Power device heating device

Abstract

The utility model discloses a power device heating device, which comprises a frame, a heating plate, an elastic sheet and an insulating block, the frame comprises a top plate and a bottom plate, the top plate is provided with an adjusting piece capable of moving up and down, the lower end of the adjusting piece is connected with the middle of the elastic sheet, and the elastic sheet is positioned below the top plate; the heating plate is located above the bottom plate and is opposite to the elastic pieces, a plurality of insulation heat insulation blocks are installed on the bottom plate, and the heating plate is arranged on the insulation heat insulation blocks. According to the power device heating device, the heating plate is heated and then heat is transferred to the power devices, so that the power devices on the heating plate are relatively uniform in temperature rise and high in temperature rise and reduction speed, the insulation block prevents the heating plate from being in contact with the frame, the temperature of the heating plate is effectively guaranteed, and the to-be-tested device rapidly reaches the test temperature; the whole detection time can be shortened, and the method is suitable for rapid operation.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of heating device, concretely relates to a power device heating device. BACKGROUND

[0002] In the evaluation of the parameters of the test power device, for example, the evaluation of the parameters of the test semiconductor device and the use of the semiconductor, there are often requirements for testing the electrical performance under different high-temperature conditions, such as 100 DEG C, 150 DEG C, 175 DEG C, and the like. In order to ensure that the semiconductor device is used normally under different temperature environments, the constant temperature heating of the device to be tested is usually carried out.

[0003] The traditional method is to directly weld a lead wire on the pin of the power device, put it into a high-temperature oven, and achieve the required high-temperature temperature by baking the tube body in the oven, and then insert the lead wire into the test seat to test the electrical performance of the power device to be tested. Or use the heating method of the heating table, place multiple power devices to be tested on the heating table, and test after baking to a certain temperature.

[0004] The above two methods have low heating efficiency of the power device, low temperature control accuracy, long waiting time after temperature adjustment, and cannot realize the rapid and continuous detection of multiple high-temperature temperature points of the power device, and the two heating devices have large volume and inconvenient operation. UTILITY MODEL CONTENTS

[0005] In view of the deficiencies of the prior art, the utility model provides a power device heating device, which mainly solves the problems of large volume, inconvenient operation, and low heating efficiency of the power device of the existing heating device.

[0006] To achieve the above purpose, the utility model is realized by the following technical scheme:

[0007] A power device heating device, comprising a frame, a heating plate, a spring piece and an insulating heat insulating block, the frame comprises a top plate and a bottom plate, the top plate is provided with an adjusting part capable of moving up and down, the lower end of the adjusting part is connected to the middle part of the spring piece, the spring piece is located below the top plate, one end of the spring piece is connected to the top plate through an elastic part, the heating plate is located above the bottom plate and opposite to the spring piece, the bottom plate is provided with a plurality of insulating heat insulating blocks, and the heating plate is arranged on the insulating heat insulating blocks.

[0008] Preferably, the frame is a metal frame, the bottom plate is provided with a first stand and a second stand, and the bottom surface of the top plate is respectively installed on the first stand and the second stand.

[0009] Preferably, the bottom plate is provided with a plurality of clamping jaws for fixing the heating plate.

[0010] Preferably, the base plate is provided with a slot corresponding to each insulating and heat-insulating block position, and the lower end of each insulating and heat-insulating block is inserted into the corresponding slot.

[0011] Preferably, the spring is a metal sheet.

[0012] Preferably, the elastic element is a spring.

[0013] Preferably, the adjusting component is an adjusting bolt, and the top plate is provided with a threaded hole. The adjusting bolt is installed in the threaded hole through the thread, and the head of the adjusting bolt is located above the top plate.

[0014] Preferably, the heating plate is a ceramic heating plate.

[0015] Preferably, the space between the heating plate and the base plate is filled with heat-insulating material.

[0016] Preferably, it also includes a temperature controller, and a thermocouple is installed inside the heating plate, with the thermocouple electrically connected to the temperature controller.

[0017] The power device heating device provided by this utility model has at least one of the following advantages:

[0018] 1. The power device heating device of this application heats the heating plate and then transfers the heat to the power device. Therefore, the temperature rise of each power device on the heating plate is relatively uniform and the heating and cooling speed is fast. The insulating heat block avoids the heating plate from contacting the frame, effectively ensuring the temperature of the heating plate and quickly bringing the device under test to the test temperature. This can shorten the overall testing time and is suitable for rapid operation.

[0019] 2. Existing solutions use ovens or heating tables, which differ from the overall structure of the device in this application. The device in this application has a compact and small overall structure, is easy to test and operate, has no extra leads, and has low parasitic parameters.

[0020] 3. Existing oven designs cannot heat the device under test (DUT) via heat transfer from the back of the device; instead, they rely on thermal radiation. Existing heating platforms experience rapid heat loss during heating and lack a reliable fixing device to ensure the DUT is firmly attached to the heating element. In the device of this application, during testing, the adjusting element moves downwards, pressing down on a spring. One end of the spring is connected to an elastic element, which provides an upward pulling force. This causes the end of the spring away from the elastic element to press against the DUT on the heating plate. The spring provides an elastic pressure to fix the DUT in place, making it very convenient for testing single-tube DUT devices.

