COB packaging yield optical detection device and method thereof

Abstract

The invention discloses a COB packaging yield optical detection device and method, and relates to the technical field of COB detection, the COB packaging yield optical detection device comprises an optical detector, a feeding manipulator and a movable self-positioning assembly, and the self-positioning assembly is used for positioning a to-be-detected piece; wherein the self-positioning assembly comprises a base plate, four base barrels distributed in a rectangular shape are fixed to the base plate, rotating rods are rotationally arranged in the base barrels, a positioning assembly is installed at one end of each rotating rod, a telescopic cylinder is hinged to the other end of each rotating rod, the telescopic cylinders are further hinged to the base plate, and a first sealing barrel is embedded in the middle of the base plate; the bottom of the first sealing barrel is communicated with the telescopic cylinder through a pipeline, a gravity piston is arranged in the first sealing barrel in a sealed and sliding mode, gas is filled between the first sealing barrel and the bottom of the gravity piston, the whole process is high in automation degree, and telescopic power of the telescopic cylinder comes from the gravity of the gravity piston, so that the telescopic cylinder is high in automation degree. And the dependence degree on external power equipment is low.

Description

Technical Field

[0001] The present invention relates to the technical field of COB detection, and in particular to a COB packaging yield optical detection device and method thereof. Background Art

[0002] With the rapid development of semiconductor technology, Chip On Board (COB) packaging technology has played an important role in the manufacturing of various electronic devices due to its advantages of high integration, low cost and flexibility. As the market's requirements for product quality and performance become increasingly stringent, how to monitor the yield of COB packaging has become a key issue that needs to be solved urgently.

[0003] Traditional COB packaging yield inspection methods mainly rely on manual visual inspection or simple mechanical inspection. These methods are not only inefficient, but also easily affected by human factors, making it difficult to ensure the accuracy and reliability of the inspection results. In addition, with the continuous advancement of packaging technology, the size and shape of the parts to be inspected are becoming increasingly diverse, and traditional inspection methods are also insufficient in adaptability and flexibility.

[0004] In this context, a device specifically for optical inspection of COB packaging yield has emerged. This type of device uses advanced optical elements and algorithms to achieve optical imaging of parts to be inspected of different shapes and sizes and obtain structural information of the parts to be inspected.

[0005] However, although this new COB packaging yield optical inspection device has made significant progress in improving inspection efficiency and accuracy, it still has shortcomings in how to further improve positioning accuracy and adaptability to adapt to parts to be inspected of different shapes and sizes, and how to improve the degree of automation.

[0006] Specifically, existing optical inspection devices mainly rely on mechanical positioning components when positioning the parts to be inspected. Although these components can meet basic positioning requirements to a certain extent, when dealing with different parts to be inspected, it is necessary to manually replace the positioning components or adjust the positioning parameters, which has poor overall flexibility. This also leads to insufficient overall automation level, making it difficult to achieve seamless integration and collaborative work with other equipment, limiting the overall efficiency and flexibility of the production line.

[0007] Therefore, it is necessary to provide a COB packaging yield optical detection device and method thereof to solve the above problems. Summary of the invention

[0008] In order to solve the above problems, the present invention provides the following technical solutions: a COB packaging yield optical detection device, comprising:

[0009] Two symmetrically arranged rollers, with a belt drivingly connected between the two rollers;

[0010] A track, which is located on the outer peripheral side of the belt, and a plurality of movable seats are slidably connected to the track, and the movable seats are also connected to the belt;

[0011] A self-positioning component, which is fixed on the moving seat and is used to position the part to be detected;

[0012] An optical detector located above the belt;

[0013] A feeding robot, used for supplying the self-positioning assembly with the parts to be inspected;

[0014] Among them, the self-positioning component includes a base plate, on which four base cylinders distributed in a rectangular shape are fixed, a rotating rod is rotatably arranged in the base cylinder, a positioning component is installed at one end of the rotating rod, and a telescopic cylinder is hinged at the other end, and the telescopic cylinder is also hinged to the base plate, and a first sealing cylinder is embedded in the middle of the base plate, the bottom of the first sealing cylinder is connected to the telescopic cylinder by a pipeline, a gravity piston is sealingly and slidingly arranged inside the first sealing cylinder, and gas is filled between the first sealing cylinder and the bottom of the gravity piston.

