Material box for preventing product warping in post-curing process
By designing an automated material box containing discrete support plates and press plates, the problem of product warping during post-curing is solved, efficient production without manual operation is achieved, and the risks brought by manual operation are reduced.
Patent Information
- Application Number
- CN202510367109.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-26
- Publication Date
- 2025-06-27
AI Technical Summary
The prior art warp caused by the mismatch of the thermal expansion coefficient of the plastic sealing material and the chip material during the post-curing process, and the existing solutions require manual operation, which is time-consuming and labor-intensive and has the risk of scratches, drops or mixing.
A material box including an outer box body and an inner box body is designed. A separate support plate and press plate are provided in the inner box, equipped with elastic parts and counterweight parts, and the product is placed in the material box in an automated manner, and the press plate is used to resist the expansion and deformation of the product during the post-curing process to prevent warping.
It effectively prevents the product from warping during the post-curing process, reduces the risk of manual operation, improves production efficiency, and automatically puts it in the product to avoid contamination of external pollutants.
Smart Images
Figure CN120206781A_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of semiconductor packaging, and particularly to a cassette for preventing product warping during the post-curing process. Background Art
[0002] With the continuous development of electronic technology, integrated circuits are increasingly widely used in various electronic products. The packaging of integrated circuits is an important link to ensure their stability and reliability. As an important container for storing and transporting integrated circuits, the stability of the packaging cassette has an important impact on the performance and reliability of integrated circuits.
[0003] Packaging is an important link in the chip manufacturing process. To ensure the stability and reliability of the packaging process, cassettes are widely used in the packaging process. During the packaging process, the cassette is mainly used to store and transport products with chips mounted (the products can be printed circuit boards - PCBs or lead frames - lead frames). For example, after chips are mounted and wired on the product, the chips and wires are encapsulated with molding compound to protect them. At this time, uncured molding compound is formed on the product, and then the product is transferred to the cassette. After that, the molding compound is post-cured (PostMold Cure, PMC) in the cassette. During the post-curing process, due to the mismatch in the thermal expansion coefficients of the molding compound, chips, and the product materials, the product will warp. To prevent product warping, currently, it is necessary to manually transfer several products from a common cassette one by one into the corresponding stacking cassette, stack several products, place a pressing block on top, and then perform post-curing. This method is time-consuming and laborious, and is prone to risks such as scratching, dropping, or material mixing. Therefore, there is an urgent need for a new type of cassette that saves labor and can prevent warping and the risks of additional manual operations. Summary of the Invention
[0004] The technical problem to be solved by this application is to provide a cassette for preventing product warping during the post-curing process, so as to eliminate the manual operation of taking products, directly perform post-curing in this cassette to prevent product warping, and can eliminate the risks of scratching, dropping, or material mixing caused by manual operations and improve the production cycle.
[0005] To this end, the embodiments of this application provide a cassette for preventing product warping during the post-curing process, including: An outer box body and an inner frame body disposed inside the outer box body, wherein the outer box body includes a bottom plate and a top plate opposite to each other, Two first side plates fixedly arranged parallel between the bottom plate and the top plate, and several layers of discrete support plates fixedly arranged on the inner walls of the two first side plates and parallel to the upper surface of the bottom plate, with a gap between the upper and lower support plates; The inner frame body includes two second side plates arranged in parallel. The two second side plates are located between the two first side plates and are perpendicular to the first side plates. The inner frame body further includes a plurality of discrete pressing plates fixed to the inner walls of the two second side plates and parallel to the upper surface of the bottom plate. Each layer of the pressing plates is arranged in the gap between the upper and lower support plates. There is still a part of the gap between the lower surface of each layer of the pressing plates and the upper surface of the corresponding lower support plate below to place the product. There are also a plurality of first openings penetrating the second side plates and parallel to the upper surface of the bottom plate in the second side plates. The first openings on the two opposite second side plates are arranged in parallel one by one. Each first opening is located below the fixing position of the corresponding pressing plate on the second side plate. When placing the product into the cartridge, one end of the product enters the gap from the first opening in one of the second side plates of the inner frame body, and the lower surface of the product is placed on the upper surface of the corresponding support plate. An elastic member, fixed to the bottom plate of the outer box body, for applying an upward elastic force to the bottom of the inner frame body; A weight member, placed above the top of the inner frame body, for applying a downward pressure to the top of the inner frame body when pressure needs to be applied, so that the inner frame body moves downward, thereby making the corresponding pressing plate in the inner frame body press on the corresponding product.
