Device and method for testing peel strength of copper foil of copper-clad plate

Abstract

The invention relates to a copper-clad plate copper foil peel strength testing device and testing method, and belongs to the technical field of copper-clad plate testing, the copper-clad plate copper foil peel strength testing device comprises a horizontally arranged track, and a limiting piece is arranged above the track; the pushing assembly is arranged at the front end of the track; the grooving assembly is arranged above the track; the traction assembly is arranged at the rear end of the track and comprises a connecting rod which is movably arranged in the vertical direction, a tension meter is arranged at the upper end of the connecting rod, and a mounting bracket is arranged at the top of the tension meter; the clamping assembly comprises a rectangular pipe, a bolt vertically penetrates through a top plate of the rectangular pipe, a spring is arranged at the top of the bolt, the rectangular pipe is rotationally arranged on the mounting support through a connecting shaft on the side face, and a sensor for detecting the position of the bolt is arranged on the rectangular pipe. According to the scheme, the automation degree is higher, the test efficiency can be improved, and copper foil breakage caused by too large clamping force can be effectively prevented.

Description

Technical Field

[0001] The present invention belongs to the technical field of copper clad laminate testing, and particularly relates to a device and a method for testing the copper foil peel strength of a copper clad laminate. Background Art

[0002] A copper clad laminate is usually formed by bonding a copper foil to a substrate using a prepreg. Copper clad laminates are mainly used for manufacturing printed circuit boards. During the production process of the copper foil, it is necessary to test the peel resistance of the copper foil. The magnitude of the copper foil peel force directly affects the quality and service life of the circuit board.

[0003] The existing testing devices mainly include the following steps when testing the peel strength of the copper foil: Making a sample. The operator needs to use a blade to peel off a section of the copper foil at one end of the copper clad laminate sample to facilitate the clamping of the copper foil by the fixture; Fixing the sample. The copper clad laminate is pasted onto the fixed tabletop of the testing device using double-sided tape or an adhesive, with the copper foil facing upwards. This process is also manually operated. The stability of the copper clad laminate sample fixed in this way is generally average. There is a risk of displacement and detachment of the sample during the testing process, and the residual glue on the tabletop needs to be cleaned each time a test is performed, increasing the auxiliary workload of the test; Clamping the copper foil. The operator manually introduces the pre-peeled copper foil at the end of the sample into the fixture and clamps the copper foil using the fixture; and most of the existing fixtures directly press both sides of the copper foil using two clamping surfaces. This pressing method requires applying sufficient pressing force to the copper foil to ensure the clamping stability. And the fixture usually has a rigid contact with the copper foil. When the clamping force is too large, it is easy to cause the copper foil to become thinner, and then cause the copper foil to break at the edge of the fixture during the testing process. If the clamping force is reduced, it is easy for the copper foil to slip off the fixture; In the above process, there is a large amount of manual participation and auxiliary work content. The automation degree of the testing device is relatively low, which has a certain impact on the testing efficiency, and there is a risk of copper foil breakage or slipping during the testing process. Summary of the Invention

[0004] To solve the deficiencies of the prior art, the present invention provides a device and a method for testing the copper foil peel strength of a copper clad laminate, which have a higher degree of automation, help to improve the testing efficiency, and can effectively prevent the copper foil from breaking due to excessive clamping force.

[0005] To achieve the purpose of the present invention, the following scheme is proposed: A device for testing the copper foil peel strength of a copper clad laminate, comprising: A horizontally arranged track for placing a sample board. When placing, the copper-clad side faces downwards and the substrate faces upwards. A limiting member is provided above the track corresponding to the sample board; A pushing component, arranged at the front end of the track, is used to push the template towards the rear end of the track; A grooving component, arranged above the track, is used to cut the substrate into two front and rear sections, and a cutting groove perpendicular to the connection line of the front and rear ends of the track is formed between the two front and rear sections of the substrate; A traction component, arranged at the rear end of the track, the traction component includes a connecting rod movably arranged in the vertical direction, a tensiometer is arranged at the upper end of the connecting rod, and a mounting bracket is arranged at the top of the tensiometer; A clamping component includes a rectangular tube, the width of the inner hole thereof is greater than the width of the template, the height of the inner hole is greater than the thickness of the template, the orientation in the width direction of the rectangular tube is consistent with the width direction of the track, a pin is vertically penetrated through the top plate of the rectangular tube, the lower end of the pin is located in the inner hole of the rectangular tube, and the side of the lower end of the pin facing the front end of the rectangular tube is an inclined surface, a spring is arranged at the top of the pin to apply a downward pressure to the pin, a connecting shaft parallel to the width direction of the track is arranged on the side surface of the rectangular tube, the connecting shaft is rotatably connected to the mounting bracket, and a sensor for detecting the position of the pin is arranged on the rectangular tube.

