A DBC substrate test fixture

Abstract

The utility model relates to the technical field of BC substrate testing, and discloses a DBC substrate testing fixture, comprising a mounting column, the outer surface of the mounting column is rotatably connected with a mounting disk, the outer surface of the mounting disk is fixedly connected with a plurality of mounting plates, the bottom of the mounting plate is fixedly connected with an electric telescopic rod, the bottom of the electric telescopic rod is fixedly connected with a connecting frame, the bottom of the connecting frame is fixedly connected with a supporting plate, the DBC substrate testing fixture is arranged by placing a DBC substrate on a clamping plate, then fixing the DBC substrate by a vacuum suction cup, then driving the mounting column and the mounting disk to rotate by a transmission mechanism, and then cooperating with the electric telescopic rod, thereby achieving simultaneous discharge, testing and retrieval of the DBC substrate, achieving continuous testing of a plurality of DBC substrates, and greatly improving the testing efficiency of the DBC substrate.

Description

Technical Field

[0001] The utility model relates to the technical field of BC substrate testing, in particular to a DBC substrate testing fixture. Background Art

[0002] DBC substrate, also known as ceramic circuit board, includes ceramic substrate and metal circuit layer. For electronic packaging, the packaging substrate plays a key role in connecting the upper and lower parts, connecting the internal and external heat dissipation channels, and also has functions such as electrical interconnection and mechanical support.

[0003] In the preparation process of DBC substrate, oxidation time and oxidation temperature are the two most important parameters. After the copper foil is pre-oxidized, the bonding interface can form enough CuxOy phase to wet the Al 2O3 ceramic and copper foil, and has a high bonding strength; if the copper foil is not pre-oxidized, the CuxOy wettability is poor, and a large number of voids and defects will remain at the bonding interface, reducing the bonding strength and thermal conductivity.

[0004] In the preparation process of DBC substrate, ultrasonic scanning microscope (SAT), also known as ultrasonic SAT equipment or ultrasonic SAT scanning imaging technology, is generally used to test tiny cavities and defects inside the workpiece.

[0005] The main testing principle of ultrasonic scanning microscope is: high-frequency ultrasonic waves generated by ultrasonic transducers reach the sample through coupling media (such as deionized water, alcohol, silicone oil). Since the transmission of ultrasonic energy requires the medium to be continuous, discontinuous interfaces such as pores, impurities, delamination, cracks, etc. will affect the propagation of ultrasonic signals, and the signal will be reflected or refracted. When ultrasonic waves pass through the sample, due to the difference in acoustic impedance, reflected waves will appear at the interface with defects or poor bonding. Through the scanning axis of the ultrasonic transducer, the product to be tested can be scanned at high speed and accurately to obtain an image (different images can be obtained through different ultrasonic scanning methods). The interface or defect of the delamination can be tested from the selected depth and plane of the sample or from the bonding interface.

[0006] When the existing ultrasonic SAT equipment is tested, the DBC substrate is mainly manually placed on a fixing fixture in a water tank in the ultrasonic SAT equipment to be fixed, and then the surface is scanned by the ultrasonic SAT equipment. After the scan, it needs to be manually taken out from the water tank. The scanning device needs to be shut down during the taking and placing process, and multiple DBC substrates cannot be continuously scanned and tested, resulting in low testing efficiency for the DBC substrates. At the same time, after the test, the water on the surface of the DBC substrate cannot be dried, and the surface water of the DBC substrate after the test needs to be manually cleaned, resulting in reduced testing efficiency for the DBC substrate. Utility Model Content

[0007] The purpose of the utility model is to provide a DBC substrate testing fixture to solve the deficiencies in the above-mentioned background technology.

