A COB packaging yield optical detection device and method thereof

Abstract

The application discloses a COB packaging yield optical detection device and method thereof, and relates to the technical field of COB detection.The device comprises an optical detector, a feeding manipulator and a movable self-positioning assembly, wherein the self-positioning assembly is used for positioning a piece to be detected; the self-positioning assembly comprises a base plate, four base cylinders in a rectangular distribution are fixed on the base plate, a rotating rod is rotatably arranged in the base cylinder, a positioning assembly is arranged at one end of the rotating rod, an expansion cylinder is hingedly connected to the other end of the rotating rod, the expansion cylinder is also hingedly connected to the base plate, a first sealing cylinder is embedded in the middle of the base plate, a pipeline is arranged at the bottom of the first sealing cylinder and is communicated with the expansion cylinder, a gravity piston is slidably arranged in the first sealing cylinder, and gas is filled between the first sealing cylinder and the bottom of the gravity piston.The whole process is highly automated, the expansion power of the expansion cylinder is derived from the gravity of the gravity piston, and the degree of dependence on external power equipment is low.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of COB detection, and particularly relates to a COB packaging yield optical detection device and a method thereof. BACKGROUND

[0002] With the rapid development of semiconductor technology, the Chip On Board (COB) packaging technology occupies an important position in the manufacturing of various electronic devices due to its high integration, low cost and flexibility. With the increasing strictness of market requirements for product quality and performance, how to monitor the yield of COB packaging has become a key problem to be solved.

[0003] The traditional COB packaging yield detection means mainly relies on manual inspection or simple mechanical detection. These methods not only have low detection efficiency, but also are easily affected by human factors, resulting in difficulty in guaranteeing the accuracy and reliability of the detection results. In addition, with the continuous progress of packaging technology, the size and shape of the detected parts are increasingly diversified, and the traditional detection means also have deficiencies in adaptability and flexibility.

[0004] Under this background, a device for optical detection of COB packaging yield has emerged as the times require. This kind of device uses advanced optical elements and algorithms to realize optical imaging of different shapes and sizes of detected parts and obtain the structural information of the detected parts.

[0005] However, although this new type of COB packaging yield optical detection device has made significant progress in improving detection efficiency and accuracy, it still has deficiencies in further improving positioning accuracy and adaptability to adapt to different shapes and sizes of detected parts and in improving the degree of automation.

[0006] Specifically, the existing optical detection device mainly relies on mechanical positioning components when positioning the detected parts. Although these components can meet the basic positioning requirements to a certain extent, they need to be manually replaced or adjusted when dealing with different detected parts, which has poor flexibility and also leads to insufficient automation level, difficulty in realizing seamless integration and cooperation with other equipment, and limitation of the overall efficiency and flexibility of the production line.

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

[0008] To solve the above problems, the present application provides the following technical solutions: a COB packaging yield optical detection device, comprising:

[0009] Two roller bodies arranged symmetrically, and a belt transmission connected between the two roller bodies;

[0010] A track is located on the outer peripheral side of the belt, and a plurality of moving seats are slidingly connected on the track and connected with the belt;

[0011] A self-positioning assembly is fixed on the moving seat for positioning the detection piece;

[0012] An optical detector is located above the belt;

[0013] A feeding manipulator is used to supply the detection piece for the self-positioning assembly;

[0014] The self-positioning assembly includes a base plate, four base cylinders arranged in a rectangular shape are fixed on the base plate, a rotating rod is rotatably arranged in the base cylinder, a positioning assembly is installed at one end of the rotating rod, and a telescopic cylinder is hingedly connected at the other end of the rotating rod, the telescopic cylinder is also hingedly connected with the base plate, a first sealing cylinder is embedded in the middle of the base plate, the bottom of the first sealing cylinder is connected with the telescopic cylinder through a pipeline, a gravity piston is slidingly arranged in the first sealing cylinder, and gas is filled between the first sealing cylinder and the bottom of the gravity piston.

[0015] Further, as a preferred, the telescopic cylinder includes a piston cylinder and a piston rod, a connecting hole is formed in the side of the piston cylinder for communication with the pipeline, one end of the piston rod is connected with the piston cylinder in a sealing sliding manner, and the other end of the piston rod extends out of the piston cylinder.

[0016] Further, as a preferred, the top of the first sealing cylinder is used to support the detection piece;

[0017] The inner bottom of the first sealing cylinder is fixed with a buffer spring.

[0018] Further, as a preferred, the inner top of the first sealing cylinder is fixed with a magnetic assembly, when the gravity piston contacts with the magnetic assembly, the gravity piston can be magnetically positioned by the magnetic assembly.