[0006] A method for testing the copper foil peeling strength of a copper clad laminate is realized by using the above-mentioned device for testing the copper foil peeling strength of a copper clad laminate, and the testing method includes the following steps: Step 1: Place a copper clad laminate template with a predetermined width on the track, rotate the rectangular tube around the connecting shaft so that the front end of the rectangular tube faces the track, and adjust the height of the connecting rod so that the inner hole of the rectangular tube is aligned with the template; Step 2: Use the pushing component to push the template towards the rear end of the track, so that the rear end of the template is inserted into the rectangular tube. The upper edge of the rear end of the template contacts the inclined surface of the lower end of the pin, and then pushes the pin to move upward until the lower end of the pin presses tightly on the top surface of the template. The pushing component stops pushing. At this time, the sensor detects the upper end position of the pin, and the sensor signal is turned on; Step 3: The grooving component performs a cutting process on the substrate of the template to cut the substrate into a front section substrate and a rear section substrate, and a cutting groove is formed at the cutting position of the substrate; Step 4: After the substrate is cut, use the pushing component to continue pushing the template backward. When the cutting groove moves below the pin, the pin will descend and insert into the cutting groove, and the upper end of the pin moves out of the sensing range of the sensor, and the sensor signal is turned off, and the pushing component stops pushing; Step 5: The rectangular tube rotates around the connecting shaft, and the rear end of the rectangular tube swings downward by 90°, so that the rectangular tube is in a vertical state, and the side of the pin facing the rear end of the rectangular tube presses tightly on the front end face of the rear section substrate; Step 6: Move the connecting rod downward, and use the rectangular tube clamping component to pull the rear section substrate downward. During the downward movement of the rear section substrate, the copper foil on the bottom surface of the front section substrate will be separated from the front section substrate, and the data of the tensiometer during the downward movement of the connecting rod is collected as a reference for the peeling strength of the copper foil.

[0007] The beneficial effects of the present invention are as follows: The substrate is separated into front and rear sections by cutting, and the clamping component is used to separate the copper foil at the rear end of the substrate from the substrate during the flipping process, so that the operator does not need to manually separate the copper foil for connecting the fixture with a blade; while separating the copper foil at the initial stage, this solution also uses the clamping component to hold the rear section of the substrate, realizing the fixed connection between the end of the copper foil and the clamping component, facilitating the pulling of the copper foil during the peeling process, without directly clamping the copper foil, thus avoiding the copper foil from breaking due to excessive clamping force and preventing the copper foil from slipping due to insufficient clamping. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] The drawings described herein are only for illustrating the selected embodiments, not all possible implementation schemes, and are not intended to limit the scope of the present invention.

[0009] Figure 1 The overall structural schematic diagram of the present application when the rectangular tube is in a horizontal state is shown.

[0010] Figure 2 is shown Figure 1 The partial enlarged view at A in

[0011] Figure 3 The partial cross-sectional view of the present application when the substrate is cut is shown.

[0012] Figure 4 is shown Figure 3 The partial enlarged view at B in

[0013] Figure 5 The partial cross-sectional view of the present application when the bolt is inserted into the cutting groove is shown.

[0014] Figure 6 is shown Figure 5 The partial enlarged view at C in

[0015] Figure 7 The partial structural schematic diagram of the preferred embodiment of the present application is shown.

[0016] Figure 8 is shown Figure 7 The partial enlarged view at D in

[0017] Figure 9 The partial cross-sectional view of the present application when the rectangular tube is in a vertical state is shown.

[0018] Figure 10 is shown Figure 9 The partial enlarged view at E in

[0019] Figure 11 The partial schematic diagram when the arc teeth are separated from the rack is shown.

[0020] Figure 12A partial cross-sectional view of the present application when peeling the copper foil is shown.

[0021] Figure 13 A schematic structural view of the clamping assembly and the traction assembly is shown.