[0008] The purpose of the utility model can be achieved through the following technical solutions:

[0009] A DBC substrate testing fixture comprises a mounting column, the outer surface of the mounting column is rotatably connected to a mounting plate, the outer surface of the mounting plate is fixedly connected to a plurality of mounting plates, the bottom of the mounting plate is fixedly connected to an electric telescopic rod, the bottom of the electric telescopic rod is fixedly connected to a connecting frame, the bottom of the connecting frame is fixedly connected to a supporting plate, the top of the supporting plate is fixedly connected to a clamping plate, a plurality of vacuum suction cups are fixedly connected to the clamping plate, the bottom of the vacuum suction cup is fixedly connected to a first circle tube, the outer surface of the first circle tube is fixedly connected to a hose, one end of the hose is fixedly connected to a second circle tube fixedly connected to the mounting plate, an electromagnetic valve is provided on the hose, the outer surface of the second circle tube is fixedly connected to a vacuum pump fixedly connected to the mounting plate through a pipeline, the top of the mounting plate is transmission-connected to a transmission mechanism connected to the mounting column, and the transmission mechanism is used to drive the mounting plate to rotate.

[0010] As a further solution of the utility model: the transmission mechanism includes a motor fixedly connected to the mounting column, the output end of the motor is fixedly connected to the transmission shaft through a coupling, the outer surface of the transmission shaft is fixedly sleeved with a first gear, and the outer surface of the first gear is meshingly connected with a transmission gear ring fixedly connected to the mounting plate.

[0011] As a further solution of the utility model: a connecting plate is fixedly connected to one side of the mounting column, two hot blow boxes are fixedly connected to the bottom of the connecting plate, a plurality of hot blow hoods are fixedly connected to the opposite sides of the two hot blow boxes, a plurality of ventilation holes are provided on the top of the support plate and the clamping plate, and an air supply mechanism connected to the mounting column is fixedly connected to one side of the hot blow box.

[0012] As a further solution of the utility model: the air supply mechanism includes a hot air blower fixedly connected to the mounting column, the output end of the hot air blower is fixedly connected to a first pipe, and one end of the first pipe is fixedly connected to a second pipe fixedly connected to two hot air blow boxes.

[0013] As a further solution of the utility model: a fixing plate is fixedly connected to the bottom of the mounting column, and a plurality of fixing holes are opened on the fixing plate.

[0014] Beneficial effects of the utility model:

[0015] (1) The DBC substrate is placed on the clamping plate, and then fixed by a vacuum suction cup. The mounting column and the mounting plate are then driven to rotate by a transmission mechanism. The electric telescopic rod is then used to simultaneously discharge, test and retrieve the DBC substrate, thereby realizing continuous testing of multiple DBC substrates and greatly improving the testing efficiency of the DBC substrate.

[0016] (2) After the DBC substrate is tested, the clamping plate is driven upward by the electric telescopic rod, and then the mounting column is driven to rotate by the transmission mechanism, so that the DBC substrate on the clamping plate is transferred to between the two hot blow boxes. At the same time, the hot blower starts to work, and the hot blower blows air into the hot blow box through the first pipe and the second pipe. Then the hot air is blown out through the hot blow hood on the hot blow box, and then the hot air is blown through the vents to dry the bottom and top of the DBC substrate, thereby realizing automatic drying of the surface of the DBC substrate after the test, which greatly improves the test efficiency and test effect of the DBC substrate. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The utility model is further described below in conjunction with the accompanying drawings.

[0018] Figure 1 It is a first stereogram of the external structure of the utility model;

[0019] Figure 2 It is a second stereoscopic diagram of the external structure of the utility model;

[0020] Figure 3 This utility model Figure 2 A is an enlarged view of the middle image.

[0021] In the figure: 1. mounting column; 2. mounting plate; 3. mounting plate; 4. electric telescopic rod; 5. connecting frame; 6. supporting plate; 7. clamping plate; 8. vacuum suction cup; 9. first circle of pipe; 10. hose; 11. second circle of pipe; 12. vacuum pump; 13. motor; 14. transmission shaft; 15. first gear; 16. transmission gear ring; 17. connecting plate; 18. hot air blower box; 19. hot air blower hood; 20. vent; 21. hot air blower; 22. first pipeline; 23. second pipeline; 24. fixing plate; 25. fixing hole. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] Embodiment 1