[0021] 4. Existing ovens and heating stages have slow heating rates, and the speed at which the power device under test reaches thermal equilibrium is also slow. The device in this application adjusts the temperature of the ceramic heating plate through a temperature controller, achieving linear temperature control and rapidly increasing the temperature of the device under test. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of the power device heating device according to an embodiment of the present invention;

[0023] Figure 2 yes Figure 1 A schematic diagram of the power device heating device used to fix the power device under test. Detailed Implementation

[0024] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0025] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0026] like Figures 1 to 2 As shown, this embodiment discloses a power device heating device, including a frame, a heating plate 9, a spring 8, and an insulating heat insulation block 10. The frame includes a top plate 1 and a bottom plate 4. An adjusting member that can move up and down is installed on the top plate. The lower end of the adjusting member is connected to the middle of the spring 8. The spring 8 is located below the top plate 1. One end of the spring 8 is connected to the top plate 1 through an elastic member 7. The heating plate 9 is located above the bottom plate 4 and opposite to the spring 8. A plurality of insulating heat insulation blocks 10 are installed on the bottom plate 4, and the heating plate 9 is placed on the insulating heat insulation blocks 10.

[0027] In this embodiment, the frame is a metal frame, with a first column 2 and a second column 3 mounted on the base plate, and the two ends of the bottom surface of the top plate respectively mounted on the first column and the second column. In other embodiments, the frame may also be made of other materials, such as glass or ceramic, preferably materials with high temperature resistance.

[0028] In this embodiment, the gripper is mounted on the base plate. The gripper can be a metal gripper that is elastic and has a certain degree of high temperature resistance. The gripper can be integrally formed with the base plate or fixed to the base plate by welding or other methods.

[0029] In this embodiment, preferably, the spring is a metal sheet. In other embodiments, the material of the spring is not limited to this. For example, a high-temperature resistant polymer spring or a composite material spring can also be used.

[0030] Preferably, the elastic element is a spring. In other embodiments, the elastic element may also be a metal sheet, a polymer elastic block, or a composite material elastic block, etc.

[0031] In this embodiment, the base plate has slots corresponding to the positions of each insulating heat insulation block, and the lower end of each insulating heat insulation block is inserted into the corresponding slot. This method can effectively fix the insulating heat insulation blocks without the need for high-temperature adhesive. In other embodiments, the installation method of the insulating heat insulation blocks is not limited to this.

[0032] Preferably, the adjusting component is an adjusting bolt 5, and the top plate is provided with a threaded hole. The adjusting bolt is installed in the threaded hole through the thread 6. The head of the adjusting bolt is located above the top plate. The vertical height of the spring can be adjusted by rotating the head of the adjusting bolt.

[0033] Preferably, the heating plate is a ceramic heating plate. The heating plate and the base plate do not contact each other, thereby reducing heat loss from the heating plate. To achieve better heat insulation, preferably, heat insulation material 11 is filled between the heating plate and the base plate.

[0034] The power device heating device in this embodiment also includes a temperature controller, and a thermocouple is installed inside the heating plate, which is electrically connected to the temperature controller. An electric heating element is also installed inside the heating plate. In other embodiments, the heating plate can be a fixed-temperature ceramic heating plate, such as a 150°C fixed-temperature ceramic heating plate or a 100°C fixed-temperature ceramic heating plate, thus eliminating the need for a temperature controller.

[0035] In this embodiment, when the power device heating device performs high-temperature testing on a power device (e.g., a semiconductor), after setting the temperature of the ceramic heating plate 9 using the temperature controller 13, the position of the spring is adjusted by rotating the adjusting bolt 5. One end of the spring is held by a spring, and the other end presses down on the power device under test, so that the back of the power device 14 under test is in close contact with the ceramic heating plate (e.g., a semiconductor). Figure 2 ).

[0036] The above-described embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. These modifications or substitutions do not cause the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model. Therefore, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

Claims

1. A heating device for a power device, characterized in that, It includes a frame, a heating plate, a spring, and insulating blocks. The frame includes a top plate and a bottom plate. An adjustable component that can move up and down is installed on the top plate. The lower end of the adjustable component is connected to the middle of the spring. The spring is located below the top plate. One end of the spring is connected to the top plate through an elastic element. The heating plate is located above the bottom plate and opposite to the spring. Several insulating blocks are installed on the bottom plate, and the heating plate is placed on the insulating blocks.

2. The power device heating device according to claim 1, characterized in that, The frame is a metal frame, with a first column and a second column installed on the base plate, and the two ends of the bottom surface of the top plate respectively installed on the first column and the second column.

3. The power device heating device according to claim 1, characterized in that, The base plate is equipped with several clamps for fixing the heating plate.

4. The power device heating device according to claim 1, characterized in that, The base plate has a slot corresponding to the position of each insulating and heat-insulating block, and the lower end of each insulating and heat-insulating block is inserted into the corresponding slot.

5. The power device heating device according to claim 1, characterized in that, The spring is a metal sheet.

6. The power device heating device according to claim 1, characterized in that, The elastic element is a spring.

7. The power device heating device according to claim 1, characterized in that, The adjusting component is an adjusting bolt. The top plate has a threaded hole, and the adjusting bolt is installed in the threaded hole through the thread. The head of the adjusting bolt is located above the top plate.

8. The power device heating device according to claim 1, characterized in that, The heating plate is a ceramic heating plate.

9. The power device heating device according to claim 1, characterized in that, The space between the heating plate and the base plate is filled with heat-insulating material.

10. The power device heating device according to claim 1, characterized in that, It also includes a temperature controller, and a thermocouple is installed inside the heating plate. The thermocouple is electrically connected to the temperature controller.

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