[0022] Markings in the figure: track - 1, limiting member - 11, extension section - 12, guide rail - 13, rack - 131, pushing assembly - 2, telescopic cylinder - 21, push plate - 22, grooving assembly - 3, driving motor - 31, cylindrical milling cutter - 32, slide rail - 33, telescopic device - 34, traction assembly - 4, connecting rod - 41, tensiometer - 42, mounting bracket - 43, clamping assembly - 5, rectangular tube - 51, connecting shaft - 511, pin - 52, spring - 53, sensor - 54, gantry - 55, rectangular block - 56, first side - 561, second side - 562, arc teeth - 563. Specific embodiments

[0023] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the following will describe the embodiments of the present invention in detail with reference to the accompanying drawings. However, the embodiments described herein are only a part of the embodiments of the present invention, rather than all of the embodiments.

[0024] Embodiment 1, as Figures 1 to 13 shown, a copper foil peeling strength testing device for a copper - clad laminate includes: a track 1, a pushing assembly 2, a grooving assembly 3, a traction assembly 4, and a clamping assembly 5.

[0025] The track 1 is horizontally arranged and is used to place a sample board of the copper - clad laminate to be tested. When placing, the copper foil of the copper - clad laminate faces downward and the substrate faces upward. A limiting member 11 is provided above the sample board corresponding to the track 1 to prevent the sample board from moving upward or warping. As a preferred structure, the limiting member 11 is a roller structure. When the sample board moves backward along the track 1, the limiting member 11 rolls in contact with the top surface of the sample board to reduce friction. The structure of the track 1 for supporting the sample board is a smooth planar structure, or a row of cylindrical rollers is provided along the length direction of the track 1 to support and convey the sample board to reduce the frictional force between the sample board and the track 1.

[0026] The pushing assembly 2 is arranged at the front end of the track 1 and is used to push the sample board to move toward the rear end of the track 1. Specifically, the pushing assembly 2 includes a telescopic cylinder 21 arranged at the front end of the track 1, and a push plate 22 is provided at the end of the telescopic rod of the telescopic cylinder 21 to push the sample board to move. The telescopic cylinder 21 can also be replaced by a linear motor.

[0027] The grooving assembly 3 is arranged above the track 1 and is used to cut the substrate into two front and rear sections, and the cutting groove between the front and rear sections of the substrate is perpendicular to the connection line of the front and rear ends of the track 1.

[0028] The traction assembly 4 is arranged at the rear end of the track 1. The traction assembly 4 includes a connecting rod 41 that moves vertically. At the upper end of the connecting rod 41, a tensiometer 42 is provided. At the top of the tensiometer 42, a mounting bracket 43 is provided. The tensiometer 42 is a flange type push-pull tensiometer, so as to stably connect the mounting bracket 43 to the connecting rod 41, and make the mounting bracket 43 move up and down together with the connecting rod 41. In a specific embodiment, the traction assembly 4 further includes a traction device for driving the connecting rod 41 to move, and the traction device is a cylinder or a hydraulic cylinder.

[0029] The clamping assembly 5 includes a rectangular tube 51. The width of the inner hole thereof is greater than the width of the template, and the height of the inner hole is greater than the thickness of the template. The orientation in the width direction of the rectangular tube 51 is consistent with the width direction of the track 1. A plug pin 52 vertically penetrates through the top plate of the rectangular tube 51. The lower end of the plug pin 52 is located inside the inner hole of the rectangular tube 51, and the side of the lower end of the plug pin 52 facing the front end of the rectangular tube 51 is an inclined surface. A spring 53 is provided at the top of the plug pin 52 for applying a downward pressure to the plug pin 52. A connecting shaft 511 parallel to the width direction of the track 1 is provided on the side surface of the rectangular tube 51. The connecting shaft 511 is rotatably connected to the mounting bracket 43. Specifically, the mounting bracket 43 is designed as a U-shaped structure. Connecting shafts 511 are coaxially provided on both sides of the rectangular tube 51, and the connecting shafts 511 on both sides are respectively rotatably connected to the two side walls of the U-shaped structure of the mounting bracket 43, so as to ensure the stability of the installation of the rectangular tube 51. A sensor 54 for detecting the position of the plug pin 52 is provided on the rectangular tube 51.

