Curing and drying box for COB packaging substrate

Abstract

The utility model discloses a curing and drying box for a COB packaging substrate, which belongs to the technical field of COB packaging equipment and comprises a drying box body and a storage assembly rotationally connected with a drying cavity arranged in the drying box body, and a driving part for driving the storage assembly to rotate is arranged on the drying box body. The storage assembly comprises a supporting piece rotationally arranged in the drying cavity, a plurality of storage pieces rotationally arranged in the supporting piece and used for bearing the packaging substrates, an air blowing piece used for guiding hot air in the drying cavity, and a transmission piece used for linkage between the driving part and the air blowing piece. According to the COB packaging substrate drying device, the blowing part, the transmission part, the supporting part and other structures are used in cooperation, the blowing part can be driven to operate when the supporting part drives the object containing part to move in the circumferential direction, hot air at other positions in the drying cavity is actively and efficiently guided to the surface of a COB packaging substrate, the contact efficiency of the hot air and the COB packaging substrate is improved, and therefore the curing efficiency and baking uniformity of the COB packaging substrate are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of COB packaging equipment, and specifically relates to a curing and drying oven for COB packaging substrates. Background Technique

[0002] In the COB packaging process flow, after the die bonding step is completed, it is necessary to promptly send it into a curing and drying oven, set the temperature and time, and complete the encapsulation and curing step. When the existing curing and drying oven for packaging substrates cures and bakes the packaging substrate, on the premise that the packaging substrate always remains in a horizontal state, the packaging substrate can be rotated circumferentially in the vertical direction, so that the packaging substrate is baked at relatively uniform positions in the baking oven. However, during its use, when the packaging substrate is moved downward during circumferential transfer, it will squeeze the high-temperature air to both sides of the packaging substrate, reducing the contact rate between the high-temperature air and the glue on the top of the packaging substrate, and affecting the baking uniformity and curing efficiency of the packaging substrate.

[0003] The existing patent application number: 202410351444.3 discloses a baking and curing device for TOLL packaging. This device enables multiple carrier plates to rotate following two corresponding rotating disks, ensuring that the carrier plates move following the rotating disks in a horizontal state, enabling the wafer chips to be heated evenly, and cooperating with the airflow impact during the rotation of the rotating disks to make the turbulence fan rotate and direct the high-temperature air towards the wafer chips, improving the curing uniformity of the glue. In the above existing technology, since the rotating disk drives the carrier plate to perform vertical circumferential movement and keeps the carrier plate in a horizontal state during this process, there are still the above-mentioned technical problems when it moves downward. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a curing and drying oven for COB packaging substrates, so as to solve the problem that when the packaging substrate is moved downward during circumferential transfer, it will squeeze the high-temperature air to both sides of the packaging substrate, reducing the contact rate between the high-temperature air and the glue on the top of the packaging substrate, and affecting the baking uniformity and curing efficiency of the packaging substrate as mentioned in the above background technique.

[0005] To achieve the above purpose, the utility model adopts the following technical scheme:

[0006] A curing and drying oven for COB packaging substrates provided by the utility model includes a drying box body and a placing component rotatably connected to a drying cavity arranged in the drying box body. A driving part for driving the placing component to rotate is arranged on the drying box body. The placing component includes:

[0007] A support member rotatably arranged in the drying cavity.

[0008] A plurality of placing members rotatably arranged in the support member for supporting the packaging substrate.

[0009] A blowing member for driving hot air in the drying cavity.

[0010] A transmission member for linkage between the driving part and the blowing member.

[0011] The object placing member includes a bushing rotatably arranged within the support member.

[0012] The blowing member includes:

[0013] A fan shaft rotatably connected to a perforation provided on the bushing.

[0014] A plurality of fan blades horizontally fixed on the fan shaft for driving hot air.

[0015] Further, the support member includes:

[0016] A support shaft horizontally rotatably arranged within the drying cavity.

[0017] A support disk relatively fixed on the support shaft.