[0015] Further, preferably, the telescopic cylinder comprises a piston cylinder and a piston rod, wherein a connecting hole is opened on the side of the piston cylinder for connecting with the pipeline, one end of the piston rod is sealingly and slidingly connected to the piston cylinder, and the other end extends out of the piston cylinder.

[0016] Further, preferably, the top of the first sealing cylinder is used to support the part to be detected;

[0017] A buffer spring is fixed to the inner bottom of the first sealing cylinder.

[0018] Further, preferably, a magnetic attraction component is fixed to the inner top of the first sealing cylinder, and when the gravity piston is in contact with the magnetic attraction component, the gravity piston can be magnetically positioned by the magnetic attraction component.

[0019] Further, preferably, the magnetic attraction assembly includes a second sealing cylinder and a magnetic floating plate, wherein the second sealing cylinder is fixed to the inner top of the first sealing cylinder, the second sealing cylinder is filled with liquid, the magnetic floating plate is arranged in the second sealing cylinder and can float on the liquid, and a through hole is also opened on the magnetic floating plate.

[0020] Further, preferably, the positioning component comprises:

[0021] an arm body, one end of which is connected to the rotating rod;

[0022] A first positioning rod, which is fixed to an end of the arm body away from the rotating rod;

[0023] The first positioning head is sleeved on the outside of the first positioning rod and has elasticity.

[0024] Further, as a preference, the positioning assembly also includes two arc-shaped slots and a movable positioning assembly, the two slots are distributed at one end of the arm body away from the rotating rod, the movable positioning assembly is clamped on one of the slots, and the radius of one of the slots is consistent with the rotation radius of the first positioning rod.

[0025] Further, preferably, the movable positioning component comprises:

[0026] A movable card member, a card head corresponding to the card slot is fixed at the bottom of the movable card member;

[0027] A second positioning rod, which is fixed to the bottom of the movable clamp;

[0028] The second positioning head is slidably sleeved on the outside of the second positioning rod, and a return spring is connected between the second positioning head and the second positioning rod.

[0029] A COB package yield optical detection method comprises the following steps:

[0030] Step 1: The loading robot grabs the part to be tested from the preset position and places it on the first sealing cylinder on the moving seat;

[0031] Step 2: The gravity piston in the first sealing cylinder descends, affecting the pressure of the telescopic cylinder through the pipeline, thereby driving the rotating rod to rotate, and then adapting to the shape and size of the to-be-detected part through the positioning assembly;

[0032] Step 3: The belt drives the moving seat to slide on the track, so that the part to be inspected moves along a predetermined path to the bottom of the optical detector;

[0033] Step 4: The optical detector performs optical inspection on the part to be inspected to determine its packaging yield;

[0034] Step 5: When the part to be inspected moves to the lower position of the belt, the gravity piston adjusts its position under the action of gravity, affects the pressure of the telescopic cylinder through the pipeline, and drives the rotating rod to rotate. At this time, the positioning assembly releases the part to be inspected.

[0035] Compared with the prior art, the present invention provides a COB packaging yield optical detection device and method thereof, which has the following beneficial effects:

[0036] In the present invention, the entire process of optical inspection of COB packaging yield is highly automated, wherein the telescopic power of the telescopic cylinder comes from the gravity of the gravity piston itself, and therefore, the degree of dependence on external power equipment is low, and there is no need to configure complex electrical circuits.

[0037] In the present invention, the positioning assembly has high positioning flexibility. When the part to be detected is rectangular, the movable positioning assembly and the first positioning head jointly limit its right-angled sides to achieve precise positioning. When the part to be detected is arc-shaped, only the elastic characteristics of the first positioning head are used to tightly fit the arc edge for positioning. At the same time, the movable positioning assembly can assist in pressing to ensure stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 This is a schematic diagram of the main structure of a COB packaging yield optical detection device;

[0039] Figure 2 It is a schematic cross-sectional structure diagram of a self-positioning component in a COB packaging yield optical detection device;

[0040] Figure 3 It is a schematic diagram of the three-dimensional structure of a self-positioning component in a COB packaging yield optical detection device;

