Material box
The semi-metallic carrier box with engineered plastic inserts addresses debris issues in semiconductor packaging, extending lifespan and preventing wire shorts through improved mechanical and thermal stability, with easy insert replacement.
Patent Information
- Application Number
- CN202422013252.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-19
- Publication Date
- 2025-07-15
- Estimated Expiration
- 2034-08-19
AI Technical Summary
When the existing material box is transported by the metal frame, the plating layer on the inner wall of the metal groove is severely detached, resulting in short-connection of bond lines, affecting the quality of semiconductor packaging, and frequent friction leads to a shortening of the service life of the material box.
The slot strip made of special engineering plastic is embedded in the slot on the side of the box to limit the metal frame. The slot strip has high strength, stiffness and wear resistance to prevent metal chips from being generated and maintains hardness in a high temperature environment. When wear is severe, the slot strip can be replaced without changing the entire box.
It improves the service life of the material box, prevents short-connection of bond wires caused by metal chips, extends the service cycle of the material box, simplifies the maintenance process, and reduces the frequency of replacing new material boxes.
Smart Images
Figure CN223108861U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of semiconductor packaging, and particularly to a cassette for storing and transporting metal frames. Background Art
[0002] As a part of semiconductor packaging, a metal frame is used to support packaged chips in semiconductor packaging and to connect the packaged chips with external devices.
[0003] In the packaging process, the metal frame is usually transported by a cassette (such as the transportation from the chip mounting process to the cutting process, or the transportation from the wire bonding process to the plastic encapsulation process). Currently, the commonly used cassettes on the market are all made of all-metal materials. Metal frames are placed in the metal grooves inside the cassette. During the process, the metal frames are frequently pushed into or pulled out of the metal grooves of the cassette, and there is frequent friction with the cassette. Metal chips will be generated on the inner surface of the cassette. Over time, the surface coating on the inner wall of the metal groove will fall off seriously, and a new cassette needs to be replaced. Moreover, the metal chips generated by frequent friction will fall on the lower frame. For example, in the bonding process, if the metal debris falls on two adjacent bonding wires, it is very easy to cause short circuit between the two adjacent bonding wires, resulting in quality problems. Summary of the Utility Model
[0004] The technical problem to be solved by this application is to provide a cassette to improve the service life of the cassette and prevent short circuit of the bonding wires caused by friction-generated metal chips.
[0005] To solve the above problems, this application provides a cassette, including:
[0006] A metal box body, the metal box body includes opposite top and bottom, and two opposite side parts located between the top and the bottom, and the side parts include opposite inner side walls and outer side walls;
[0007] A number of parallel slots located in the inner side walls of the side parts;
[0008] Slot strips embedded in the slots, and the material of the slot strips is special engineering plastic. The slot strips include opposite first side surfaces and second side surfaces, and upper and lower surfaces located between the first side surface and the second side surface. The second side surface and the upper and lower surfaces are in contact with the slots. The first side surface has an inward concave groove, and the groove is used to limit the edge of the metal frame when the metal frame is placed.
[0009] In some embodiments, the size of the opening of the slot is smaller than the size of the bottom of the slot.
[0010] In some embodiments, the size of the slot gradually decreases from the opening of the slot to the bottom of the slot.
[0011] In some embodiments, the shape of the surface of the slot bar corresponds to the shape of the inner sidewall of the slot.
[0012] In some embodiments, a plurality of discrete openings penetrating the inner sidewall and the outer sidewall are provided in the side portion, and the openings communicate with the corresponding slots.
[0013] In some embodiments, at least two of the openings communicate with a corresponding one of the slots.
[0014] In some embodiments, the second side surface of the slot bar has protrusions, and the protrusions are stuck in the corresponding openings.
[0015] In some embodiments, the number of protrusions on the second side surface of the slot bar is equal to the number of openings communicating with the corresponding slot, and the second side surface of the slot bar has at least two discrete protrusions.
[0016] In some embodiments, an outer frame groove is provided in the outer sidewall of the side portion of the metal box body, and the openings communicate with the outer frame groove.
[0017] In some embodiments, the material of the special engineering plastic is polyphenylene sulfide, polyimide, polyether ether ketone, polyarylate, liquid crystal polymer or polysulfone.
