Sampling inspection jig for preventing man-made wire collapse
By designing a sampling fixture composed of a tray and a sliding cover, the problem of manual detection of the bonding line arc is easily caused by accidental touch, resulting in product wire collapse, and effectively preventing false touch and improving the safety of sampling.
Patent Information
- Application Number
- CN202420575858.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-22
- Publication Date
- 2025-04-11
- Estimated Expiration
- 2034-03-22
AI Technical Summary
During the random inspection, manual detection of bonded wire arcs can easily lead to accidental contact and cause product wire collapse.
A sampling tool consisting of a tray and a sliding cover is designed. The sliding cover is installed above the accommodating groove and can slide in the front and rear directions. The sampling personnel place their thumbs through the lower surface of the tray and place the remaining four fingers on the sliding cover to effectively prevent human hands from touching the line arc when they reach into the accommodating groove.
Effectively prevent artificially accidentally touching the wire arc on the product, avoid causing product wire collapse, and improve the reliability and safety of the sampling process.
Smart Images
Figure CN222748507U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of jigs, in particular to a sampling jig for preventing artificial wire collapse. Background Art
[0002] Lead frame is the chip carrier of integrated circuit. It is a key structural component that uses bonding wires (metal wires) to realize the electrical connection between the lead end of the chip's internal circuit and the external lead to form an electrical circuit. During production, the chip is first mounted on the surface of the base island on the lead frame, and then the chip is welded to the pins on the lead frame through bonding wires. After the product completes the wire bonding process, it is necessary to observe through a microscope whether the height of the bonding wire arc on the lead frame, the spacing between adjacent bonding wires and other indicators meet the standards to monitor the quality of the bonding wire.
[0003] At present, the detection of bonding wire arcs is generally completed manually. The inspection personnel hold the tray and put the product into the receiving groove on the tray, and then move it under the microscope for observation and inspection. The traditional tray mainly includes a base plate and three surrounding plates connected in sequence. The base plate and the three surrounding plates form a receiving groove, and the lead frame can be placed in the receiving groove. However, due to the unreasonable setting of such a tray structure, it is easy for people to accidentally touch the wire arc on the product during the inspection process, causing the product to collapse. Utility Model Content
[0004] The utility model aims at the defects of the prior art and provides a sampling inspection jig for preventing artificial wire breakage, which can prevent artificial wire breakage caused by accidental touching of the wire arc on the product and avoid causing the wire breakage of the product.
[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:
[0006] A sampling jig for preventing artificial wire collapse comprises a tray, the upper surface of which is concavely provided with a receiving groove, the receiving groove extending in the front-to-back direction, the front end surface of the tray is provided with an opening for a lead frame to extend into the receiving groove, and a sliding cover is also provided, the sliding cover is provided above the receiving groove, and the sliding cover can be slidably provided on the tray in the front-to-back direction.
[0007] By setting up a sampling jig composed of a tray and a sliding cover, the sliding cover is arranged above the accommodating groove, and the sliding cover can be slid on the tray in the front-rear direction. During the sampling inspection, the sampling inspector places the thumb on the lower surface of the tray and the other four fingers on the sliding cover. In the process of putting the lead frame into or out of the accommodating groove and in the process of observing the wire arc on the lead frame, it can effectively prevent people from reaching into the accommodating groove and accidentally touching the wire arc on the lead frame. When it is necessary to observe the welding wire condition of the chip in the obstructed position, the sliding cover is moved to other positions to facilitate the observation of the blind area, so that the sampling jig can prevent people from accidentally touching the wire arc on the product and avoid causing product wire collapse.
[0008] As a preferred solution, a first guide portion is provided on at least one side of the sliding cover, and a second guide portion is provided on at least one side of the tray. The first guide portion is slidably connected to the third guide portion so that the sliding cover can slide back and forth relative to the tray.