[0041] Figure 4 It is a schematic diagram of a half-section structure of a telescopic cylinder in a COB packaging yield optical detection device;

[0042] Figure 5 It is a schematic diagram of the three-dimensional structure of a positioning component in a COB packaging yield optical detection device;

[0043] Figure 6 It is a schematic cross-sectional structure diagram of a magnetic attraction component in a COB packaging yield optical detection device;

[0044] In the figure: 1. roller body; 2. belt; 3. track; 4. moving seat; 5. self-positioning assembly; 6. optical detector; 7. unloading conveyor belt; 8. loading robot; 51. base plate; 52. support leg; 53. base cylinder; 54. rotating rod; 55. positioning assembly; 56. telescopic cylinder; 57. first sealing cylinder; 58. pipeline; 59. magnetic suction assembly; 510. gravity piston; 511. buffer spring; 551. arm body; 552. first positioning rod; 553. first positioning head; 554. card slot; 555. movable card; 556. second positioning rod; 557. second positioning head; 561. piston cylinder; 562. piston rod; 563. connecting hole; 591. second sealing cylinder; 592. magnetic floating plate; 593. through hole. DETAILED DESCRIPTION

[0045] The terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned description of the drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequential order. It should be understood that the terms used in this way can be interchangeable under appropriate circumstances, which is merely a way of distinguishing the objects of the same attributes when describing them in the embodiments of the present application. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, so that the process, method, system, product or equipment comprising a series of units need not be limited to those units, but may include other units that are not clearly listed or inherent to these processes, methods, products or equipment.

[0046] Example: Please refer to Figure 1-Figure 6 In an embodiment of the present invention, a COB packaging yield optical detection device is provided, comprising:

[0047] Two roller bodies 1 are symmetrically arranged, and a belt 2 is connected between the two roller bodies 1;

[0048] A track 3, which is located on the outer peripheral side of the belt 2, and a plurality of movable seats 4 are slidably connected to the track 3, and the movable seats 4 are also connected to the belt 2;

[0049] A self-positioning component 5, which is fixed on the moving seat 4 and is used to position the part to be detected;

[0050] An optical detector 6, which is located above the belt 2;

[0051] A feeding robot 8, used for supplying the self-positioning assembly 5 with the parts to be detected;

[0052] A material unloading conveyor belt 7, which is located below the belt 2;

[0053] Among them, the self-positioning component 5 includes a base plate 51, the bottom of which is fixed to the movable seat 4 by means of legs 52, four base cylinders 53 distributed in a rectangular shape are fixed to the base plate 51, a rotating rod 54 is rotatably arranged in the base cylinder 53, a positioning component 55 is installed at one end of the rotating rod 54, and a telescopic cylinder 56 is hinged at the other end, and the telescopic cylinder 56 is also hinged to the base plate 51, a first sealing cylinder 57 is embedded in the middle of the base plate 51, the bottom of the first sealing cylinder 57 is connected to the telescopic cylinder 56 by means of a pipeline 58, a gravity piston 510 is sealingly and slidably arranged inside the first sealing cylinder 57, and gas is filled between the first sealing cylinder 57 and the bottom of the gravity piston 510.

[0054] Therefore, the implementation includes the following steps:

[0055] Step 1: The loading robot 8 grabs the part to be tested from the preset position and places it on the first sealing cylinder 57 on the moving seat 4;

[0056] Step 2: The gravity piston 510 in the first sealing cylinder 57 descends, affecting the pressure of the telescopic cylinder 56 through the pipeline 58, thereby driving the rotating rod 54 to rotate, and then adapting to the shape and size of the to-be-detected part through the positioning assembly 55;

[0057] Step 3: The belt 2 drives the movable seat 4 to slide on the track 3, so that the object to be inspected moves along a predetermined path to below the optical detector 6;

[0058] Step 4: The optical detector 6 performs optical inspection on the inspected component to determine its packaging yield;

[0059] Step 5: When the part to be detected moves to the lower position of the belt 2, the gravity piston 510 adjusts its position under the action of gravity, affects the pressure of the telescopic cylinder 56 through the pipeline 58, and drives the rotating rod 54 to rotate. At this time, the positioning assembly 55 releases the part to be detected.

