Low-sensitivity high-voltage-resistant interface

Abstract

The utility model discloses a low-sensitivity high-voltage-resistant interface which comprises a supporting base assembly, an elastic piece copper bar assembly and a fixing frame. An inserting notch is formed in the middle of the supporting base assembly; the elastic sheet copper bar assembly comprises a first copper bar and a second copper bar which are symmetrically arranged, and a first elastic sheet and a second elastic sheet which are symmetrically arranged; the first copper bar and the second copper bar are connected with the supporting base assembly through a fixing frame, the first elastic piece and the second elastic piece are connected to the first copper bar and the second copper bar respectively and located between the first copper bar and the second copper bar, and the first elastic piece and the second elastic piece are bent oppositely. And a gap between the first elastic sheet and the second elastic sheet is aligned with the position of the plugging notch. The beneficial effects of the utility model are that: through the preliminary spacing of the plugging notch and the elastic contact, the plugging of the interface is smoother, and the plugging is easy.

Description

Technical Field

[0001] The utility model relates to a semiconductor testing device, in particular to an interface. Background Art

[0002] At present, the domestic semiconductor industry is developing rapidly. Semiconductors are widely used in artificial intelligence, Internet of Things, 5G, new energy and other fields. Technology is developing rapidly, and updates and iterations are accelerating. It has now developed into the fourth generation of semiconductor materials, using gallium oxide (GA2O3) and diamond compounds as semiconductor materials, which can achieve higher voltage resistance, smaller volume, and lower energy consumption, and can effectively reduce energy losses in new energy vehicles, rail transit, renewable energy power generation and other fields. In this case, the demand for testing equipment for semiconductor products is increasing. The requirements for equipment are also getting higher and higher, and performance, precision, cost control, etc. are the key expansion directions of major host manufacturers.

[0003] There are many types of interfaces nowadays. Most interfaces use DB head wire connection. This type of interface is inconvenient to connect. The working conditions that a single connection line can adapt to are relatively limited. When there are a large number of them, the space of the test chamber is seriously affected, and there is a risk of error through manual plug-in. Other interfaces are connected to the test equipment by plugging in the male and female European terminals welded on the PCB. This method is a hard connection, which has high requirements for the processing and assembly of equipment parts. In addition, it also has high requirements for welding technology. There is a great risk of difficulty in plugging in, and the adjustment space is small, which is not suitable for batch products. The current test requirements have high requirements for the amount of stray inductance (stray inductance is the unwanted inductance generated by the conductors in the circuit, such as connecting wires, component leads and component bodies, due to electromagnetic induction). The design of the mechanical interface will also be a factor in the increase of stray inductance in the test equipment.

[0004] The information disclosed in this background technology section is only intended to increase the understanding of the overall background of the utility model, and should not be regarded as acknowledging or suggesting in any form that the information constitutes the prior art known to ordinary technicians in this field. Utility Model Content

[0005] The technical problem to be solved by the utility model is: how to solve the problems of inconvenient interface connection and difficult plugging.

[0006] The utility model solves the above technical problems through the following technical means:

[0007] Low-inductance and high-voltage resistant interface, including support base assembly, spring copper busbar assembly, and fixing frame;

[0008] A plug-in slot is provided in the middle of the support base assembly;

[0009] The spring-type copper bar assembly comprises a symmetrically arranged first copper bar, a second copper bar and a symmetrically arranged first spring type and second spring type; the first copper bar and the second copper bar are connected to the supporting base assembly via a fixing frame, the first spring type and the second spring type are respectively connected to the first copper bar and the second copper bar and are located between the two, the first spring type and the second spring type are relatively bent, and the gap between the first spring type and the second spring type is aligned with the position of the plug-in slot.

[0010] When the utility model is used, the PCB at the test equipment end is inserted from the plug-in slot, and the PCB is attached with copper foil, which can contact with the first spring sheet and the second spring sheet installed above and below, and then conduct; the first copper bar and the second copper bar can fix the first spring sheet and the second spring sheet, and the gap between the first spring sheet and the second spring sheet is used for limiting, and the first spring sheet and the second spring sheet are relatively curved, and the PCB at the fixture end or other types of electrodes are directly inserted in the elastic contact area to achieve contact conduction. The utility model makes the insertion of the interface smoother and easier to plug in through the initial limit of the plug-in slot and the elastic contact.

[0011] Preferably, the fixing frame includes a first fixing member and a second fixing plate, the first fixing member is an angular structure, the side of the first fixing member is connected to the side of the supporting base assembly, the bottom of the first fixing member is connected to the second fixing plate, and the first copper busbar is connected to the second fixing plate.