[0006] In an alternative embodiment, the distance between adjacent pairs of the first openings in the direction perpendicular to the bottom plate is equal.
[0007] In an alternative embodiment, the distance between adjacent layers of the support plates in the direction perpendicular to the bottom plate is equal, and the distance between adjacent layers of the pressing plates is the same.
[0008] In an alternative embodiment, the width of the gap in the direction perpendicular to the bottom plate is greater than the width of the first opening in the direction perpendicular to the bottom plate.
[0009] In an alternative embodiment, one end of the elastic member is fixed to the bottom plate or the upper surface of the outer box body, and the other end of the elastic member is fixed to the bottom or the lower surface of the bottommost pressing plate of the inner frame body.
[0010] In an alternative embodiment, the elastic member includes a spring, and the number of the springs is one or more.
[0011] In an alternative embodiment, when there are multiple springs, the multiple springs are evenly distributed between the bottom of the inner frame body and the upper surface of the bottom plate of the outer box body.
[0012] In an alternative embodiment, the counterweight member includes a counterweight block; at least one limiting groove penetrating through the top plate is provided in the top plate of the outer box body; at least one protruding limiting portion is provided on the upper surface of the pressing plate at the topmost layer of the inner frame body. When the inner frame body is disposed in the outer box body, the limiting portion is defined in the corresponding limiting groove, and the top of the limiting portion protrudes from the upper surface of the top plate of the outer box body when the counterweight block is not placed. When pressure needs to be applied, the counterweight block is placed on the top of the protruding limiting portion on the upper surface of the top plate of the outer box body. Under the action of the gravity of the counterweight block, the limiting portion is pressed down, so that the inner frame body moves downward, and at the same time, the elastic member is also compressed until the corresponding pressing plate in the inner frame body presses on the corresponding product.
[0013] In an alternative embodiment, the number of the limiting portions is two, and the number of the corresponding limiting grooves is two.
[0014] In an alternative embodiment, the counterweight blocks have different weights.
[0015] In an alternative embodiment, each pressing plate includes two parallel first side surfaces and two parallel second side surfaces perpendicular to the first side surfaces. The two first side surfaces are correspondingly fixed on the side surfaces of the corresponding second side plates; upwardly protruding third side plates are further provided on the opposite second side surfaces of each pressing plate. An opening penetrating through the upper surface and the inner and outer side walls is provided in the third side plate. The surface of each support plate parallel to the first side plate is fixed on the inner wall of the first side plate through a fixing structure passing through the opening.
[0016] In an alternative embodiment, two parallel chutes perpendicular to the upper surface of the bottom plate are provided on the inner wall of each first side plate. The two opposite side surfaces of the second side plate perpendicular to the upper surface of the bottom plate are located in the corresponding chutes of the two first side plates. When the inner frame body moves upward or downward, the side surfaces of the second side plate slide in the corresponding chutes; two grooves parallel to each other and perpendicular to the first side plate are further provided on the upper surface of the bottom plate. When the inner frame body moves downward, the bottom end of the second side plate extends into the corresponding groove.