[0018] Further, the bushing is rotatably arranged on the support disk, and one end of the fan shaft passes through the perforation and extends between the support disk and the inner wall of the drying cavity.

[0019] Further, the object placing member further includes:

[0020] A U-shaped frame fixed between the two bushings for supporting the encapsulation substrate, and a through groove is provided on the U-shaped frame.

[0021] A plurality of support rods fixed within the through groove.

[0022] An object taking groove provided on the U-shaped frame for taking the encapsulation substrate.

[0023] Further, the fan shaft and the bushing are coaxial, and the distance between the fan shaft and the U-shaped frame is greater than the width of the fan blade.

[0024] Further, the transmission member includes:

[0025] A toothed ring fixed on the inner wall of the drying cavity.

[0026] A transmission tooth fixed at one end of the fan shaft, and the tooth surface of the transmission tooth meshes with the tooth surface within the toothed ring.

[0027] Compared with the prior art, the above one or more technical solutions have the following beneficial effects:

[0028] 1. By using the cooperation of structures such as a blowing member, a transmission member, and a supporting member, when the supporting member drives the object to move circumferentially, the blowing member can be driven to operate, actively guiding the hot air at other positions in the drying cavity to the surface of the COB packaging substrate efficiently, improving the contact efficiency between the hot air and it, thereby improving its curing efficiency and baking uniformity.

[0029] 2. During the curing and baking process of the COB packaging substrate, multiple blowing members move synchronously with it, and can drive the flow of hot air in the drying cavity at any position on the moving path of the object. During the drying process, the temperature distribution in the drying cavity is always kept relatively uniform. In cooperation with the through groove and the support rod, the contact efficiency between the lower surface of the COB packaging substrate and the hot air is improved, and the curing and baking efficiency is further improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 is an isometric view of the present utility model;

[0031] Figure 2 is an isometric view of the component in the present utility model;

[0032] Figure 3 is an isometric view of the supporting member and the object in the present utility model.

[0033] In the figure: 1. Drying box body; 2. Drying cavity; 3. Object placing assembly; 31. Supporting member; 311. Horizontal axis; 312. Support disk; 32. Object; 321. Bush; 322. U-shaped frame; 323. Through groove; 324. Support rod; 325. Object taking groove; 33. Blowing member; 331. Perforation; 332. Fan shaft; 333. Fan blade; 34. Transmission member; 341. Transmission tooth; 342. Tooth ring; 4. Driving part; 5. Heat insulation door. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0034] In order to enable those skilled in the art to better understand the solution of this application, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of this application.

[0035] As Figures 1 to 3 shown, a curing and drying box for a COB packaging substrate includes a drying box body 1 and an object placing assembly 3 rotatably connected to a drying cavity 2 provided in the drying box body 1. A heat insulation door 5 for sealing and heat insulating the drying cavity 2 is provided on the drying box body 1. A driving part 4 for driving the object placing assembly 3 to rotate is provided on the drying box body 1. The object placing assembly 3 includes:

[0036] A supporting member 31 rotatably provided in the drying cavity 2.

[0037] A plurality of objects 32 rotatably provided in the supporting member 31 for supporting the packaging substrate.

[0038] A blowing member 33 for driving hot air in the drying chamber 2.

[0039] A transmission member 34 for linking the driving part 4 and the blowing member 33.

[0040] The object placing member 32 includes a bushing 321 rotatably disposed within the support member 31.

[0041] The blowing member 33 includes:

[0042] A fan shaft 332 rotatably connected to a through hole 331 provided on the bushing 321.

[0043] A plurality of fan blades 333 horizontally fixed to the fan shaft 332 for driving hot air.