[0019] Further, as a preferred, the magnetic assembly includes a second sealing cylinder and a magnetic floating plate, the second sealing cylinder is fixed on 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 formed in the magnetic floating plate.

[0020] Further, as a preferred, the positioning assembly includes:

[0021] An arm body is connected with the rotating rod at one end;

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

[0023] A first positioning head is sleeved outside the first positioning rod and has elasticity.

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

[0025] Further, as a preference, the movable positioning assembly comprises:

[0026] A movable clamping piece has a clamping head corresponding to the clamping groove fixed at the bottom;

[0027] A second positioning rod is fixed to the bottom of the movable clamping piece;

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

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

[0030] Step one: a feeding manipulator grabs a to-be-detected piece from a preset position and places it on a first sealing cylinder on a moving seat;

[0031] Step two: a gravity piston in the first sealing cylinder is lowered to affect the pressure of a telescopic cylinder through a pipeline, so that the rotating rod is driven to rotate, and then the positioning assembly is adapted to the shape and size of the to-be-detected piece;

[0032] Step three: the moving seat is slid on a track by a belt, so that the to-be-detected piece moves along a predetermined path to below an optical detector;

[0033] Step four: the optical detector performs optical detection on the to-be-detected piece to determine the packaging yield thereof;

[0034] Step five: when the to-be-detected piece moves to below the belt, the gravity piston adjusts the position under the action of gravity, affects the pressure of the telescopic cylinder through the pipeline, so that the rotating rod is driven to rotate, and at this time, the positioning assembly releases the to-be-detected piece.

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

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

[0037] In the present invention, the positioning flexibility of the positioning component is relatively high. When the part to be detected is rectangular, the movable positioning component 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, and the movable positioning component 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 package yield optical inspection device;

[0039] Figure 2 This is a schematic cross-sectional view of a self-positioning component in a COB package yield optical inspection device;

[0040] Figure 3 A schematic diagram of the three-dimensional structure of a self-positioning component in a COB package yield optical inspection device;

[0041] Figure 4 This is a schematic diagram of a half-section structure of a telescopic cylinder in a COB package yield optical inspection device;

[0042] Figure 5 This is a schematic diagram of the three-dimensional structure of a positioning component in a COB package yield optical inspection device;

[0043] Figure 6 This is a schematic cross-sectional view of a magnetic component in a COB package yield optical inspection device;

[0044] In the figure: 1. roller body; 2. belt; 3. track; 4. movable 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 assembly; 510. gravity piston; 511. buffer spring; 551. arm body; 552. first positioning rod; 553. first positioning head; 554. slot; 555. movable clamp; 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, and this 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 Figures 1-6 In an embodiment of the present invention, a COB package yield optical detection device is provided, comprising:

[0047] Two symmetrically arranged rollers 1, with a belt 2 drivingly connected between the two rollers 1;

[0048] a track 3, which is located on the outer periphery 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 movable base 4 and is used to position the part to be inspected;

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

[0051] A loading robot 8 is used to supply the self-positioning component 5 with the parts to be tested;

[0052] A feeding 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 the base plate 51 is fixed to the movable seat 4 by means of legs 52, four rectangularly distributed base cylinders 53 are fixed on the base plate 51, a rotating rod 54 is rotatably arranged in the base cylinder 53, one end of the rotating rod 54 is installed with a positioning component 55, and the other end is hinged with a telescopic cylinder 56, and the telescopic cylinder 56 is also hinged to the base plate 51, and a first sealing cylinder 57 is embedded in the middle of the base plate 51, and the bottom of the first sealing cylinder 57 is connected to the telescopic cylinder 56 by a pipeline 58, and a gravity piston 510 is provided in the interior of the first sealing cylinder 57 for sealing and sliding, 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 movable base 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 object to be inspected through the positioning assembly 55;

[0057] Step 3: The belt 2 drives the movable base 4 to slide on the track 3, so that the part to be inspected moves along the predetermined path to the bottom of the optical detector 6;

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

[0059] Step 5: When the part to be inspected moves to the lower position of the belt 2, the gravity piston 510 adjusts its position 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. At this time, the positioning assembly 55 releases the part to be inspected.

[0060] In the process of positioning the part to be tested, in order to further accurately control the descending timing of the gravity piston 510, in this embodiment, a magnetic component 59 is fixed to the inner top of the first sealing cylinder 57. When the gravity piston 510 contacts the magnetic component 59, the gravity piston 510 can be magnetically positioned by the magnetic 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 inspected from the preset position and places it on the first sealing cylinder 57 on the movable base 4. The gravity piston 510 is magnetically attracted by the magnetic assembly 59 and positioned at the inner top of the first sealing cylinder 57, and remains stationary.