[0017] The advantages of the technical solution of the present application are as follows: The cartridge for preventing warping of products during post-curing described in the foregoing application of the present application. When placing a product into the cartridge of the present application, one end of the product enters the gap from a first opening in one of the second side plates of the inner frame body, and the lower surface of the product is placed on the upper surface of the corresponding support plate. After the product is placed in the cartridge, when post-curing and heating the product in the cartridge, a weight component needs to be placed above the top of the inner frame body. The weight component applies a downward pressure on the top of the inner frame body, causing the inner frame body to move downward, so that the corresponding pressing plate in the inner frame body presses on the corresponding product. When the pressing plate presses on the corresponding product, the pressing plate can resist the expansion deformation of the product when heated, thereby preventing warping of the product. Moreover, due to a plurality of pressing plates arranged vertically and separated from each other in the inner frame body in a direction perpendicular to the bottom plate, each pressing plate can press on the product, that is, it can prevent warping of a plurality of products placed in the cartridge at the same time, improving efficiency. In addition, when placing the product into the cartridge of the present application, it can be automatically completed by the manufacturing equipment on the packaging production line, improving efficiency and preventing external contaminants from contaminating the product. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Figure 1 is an exploded view or a three-dimensional assembly view of the cartridge in an embodiment of the present application; Figure 2 In an embodiment of the present application Figure 1 is a schematic structural diagram of the cartridge shown when placing a weight component; Figure 3 In an embodiment of the present application along Figure 1 or Figure 2 is a schematic structural diagram of the assembled cartridge obtained along the cutting line AA1 direction in; Figure 4 In an embodiment of the present application Figure 3 is a schematic structural diagram of the cartridge shown after placing a product; Figure 5 In an embodiment of the present application Figure 4 is a schematic structural diagram of the cartridge shown after placing a weight component; Figure 6 In an embodiment of the present application along Figure 1 or Figure 2 is a schematic structural diagram of the assembled cartridge obtained along the cutting line BB1 direction in; Figure 7 In an embodiment of the present application Figure 6 is a schematic structural diagram of the cartridge shown after placing a product; Figure 8 In an embodiment of the present application Figure 7 is a schematic structural diagram of the cartridge shown after placing a weight component. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0019] The following will describe in detail the specific embodiments of the present application with reference to the accompanying drawings. When detailing the embodiments of the present application, for ease of explanation, 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.
[0020] An embodiment of the present application provides a cartridge for preventing warping of a product during the post-curing process.
[0021] Figure 1 is an exploded view or a three-dimensional assembly view of the cartridge in an embodiment of the present application; Figure 2 In an embodiment of the present application Figure 1 is a schematic structural view of the cartridge shown when a weight component is placed thereon; Figure 3 In an embodiment of the present application along Figure 1 or Figure 2 is a schematic structural view of the assembled cartridge obtained in the direction of the cutting line AA1; Figure 4 In an embodiment of the present application Figure 3 is a schematic structural view of the cartridge shown after a product is placed therein; Figure 5 In an embodiment of the present application Figure 4 is a schematic structural view of the cartridge shown after a weight component is placed thereon; Figure 6 In an embodiment of the present application along Figure 1 or Figure 2 is a schematic structural view of the assembled cartridge obtained in the direction of the cutting line BB1; Figure 7 In an embodiment of the present application Figure 6 is a schematic structural view of the cartridge shown after a product is placed therein; Figure 8 In an embodiment of the present application Figure 7 is a schematic structural view of the cartridge shown after a weight component is placed thereon.