[0012] Preferably, there are a plurality of fixing frames, and the fixing frames are symmetrically arranged along a horizontal symmetry plane between the first copper bar and the second copper bar.

[0013] Preferably, waist-shaped holes are respectively provided on the side and bottom surfaces of the first fixing member, the first fixing member is connected to the supporting base assembly by bolts passing through the waist-shaped holes, and the bottom surface of the first fixing member is connected to the first copper busbar and / or the second copper busbar by bolts passing through the waist-shaped holes.

[0014] Preferably, one end of the first spring sheet is bent, and after bending, it is connected to the end of the first copper bar by bolts, and the other end of the first spring sheet protrudes toward the second spring sheet; one end of the second spring sheet is bent, and after bending, it is connected to the end of the second copper bar by bolts, and the other end of the second spring sheet protrudes toward the first spring sheet.

[0015] The detachable structure in which the shrapnel and the copper bar are connected by bolts facilitates the regular replacement of the beryllium copper shrapnel.

[0016] Preferably, avoidance slots are provided on the support base assembly at the connection between the first spring sheet and the first copper bar and at the connection between the second spring sheet and the second copper bar.

[0017] Preferably, the first spring piece and the second spring piece are both formed by stacking a plurality of spring pieces.

[0018] The first spring sheet and the second spring sheet can be stacked according to the thickness of the electrodes to be inserted, which increases the test types and also increases the elasticity of the first spring sheet and the second spring sheet. Since the first spring sheet and the second spring sheet are very short and the beryllium copper material used in the first spring sheet and the second spring sheet has a high conductivity, the stray inductance of the interface will be controlled within a certain range. It can ensure that the voltage of 8-10KV passes through the interface, the contact is good, and the spark phenomenon is avoided.

[0019] Preferably, it also includes a copper bar support, which is connected to the first copper bar and the second copper bar at one end away from the support base assembly, and one side of the copper bar support has a cantilever, and a limiting slot is opened at one end of the cantilever facing the first spring sheet and the second spring sheet, and a plug-in channel is formed between the plug-in slot and the first spring sheet and the second spring sheet and between the limiting slots.

[0020] On the one hand, the copper bar support can support the first copper bar and the second copper bar at the upper and lower parts. On the other hand, the copper bar support has a limiting slot, which is a limiting position for the inserted PCB and plays a certain guiding and limiting role to improve stability.

[0021] Preferably, it further comprises an epoxy fixing piece, which is ring-shaped and sleeved on the outside of the first copper bar and the second copper bar and connected thereto.

[0022] Preferably, the support base assembly includes a first support base, a second support base, and a slot fixing plate, the first support base and the second support base are located at the upper and lower parts of the slot fixing plate, the first support base, the second support base, and the side surfaces of the slot fixing plate are all configured for installation on the connecting holes of the test cabin, and the middle part of the slot fixing plate has a plug-in slot.

[0023] The advantages of the utility model are:

[0024] (1) When the utility model is used, the PCB at the test equipment end is inserted from the plug-in slot. The PCB is attached with copper foil, which can contact the first spring sheet and the second spring sheet installed above and below, thereby achieving conduction. The first copper bar and the second copper bar can fix the first spring sheet and the second spring sheet. The gap between the first spring sheet and the second spring sheet is used for limiting. The first spring sheet and the second spring sheet are relatively curved, and the PCB at the fixture end or other types of electrodes are directly inserted in the elastic contact area to achieve contact and conduction. The utility model makes the insertion of the interface smoother and the plug-in easier through the initial limiting of the plug-in slot and the elastic contact.

[0025] (2) The shrapnel and copper bar are connected by bolts and can be detached to facilitate the regular replacement of the beryllium copper shrapnel;

[0026] (3) The first spring sheet and the second spring sheet can be stacked and used according to the thickness of the electrodes to be inserted, which increases the test types and also increases the elasticity of the first spring sheet and the second spring sheet. Since the first spring sheet and the second spring sheet are very short and the beryllium copper material used in the first spring sheet and the second spring sheet has a high conductivity, the stray inductance of the interface will be controlled within a certain range. It can ensure that the voltage of 8-10KV passes through the interface, the contact is good, and the spark phenomenon is avoided;

[0027] (4) The copper bar support can support the first copper bar and the second copper bar at the top and bottom. On the other hand, the copper bar support has a limit slot, which is the limit position of the inserted PCB and plays a certain guiding and limiting role to improve stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is a schematic diagram of the structure of a low-inductance and high-voltage resistant interface according to an embodiment of the utility model;