[0009] As a preferred solution, the first guide parts are disposed on both left and right sides of the sliding cover, the second guide parts are disposed on both left and right sides of the tray, and the accommodating groove is disposed between the two second guide parts.
[0010] As a preferred solution, both left and right sides of the sliding cover are provided with connecting plates extending downwards, and the first guide portion is arranged on the connecting plates.
[0011] As a preferred solution, the first guide portion is a guide rail, the second guide portion is a guide groove, and the guide rail and the guide groove both extend in the front-rear direction.
[0012] As a preferred solution, a notch is provided at the rear end of the guide groove, and an inclined surface is provided on the inner side wall of the notch close to the accommodating groove, and the inclined surface extends from the front to the back toward the accommodating groove.
[0013] As a preferred solution, the length of the sliding cover along the front-to-back direction is less than the length of the accommodating groove along the front-to-back direction, and the length of the sliding cover along the front-to-back direction is 70 mm-90 mm.
[0014] As a preferred solution, both left and right sides of the upper end of the tray are provided with convex edges, the convex edges extend in the front-to-back direction, and the width of the convex edges along the left-to-right direction is 13mm-17mm.
[0015] As a preferred embodiment, the convex edge portion extends into the accommodating groove, a slot is formed between the lower surface of the convex edge and the inner bottom wall of the accommodating groove, the slot is connected to the opening, a step is provided in the slot, a positioning groove is formed between the step and the convex edge, and the height of the positioning groove is adapted to the thickness of the lead frame.
[0016] As a preferred solution, the front end surface of the tray is further provided with a positioning boss, and the positioning boss is arranged below the opening.
[0017] Compared with the prior art, the utility model has obvious advantages and beneficial effects. Specifically, by providing a sampling jig composed of a tray and a sliding cover, the sliding cover is arranged above the accommodating groove, and the sliding cover can be slid on the tray in the front-rear direction. During the sampling inspection, the sampling inspector places his thumb on the lower surface of the tray and the other four fingers on the sliding cover. In the process of putting the lead frame into or out of the accommodating groove and in the process of observing the wire arc on the lead frame, it can effectively prevent the hand from reaching into the accommodating groove and accidentally touching the wire arc on the lead frame. When it is necessary to observe the welding wire condition of the chip in the blocked position, the sliding cover is moved to other positions to facilitate the observation of the blind area, so that the sampling jig can prevent people from accidentally touching the wire arc on the product and avoid causing product wire collapse.
[0018] In order to more clearly explain the structural features, technical means and specific purposes and functions achieved by the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments: BRIEF DESCRIPTION OF THE DRAWINGS
[0019] Figure 1 This is a schematic diagram of the assembly structure of an embodiment of the utility model from a first perspective;
[0020] Figure 2 This is a schematic diagram of the assembly structure of the embodiment of the utility model from a second viewing angle;
[0021] Figure 3 It is a top view of an embodiment of the utility model;
[0022] Figure 4 yes Figure 3 Schematic diagram of the cross section of AA;
[0023] Figure 5 It is a schematic diagram of the use status of an embodiment of the utility model.
[0024] Description of the accompanying drawings:
[0025] 10-tray 101-positioning boss 11-accommodating groove
[0026] 111- opening 12- second guide portion 13- notch
[0027] 131- inclined surface 14- blocking portion 15- convex edge
[0028] 16-slot 17-step 18-positioning slot
[0029] 19- second through hole 20- sliding cover 21- first guide part
[0030] 22-connection plate 23-first through hole 30-lead frame DETAILED DESCRIPTION
[0031] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the position or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention.
[0032] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.