[0060] In the process of positioning the part to be inspected, in order to further accurately control the descending timing of the gravity piston 510, in this embodiment, a magnetic suction component 59 is fixed to the inner top of the first sealing cylinder 57. When the gravity piston 510 contacts the magnetic suction component 59, the gravity piston 510 can be magnetically positioned by the magnetic suction component 59.

[0061] Based on this, during implementation, the above steps 1 and 2 are adjusted. Specifically,

[0062] Step 1: The loading robot 8 grabs the part to be tested from the preset position and places it on the first sealing cylinder 57 on the moving seat 4. The gravity piston 510 is magnetically attracted by the magnetic attraction component 59 and positioned at the inner top of the first sealing cylinder 57 to remain stationary.

[0063] Step 2: The loading robot 8 slightly oscillates the first sealing cylinder 57. The oscillating action enables the gravity piston 510 to overcome the magnetic force of the magnetic attraction assembly 59 and disengage from the magnetic attraction positioning. After disengaging from the magnetic attraction, the gravity piston 510 begins to move downward under the action of gravity, affecting the pressure of the telescopic cylinder 56 through the pipeline 58, thereby driving the rotating rod 54 to rotate, and then adapting to the shape and size of the part to be inspected through the positioning assembly 55.

[0064] That is to say, in this embodiment, the adaptive positioning of the object to be detected is achieved through the coordinated action of the gravity piston 510, the telescopic cylinder 56 and the rotating rod 54, and the triggering mechanism of the magnetic attraction component 59.

[0065] The combined use of the belt 2 and the moving seat 4, as well as the precise operation of the loading manipulator 8, achieves continuous and efficient transmission and detection of the parts to be detected. The entire process has a high degree of automation, and the telescopic power source of the telescopic cylinder 56 is the gravity of the gravity piston 510 itself, which has a low degree of dependence on external power equipment, so there is no need to configure complex electrical circuits.

[0066] In this embodiment, the telescopic cylinder 56 includes a piston cylinder 561 and a piston rod 562, wherein a connecting hole 563 is opened on the side of the piston cylinder 561 for connecting with the pipeline 58, one end of the piston rod 562 is sealed and slidably connected to the piston cylinder 561, and the other end extends out of the piston cylinder 561.

[0067] Then, when the gas inside the first sealing cylinder 57 is compressed and transmitted to the connecting hole 563 of the piston cylinder 561 through the pipeline 58, the pressure inside the piston cylinder 561 will change, thereby pushing the piston rod 562 to slide inside the piston cylinder 561. The sliding of the piston rod 562 will drive the rotating rod 54 to rotate.

[0068] Furthermore, the top of the first sealing cylinder 57 is used to support the part to be detected;

[0069] A buffer spring 511 is fixed to the inner bottom of the first sealing cylinder 57 .

[0070] The top of the first sealing cylinder 57 is designed to support the detected object. When the detected object is placed on the first sealing cylinder 57 by the feeding robot 8, the top thereof provides a stable supporting surface to ensure the stability and accuracy of the detected object during the detection process.

[0071] The main function of the inner bottom buffer spring 511 of the first sealing cylinder 57 is to provide buffering when the gravity piston 510 moves downward, thereby reducing the direct impact between the gravity piston 510 and the bottom of the first sealing cylinder 57 .

[0072] In this embodiment, the magnetic attraction component 59 includes a second sealing cylinder 591 and a magnetic floating plate 592, wherein the second sealing cylinder 591 is fixed to the inner top of the first sealing cylinder 57, the second sealing cylinder 591 is filled with liquid, the magnetic floating plate 592 is arranged in the second sealing cylinder 591 and can float on the liquid, and a through hole 593 is also opened on the magnetic floating plate 592.

[0073] By such arrangement, in step 2, when the gravity piston 510 is separated from the magnetic attraction assembly 59, the magnetic floating plate 592 floats up and can be away from the gravity piston 510, further ensuring the separation effect of the gravity piston 510 and the magnetic attraction assembly 59;

[0074] In addition, when the self-positioning component 5 is located below the belt 2, the magnetic floating plate 592 floats upward, and the gravity piston 510 moves downward, so that the magnetic attraction component 59 and the gravity piston 510 are magnetically attracted again to achieve reset.