[0044] When the COB packaging substrate after die bonding is fully loaded on the object placing member 32, the drying box body 1 and the driving part 4 can be started, so that the temperature in the drying chamber 2 rises to the temperature required for curing and baking the COB packaging substrate, and the temperature is maintained for a certain period of time to enable it to complete the curing operation. The power generated by the driving part 4 can directly drive the support member 31 to rotate and drive the object placing member 32 to rotate. At the same time, since the object placing member 32 and the support member 31 are in a rotational connection relationship, and due to the characteristics of the object placing member 32, it can always maintain a horizontal state when the support member 31 drives the object placing member 32 to rotate, avoiding affecting the quality of the COB packaging substrate. At the same time, through the power transmission effect of the transmission member 34, part of the power generated by the driving part 4 can be transmitted to all the blowing members 33, so that the rotation directions of all the fan shafts 332 are the same, and the rotating fan shafts 332 drive the fan blades 333 to rotate synchronously, thereby actively driving the hot air to the top of the COB packaging substrate carried on the object placing member 32. When the object placing member 32 is driven to perform a circumferential movement, hot air can always flow from the top of the surface of the COB packaging substrate during its movement, greatly increasing the contact rate between its top and the hot air, achieving the improvement of the curing and baking efficiency of the COB packaging substrate. Along with the support member 31 driving the blowing member 33 to perform a revolution, the hot air in the drying chamber 2 can flow everywhere, enabling rapid and uniform heating when the inside is heated, and keeping the hot air in each part inside evenly distributed, improving the heat uniformity of the COB packaging substrate and the curing and baking effect of the COB packaging substrate.

[0045] In this embodiment, the support member 31 includes:

[0046] A support shaft 311 horizontally rotatably disposed within the drying chamber 2.

[0047] The support disc 312 is relatively fixed on the support shaft 311, and the bushings 321 on the two support discs 312 always correspond to each other, so that while the object 32 is kept horizontal, a revolution motion can be realized, so that the COB packaging substrate can be uniformly heated and the effect of its curing and baking can be improved.

[0048] In this embodiment, the bushing 321 is rotatably arranged on the support disc 312, and one end of the fan shaft 332 passes through the through hole 331 and extends between the support disc 312 and the inner wall of the drying chamber 2. With such a design, it is not only convenient for the support member 31 to drive the blowing member 33 to revolve, but also a sufficient distance can be reserved between the support member 31 and the inner wall of the drying chamber 2, so as to facilitate the installation of the transmission member 34, realize the partial power shunt transmission of the driving part 4 to the blowing member 33, drive the blowing member 33 to operate, and lead the hot air to the top of the COB packaging substrate, greatly increasing the contact probability between the COB packaging substrate and the hot air, and facilitating the improvement of the curing and baking efficiency of the COB packaging substrate.

[0049] In this embodiment, the object 32 further includes:

[0050] A U-shaped frame 322 fixed between the two bushings 321 for supporting the packaging substrate, and a through groove 323 is provided on the U-shaped frame 322.

[0051] A number of support rods 324 fixed in the through groove 323.

[0052] A pick-up groove 325 provided on the U-shaped frame 322 for picking up the packaging substrate.

[0053] Due to the shape characteristics of the U-shaped frame 322, when the support member 31 drives it to revolve, under the action of gravity, the COB packaging substrate contained therein can always be kept horizontal, which is beneficial to maintaining the state after die bonding before the glue on it is solidified, avoiding the position deviation of the components on it and affecting its quality, and can lead the hot air in the drying chamber 2 to flow circumferentially. Combined with the effect of the blowing member 33 on guiding the hot air, the effect of accelerating the uniform distribution of heat in the drying chamber 2 can be achieved, and the probability of contact between the hot air and the top of the COB packaging substrate can be increased, thereby increasing the curing efficiency of the glue on the COB packaging substrate.

[0054] In this embodiment, the fan shaft 332 and the bushing 321 are coaxial, and the distance between the fan shaft 332 and the U-shaped frame 322 is greater than the width of the fan blade 333. Such a design is to reserve enough space to facilitate placing the COB packaging substrate in the through groove 323 and being supported by multiple support rods 324, and to maximize the gap at the bottom of the COB packaging substrate. This can not only achieve the limiting effect on the COB packaging substrate and prevent the position deviation of the COB packaging substrate during the synchronous revolution with the U-shaped frame 322, which may affect the production quality of the COB packaging substrate, but also increase the probability of hot air contacting the bottom of the COB packaging substrate during its revolution, making it evenly heated up and down, and greatly shortening the curing time of the glue on the COB packaging substrate.