[0029] Figure 2 This is an exploded schematic diagram of a low-inductive and high-voltage resistant interface according to an embodiment of the utility model;

[0030] Figure 3 yes Figure 2 Enlarged view of point D in the middle;

[0031] Figure 4 It is an enlarged schematic diagram of the spring copper bar assembly of the embodiment of the utility model;

[0032] Figure 5 This is a schematic diagram of the structure of a low-inductance and high-voltage resistant interface according to an embodiment of the utility model;

[0033] Figure 6 yes Figure 5 Middle AA initial section view;

[0034] Figure 7 yes Figure 6 Sectional view at FF;

[0035] Figure 8 This is an exploded schematic diagram of a low-inductive and high-voltage resistant interface according to an embodiment of the utility model;

[0036] Fig. 9 This is an exploded schematic diagram of a low-inductive and high-voltage resistant interface according to an embodiment of the utility model;

[0037] Fig.10 This is a cross-sectional view of the connection between the copper bar support and the spring copper bar assembly of the embodiment of the utility model;

[0038] Numbers in the figure:

[0039] 1. Support base assembly; 11. First support base; 12. Second support base; 13. Card slot fixing plate; 131. Insertion notch; 14. Avoidance notch;

[0040] 2. Shrapnel copper bar assembly; 21. First copper bar; 22. Second copper bar; 23. First shrapnel; 24. Second shrapnel;

[0041] 3. Fixing frame; 31. First fixing member; 32. Second fixing plate;

[0042] 4. Copper busbar support; 5. Epoxy fixings. DETAILED DESCRIPTION

[0043] In order to make the purpose, technical solution and advantages of the embodiments of the utility model clearer, the technical solution in the embodiments of the utility model will be clearly and completely described below in combination with the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0044] Embodiment 1:

[0045] like Figure 1-Figure 9 As shown, the low-inductance and high-voltage resistant interface includes a support base assembly 1, a spring copper bar assembly 2, and a fixing frame 3;

[0046] The middle part of the support base assembly 1 is provided with a plug-in slot 131;

[0047] The spring clip copper bar assembly 2 includes a symmetrically arranged first copper bar 21, a second copper bar 22, and a symmetrically arranged first spring clip 23, a second spring clip 24; the first copper bar 21 and the second copper bar 22 are connected to the support base assembly 1 through a fixing frame 3, the first spring clip 23 and the second spring clip 24 are respectively connected to the first copper bar 21 and the second copper bar 22 and are located between the first copper bar 21 and the second copper bar 22, the first spring clip 23 and the second spring clip 24 are relatively bent, and the gap between the first spring clip 23 and the second spring clip 24 is aligned with the position of the plug-in slot 131.

[0048] Specifically, Figure 2 or Fig. 9As shown, the support base assembly 1 includes a first support base 11, a second support base 12, and a slot fixing plate 13. The first support base 11, the second support base 12, and the slot fixing plate 13 are all flat plates, and the three are basically located in the same vertical plane. The first support base 11 and the second support base 12 are located at the upper and lower parts of the slot fixing plate 13. The first support base 11, the second support base 12, and the side surfaces of the slot fixing plate 13 are all configured to be installed on the connection holes of the test cabin. The installation on both sides ensures sufficient strength and is easy to disassemble. The middle part of the slot fixing plate 13 has a plug-in notch 131. The first support base 11, the second support base 12, and the slot fixing plate 13 are provided with tapped holes for installing the shrapnel copper busbar assembly 2.

[0049] The first support base 11 and the second support base 12 are made of aluminum alloy and are used to fix the entire structural frame. They are also fixed plates installed on the equipment, and the hole positions can be adapted according to the specific test chamber. The slot fixing plate 13 is an epoxy resin plate, which plays the role of insulation and improving pressure resistance. The plug-in slot 131 plays a certain guiding role.

[0050] like Figure 2 , Figure 3 As shown, the fixing frame 3 includes a first fixing member 31 and a second fixing plate 32. The first fixing member 31 includes two square plates and two triangular plates. The two square plates are connected at a right angle of 90 degrees, and the two triangular plates are connected at the side, so that the first fixing member 31 is an angular structure. The back of the first fixing member 31 is connected to the side of the first support base 11 in the support base assembly 1 by bolts. Figure 6 , Figure 8 It can be seen that the bottom surface of the first fixing member 31 is connected to the second fixing plate 32 by bolts, and the second fixing plate 32 is a square block structure with a certain thickness. The side and bottom surfaces of the first fixing member 31 are respectively provided with waist-shaped holes, and the first fixing member 31 is connected to the first support base 11 of the support base assembly 1 by bolts passing through the waist-shaped holes, and the bottom surface of the first fixing member 31 is connected to the first copper busbar 21 and / or the second copper busbar 22 by bolts passing through the waist-shaped holes.