[0022] Referring to Figure 1 and Figure 2 , and in combination with referring to Figures 3 - 5 and Figures 6 - 8 , the cartridge includes: An outer box body 100 and an inner frame body 110 disposed inside the outer box body 100 (refer to Figures 3 - 5 or refer to Figures 6 - 8 ), wherein the outer box body 100 includes a bottom plate 101 and a top plate 102 opposite to each other, two first side plates 103 fixedly disposed between the bottom plate 101 and the top plate 102 and arranged in parallel, and a plurality of layers of discrete support plates 109 fixedly disposed on the inner walls of the two first side plates 103 and parallel to the upper surface of the bottom plate 101, and there is a gap 113 between the upper and lower support plates 109; The inner frame body 110 includes two second side plates 104 arranged in parallel (refer toFigure 1 and Figure 2 , and Figures 6 - 8 ) The two second side plates 104 are located between the two first side plates 103 and are perpendicular to the first side plates 103. The inner frame 110 further includes a plurality of discrete pressing plates 112 fixed to the inner walls of the two second side plates 104 and parallel to the upper surface of the bottom plate 101. Each layer of the pressing plates 112 is disposed in a gap 113 between the upper and lower support plates 109. There is still a part of the gap 113 between the lower surface of each layer of the pressing plates 112 and the upper surface of the corresponding lower support plate 109 below to place the product; there are also a plurality of first openings 105 passing through the second side plates 104 and parallel to the upper surface of the bottom plate 101 in the second side plates 104. The first openings 105 on the opposite two second side plates are arranged in parallel one by one. Each first opening 105 is located below the fixing position of the corresponding pressing plate 112 on the second side plate 104. When the product 201 is placed in the cartridge (refer to Figure 7 ), one end of the product 201 enters the gap 113 from the first opening 105 in one of the second side plates 104 of the inner frame 110, and the lower surface of the product 201 is placed on the upper surface of the corresponding support plate 109; Elastic member 301, fixed to the bottom plate 101 of the outer box 100, for applying an upward elastic force to the bottom of the inner frame 110 (refer to Figures 3 - 5 ); Counterweight member 304, placed above the top of the inner frame 110, for applying a downward pressure to the top of the inner frame 110 when pressure needs to be applied, so that the inner frame 110 moves downward, so that the corresponding pressing plate 112 in the inner frame 110 presses on the corresponding product 201 (refer to Figure 1 and Figure 5 and Figure 8 ).
[0023] Specifically, the cartridge in the present application is used to transport and store the product 201. After the product 201 is placed in the cartridge of the present application, post-curing or thermal reflow can be directly performed on the product 201 in the cartridge. Specifically, in one embodiment, after an incompletely cured encapsulation material is formed on the upper surface or the lower surface of the product 201, the encapsulation material can be used to coat a device (such as a semiconductor chip), or to fill the gap between devices or between a device and the product. The product 201 is placed in the cartridge of the present application for post-curing to cure the encapsulation material. In another embodiment, when pins or bumps on a device are soldered to the product 201 through solder, thermal reflow is required after soldering. After the pins or bumps on the device are preliminarily soldered to the product 201 through solder, the product 201 is placed in the cartridge of the present application for thermal reflow to cure the solder. Whether the product needs post-curing or thermal reflow, and when the product warps upward or downward during post-curing or thermal reflow, only a plurality of products to be post-cured or thermally reflowed need to be sequentially placed in the cartridge of the present application. During post-curing or thermal reflow, the counterweight member 304 is placed above the top of the inner frame 110. The counterweight member 304 applies a downward pressure on the top of the inner frame 110, causing the inner frame 110 to move downward, so that the corresponding pressing plate 112 in the inner frame 110 presses on the corresponding product 201. When the pressing plate 112 presses on the corresponding product 201, the pressing plate 112 can resist the deformation of the product 201 caused by heat during post-curing, thereby preventing the product 201 from warping. Moreover, due to the plurality of pressing plates 112 arranged vertically and separated from each other in the inner frame 110 along a direction perpendicular to the bottom plate 101, each pressing plate 112 can press on the product 201, that is, the warping of a plurality of products 201 placed in the cartridge can be improved simultaneously, improving the efficiency. In addition, when the product 201 is placed in the cartridge of the present application, it can be automatically completed by the equipment on the packaging production line, improving the efficiency and preventing external contaminants from contaminating the product 201.
[0024] In one embodiment, the product 201 can be a resin substrate, a silicon substrate, a printed circuit board (PCB), a redistribution layer (RDL) substrate, a ceramic substrate, a glass substrate, a metal frame, or an alloy frame. One or several of semiconductor chips and passive devices electrically connected to the substrate can be mounted inside the product 201.