[0030] Embodiment 2, a method for testing the copper foil peeling strength of a copper clad laminate, is realized by using the above copper clad laminate copper foil peeling strength testing device. The testing method includes the following steps: Step 1: Place the template and adjust the rectangular tube 51. The specific content includes: Place a copper clad laminate template with a predetermined width on the track 1, rotate the rectangular tube 51 around the connecting shaft 511 so that the front end of the rectangular tube 51 faces the track 1, and adjust the height of the connecting rod 41 so that the inner hole of the rectangular tube 51 is aligned with the template. Step 2: Use the pushing assembly 2 to push the template towards the rear end of the track 1, so that the rear end of the template is inserted into the rectangular tube 51. The upper edge of the rear end of the template slides into contact with the inclined surface at the lower end of the plug pin 52, which is used to push the plug pin 52 to move upward. When the lower end of the plug pin 52 presses tightly against the top surface of the template, the pushing assembly 2 stops pushing. At this time, the sensor 54 detects the upper end position of the plug pin 52, and the signal of the sensor 54 is turned on. Step 3: The grooving assembly 3 cuts the substrate of the template, cutting the substrate into a front section substrate and a rear section substrate. The front section substrate refers to the substrate located at one end of the track 1, and the rear section substrate refers to the substrate located at one end of the rectangular tube 51. A cutting groove is formed at the cutting position of the substrate. After cutting, the cutting tool is separated from the template. In a specific embodiment, a cylindrical milling cutter 32 is used to cut the substrate, and after cutting, the cylindrical milling cutter 32 is moved to the outside of the template. Step 4: After the substrate is cut, the pushing component 2 continues to push the template backward. When the cutting groove moves below the plug pin 52, the plug pin 52 will descend and insert into the cutting groove. After the plug pin 52 descends, the upper part of the plug pin 52 moves out of the sensing range of the out-of-sensor 54, the signal of the sensor 54 is disconnected, and the pushing component 2 stops pushing. This solution uses the working completion signal of the grooving component 3 or the reset signal of the grooving tool as the judgment basis for the pushing component 2 to start again, and uses the connection and disconnection of the sensor 54 signal as the judgment basis for the pushing component 2 to stop pushing. Step 5: The rectangular tube 51 rotates around the connecting shaft 511, and the rear end of the rectangular tube 51 swings downward by 90°, making the rectangular tube 51 in a vertical state. One side of the plug pin 52 facing the rear end of the rectangular tube 51 presses against the front end face of the rear-section substrate. Here, the front end face specifically refers to the end face of the rear-section substrate facing one end of the track 1. Step 6: Move the connecting rod 41 downward, and use the clamping component 5 to pull the rear-section substrate downward. During the downward movement of the rear-section substrate, the copper foil on the bottom surface of the front-section substrate will separate from the front-section substrate, and the front-section substrate will also automatically move backward along the track 1. Collect the data of the tensiometer 42 during the downward movement of the connecting rod 41 as a reference for the peeling strength of the copper foil. During the peeling process, the clamping component 5 fixes the rear end of the copper foil by using the plug pin 52 to hold the front end face of the rear-section substrate, avoiding directly pressing and clamping the copper foil, which can effectively prevent the copper foil from thinning due to extrusion and then being broken. Moreover, there is enough bonding area between the rear-section substrate and the corresponding copper foil, and the force application direction is parallel to the copper foil, so that there is enough connection strength between the rear-section substrate and the copper foil, effectively preventing the rear-section substrate from separating from the corresponding copper foil when peeling the copper foil of the front-section substrate.

[0031] Preferably, as Figure 1 、 Figure 12 shown, an extension section 12 of the track 1 is provided behind the track 1. The clamping component 5 is located between the track 1 and the extension section 12. The extension section 12 is used to support the rear end of the front-section substrate after the copper foil is peeled, reducing the deformation amount of the substrate end during the test, thereby reducing the error of the test result.