[0055] In this embodiment, the transmission member 34 includes:

[0056] A toothed ring 342 fixed to the inner wall of the drying chamber 2.

[0057] A transmission gear 341 fixed to one end of the fan shaft 332. The tooth surface of the transmission gear 341 meshes with the tooth surface inside the toothed ring 342, and all the transmission gears 341 are located inside the toothed ring 342. This is to ensure that the blowing member 33 is always in operation during its revolution, continuously guiding hot air to the top of the COB packaging substrate during the curing process of the glue on the COB packaging substrate, greatly increasing the probability of hot air contacting the bottom of the COB packaging substrate and making it evenly heated. This can not only improve the glue curing efficiency but also greatly reduce the influence of external factors on the quality of increasing hot air and the COB packaging substrate.

[0058] The above are only the preferred embodiments of the present invention. The parts not described in the present invention can be implemented by adopting or referring to the existing technologies. Of course, the above description is not a limitation to the present invention, and the present invention is not limited to the above examples. Any changes, modifications, additions or substitutions made by those skilled in the art within the scope of the essence of the present invention shall also fall within the protection scope of the present invention.

Claims

1. A curing drying box for COB packaging substrates, comprising a drying box body (1) and a storage assembly (3) rotatably connected to a drying chamber (2) disposed in the drying box body (1), wherein the drying box body (1) is provided with a driving part (4) for driving the storage assembly (3) to rotate, characterized in that: The storage component (3) comprises: Rotating a support member (31) disposed in the drying chamber (2); Rotating a plurality of placement members (32) disposed in the support member (31) and used for supporting the packaging substrate; A blowing member (33) for introducing hot air into the drying chamber (2); A transmission member (34) for linkage between the driving portion (4) and the blowing member (33); The object placement member (32) comprises a shaft sleeve (321) which is relatively rotatably arranged inside the support member (31); The blowing member (33) comprises: a fan shaft (332) rotatably connected to a through hole (331) provided on the shaft sleeve (321); A plurality of fan blades (333) are transversely fixed on the fan shaft (332) and are used to move hot air.

2. The curing and drying oven for COB packaging substrate according to claim 1, characterized in that: The support member (31) comprises: Transversely rotating a support shaft (311) disposed in the drying chamber (2); A support plate (312) is relatively fixed on the support shaft (311).

3. The curing and drying oven for COB packaging substrate according to claim 2, characterized in that: The shaft sleeve (321) is rotatably mounted on the support plate (312), and one end of the fan shaft (332) passes through the through hole (331) and extends between the support plate (312) and the inner wall of the drying chamber (2).

4. The curing and drying oven for COB packaging substrate according to claim 3, characterized in that: The object placement element (32) further comprises: A U-shaped frame (322) fixed between the two shaft sleeves (321) and used for supporting the packaging substrate, wherein the U-shaped frame (322) is provided with a through groove (323); A plurality of support rods (324) fixed in the through slot (323); A taking slot (325) is provided on the U-shaped frame (322) for taking the packaging substrate.

5. The curing and drying oven for COB packaging substrate according to claim 4, characterized in that: The fan shaft (332) and the shaft sleeve (321) are in a coaxial relationship, and the distance between the fan shaft (332) and the U-shaped frame (322) is greater than the width of the fan blade (333).

6. The curing and drying oven for COB packaging substrate according to claim 5, characterized in that: The transmission member (34) comprises: A gear ring (342) fixed on the inner wall of the drying chamber (2); A transmission tooth (341) is fixed to one end of the fan shaft (332), and a tooth surface of the transmission tooth (341) meshes with a tooth surface inside the gear ring (342).

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