[0025] The outer box body 100 is a cube. The outer box body 100 includes a relatively positioned bottom plate 101 and a top plate 102, and two first side plates 103 located between the bottom plate 101 and the top plate 102. The inner frame 110 is accommodated in the space surrounded by the bottom plate 101, the top plate 102, and the two first side plates 103. The bottom plate 101, the top plate 102, and the two first side plates 103 are fixedly connected. In one embodiment, the fixed connection can be achieved by the cooperation of screws and screw holes. For example, when the bottom plate 101 and the top plate 102 are respectively fixedly connected to the first side plates 103, threaded screw holes are provided at the top and bottom of the first side plates 103, and through holes are provided in the bottom plate 101 and the top plate 102. A number of the screws pass through the corresponding through holes in the bottom plate 101 and the top plate 102 from the side away from the first side plates 103 and are screwed into the corresponding screw holes at the top and bottom of the first side plates 103 to fixedly connect the bottom plate 101 and the top plate 102 to the first side plates 103 respectively.
[0026] The inner frame body 110 is located inside the outer box body 100. The inner frame body 110 includes two second side plates 104 arranged in parallel, and a number of discrete pressing plates 112 fixed to the inner walls of the two second side plates 104 and parallel to the upper surface of the bottom plate 101 (refer to Figure 1 or Figure 2 or Figures 3 - 5 ). Each layer of the pressing plates 112 is arranged in the gap 113 between the upper and lower supporting plates 109. There is still a part of the gap 113 between the lower surface of each layer of the pressing plates 112 and the upper surface of the corresponding lower supporting plate 109 for placing products. The second side plates 104 have a number of first openings 105 passing through the second side plates 104 and parallel to the upper surface of the bottom plate 101 (refer to Figure 1 or Figure 2 or Figures 6 - 8 ). The first openings 105 on the two opposite second side plates 104 are arranged in parallel one by one. The first openings 105 in one of the second side plates 104 serve as channels for the product 201 to be put in and taken out. In one embodiment, the spacing between adjacent pairs of the first openings 105 is equal in the direction perpendicular to the upper surface of the bottom plate 101. When the product 201 is placed in the box, one end of the product 201 (such as the front end, and the product 201 may include a front end and a rear end at both ends) first passes through one of the first openings 105 in one of the second side plates 104, and then enters the gap 113 between the upper and lower supporting plates 109, and the lower surface of the product 201 is placed on the upper surface of the corresponding supporting plate 109.
[0027] In one embodiment, the spacing between adjacent pairs of the first openings 105 in a direction perpendicular to the bottom plate 101 is equal, and the spacing between adjacent layers of the support plates 109 in a direction perpendicular to the bottom plate 101 is equal. The spacing between adjacent layers of the pressing plates 112 is the same. The width of the gap 113 in a direction perpendicular to the bottom plate 102 is greater than the width of the first opening 105 in a direction perpendicular to the bottom plate 101. On the one hand, it is convenient for the product 201 to be placed in the cartridge of the present application. On the other hand, it can open and close the channels for placing and removing the product in the cartridge of the present application.
[0028] In one embodiment, continue to refer to Figure 1 or Figure 2 , each of the pressing plates 112 includes two parallel first side surfaces and two parallel second side surfaces perpendicular to the first side surfaces. The two first side surfaces are correspondingly fixed on the side surfaces of the corresponding second side plates 104 (refer to Figures 6 - 8 ). Specifically, the fixing method can adopt the fixing method of screw and screw hole cooperation; the opposite second side surfaces of each of the pressing plates 112 further have upwardly protruding third side plates 111 (refer to Figure 1 or Figure 2 ). The third side plates 111 further define the position of the product 201 placed in the cartridge and can prevent the product from moving in a direction perpendicular to the inner wall of the first side plate 103. The third side plates 111 have second openings 114 penetrating the upper surface and the inner and outer side walls of the third side plates 111. The surface of each of the support plates 109 parallel to the first side plate 103 is fixed on the inner wall of the first side plate 103 through a fixing structure passing through the second openings 114. The fixing structure includes screws. The second openings 114 not only provide a channel for fixing the support plates 109 on the first side plate 103, but also prevent the support plates 109 from hindering the up and down movement of the pressing plates 112.