[0032] Preferably, as Figure 1 、 Figure 3 、 Figure 4 and Figure 7As shown, the grooving assembly 3 includes a driving motor 31 disposed above the track 1 and movably arranged along the width direction of the track 1. A cylindrical milling cutter 32 is coaxially provided on the main shaft of the driving motor 31. The cylindrical milling cutter 32 is vertically downward, and the height of its lower end is in the same plane as the bottom surface of the substrate. In practical applications, a cylinder or a combination of a screw motor can be used to drive the driving motor 31 to reciprocate along the width direction of the track 1. During the movement, the driving motor 31 drives the cylindrical milling cutter 32 to rotate, so as to use the cylindrical milling cutter 32 to cut the template from one side to the other side in the width direction of the template until the template is cut into a structure with front and rear sections, and the copper foil still remains in a complete state, while the width of the cutting groove is controlled by the outer diameter size of the cylindrical milling cutter 32. As a preferred solution, the outer diameter of the cylindrical milling cutter 32 is greater than or equal to 2 mm, so that the width of the cutting groove is greater than or equal to 2 mm, facilitating the smooth insertion of the lower end of the plug 52. It can be understood that the larger the width of the cutting groove, the easier it is for the plug 52 to be inserted, and it helps to increase the rear end of the plug 52 to ensure that the plug 52 has sufficient bending strength. Therefore, the outer diameter of the cylindrical milling cutter 32 can also be selected as 4 mm, 5 mm, 6 mm or even larger. During the actual manufacturing and installation process, it is impossible to ensure that the height of the lower end of the cylindrical milling cutter 32 is absolutely in the same horizontal plane as the bottom surface of the substrate. Therefore, the thickness of the adhesive layer between the copper foil and the substrate can be used as the position fluctuation space for the lower end of the cylindrical milling cutter 32 to ensure that the substrate is completely cut through without damaging the copper foil.

[0033] Further preferably, as Figure 1 , Figure 7 shown, a pair of parallel slide rails 33 are erected along the width direction at the top of the track 1. The driving motor 31 is slidably arranged on the slide rails 33. One end of the slide rails 33 is provided with a telescopic device 34. The movable rod of the telescopic device 34 is connected to the driving motor 31. The telescopic device 34 is used to control the driving motor 31 to reciprocate along the slide rails 33. The telescopic device 34 is a component composed of a cylinder, a linear motor or a motor screw. The setting of the slide rails 33 helps to improve the stability of the driving motor 31 during movement, thus ensuring the constancy of the height position of the lower end surface of the cylindrical milling cutter 32, reducing the longitudinal jump of the cylindrical milling cutter 32, improving the machining accuracy, preventing damage to the copper foil and avoiding local missing machining of the substrate, and ensuring that the substrate is completely cut off.

[0034] Preferably, as Figure 4 , Figure 6 , Figure 9As shown, the top surface of the front end of the bottom plate of the rectangular tube 51 has a rounded structure, and the axis of the connecting shaft 511 coincides with the center of the rounded structure. The pin 52 is located above the axis of the connecting shaft 511. In this way, not only when the pin 52 presses the template, the bottom plate of the rectangular tube 51 supports the bottom surface of the end of the template, improving the stability of the template during the slitting process. Before the rectangular tube 51 is flipped, the cutting groove can also be positioned above the connecting shaft 511 by using the pin 52. When the rear end of the rectangular tube 51 rotates downward, the copper foil below the cutting groove can be rotated along the surface of the rounded structure, achieving the purpose of arc bending of the copper foil. And since the center of the rounded structure coincides with the axis of the connecting shaft 511, the copper foil can be effectively prevented from breaking at the edge of the bottom plate of the rectangular tube 51. This structure also makes the rotation center of the rectangular tube 51, that is, the axis of the connecting shaft 511, closer to the end of the track 1, reducing the distance between the bottom plate of the rectangular tube 51 and the end of the track 1 after flipping, making the angle between the peeled copper foil and the front section of the substrate closer to 90 degrees, so as to obtain more accurate test data.

[0035] Preferably, there is a predetermined distance between the clamping assembly 5 and the rear end of the track 1 and the grooving assembly 3. The purpose of this structural design is not only to provide enough flipping space for the clamping assembly 5, but also to space the cylindrical milling cutter 32 and the pin 52. This structure can ensure that the substrate at the rear end of the cutting groove has enough length, so that there is a large enough contact surface between the rear section of the substrate and the copper foil, thus ensuring sufficient connection strength between the copper foil and the rear section of the substrate and preventing the copper foil on the rear section of the substrate from peeling off during the test; in the specific design, the distance between the cylindrical milling cutter 32 and the pin 52 can be made greater than 20 mm.