[0018] The technical solution of the present application has the following advantages:
[0019] The cartridge in some of the foregoing embodiments of the present application includes: a metal cartridge body, the metal cartridge body including opposite top and bottom portions, and two opposite side portions located between the top and bottom portions, the side portions including opposite inner side walls and outer side walls; a plurality of parallel card slots provided in the inner side walls of the side portions; a card slot strip embedded in the card slots, and the material of the card slot strip is a special engineering plastic, the card slot strip including opposite first side surfaces and second side surfaces, and upper and lower surfaces located between the first side surface and the second side surface, the second side surface and the upper and lower surfaces being in contact with the card slots, the first side surface having a concave groove for limiting the edge of the metal frame when the metal frame is placed. By embedding the card slot strip in the card slots on the side portions of the metal cartridge body, when the metal frame is placed in the cartridge, the two opposite edges of the metal frame are respectively limited in the grooves of the corresponding card slot strips on the two opposite side portions. Since the material of the card slot strip is a special engineering plastic, the special engineering plastic card slot strip has: excellent mechanical properties, with high strength, stiffness and wear resistance characteristics, and is not prone to generating debris during frequent friction with the metal frame; excellent high-temperature stability. There are high-temperature processes in the semiconductor packaging process, and this special engineering plastic can still maintain good hardness and stiffness in a high-temperature environment; excellent electrical insulating material. During the bonding process, when the metal frame and this special engineering plastic rub against each other, the dropped debris will not cause short-circuiting of adjacent two bonding wires. And when the card slot strip is severely worn, the severely worn card slot strip can be removed and a new card slot strip can be replaced, and the cartridge can continue to be used without replacing the cartridge, which improves the service life of the cartridge. At the same time, replacing the card slot strip is very convenient and fast, saving the long delivery time of a new cartridge. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] Figures 1-2 is a schematic structural diagram of a cartridge in some embodiments of the present application;
[0021] Figure 3 The left figure in Figure 1 or Figure 2 is a front view structural diagram of the cartridge shown without the card slot strip installed;
[0022] Figure 3 The right figure in Figure 1 or Figure 2 is a front view structural diagram of the cartridge shown with the card slot strip installed;
[0023] Figure 4 is Figure 2 a schematic cross-sectional structural diagram of the cartridge shown along the cutting line AB direction. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0024] To make the above objects, features, and advantages of the present application more apparent and understandable, the following provides a detailed description of the specific embodiments of the present application with reference to the accompanying drawings. When detailing the embodiments of the present application, for ease of illustration, the schematic diagrams will be enlarged locally in a non-general proportion, and the schematic diagrams are only examples and should not limit the protection scope of the present application herein. In addition, in actual production, three-dimensional spatial dimensions including length, width, and depth should be included.
[0025] Some embodiments of the present application provide a cartridge, with reference to Figures 1-3 , including:
[0026] A metal box body 100, the metal box body 100 includes opposite top 101 and bottom 102, and two opposite side portions 103 located between the top 101 and the bottom 102, and the side portion 103 includes opposite inner sidewalls and outer sidewalls;
[0027] A number of parallel slots 105 provided in the inner sidewall of the side portion 103 (refer to Figure 3 );
[0028] A slot strip 104 embedded in the slot 105, and the material of the slot strip 104 is a special engineering plastic. The slot strip 104 includes opposite first side surface and second side surface, and upper and lower two surfaces located between the first side surface and the second side surface. The second side surface and the upper and lower two surfaces are in contact with the slot 105, and the first side surface has an inward concave groove 104a (refer to Figure 3 ), and the groove 104a is used to limit the edge of the metal frame when placing the metal frame.
[0029] The metal box body 100 is in the shape of a cuboid. In a specific embodiment, the metal box body 100 includes opposite top 101 and bottom 102, and two opposite side portions 103 located between the top 101 and the bottom 102. The space surrounded by the top 101, the bottom 102, and the side portion 103 is a receiving cavity for receiving the metal frame. In some embodiments, the front and back surfaces of the metal box body 100 ( Figure 1 the two surfaces perpendicular to the y-axis direction in
[0030] are hollow, and the hollow front surface or the front and back surfaces of the metal box body 100 are used as the cartridge opening for placing and removing the metal frame.