[0029] In one embodiment, the inner wall of each of the first side plates 103 has two parallel chutes 116 perpendicular to the upper surface of the bottom plate 101. The two opposite side surfaces of the second side plates 104 perpendicular to the upper surface of the bottom plate 101 are located in the corresponding chutes 116 of the two first side plates 103. When the inner frame 110 moves up or down, the side surfaces of the second side plates 104 slide in the corresponding chutes 116, thereby defining the position of the inner frame 110 when moving up and down and preventing the inner frame 110 from shifting when moving up and down. In other embodiments, a slide rail is provided between the inner wall of the first side plate 103 and the side surface of the second side plate 104 to define the up and down movement of the inner frame 110; the upper surface of the bottom plate 101 also has two grooves 115 parallel to each other and perpendicular to the first side plate 103 (refer to Figure 1 orFigure 2 , or refer to Figures 6 - 7 ), when the inner box body 110 moves downward, the bottom end of the second side plate 104 extends into the corresponding groove 115, preventing the bottom plate 101 from obstructing or affecting the downward movement of the inner box body 110 and leaving enough space for the inner box body 110 to move downward.
[0030] In one embodiment, the materials of the outer box body 100 and the inner box body 110 are both metal or alloy. Specifically, the bottom plate 101, the top plate 102, the second side plate 104, and the first side plate 103 of the outer box body 100 are metal or alloy, and the third side plate 111 and the pressing plate 112 of the inner box body 110 are metal or alloy. In one embodiment, the metal can be stainless steel, aluminum, or other suitable metals, and the alloy can be aluminum alloy.
[0031] One end of the elastic member 301 is fixed in or on the upper surface of the bottom plate 101 of the outer box body 100, and the other end of the elastic member 301 is fixed to the bottom of the inner box body 110. The elastic member 301 is used to apply an upward elastic force to the bottom of the inner box body 110 (refer to Figures 3 - 5 ). On the one hand, when no counterweight member 304 is placed above the top of the inner box body 110, the elastic member 301 supports the inner frame 110, so that several gaps 113 in the inner frame 110 are respectively located between two corresponding first openings 105 in the first side wall 104 of the outer box body 100, facilitating the placement of the product 201 into the cartridge. On the other hand, when the counterweight member 304 is placed above the top of the inner box body 110, the buffering of the elastic member 301 enables the inner box body 110 to slowly descend, preventing the pressing plate 112 of the inner box body 110 from pressing rapidly on the product 201 and causing damage to the product 201. On the other hand, after heat treatment, after removing the counterweight member 304, the elastic member 301 can make the inner box body return to its initial position.
[0032] In one embodiment, one end of the elastic member 301 is fixed in or on the upper surface of the bottom plate 101 of the outer box body 100, and the other end of the elastic member 301 is fixed to the bottom or the lower surface of the bottom of the pressing plate 112 of the innermost layer of the inner box body 110.
[0033] In one embodiment, the elastic member 301 includes a spring, and the number of the springs is one or more. When there are multiple springs, the multiple springs are evenly distributed between the bottom of the inner box body 110 and the upper surface of the bottom plate 101 of the outer box body 100, making the force on the inner box body 110 more uniform and thus making the movement of the inner box body 110 smoother.
[0034] In this application, after the product 201 is placed in the cartridge, the product 201 is subjected to hot baking. Meanwhile, a counterweight member 304 is placed above the top of the inner housing 110 (refer to Figure 5 or Figure 8 ). The counterweight member 304 exerts a downward pressure on the top of the inner housing 110, causing the inner housing 110 to move downward, so that the corresponding pressing plate 112 in the inner housing 110 presses on the corresponding product 201. The pressing plate 112 can resist the thermal deformation generated by the product 201 during the post-curing process, thereby preventing the product 201 from warping due to heat.