[0036] Preferably, as Figure 4 、 Figure 6 、 Figure 10 and Figure 13 shown, a plurality of pins 52 are provided at intervals along the width direction of the rectangular tube 51. A gantry 55 is provided above the top plate of the rectangular tube 51. The tops of the springs 53 are all in contact with the bottom surface of the cross beam of the gantry 55. The cross beam of the gantry 55 can be used to limit the upper positions of all the springs 53 at the same time, simplifying the limiting structure of the springs 53. The tops of the pins 52 are all provided with counterbores for accommodating the springs 53, so as to reduce the spatial dimension occupied after the springs 53 are compressed, thereby reducing the height of the gantry 55, and thus shortening the distance between the extension section 12 and the clamping assembly 5, enabling the substrate after peeling the copper foil to contact the extension section 12 as early as possible. A convex edge is provided at the upper end of the pin 52, and the convex edge is located outside the rectangular tube 51 to prevent the pin 52 from falling off. The sensor 54 is provided on the side rod of the gantry 55.

[0037] Preferably, as Figure 11 、 Figure 13As shown in the figure, connecting shafts 511 are provided on both sides of the rectangular pipe 51 coaxially. The connecting shafts 511 are rotatably arranged on the mounting bracket 43. Rectangular blocks 56 are provided at the outer ends of the connecting shafts 511. The rectangular blocks 56 have a first side face 561 and a second side face 562 that are perpendicular to each other and adjacent. The first side face 561 is parallel to the front end face of the rectangular pipe 51, and the second side face 562 is parallel to the bottom plate of the rectangular pipe 51. At the junction of the first side face 561 and the second side face 562, there is an arc-shaped tooth 563 with a circular quarter arc length. The axis of the arc-shaped tooth 563 is coaxial with the connecting shaft 511. On both sides of the rear end of the track 1, longitudinally arranged guide rails 13 are provided. On the rear wall of the guide rail 13, a protruding rack 131 is provided. Here, the rear wall refers to the side of the guide rail 13 facing the rear of the track 1. The rack 131 is located in the middle section of the guide rail 13. Here, the middle section does not refer to the midpoint position of the guide rail 13, but means that the body of the guide rail 13 is reserved both above and below the rack 131.

[0038] As Figure 1 , Figure 2 shown, when the first side face 561 contacts the rear wall of the guide rail 13 above the rack 131, the arc-shaped tooth 563 meshes with the rack 131 to prevent the rectangular block 56 from moving upward relative to the guide rail 13. In a specific embodiment, the tooth groove of the arc-shaped tooth 563 close to the first side face 561 meshes with the uppermost tooth of the rack 131, and at this time, the horizontal front end of the rectangular pipe 51 faces the track 1, so that the inner hole of the rectangular pipe 51 is aligned with the template on the track 1. This structure uses the cooperation of the rack 131 and the arc-shaped tooth 563 to limit the upward movement of the rectangular block 56, and at the same time uses the contact between the first side face 561 and the rear wall of the guide rail 13 to limit the rotation angle of the rectangular pipe 51, making the rectangular pipe 51 horizontal.

[0039] As Figure 7 , Figure 8 and Figure 11As shown, when the second side surface 562 contacts the rear wall of the guide rail 13 below the rack 131, the arc-shaped teeth 563 are separated from the rack 131, the rectangular tube 51 is in a vertical state, and the front end faces upward. Specifically, as a preferred structural design, in order to ensure the separation of the arc-shaped teeth 563 from the rack 131, the number of tooth grooves of the arc-shaped teeth 563 can be set to be greater than the number of teeth of the rack 131. For example, the number of tooth grooves of the arc-shaped teeth 563 is set to 5, and the number of teeth of the rack 131 is set to 4; among them, the first tooth groove of the arc-shaped teeth 563 close to the second side surface 562 does not mesh with the teeth of the rack 131. In this way, when the second side surface 562 contacts the rear wall of the guide rail 13, the distance between the second tooth of the arc-shaped teeth 563 close to the second side surface 562 and the rear wall of the guide rail 13 is greater than the height of the teeth of the rack 131, so as to achieve the purpose of separating the arc-shaped teeth 563 from the rack 131. After the arc-shaped teeth 563 are separated from the rack 131, driven by the connecting rod 41, the clamping assembly 5 will move downward, and the rectangular block 56 will also slide downward along the guide rail 13. Because the second side surface 562 contacts the rear wall of the guide rail 13, the rectangular tube 51 can be prevented from rotating around the connecting shaft 511. During the downward movement of the rectangular tube 51, the copper foil will be pulled away from the substrate, and the effective data of the test structure can be recorded after the second side surface 562 contacts the rear wall of the guide rail 13.