[0033] like Figure 1-5 As shown, the utility model discloses a sampling jig for preventing artificially caused wire collapse, including a tray 10 and a sliding cover 20, the upper surface of the tray 10 is concavely provided with a receiving groove 11, the receiving groove 11 extends in the front-to-back direction, the front end surface of the tray 10 is provided with an opening 111 for the lead frame 30 to extend into the receiving groove 11, the opening 111 is a trumpet-shaped opening 111, the width of the trumpet-shaped opening 111 gradually decreases from front to back, the sliding cover 20 is covered above the receiving groove 11, and the sliding cover 20 can be slidably arranged on the tray 10 in the front-to-back direction, specifically, the sliding cover 20 is formed of metal material, preferably the sliding cover 20 is formed of stainless steel material, the thickness of the sliding cover 20 is 0.8mm-1.2mm, preferably the thickness of the sliding cover 20 is 1.0mm.
[0034] The sliding cover 20 is provided with a first guide portion 21 on at least one side, and the tray 10 is provided with a second guide portion 12 on at least one side. The first guide portion 21 is slidably connected to the third guide portion in a front-to-back manner so that the sliding cover 20 can slide back and forth relative to the tray 10. The sliding cover 20 is formed by providing the first guide portion 21 on the sliding cover 20, and providing the second guide portion 12 on the tray 10, and utilizing the first guide portion 21 to be slidably connected to the third guide portion in a front-to-back manner, so that the sliding cover 20 can slide back and forth relative to the tray 10, and then the position of the sliding cover 20 can be adjusted to facilitate observation of blind spots.
[0035] The first guide parts 21 are provided on the left and right sides of the sliding cover 20, the second guide parts 12 are provided on the left and right sides of the tray 10, and the accommodating groove 11 is provided between the two second guide parts 12; by providing the first guide parts 21 on the left and right sides of the pot cover, and providing the second guide parts 12 on the left and right sides of the tray 10, there are two sets of sliding connection structures between the sliding cover 20 and the tray 10, so that the sliding cover 20 can slide relative to the tray 10 more stably and smoothly.
[0036] The left and right sides of the sliding cover 20 are both provided with connecting plates 22 extending downward, and the first guide portion 21 is arranged on the connecting plates 22; by arranging the connecting plates 22 extending downward on the left and right sides of the sliding cover 20, the first guide portion 21 is arranged on the connecting plates 22, so that there is a certain distance between the first guide portion 21 and the sliding cover 20, and there is enough space for the first guide portion 21 during processing and forming, which facilitates the processing and forming of the first guide portion 21.
[0037] The first guide portion 21 is arranged on the side of the connecting plate 22 facing the tray 10, and the left wall and the right wall of the tray 10 are both provided with the second guide portion 12. It can be understood that the first guide portion 21 can also be arranged at the lower end of the connecting plate 22, and correspondingly, the second guide portion 12 can be arranged on the upper surface of the tray 10.
[0038] The first guide portion 21 is a guide rail, and the second guide portion 12 is a guide groove, and both the guide rail and the guide groove extend in the front-to-back direction. It can be understood that the first guide portion 21 can also be a guide groove, and accordingly, the second guide portion 12 is set as a guide rail; by adopting the guide rail and the guide groove, the matching structure of the guide rail and the guide groove is simple, easy to process, low in cost, and good in reliability.
[0039] A notch 13 is provided at the rear end of the guide groove, and a slope 131 is provided on the inner side wall of the notch 13 close to the accommodating groove 11, and the slope 131 extends from front to back toward the accommodating groove 11, and the front end of the slope 131 extends to the corresponding guide groove, and the rear end of the slope 131 extends to the rear end surface of the tray 10, and the upper end of the slope 131 extends to the upper surface of the tray 10, and a blocking portion 14 is provided at the front end of the guide groove, and the cooperation between the blocking portion 14 and the first guide portion 21 can limit the sliding cover 20 from escaping forward from the tray 10; by providing a notch 13 at the rear end of the guide groove, and providing a slope 131 on the inner side wall of the notch 13 close to the accommodating groove 11, and extending from front to back toward the accommodating groove 11, it is convenient to load the first guide portion 21 from the notch 13 and guide it to the guide groove during assembly, and the assembly is convenient and quick.