[0024] See also Figure 1-Figure 3 As shown, the utility model is a DBC substrate testing fixture, comprising a mounting column 1, the outer surface of the mounting column 1 is rotatably connected with a mounting plate 2, the outer surface of the mounting plate 2 is fixedly connected with a plurality of mounting plates 3, the bottom of the mounting plate 3 is fixedly connected with an electric telescopic rod 4, the bottom of the electric telescopic rod 4 is fixedly connected with a connecting frame 5, the bottom of the connecting frame 5 is fixedly connected with a supporting plate 6, the top of the supporting plate 6 is fixedly connected with a clamping plate 7, a plurality of vacuum suction cups 8 are fixedly connected to the clamping plate 7, the bottom of the vacuum suction cup 8 is fixedly connected with a first circle tube 9, the outer surface of the first circle tube 9 is fixedly connected with a hose 10, one end of the hose 10 is fixedly connected with a second circle tube 11 fixedly connected to the mounting plate 3, an electromagnetic valve is arranged on the hose 10, the electromagnetic valve is controlled by a PLC control program, the outer surface of the second circle tube 11 is fixedly connected with a vacuum pump 12 fixedly connected to the mounting plate 3 through a pipeline, the top of the mounting plate 2 is transmission-connected with a transmission mechanism connected to the mounting column 1, and the transmission mechanism is used to drive the mounting plate 2 to rotate.

[0025] The transmission mechanism includes a motor 13 fixedly connected to the mounting column 1. The motor 13 is controlled by a PLC programming program, and can be controlled to rotate forward and reverse and rotate at an angle. The output end of the motor 13 is fixedly connected to a transmission shaft 14 through a coupling. A first gear 15 is fixedly sleeved on the outer surface of the transmission shaft 14. The outer surface of the first gear 15 is meshedly connected to a transmission gear ring 16 fixedly connected to the mounting disk 2.

[0026] The motor 13 drives the transmission shaft 14 to rotate, the transmission shaft 14 drives the transmission ring gear 16 to rotate through the first gear 15, and the transmission ring gear 16 drives the installation plate 2 to rotate.

[0027] The DBC substrate to be tested is placed on the clamping plate 7 on the support plate 6, and then the electromagnetic valve on the hose 10 is opened, and then the vacuum pump 12 is operated. The vacuum pump 12 sucks air to the vacuum suction cup 8 through the pipeline, the first coil 9, the hose 10 and the second coil 11, and the DBC substrate placed on the clamping plate 7 is adsorbed and fixed, so that the DBC substrate is clamped and fixed. Then, the installation column 1 is driven to rotate by the transmission mechanism, and the installation column 1 drives the installation disk 2 to rotate. The installation disk 2 drives the clamping plate 7 to rotate to the top of the test head of the test equipment through the electric telescopic rod 4, the connecting frame 5 and the support plate 6, and then the clamping plate 7 is driven to move downward by the electric telescopic rod 4, so that the clamping plate 7 is fixed. The DBC substrate enters the water tank, and then the surface of the DBC substrate is scanned and tested by the testing equipment. During the test, the staff can put the next DBC substrate into the next clamping plate 7 for fixation. When the test is completed, the transmission mechanism drives the mounting column 1 to rotate 90°, so that the tested DBC substrate enters the next station for drying, and the testing equipment tests the next DBC substrate. When the drying is completed, the staff takes out the tested and dried DBC substrate, thereby realizing the simultaneous discharge, testing and retrieval of the DBC substrate, realizing continuous testing of multiple DBC substrates, and greatly improving the testing efficiency of the DBC substrate.

[0028] Embodiment 2

[0029] Based on Example 1, please refer to Figure 2 and Figure 3 As shown, a connecting plate 17 is fixedly connected to one side of the mounting column 1, two hot blow boxes 18 are fixedly connected to the bottom of the connecting plate 17, a plurality of hot blow hoods 19 are fixedly connected to the opposite sides of the two hot blow boxes 18, a plurality of ventilation holes 20 are provided on the top of the supporting plate 6 and the clamping plate 7, and an air supply mechanism connected to the mounting column 1 is fixedly connected to one side of the hot blow box 18.

[0030] The air supply mechanism includes a hot air blower 21 fixedly connected to the mounting column 1 , an output end of the hot air blower 21 is fixedly connected to a first pipe 22 , and one end of the first pipe 22 is fixedly connected to a second pipe 23 fixedly connected to two hot air blowing boxes 18 .