[0035] In one embodiment, the counterweight member 304 includes a counterweight block, and the counterweight block has different weights to meet the counterweight requirements when different products 201 are heat-treated; at least one limiting groove 303 penetrating the top plate is provided in the top plate 102 of the outer housing 100; at least one protruding limiting portion 302 is provided on the upper surface of the topmost pressing plate 112 of the inner housing 110. When the inner housing 110 is disposed in the outer housing 100, the limiting portion 302 is defined in the corresponding limiting groove 303 (refer to Figures 3 - 4 or Figures 6 - 7 ), and the top of the limiting portion 302 protrudes above the upper surface of the top plate 102 of the outer housing 100 when the counterweight block is not placed (refer to Figures 3 - 4 or Figures 6 - 7 ); when pressure needs to be applied, the counterweight block is placed on the top of the protruding limiting portion 302 on the upper surface of the top plate 102 of the outer housing 100 (refer to Figure 5 or Figure 8 ). Under the action of the gravity of the counterweight block, the limiting portion 302 is pressed downward, so that the inner housing 110 moves downward, and at the same time, the elastic member 301 is also compressed until the corresponding pressing plate 112 in the inner housing 110 presses on the corresponding product 201 (refer to Figure 5 or Figure 8 ).
[0036] In one embodiment, the limiting portion 302 and the topmost pressing plate 112 of the inner housing 110 are of an integral structure. In another embodiment, the limiting portion 302 and the topmost pressing plate 112 of the inner housing 110 are independent structures, and the limiting portion 302 is fixed on the upper surface of the topmost pressing plate 112 of the inner housing 110 by screws or welding.
[0037] The number of the limiting portions 302 can be one or more. In one embodiment, the number of the limiting portions 302 is two (refer to Figure 1 or Figure 2 ), and the number of the corresponding limiting grooves 303 is two.
[0038] The embodiment of the present application further provides a manufacturing method for a packaging structure. Referring to Figure 1 and Figure 2 , and in combination with reference to Figures 3 - 5 and Figures 6 - 8 , the manufacturing method includes: Providing a product 201, on the upper surface of which an uncured encapsulation layer (not shown in the figure) is formed; Providing the foregoing cartridge, and no weight member 304 is placed above the top of the inner frame 110; Placing the product 201 in the cartridge. When the product 201 is placed in the cartridge, the lower surface of the product 201 is located on the upper surface of the support plate 109; Performing post-curing on the encapsulation layer, and at the same time placing a weight member 304 above the top of the inner frame 110. The weight member 304 exerts a downward pressure on the top of the inner frame 110, causing the inner frame 110 to move downward, so that the corresponding pressing plate 112 in the inner frame 110 presses on the corresponding product 201.
[0039] The above method can prevent the product 201 from warping due to heat during the post-curing process.
[0040] Although the present application has been disclosed above with 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 by using the disclosed methods and technical contents without departing from the spirit and scope of the present application. Therefore, any simple modification, equivalent change, and modification 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 for preventing product warping during post-curing, characterized in that: include: An outer box body and an inner frame body arranged inside the outer box body, wherein the outer box body comprises a bottom plate and a top plate opposite to each other, two first side plates fixed between the bottom plate and the top plate and arranged in parallel, and a plurality of separate support plates fixed to the inner walls of the two first side plates and parallel to the upper surface of the bottom plate, with a gap between the upper and lower support plates; The inner frame comprises two second side panels arranged in parallel, the two second side panels are located between the two first side panels and are perpendicular to each other, the inner frame further comprises a plurality of layers of discrete pressing plates fixed to the inner walls of the two second side panels and parallel to the upper surface of the bottom plate, each layer of the pressing plates is arranged in the gap between the upper and lower support plates, and a portion of the gap is still provided between the lower surface of each layer of the pressing plates and the upper surface of the corresponding support plate below for placing the product; the second side panel also comprises a plurality of first openings that penetrate the second side panel and are parallel to the upper surface of the bottom plate, the first openings on the two opposite second side panels are arranged in parallel one by one, each of the first openings is located below the fixed position of the corresponding pressing plate on the second side panel, and when the product is placed in the material box, one end of the product enters the gap from the first opening in one of the second side panels of the inner frame, and the lower surface of the product is placed on the upper surface of the corresponding support plate; An elastic component, fixed to the bottom plate of the outer box body, and used to apply an upward elastic force to the bottom of the inner frame body; The counterweight component is placed above the top of the inner frame and is used to apply downward pressure to the top of the inner frame when pressure needs to be applied, so that the inner frame moves downward, thereby causing the corresponding pressure plate in the inner frame to press on the corresponding product.