[0040] The length a1 of the sliding cover 20 along the front-to-back direction is less than the length a2 of the accommodating groove 11 along the front-to-back direction. The length a1 of the sliding cover 20 along the front-to-back direction is 70mm-90mm. Preferably, the length a1 of the sliding cover 20 along the front-to-back direction is 80mm. The width b1 of the sliding cover 20 along the left-to-right direction is greater than the width b2 of the accommodating groove 11 along the left-to-right direction. By adopting the sliding cover 20 with a length a1 of 70mm-90mm, the length a1 of the sliding cover 20 is adapted to the width of four fingers of an adult, which is ergonomic and can better prevent the fingers of the inspectors from being inserted into the accommodating groove 11 to cause wire collapse during the random inspection process, thereby improving the reliability and safety of the random inspection process.
[0041] The left and right sides of the upper end of the tray 10 are provided with flanges 15, and the sliding cover 20 is provided above the flange 15. The flange 15 extends in the front-to-back direction, and the width c of the flange 15 along the left-to-right direction is 13mm-17mm. Preferably, the width c of the flange 15 along the left-to-right direction is 15mm. By providing flanges 15 with a width c of 13mm-17mm at the left and right ends of the tray 10, the thickness of the left and right sides of the tray 10 is increased, and the overall width of the tray 10 along the left-to-right direction is adapted to the length of an adult's palm, so that the sampling personnel are not likely to accidentally touch the wire arc on the lead frame 30 in the accommodating groove 11, thereby avoiding wire collapse.
[0042] The flange 15 partially extends into the accommodating groove 11, and a slot 16 is formed between the lower surface of the flange 15 and the inner bottom wall of the accommodating groove 11. The slot 16 is connected to the opening 111. A step 17 is provided in the slot 16, and a positioning groove 18 is formed between the step 17 and the flange 15. The height of the positioning groove 18 is adapted to the thickness of the lead frame 30. Specifically, the step 17 extends in the front-to-back direction. When in use, the left and right sides of the lead frame 30 are pushed into the positioning groove 18 from the opening 111.
[0043] The sliding cover 20 is provided with a plurality of first through holes 23, and the first through holes 23 penetrate the upper and lower surfaces of the sliding cover 20. The inner bottom wall of the accommodating groove 11 is provided with a plurality of second through holes 19, and the second through holes 19 penetrate the lower surface of the tray 10. By providing the first through holes 23 and the second through holes 19, the material of the sliding cover 20 and the tray 10 is reduced, thereby reducing the material cost and weight.
[0044] The front end surface of the tray 10 is also provided with a positioning boss 101, and the positioning boss 101 is provided below the opening 111. The positioning boss 101 is flat and extends in the left-right direction. By providing the positioning boss 101, when the lead frame 30 needs to be put back into the material slot at the original location of the material box after the random inspection is completed, it is only necessary to align the positioning boss 101 with the next layer of the material slot where the material box needs to be put back. At this time, the lead frame 30 in the positioning slot 18 is just aligned with the original material slot, and the lead frame 30 can be pushed from the tray 10 to the original material slot, so that it is convenient to put the frame back to the layer you want to put it back.
[0045] The use of the utility model:
[0046] 1. The inspection personnel place the thumb on the lower surface of the tray 10 and the other four fingers on the slide cover 20, move the tray 10 to the material box, and use tweezers to drag the bonded lead frame 30 from the pulling hole on the material box and extend it from the opening 111 into the receiving groove 11. At this time, the left and right sides of the lead frame 30 are respectively inserted into the corresponding positioning grooves 18, so that the left and right sides of the lead frame 30 are supported on the corresponding steps 17;
[0047] 2. When it is necessary to observe the bonding wire of the chip in the blocked position during the random inspection, the sliding cover 20 can be moved to other positions along the front-back direction by hand to facilitate the observation of the blind area;
[0048] 3. After the observation is completed, the positioning boss 101 on the tray 10 is placed on the lower layer of the original frame position on the material box, and then the lead frame 30 that has been sampled is dragged and put back into the material box with tweezers.