[0031] The side portion 103 includes opposite inner sidewalls and outer sidewalls, and there are a number of parallel slots 105 provided in the inner sidewall of the side portion 103 (refer to Figure 3) The card slot 105 is for embedding or installing the card slot strip 104. The material of the card slot strip 104 is special engineering plastic. The card slot strip 104 includes opposite first and second side surfaces, and two upper and lower surfaces located between the first and second side surfaces. The second side surface and the two upper and lower surfaces are in contact with the card slot 105. The first side surface has a concave groove 104a (refer to Figure 3 ). The groove 104a is used to limit the edge of the metal frame when the metal frame is placed. By embedding the card slot strip 104 in the card slot 105 on the side part 103 of the metal box body 100, when the metal frame is placed in the cartridge, the two opposite edges of the metal frame are respectively limited in the grooves 104a of the corresponding card slot strips 104 on the two opposite side parts 103 (refer to Figure 3 ). Since the material of the card slot strip 104 is special engineering plastic, the card slot strip 104 made of this special engineering plastic has: excellent mechanical properties, with high strength, stiffness and wear resistance characteristics, and is not easy to generate debris during frequent friction with the metal frame; excellent high-temperature stability. There are high-temperature processes in the semiconductor packaging process, and this special engineering plastic can still maintain good hardness and stiffness in a high-temperature environment; excellent electrical insulation material. During the bonding process, when the metal frame and this special engineering plastic rub against each other, the dropped debris will not cause a short circuit between two adjacent bonding wires. And when the card slot strip 104 is severely worn, the severely worn card slot strip can be removed and a new card slot strip can be quickly replaced, and the cartridge can continue to be used without replacing the new cartridge, which improves the service life of the cartridge. At the same time, replacing the card slot strip 104 is very convenient and fast, saving the long delivery time of the new cartridge.
[0032] Both of the inner side walls of the two opposite side parts 103 have a plurality of card slots 105 arranged in parallel (refer to Figure 3 ), and the card slots 105 in one side part 103 and the card slots 105 in the other side part 103 are arranged corresponding and parallel to each other. Both ends of the card slot 105 also penetrate through the front and rear two surfaces of the side wall 103 ( Figure 1 two surfaces perpendicular to the y-axis direction in ).
[0033] In some embodiments, continuing to refer to Figure 3 , the size of the opening of the card slot 105 is smaller than the size of the bottom of the card slot 105. The shape of the card slot strip 104 corresponds to the shape of the inner side wall of the card slot 105. When the card slot strip 104 is embedded or installed in the card slot 105, it can prevent the card slot strip 104 from moving in the vertical direction ( Figure 1 the z-axis direction in ) and towards the inside of the cartridge, improving the firmness of the card slot strip 104 embedded or installed in the card slot 105.
[0034] In some embodiments, the size of the card slot 105 (the size of the card slot 105 is the straight-line distance between two opposite inner sidewalls of the card slot) gradually decreases in the direction from the opening of the card slot to the bottom of the card slot. Correspondingly, the size of the surface of the card slot strip 104 (the size of the surface of the card slot strip 104 is the straight-line distance between the upper and lower surfaces of the card slot strip) gradually decreases in the direction from the first side surface to the second side surface. In a specific embodiment, the cross-sectional shapes of the card slot 105 and the card slot strip 104 are trapezoidal (the cross-sections of the card slot 105 and the card slot strip 104 are Figure 1 the cross-sections obtained in the direction parallel to the zx plane).
[0035] When the material of the card slot strip 104 is a special engineering plastic, in some specific embodiments, the material of the card slot strip 104 can be polyphenylene sulfide (PPS), polyimide (PI), polyether ether ketone (PEEK), polyarylate (PAR), liquid crystal polymer (LCP), or polysulfone (PSF)
[0036] In some embodiments, referring to Figure 2 and Figure 4 , several discrete openings 106 penetrating through the inner sidewall and the outer sidewall of the side portion 103 are provided in the side portion 103. The openings 106 communicate with the corresponding card slot 105. A protrusion 104b is provided on the second side surface of the card slot strip 104. The protrusion 104b is stuck in the corresponding opening 106. When the card slot strip 104 is inserted or installed in the card slot 105, the protrusion 104b can prevent the card slot strip 104 from moving in the insertion direction or the removal direction of the metal frame ( Figure 1 the y-axis direction in). Further, the firmness of the card slot strip 104 inserted or installed in the card slot 105 is improved.
[0037] In some embodiments, at least two of the openings 106 communicate with a corresponding one of the card slots 105. In a specific embodiment, two of the openings 106 communicate with a corresponding one of the card slots 105, and the two openings 106 communicate with the card slot from positions near both ends of the card slot 105 respectively.
[0038] In some embodiments, the number of protrusions 104b on the second side surface of the card slot strip 104 is equal to the number of openings 106 communicating with the corresponding card slots 105, and the second side surface of the card slot strip 104 has at least two discrete protrusions 104b. In a specific embodiment, when each card slot 105 communicates with two openings 106, the second side surface of the corresponding card slot strip 104 has two discrete protrusions 104b. When the card slot strip 104 is inserted or installed in the corresponding card slot 105, the two protrusions 104b on the card slot strip 104 are correspondingly stuck in the two openings 106 communicating with the card slot 105, thereby further improving the firmness of the card slot strip 104 inserted or installed in the card slot 105.