2. The material box according to claim 1, characterized in that: The spacings between adjacent pairs of the first openings in a direction perpendicular to the bottom plate are equal.
3. The material box according to claim 2, characterized in that: The spacings between the support plates of adjacent layers along a direction perpendicular to the bottom plate are equal, and the spacings between the pressing plates of adjacent layers are the same.
4. The material box according to claim 3, characterized in that: A width of the gap in a direction perpendicular to the bottom plate is greater than a width of the first opening in a direction perpendicular to the bottom plate.
5. The material box according to claim 1, characterized in that: One end of the elastic component is fixed to the bottom plate or upper surface of the outer box body, and the other end of the elastic component is fixed to the bottom plate or lower surface of the bottom layer of the inner frame body.
6. The material box according to claim 5, characterized in that: The elastic component includes a spring, and the number of the spring is one or more.
7. The material box according to claim 6, characterized in that: When there are multiple springs, the multiple springs are evenly distributed between the bottom of the inner frame and the upper surface of the bottom plate of the outer box.
8. The material box according to claim 1, characterized in that: The counterweight component includes a counterweight block; the top plate of the outer box body has at least one limiting groove that penetrates the top plate; the upper surface of the topmost pressure plate of the inner frame body has at least one raised limiting portion, and when the inner frame body is arranged in the outer box body, the limiting portion is limited in the corresponding limiting groove, and when the counterweight block is not placed, the top of the limiting portion protrudes from the upper surface of the top plate of the outer box body; when pressure needs to be applied, the counterweight block is placed on the top of the raised limiting portion on the upper surface of the top plate of the outer box body, and under the action of the gravity of the counterweight block, the limiting portion is pressed downward, thereby causing the inner frame to move downward, and the elastic component is also compressed until the corresponding pressure plate in the inner frame is pressed on the corresponding product.
9. The material box according to claim 8, characterized in that: The number of the limiting parts is two, and the number of the corresponding limiting grooves is two.
10. The material box according to claim 8, characterized in that: The counterweights have different weights.
11. The material box according to claim 1, characterized in that: Each of the pressure plates includes two first side surfaces arranged in parallel and two second side surfaces arranged in parallel and perpendicular to the first side surfaces, and the two first side surfaces are fixed on the side surfaces of the corresponding second side plates respectively; the second side surfaces opposite to each of the pressure plates also include an upwardly protruding third side plate, and the third side plate includes a second opening that passes through the upper surface and the inner and outer side walls of the third side plate; the surface of each of the support plates parallel to the first side plate is fixed to the inner wall of the first side plate by a fixing structure passing through the second opening.
12. The material box according to claim 11, characterized in that: The inner wall of each of the first side panels has two slide grooves arranged in parallel and perpendicular to the upper surface of the bottom plate, and the two opposite side surfaces of the second side panel perpendicular to the upper surface of the bottom plate are located in the corresponding slide grooves of the two first side panels. When the inner frame moves upward or downward, the side surfaces of the second side panels slide in the corresponding slide grooves; the upper surface of the bottom plate also has two grooves arranged in parallel and perpendicular to the first side panels. When the inner frame moves downward, the bottom end of the second side panel extends into the corresponding groove.