[0049] In summary, the utility model provides a sampling jig composed of a tray 10 and a sliding cover 20, wherein the sliding cover 20 is covered on the top of the receiving groove 11, and the sliding cover 20 can be slid on the tray 10 in the front-rear direction. During the sampling inspection, the sampling inspector places his thumb on the lower surface of the tray 10 and the other four fingers on the sliding cover 20. In the process of placing the lead frame 30 into or removing the receiving groove 11 and in the process of observing the wire arc on the lead frame 30, it can effectively prevent the hand from reaching into the receiving groove 11 and accidentally touching the wire arc on the lead frame 30. When it is necessary to observe the welding wire condition of the chip in the obstructed position, the sliding cover 20 is moved to other positions to facilitate the observation of the blind spot, so that the sampling jig can prevent people from accidentally touching the wire arc on the product and avoid causing product wire collapse.
[0050] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Therefore, any modification, equivalent replacement, improvement, etc. made to the above embodiment based on the technical practice of the present invention still falls within the scope of the technical solution of the present invention.
Claims
1. A sampling jig for preventing artificial wire collapse, comprising a tray, a receiving groove is concavely provided on the upper surface of the tray, the receiving groove extends in the front-to-back direction, and an opening is provided on the front end surface of the tray for a lead frame to extend into the receiving groove, characterized in that: The utility model also comprises a sliding cover, which is arranged above the containing groove and can be slidably arranged on the tray along the front-back direction.
2. The sampling jig for preventing artificial wire collapse according to claim 1 is characterized in that: A first guide portion is disposed on at least one side of the sliding cover, and a second guide portion is disposed on at least one side of the tray. The first guide portion is slidably connected to the third guide portion forward and backward so that the sliding cover can slide forward and backward relative to the tray.
3. The sampling jig for preventing artificial wire collapse according to claim 2 is characterized in that: The first guide parts are disposed on both left and right sides of the sliding cover, the second guide parts are disposed on both left and right sides of the tray, and the accommodating groove is disposed between the two second guide parts.
4. The sampling jig for preventing artificial wire collapse according to claim 3 is characterized in that: The left and right sides of the sliding cover are both provided with connecting plates extending downwards, and the first guide part is arranged on the connecting plates.
5. The sampling jig for preventing artificial wire collapse according to claim 2 is characterized in that: The first guide portion is a guide rail, and the second guide portion is a guide groove. Both the guide rail and the guide groove extend in the front-rear direction.
6. The sampling jig for preventing artificial wire collapse according to claim 5 is characterized in that: A notch is provided at the rear end of the guide groove, and an inclined surface is provided on the inner side wall of the notch close to the accommodating groove, and the inclined surface extends from the front to the back towards the accommodating groove.
7. The sampling jig for preventing artificial wire collapse according to claim 1 is characterized in that: The length of the sliding cover along the front-to-back direction is less than the length of the accommodating groove along the front-to-back direction, and the length of the sliding cover along the front-to-back direction is 70 mm-90 mm.
8. The sampling jig for preventing artificial wire collapse according to claim 1 is characterized in that: The left and right sides of the upper end of the tray are both provided with convex edges, and the convex edges extend in the front-to-back direction, and the width of the convex edges along the left-to-right direction is 13mm-17mm.
9. The sampling jig for preventing artificial wire collapse according to claim 8 is characterized in that: The convex edge portion extends into the accommodating groove, a slot is formed between the lower surface of the convex edge and the inner bottom wall of the accommodating groove, the slot is connected to the opening, a step is provided in the slot, a positioning groove is formed between the step and the convex edge, and the height of the positioning groove is adapted to the thickness of the lead frame.
10. The sampling jig for preventing artificially caused wire collapse according to any one of claims 1 to 9, characterized in that: The front end surface of the tray is also provided with a positioning boss, and the positioning boss is arranged below the opening.