[0040] After the first side surface 561 contacts the rear wall of the guide rail 13 above the rack 131, move the connecting rod 41 downward, which can drive the rectangular tube 51 to descend together. During the downward movement of the rectangular tube 51, the arc-shaped teeth 563 will start to roll on the rack 131, so that the rear end of the rectangular tube 51 rotates downward around the connecting shaft 511 until the second side surface 562 contacts the rear wall of the guide rail 13. Because the first side surface 561 and the second side surface 562 are perpendicular to each other, when the rectangular tube 51 rotates from the state where the first side surface 561 contacts the rear wall of the guide rail 13 to the state where the second side surface 562 contacts the rear wall of the guide rail 13, the rectangular tube 51 just rotates 90°; in this scheme, the rectangular tube 51 can be automatically rotated during the process of pulling the copper foil downward by the traction assembly 4, reducing the driving components used to independently drive the rotation of the rectangular tube 51, making the structure of the device simpler and more convenient to arrange.

[0041] The above are only the preferred embodiments of the present invention, and do not represent the only or limit the present invention. Those skilled in the art should understand that without departing from the scope of the present invention, various changes or equivalent replacements made to the present invention all belong to the scope of protection of the present invention.

Claims

1. A test device for the copper foil peeling strength of a copper clad laminate, characterized in that, Comprising: A horizontally arranged track (1) for placing a template, with the copper-clad side facing down and the substrate side facing up when placed, and a limiting member (11) is provided above the template corresponding to the track (1); A pushing component (2) provided at the front end of the track (1) for pushing the template to move towards the rear end of the track (1); A grooving component (3) provided above the track (1) for cutting the substrate into two front and rear sections, and a cutting groove perpendicular to the track (1) is formed between the two front and rear sections of the substrate; A traction component (4) provided at the rear end of the track (1), the traction component (4) includes a connecting rod (41) movably arranged in the vertical direction, a dynamometer (42) is provided at the upper end of the connecting rod (41), and a mounting bracket (43) is provided at the top of the dynamometer (42); A clamping component (5) includes a rectangular tube (51), the width of the inner hole thereof is greater than the width of the template, and the height of the inner hole is greater than the thickness of the template. The width direction of the rectangular tube (51) is the same as the width direction of the track (1). A pin (52) is vertically penetrated through the top plate of the rectangular tube (51), and the lower end of the pin (52) is located inside the inner hole of the rectangular tube (51), and the side of the lower end of the pin (52) facing the front end of the rectangular tube (51) is an inclined surface. A spring (53) is provided at the top of the pin (52) for applying a downward pressure to the pin (52). A connecting shaft (511) parallel to the width direction of the track (1) is provided on the side surface of the rectangular tube (51), and the connecting shaft (511) is rotatably connected to the mounting bracket (43). A sensor (54) for detecting the position of the pin (52) is provided on the rectangular tube (51); 2. The copper foil peeling strength testing device for a copper clad laminate according to claim 1, wherein, An extension section (12) of the track (1) is provided behind the track (1), and the clamping component (5) is located between the track (1) and the extension section (12); 3. The copper foil peeling strength testing device for a copper clad laminate according to claim 1, characterized in that, The grooving component (3) includes a driving motor (31) provided above the track (1) and movably arranged in the width direction of the track (1). A cylindrical milling cutter (32) is coaxially provided on the main shaft of the driving motor (31), the cylindrical milling cutter (32) faces vertically downward, and the height of its lower end is in the same plane as the bottom surface of the substrate; 4. The copper foil peeling strength testing device for a copper clad laminate according to claim 1, wherein, A pair of parallel slide rails (33) are arranged on the top of the track (1) in the width direction. The driving motor (31) is slidably arranged on the slide rails (33), and a telescopic device (34) is provided at one end of the slide rails (33), and the movable rod of the telescopic device (34) is connected to the driving motor (31); 5. The copper foil peeling strength testing device for a copper clad laminate according to claim 1, characterized in that, The top surface of the front end of the bottom plate of the rectangular tube (51) is a rounded structure, and the axis of the connecting shaft (511) coincides with the center of the rounded structure, and the pin (52) is located above the axis of the connecting shaft (511); 6. The copper foil peeling strength testing device for a copper clad laminate according to claim 5, characterized in that, There is a predetermined distance between the clamping component (5) and the rear end of the track (1) as well as the grooving component (3); 7. A copper foil peeling strength testing device for a copper clad laminate according to claim 1, characterized in that, A plurality of pins (52) are arranged at intervals in the width direction of the rectangular tube (51). A gantry (55) is provided above the top plate of the rectangular tube (51). The tops of the springs (53) are all in contact with the bottom surface of the cross beam of the gantry (55). A counterbore for accommodating the spring (53) is provided at the top of each pin (52). A convex edge is provided at the upper end of the pin (52), and the convex edge is located outside the rectangular tube (51). The sensor (54) is provided on the side rod of the gantry (55); 8. The copper foil peeling strength testing device for a copper clad laminate according to claim 1, wherein, On both sides of the rectangular tube (51), there are coaxial connecting shafts (511) provided. The connecting shafts (511) are rotatably arranged on the mounting bracket (43). At the outer ends of the connecting shafts (511), there are rectangular blocks (56). The rectangular block (56) has a first side surface (561) and a second side surface (562) that are perpendicular to each other and adjacent. The first side surface (561) is parallel to the front end face of the rectangular tube (51), and the second side surface (562) is parallel to the bottom plate of the rectangular tube (51). At the junction of the first side surface (561) and the second side surface (562), there is an arc-shaped tooth (563) with a circular quarter arc length. The axis of the arc-shaped tooth (563) is coaxial with the connecting shaft (511). On both sides of the rear end of the track (1), there are longitudinally arranged guide rails (13). On the rear wall of the guide rail (13), there is a protruding rack (131). The rack (131) is located in the middle section of the guide rail (13); When the first side surface (561) contacts the rear wall of the guide rail (13) above the rack (131), the arc-shaped tooth (563) meshes with the rack (131), and the front end of the rectangular tube (51) faces the track (1) horizontally; When the second side surface (562) contacts the rear wall of the guide rail (13) below the rack (131), the arc-shaped tooth (563) separates from the rack (131). The rectangular tube (51) is in a vertical state, and the front end faces upward.