[0051] The first fixing member 31 is made of sheet metal, plays a role of fixing and supporting, and is the installation basis of the core component of the interface. The second fixing plate 32 is an epoxy resin plate, and plays a role of transition structure.

[0052] Here, the first copper busbar 21 located at the top is connected to the second fixing plate 32 located at the top, and the second copper busbar 22 located at the bottom is connected to the second fixing plate 32 located at the bottom.

[0053] In this embodiment, there are four fixing frames 3, and the fixing frames 3 are symmetrically arranged up and down along the horizontal symmetry plane of the first copper bar 21 and the second copper bar 22. The fixing frames 3 are evenly arranged in two rows along the horizontal direction.

[0054] like Figure 4 As shown, one end of the first spring piece 23 is bent, and after being bent, it fits with the left small corner of the first copper bar 21. The first spring piece 23 is connected to the end face of the first copper bar 21 by bolts, and the other end of the first spring piece 23 protrudes toward the second spring piece 24; one end of the second spring piece 24 is bent, and after being bent, it fits with the upper left corner of the second copper bar 22, and is connected to the end of the second copper bar 22 by bolts, and the other end of the second spring piece 24 protrudes toward the first spring piece 23. There is a gap between the first copper bar 21 and the second copper bar 22, and one end of the first spring piece 23 and the second spring piece 24 that are bent is located in the gap, forming an "eight" shape at the left opening end and the right exit end.

[0055] The detachable structure in which the shrapnel and the copper bar are connected by bolts facilitates the regular replacement of the beryllium copper shrapnel.

[0056] The first copper bar 21 and the second copper bar 22 are made of copper and are used to fix the spring sheet. The gap between the first copper bar 21 and the second copper bar 22 is used to limit the spring sheet.

[0057] The first spring piece 23 and the second spring piece 24 are both formed by stacking multiple spring pieces. The first spring piece 23 and the second spring piece 24 can be stacked and used according to the thickness of the electrodes to be inserted, which increases the test types and also increases the elasticity of the first spring piece 23 and the second spring piece 24. The material of the first spring piece 23 and the second spring piece 24 is beryllium copper, which is a standard part that has been molded and has a large level contact elasticity. In this way, the PCB at the end of the test equipment is pushed in, and the PCB is attached with copper foil, which can contact the beryllium copper springs installed above and below, and then conduct.

[0058] In this embodiment, the length of the first spring piece 23 and the second spring piece 24 can be set very short, and the beryllium copper material used by the first spring piece 23 and the second spring piece 24 has a high conductivity, so the stray inductance of the interface can be controlled within a certain range, which can ensure that the voltage of 8-10KV passes through the interface, the contact is good, and the spark phenomenon is avoided.

[0059] Combination Fig.10 As shown, the support base assembly 1 is provided with avoidance slots 14 at the connection between the first spring piece 23 and the first copper bar 21 and at the connection between the second spring piece 24 and the second copper bar 22 .

[0060] When this embodiment is used, the PCB at the test equipment end is inserted from the plug-in slot 131. The PCB is attached with copper foil, which can contact the first spring piece 23 and the second spring piece 24 installed above and below, and then conduct; the first copper bar 21 and the second copper bar 22 can fix the first spring piece 23 and the second spring piece 24. The gap between the first spring piece 23 and the second spring piece 24 is used for limiting. The first spring piece 23 and the second spring piece 24 are relatively curved, and the area of ​​elastic contact, the PCB at the fixture end or other types of electrodes are directly inserted to achieve contact and conduction. The utility model makes the insertion of the interface smoother and easier to plug in through the initial limiting of the plug-in slot 131 and the elastic contact.

[0061] Embodiment 2:

[0062] like Fig.10 As shown, combined Figure 6 , Figure 7 As shown, in this embodiment, based on the first embodiment, the low-inductance and high-voltage-resistant interface further includes a copper busbar support 4 .

[0063] The vertical interface of the copper bar support 4 is a horizontal T-shaped structure. The copper bar support 4 is connected to the end of the first copper bar 21 and the second copper bar 22 away from the support base assembly 1. One side of the copper bar support 4 has a cantilever, and a limiting groove is provided at one end of the cantilever toward the first spring piece 23 and the second spring piece 24. Figure 6 As shown by the arrows, an insertion channel is formed between the insertion slot 131 , the first elastic sheet 23 , the second elastic sheet 24 , and the limiting slots.