[0031] When the DBC substrate test is completed, the clamping plate 7 is driven to move upward by the electric telescopic rod 4, and then the mounting column 1 is driven to rotate by the transmission mechanism, so that the DBC substrate on the clamping plate 7 is transferred to between the two hot blow boxes 18, and at the same time the hot blower 21 starts to work, and the hot blower 21 blows air into the hot blow box 18 through the first pipe 22 and the second pipe 23, and then the hot air is blown out through the hot blow hood 19 on the hot blow box 18, and then the hot air is hot-blown and dried on the bottom and top of the DBC substrate through the vent 20, thereby realizing automatic drying of the surface of the DBC substrate after the test, which greatly improves the test efficiency and test effect of the DBC substrate.

[0032] The bottom of the mounting column 1 is fixedly connected with a fixing plate 24, and a plurality of fixing holes 25 are provided on the fixing plate 24. The fixing plate 24 and the fixing holes 25 facilitate the fixing and installation of the clamp.

[0033] The above is a detailed description of an embodiment of the utility model, but the content is only a preferred embodiment of the utility model and cannot be considered to limit the scope of implementation of the utility model. All equivalent changes and improvements made within the scope of application of the utility model should still fall within the scope of the patent coverage of the utility model.

Claims

1. A DBC substrate test fixture, comprising a mounting post (1), characterized in that: The outer surface of the mounting column (1) is rotatably connected to a mounting plate (2), the outer surface of the mounting plate (2) is fixedly connected to a plurality of mounting plates (3), the bottom of the mounting plate (3) is fixedly connected to an electric telescopic rod (4), the bottom of the electric telescopic rod (4) is fixedly connected to a connecting frame (5), the bottom of the connecting frame (5) is fixedly connected to a supporting plate (6), the top of the supporting plate (6) is fixedly connected to a clamping plate (7), the clamping plate (7) is fixedly connected to a plurality of vacuum suction cups (8), the bottom of the vacuum suction cup (8) is fixedly connected to A first circle tube (9) is connected, the outer surface of the first circle tube (9) is fixedly connected to a hose (10), one end of the hose (10) is fixedly connected to a second circle tube (11) fixedly connected to the mounting plate (3), an electromagnetic valve is provided on the hose (10), the outer surface of the second circle tube (11) is fixedly connected to a vacuum pump (12) fixedly connected to the mounting plate (3) through a pipeline, the top of the mounting plate (2) is transmission-connected to a transmission mechanism connected to the mounting column (1), and the transmission mechanism is used to drive the mounting plate (2) to rotate.

2. A DBC substrate test fixture according to claim 1, characterized in that: The transmission mechanism comprises a motor (13) fixedly connected to the mounting column (1); the output end of the motor (13) is fixedly connected to a transmission shaft (14) via a coupling; a first gear (15) is fixedly sleeved on the outer surface of the transmission shaft (14); the outer surface of the first gear (15) is meshingly connected to a transmission gear ring (16) fixedly connected to the mounting plate (2).

3. A DBC substrate test fixture according to claim 1, characterized in that: A connecting plate (17) is fixedly connected to one side of the mounting column (1), two hot blow boxes (18) are fixedly connected to the bottom of the connecting plate (17), a plurality of hot blow hoods (19) are fixedly connected to opposite sides of the two hot blow boxes (18), a plurality of ventilation holes (20) are provided on the top of the support plate (6) and the clamping plate (7), and an air supply mechanism connected to the mounting column (1) is fixedly connected to one side of the hot blow box (18).

4. A DBC substrate test fixture according to claim 3, characterized in that: The air supply mechanism comprises a hot air blower (21) fixedly connected to the mounting column (1), the output end of the hot air blower (21) being fixedly connected to a first pipe (22), and one end of the first pipe (22) being fixedly connected to a second pipe (23) fixedly connected to two hot air blow boxes (18).

5. A DBC substrate test fixture according to claim 1, characterized in that: A fixing plate (24) is fixedly connected to the bottom of the mounting column (1), and a plurality of fixing holes (25) are provided on the fixing plate (24).

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