[0075] In this embodiment, the positioning component 55 includes:

[0076] An arm body 551, one end of which is connected to the rotating rod 54;

[0077] A first positioning rod 552, which is fixed to one end of the arm 551 away from the rotating rod 54;

[0078] The first positioning head 553 is sleeved on the outside of the first positioning rod 552 and has elasticity.

[0079] In addition, the positioning assembly 55 also includes two arc-shaped slots 554 and a movable positioning assembly. The two slots 554 are distributed at one end of the arm body 551 away from the rotating rod 54. The movable positioning assembly is clamped on one of the slots 554, and the radius of one of the slots 554 is consistent with the rotation radius of the first positioning rod 552.

[0080] The two slots 554 are named as the first slot and the second slot respectively, wherein the radius of the first slot is consistent with the rotation radius of the first positioning rod 552;

[0081] When the to-be-detected piece is rectangular, the first positioning head 553 and the movable positioning assembly jointly limit the right-angled sides of the rectangular to-be-detected piece to achieve positioning.

[0082] When the detected part is arc-shaped, only the elastic property of the first positioning head 553 is used to closely fit the arc edge of the detected part to achieve positioning. At this time, the movable positioning component is clamped in the first clamping slot, and the movable positioning component can be used to assist in pressing the detected part downward to ensure its stability during the detection process.

[0083] In this embodiment, the movable positioning component includes:

[0084] A movable clamping member 555, a clamping head corresponding to the clamping slot 554 is fixed at the bottom thereof;

[0085] A second positioning rod 556, which is fixed to the bottom of the movable clamp 555;

[0086] The second positioning head 557 is slidably sleeved on the outside of the second positioning rod 556 , and a return spring is connected between the second positioning head 557 and the second positioning rod 556 .

[0087] It should be noted that, during the positioning process of the arc-shaped part to be detected, the auxiliary pressing function of the second positioning head 557 is not the main positioning method, but serves as an additional stability support.

[0088] In this embodiment, a COB package yield optical detection method is also provided, comprising the following steps:

[0089] Step 1: The loading robot 8 grabs the part to be tested from the preset position and places it on the first sealing cylinder 57 on the moving seat 4;

[0090] Step 2: The gravity piston 510 in the first sealing cylinder 57 descends, affecting the pressure of the telescopic cylinder 56 through the pipeline 58, thereby driving the rotating rod 54 to rotate, and then adapting to the shape and size of the to-be-detected part through the positioning assembly 55;

[0091] Step 3: The belt 2 drives the movable seat 4 to slide on the track 3, so that the object to be inspected moves along a predetermined path to below the optical detector 6;

[0092] Step 4: The optical detector 6 performs optical inspection on the inspected part to determine its packaging yield. The optical detector 6 provides a high-precision optical inspection method to ensure the reliability of the inspection result.

[0093] Step 5: When the part to be detected moves to the lower position of the belt 2, the gravity piston 510 adjusts its position under the action of gravity, affects the pressure of the telescopic cylinder 56 through the pipeline 58, and drives the rotating rod 54 to rotate. At this time, the positioning assembly 55 releases the part to be detected.

[0094] The entire detection process is almost fully automated, reducing the cost and complexity of manual operations.

[0095] What is described above is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A COB packaging yield optical detection device, characterized in that: include: Two symmetrically arranged roller bodies (1), with a belt (2) drivingly connected between the two roller bodies (1); A track (3) located on the outer peripheral side of the belt (2), and a plurality of movable seats (4) are slidably connected to the track (3), and the movable seats (4) are also connected to the belt (2); A self-positioning component (5) fixed on the movable seat (4) and used for positioning the part to be detected; An optical detector (6) located above the belt (2); A feeding robot (8), used for supplying the self-positioning component (5) with the parts to be inspected; The self-positioning assembly (5) comprises a base plate (51), four base cylinders (53) arranged in a rectangular shape are fixed on the base plate (51), a rotating rod (54) is rotatably arranged in the base cylinder (53), a positioning assembly (55) is installed at one end of the rotating rod (54), and a telescopic cylinder (56) is hingedly connected to the other end, and the telescopic cylinder (56) is also hingedly connected to the base plate (51), a first sealing cylinder (57) is embedded in the middle of the base plate (51), the bottom of the first sealing cylinder (57) is connected to the telescopic cylinder (56) by a pipeline (58), a gravity piston (510) is sealingly slidably arranged inside the first sealing cylinder (57), and gas is filled between the first sealing cylinder (57) and the bottom of the gravity piston (510).