[0064] The top surface and the bottom surface of the copper bar support 4 are connected to the first copper bar 21 and the second copper bar 22 respectively through bolts or screws.

[0065] The copper bar support 4 is made of epoxy resin material. On the one hand, the copper bar support 4 can support the upper and lower first copper bars 21 and second copper bars 22. On the other hand, the copper bar support 4 has limiting slots. The limiting slots are the limiting positions for the inserted PCB, which play a certain guiding and limiting role, improve stability, and also provide support for the installation of devices behind the interface.

[0066] In this embodiment, the low-inductance high-voltage resistant interface also includes an epoxy fixing part 5, which is in a rectangular ring shape, and has screw holes on the upper and lower surfaces of the epoxy fixing part 5. The epoxy fixing part 5 is sleeved on the outside of the first copper bus 21 and the second copper bus 22 and connected to them by screws.

[0067] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. Low-inductive and high-voltage resistant interface, characterized in that: It includes a supporting base assembly, a shrapnel copper bar assembly, and a fixing frame; A plug-in slot is provided in the middle of the support base assembly; The spring-type copper bar assembly comprises a symmetrically arranged first copper bar, a second copper bar and a symmetrically arranged first spring type and second spring type; the first copper bar and the second copper bar are connected to the supporting base assembly via a fixing frame, the first spring type and the second spring type are respectively connected to the first copper bar and the second copper bar and are located between the two, the first spring type and the second spring type are relatively bent, and the gap between the first spring type and the second spring type is aligned with the position of the plug-in slot.

2. The low-inductance and high-voltage resistant interface according to claim 1, characterized in that: The fixing frame includes a first fixing member and a second fixing plate. The first fixing member is an angular structure. The side of the first fixing member is connected to the side of the supporting base assembly. The bottom of the first fixing member is connected to the second fixing plate. The first copper busbar is connected to the second fixing plate.

3. The low-inductance and high-voltage resistant interface according to claim 2, characterized in that: There are multiple fixing frames, and the fixing frames are symmetrically arranged along the horizontal symmetry plane between the first copper bar and the second copper bar.

4. The low-inductance and high-voltage resistant interface according to claim 2, characterized in that: The side and bottom surfaces of the first fixing member are respectively provided with waist-shaped holes, and the first fixing member is connected to the supporting base assembly by bolts passing through the waist-shaped holes, and the bottom surface of the first fixing member is connected to the first copper busbar and / or the second copper busbar by bolts passing through the waist-shaped holes.

5. The low-inductance and high-voltage resistant interface according to claim 1, characterized in that: One end of the first spring sheet is bent and connected to the end of the first copper bar by bolts after bending, and the other end of the first spring sheet protrudes toward the second spring sheet; one end of the second spring sheet is bent and connected to the end of the second copper bar by bolts after bending, and the other end of the second spring sheet protrudes toward the first spring sheet.

6. The low-inductance and high-voltage resistant interface according to claim 1, characterized in that: The support base assembly is provided with avoidance slots at the connection between the first spring sheet and the first copper bar and at the connection between the second spring sheet and the second copper bar.

7. The low-inductance and high-voltage resistant interface according to claim 1, characterized in that: The first spring piece and the second spring piece are both formed by stacking a plurality of spring pieces.

8. The low-inductance and high-voltage resistant interface according to claim 1, characterized in that: It also includes a copper bar support, which is connected to the first copper bar and the second copper bar at one end away from the support base assembly. One side of the copper bar support has a cantilever, and a limiting slot is opened at one end of the cantilever facing the first spring sheet and the second spring sheet. A plug-in channel is formed between the plug-in slot and the first spring sheet, the second spring sheet and the limiting slot.

9. The low-inductance and high-voltage resistant interface according to claim 1, characterized in that: It also includes an epoxy fixing piece, which is ring-shaped and sleeved on the outside of the first copper bar and the second copper bar and connected thereto.

10. The low-inductance and high-voltage resistant interface according to claim 1, characterized in that: The support base assembly includes a first support base, a second support base, and a slot fixing plate. The first support base and the second support base are located at the upper and lower parts of the slot fixing plate. The first support base, the second support base, and the side surfaces of the slot fixing plate are all configured to be installed on the connecting holes of the test cabin, and the middle part of the slot fixing plate is plugged into a slot.

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