[0063] Step 2: The loading robot 8 slightly oscillates the first sealing cylinder 57. The oscillating action causes the gravity piston 510 to overcome the magnetic force of the magnetic attraction component 59 and disengage from the magnetic 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 component 55.

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

[0065] The combined use of belt 2 and movable base 4, along with the precise operation of loading robot 8, enables continuous and efficient transport and testing of parts to be inspected. The entire process is highly automated, and the telescopic cylinder 56 is powered by the gravity of the gravity piston 510, minimizing reliance on external power equipment and eliminating the need for complex electrical wiring.

[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 transferred to the connecting hole 563 of the piston cylinder 561 through the pipeline 58, the pressure inside the piston cylinder 561 changes, thereby pushing the piston rod 562 to slide in the piston cylinder 561. The sliding of the piston rod 562 drives the rotating rod 54 to rotate.

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

[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 test piece. When the test piece is placed on the first sealing cylinder 57 by the loading robot 8, the top provides a stable support surface to ensure the stability and accuracy of the test piece during the test.

[0071] The main function of the buffer spring 511 at the inner bottom of the first sealing cylinder 57 is to provide a buffer 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 provided on the magnetic floating plate 592.

[0073] By such an arrangement, in step 2, when the gravity piston 510 is separated from the magnetic assembly 59, the magnetic floating plate 592 floats upward and is able to move away from the gravity piston 510, further ensuring the separation effect of the gravity piston 510 and the magnetic 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 551, one end of which is connected to the rotating rod 54;

[0077] a first positioning rod 552 , fixed to an 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 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 piece to be detected is rectangular, the first positioning head 553 and the movable positioning assembly jointly limit the right-angled sides of the rectangular piece to be detected to achieve positioning.

[0082] When the part to be inspected is curved, only the elastic properties of the first positioning head 553 are utilized to closely fit the curved edge of the part to be inspected to achieve positioning. In this case, the movable positioning assembly is locked in the first slot and can be used to assist in pressing the part to be inspected downward to ensure its stability during the inspection process.

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

[0084] The movable clamping member 555 has a clamping head fixed at the bottom thereof corresponding to the clamping slot 554;

[0085] a second positioning rod 556 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 inspected, 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 movable base 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 object to be inspected through the positioning assembly 55;

[0091] Step 3: The belt 2 drives the movable base 4 to slide on the track 3, so that the part to be inspected moves along the predetermined path to the bottom of the optical detector 6;

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

[0093] Step 5: When the part to be inspected moves to the lower position of the belt 2, the gravity piston 510 adjusts its position 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. At this time, the positioning assembly 55 releases the part to be inspected.

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

[0095] The above is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with this technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solutions and inventive concepts of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A COB package 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) 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); A self-positioning component (5) fixed on the movable seat (4) for positioning the part to be inspected; an optical detector (6) located above the belt (2); A feeding robot (8) for supplying the self-positioning component (5) with the parts to be inspected; The self-positioning assembly (5) comprises a base plate (51), four rectangularly distributed base cylinders (53) are fixed on the base plate (51), a rotating rod (54) is rotatably provided 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 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) via a pipeline (58), a gravity piston (510) is provided in a sealing and sliding manner 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 package yield optical detection device according to claim 1, characterized in that: The telescopic cylinder (56) includes 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 sealed and slidably connected to the piston cylinder (561), and the other end extends out of the piston cylinder (561).

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

4. The COB package 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) contacts the magnetic attraction component (59), the gravity piston (510) can be magnetically positioned by the magnetic attraction component (59).

5. The COB package yield optical detection device according to claim 4, characterized in that: The magnetic attraction assembly (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 the magnetic floating plate (592) is also provided with a through hole (593).

6. The COB package 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 (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 package 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. The two slots (554) are distributed at one end of the arm (551) away from the rotating rod (54). 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 package yield optical detection device according to claim 7, characterized in that: The active positioning component includes: A movable clamping member (555) having a clamping head corresponding to the clamping slot (554) fixed at its bottom; 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 package yield optical detection method, which uses the COB package yield optical detection device according to 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-tested 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 part 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 part to be inspected to determine its packaging yield; Step 5: When the part to be inspected moves to the lower position of the belt (2), the gravity piston (510) adjusts its position 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. At this time, the positioning assembly (55) releases the part to be inspected.

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