equivalent embodiments obtained by making equivalent changes or modifications without departing from the spirit shown in the specification and the accompanying drawings and in accordance with the idea of the present invention are all included within the protection scope of the present invention.

Claims

Claim 1 It includes a base, a top cover fitted to the base, a receiving cavity provided between the base and the top cover, and a liftable conductive post received in the receiving cavity. The lower end of the conductive post penetrates the base downward and extends outside the receiving cavity. A first guide portion is provided on the base, a second guide portion fitted to the first guide portion is provided on the conductive post, at least one of the first guide portion and the second guide portion extends spirally from bottom to top, and a scraper is provided at the lower end of the conductive post. Under the action of an external force, the lower end of the conductive post moves toward the receiving cavity, and during the movement, the conductive post rotates under the interaction of the first guide portion and the second guide portion. After the action of the external force is released, the conductive post moves to restore itself. The conductive jig for electroplating is characterized by this. Claim 2 The receiving cavity includes an upper cavity and a lower cavity formed on the base. The first guide portion is formed on the inner wall surface of the lower cavity and protrudes into the lower cavity. The conductive jig for electroplating according to claim 1 is characterized by this. Claim 3 The lower cavity penetrates downward through the bottom surface of the base and a lower opening is formed on the bottom surface. The first guide portion is a protruding rib that extends spirally and extends from top to bottom to the position of the lower opening. The conductive jig for electroplating according to claim 2 is characterized by this. Claim 4 The conductive post includes an upper column body received in the upper cavity and a lower column body received in the lower cavity. The second guide portion is a groove that extends spirally and is formed on the circumferential surface of the lower column body and extends from top to bottom. The conductive jig for electroplating according to claim 3 is characterized by this. Claim 5 The conductive post includes an upper column body, a lower column body, a contact base connected between the upper column body and the lower column body, and a spring fitted on the upper column body. An annular support portion is formed at the bottom of the upper cavity. The support portion supports the contact base upward, and the contact base supports the spring upward. The conductive jig for electroplating according to claim 2 is characterized by this. Claim 6 The conductive post further includes a telescopic guide rod accommodated in an upper column body and a lower column body, an elastic member is fitted on the telescopic guide rod, and the elastic member is accommodated in the lower column body. The electroplating conductive jig according to claim 5 is characterized by this.

7. A receiving groove and a through hole are formed inside the lower column body. The elastic member is accommodated in the receiving groove. The through hole extends downward and penetrates to the end face at the bottom of the conductive post. The lower end of the telescopic guide rod is accommodated in the through hole, and the upper end of the telescopic guide rod extends upward and protrudes to the upper surface of the upper column body. The electroplating conductive jig according to claim 6 is characterized by this.

8. The scraper includes three scraping strips formed in a three-pronged star shape, and the width of the scraping strips gradually decreases radially from the inside to the outside. The electroplating conductive jig according to claim 1 is characterized by this.

9. A circular bottom surface is formed at the lower end of the conductive post, and the scraper extends linearly and passes through the center of the circular bottom surface. The electroplating conductive jig according to claim 1 is characterized by this.

10. An electroplating conductive jig including a base and a lifting conductive post mounted inside the base. The conductive post is fitted to the base through a spiral guide part so that the conductive post rotates while lifting and lowering. A scraper exposed below the base is provided at the lower end of the conductive post. A spring is fitted on the outside of the conductive post. A receiving cavity is provided in the base. The conductive post and the spring are accommodated in the receiving cavity. Under the action of an external force, the lower end of the conductive post moves toward the receiving cavity, and during the movement, the conductive post rotates under the interaction of the guide part and the base. After the external force action is released, the conductive post moves so as to be restored. The electroplating conductive jig is characterized by this.

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