2. The COB packaging yield optical detection device according to claim 1, characterized in that: The telescopic cylinder (56) comprises a piston cylinder (561) and a piston rod (562), wherein a connecting hole (563) is provided on the side of the piston cylinder (561) for communicating with the pipeline (58), and one end of the piston rod (562) is sealingly and slidably connected to the piston cylinder (561), and the other end extends out of the piston cylinder (561).

3. The COB packaging yield optical detection device according to claim 1, characterized in that: The top of the first sealing cylinder (57) is used to support the object to be detected; A buffer spring (511) is fixed to the inner bottom of the first sealing cylinder (57).

4. The COB packaging yield optical detection device according to claim 1, characterized in that: A magnetic attraction component (59) is fixed to the inner top of the first sealing cylinder (57); when the gravity piston (510) is in contact with the magnetic attraction component (59), the gravity piston (510) can be magnetically positioned by the magnetic attraction component (59).

5. The COB packaging yield optical detection device according to claim 4, characterized in that: The magnetic attraction component (59) comprises a second sealing cylinder (591) and a magnetic floating plate (592), wherein the second sealing cylinder (591) is fixed to the inner top of the first sealing cylinder (57), the second sealing cylinder (591) is filled with liquid, the magnetic floating plate (592) is arranged in the second sealing cylinder (591) and can float on the liquid, and the magnetic floating plate (592) is also provided with a through hole (593).

6. The COB packaging yield optical detection device according to claim 1, characterized in that: The positioning component (55) comprises: An arm body (551), one end of which is connected to the rotating rod (54); A first positioning rod (552) fixed to an end of the arm body (551) away from the rotating rod (54); The first positioning head (553) is sleeved on the outside of the first positioning rod (552) and has elasticity.

7. The COB packaging yield optical detection device according to claim 6, characterized in that: The positioning assembly (55) further comprises two arc-shaped slots (554) and a movable positioning assembly, wherein the two slots (554) are distributed at one end of the arm body (551) away from the rotating rod (54), and the movable positioning assembly is mounted on one of the slots (554), and the radius of one of the slots (554) is consistent with the rotation radius of the first positioning rod (552).

8. The COB packaging yield optical detection device according to claim 7, characterized in that: The activity positioning component comprises: A movable clamping member (555), a clamping head corresponding to the clamping slot (554) being fixed at the bottom thereof; A second positioning rod (556) fixed to the bottom of the movable clamp (555); The second positioning head (557) is slidably sleeved on the outside of the second positioning rod (556), and a return spring is connected between the second positioning head (557) and the second positioning rod (556).

9. A COB packaging yield optical detection method, which uses the COB packaging yield optical detection device as claimed in any one of claims 1 to 8, characterized in that: The steps include: Step 1: The loading robot (8) grabs the part to be tested from a preset position and places it on the first sealing cylinder (57) on the movable seat (4); Step 2: The gravity piston (510) in the first sealing cylinder (57) descends, affecting the pressure of the telescopic cylinder (56) through the pipeline (58), thereby driving the rotating rod (54) to rotate, and then adapting to the shape and size of the to-be-detected part through the positioning assembly (55); Step 3: The belt (2) drives the movable seat (4) to slide on the track (3), so that the object to be inspected moves along a predetermined path to the bottom of the optical detector (6); Step 4: The optical detector (6) performs optical inspection on the inspected part to determine its packaging yield; Step 5: When the part to be detected moves to the lower position of the belt (2), the gravity piston (510) adjusts its position under the action of gravity, affects the pressure of the telescopic cylinder (56) through the pipeline (58), thereby driving the rotating rod (54) to rotate. At this time, the positioning assembly (55) releases the part to be detected.

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