9. A method for testing the copper foil peeling strength of a copper clad laminate, characterized in that, It is realized by using the copper foil peeling strength testing device for copper-clad laminates described in any one of claims 1 to 8. The testing method includes the following steps: Step 1: Place a copper-clad laminate sample plate with a predetermined width on the track (1). Rotate the rectangular tube (51) around the connecting shaft (511) so that the front end of the rectangular tube (51) faces the track (1). Adjust the height of the connecting rod (41) so that the inner hole of the rectangular tube (51) is aligned with the sample plate; Step 2: Use the pushing component (2) to push the sample plate towards the rear end of the track (1) so that the rear end of the sample plate is inserted into the rectangular tube (51). The upper edge of the rear end of the sample plate slides in contact with the inclined surface at the lower end of the plug pin (52) to push the plug pin (52) upward. When the lower end of the plug pin (52) presses tightly on the top surface of the sample plate, the pushing component (2) stops pushing. At this time, the sensor (54) detects the upper end position of the plug pin (52), and the signal of the sensor (54) is turned on; Step 3: The grooving component (3) cuts the substrate of the sample plate, cutting the substrate into a front-section substrate and a rear-section substrate. A cutting groove is formed at the cutting position of the substrate; Step 4: After the substrate is cut, use the pushing component (2) to continue pushing the sample plate backward. When the cutting groove moves below the plug pin (52), the plug pin (52) will descend and insert into the cutting groove. The upper end of the plug pin (52) moves out of the sensing range of the sensor (54), and the signal of the sensor (54) is turned off. The pushing component (2) stops pushing; Step 5: The rectangular tube (51) flips around the connecting shaft (511), and the rear end of the rectangular tube (51) swings downward by 90°, making the rectangular tube (51) in a vertical state. The side of the plug pin (52) facing the rear end of the rectangular tube (51) presses tightly on the front end face of the rear-section substrate; Step 6: Move the connecting rod (41) downward, and use the clamping assembly (5) to pull the rear-section substrate downward. During the downward movement of the rear-section substrate, the copper foil on the bottom surface of the front-section substrate will be separated from the front-section substrate, and the data of the tensiometer (42) during the downward movement of the connecting rod (41) is collected as a reference for the peeling strength of the copper foil.

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