[0039] In some embodiments, the protrusion 104b is a rectangular protrusion or a triangular protrusion, or a combination of both.
[0040] In some embodiments, referring to Figure 2 , an outer frame groove 107 is provided in the outer side wall of the side portion 103 of the metal box body 100, and the opening in the side portion 103 communicates with the outer frame groove 107. The outer frame groove 107 extends in the vertical direction ( Figure 1 the z-axis direction shown), and communicates with a plurality of openings arranged in the vertical direction in the side portion 103. On the one hand, the outer frame groove 107 can facilitate the replacement of the card slot strip 104. On the other hand, when a metal frame is installed in the cartridge later, in order to prevent the metal frame from falling out of the cartridge openings at both ends of the cartridge during the movement of the cartridge, an insertion plate is required to block the cartridge openings at both ends of the cartridge, and the outer frame groove 107 is also used for the fixation of the insertion plate.
[0041] In some embodiments, continuing to refer to Figure 1 and Figure 2 , a plurality of through holes 108 penetrating the inner side wall and the outer side wall of the side portion 103 are further provided in the side portion 103. The through holes 108 are located between adjacent card slots 105, and the quality of the cartridge can be reduced by providing the through holes 108.
[0042] It should be noted that the terms "comprising" and "having" and their variants involved in this application are intended to cover non-exclusive inclusion. The terms "first", "second", etc. are used to distinguish similar objects and do not have to be used to describe a specific order or sequence, unless the context clearly indicates otherwise. It should be understood that the data used in this way can be interchanged under appropriate circumstances. In addition, the embodiments in this application and the features in the embodiments can be combined with each other without conflict. In addition, in the above description, the description of well-known components and technologies is omitted to avoid unnecessarily confusing the concepts of this application. In the above-mentioned various embodiments, each embodiment focuses on the differences from other embodiments, and the same / similar parts between the various embodiments can be referred to each other (or referenced).
[0043] Although the present application has been disclosed above in its preferred embodiments, it is not intended to limit the present application. Any person skilled in the art can make possible changes and modifications to the technical solution of the present application without departing from the spirit and scope of the present application. Therefore, any simple modifications, equivalent changes, and decorations made to the above embodiments based on the technical essence of the present application without departing from the technical solution of the present application shall fall within the protection scope of the technical solution of the present application.
Claims
1. A material box, characterized in that, Comprising: A metal box body, the metal box body comprising an opposite top and bottom, and two opposite side portions located between the top and the bottom, the side portions comprising opposite inner side walls and outer side walls; A plurality of parallel slots provided in the inner side walls of the side portions; Slot bars embedded in the slots, and the material of the slot bars is special engineering plastics, the slot bars comprising opposite first side surfaces and second side surfaces, and upper and lower surfaces located between the first side surface and the second side surface, the second side surface and the upper and lower surfaces being in contact with the slots, the first side surface having a concave groove for limiting the edge of the metal frame when the metal frame is placed.
2. The cartridge according to claim 1, characterized in that, The size of the opening of the slot is smaller than the size of the bottom of the slot.
3. The cartridge according to claim 2, wherein The size of the slot gradually decreases in the direction from the opening of the slot to the bottom of the slot.
4. The cartridge according to claim 1 or 3, characterized in that, The shape of the surface of the slot bar corresponds to the shape of the inner side wall of the slot.
5. The cartridge according to claim 1, characterized in that, A plurality of discrete openings penetrating the inner side wall and the outer side wall are provided in the side portion, and the openings communicate with the corresponding slots.
6. The cartridge according to claim 5, wherein, At least two of the openings communicate with a corresponding one of the slots.
7. The cartridge according to claim 6, wherein The second side surface of the slot bar has a protrusion, and the protrusion is stuck in the corresponding opening.
8. The cartridge according to claim 7, characterized in that, The number of protrusions on the second side surface of the slot bar is equal to the number of openings communicating with the corresponding slot, and the second side surface of the slot bar has at least two discrete protrusions.
9. The cartridge according to claim 5, characterized in that, An outer frame groove is provided in the outer side wall of the side portion of the metal box body, and the opening communicates with the outer frame groove.
10. The cartridge according to claim 1, characterized in that, The material of the special engineering plastics is polyphenylene sulfide, polyimide, polyether ether ketone, polyarylate, liquid crystal polymer or polysulfone.