Rotary type intelligent cold and hot circulation experiment device and method for BGA (Ball Grid Array) device
Through the rotary intelligent hot and cold cycle experiment device, the design of high-temperature and low-temperature half-box combined with stepper motor is used to solve the reliability problem of BGA devices in high and low-temperature environments, and the efficient and low-cost hot and cold cycle experiments are achieved, which improves the Test efficiency and automation level.
Patent Information
- Application Number
- CN202411706066.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-26
- Publication Date
- 2025-01-17
AI Technical Summary
The reliability problems of BGA devices due to changes in stress cycling in the solder joints during the changes in high and low temperatures. The existing cold and hot cycle experimental devices are inefficient and costly, making it difficult to effectively simulate extreme temperature environments.
A rotary intelligent hot and cold cycle experimental device is designed, including heating system, refrigeration system and hot and cold cycle system. The high-temperature and low-temperature half-box combined with a stepper motor is used to realize the cyclic rotation of the sample, and the temperature controller and sensor are accurately used. Adjust the temperature, reduce the need for frequent temperature increase and cooling, and improve experimental efficiency.
It realizes efficient hot and cold cycle experiments, improves the reliability testing efficiency of BGA devices, reduces costs, and has a compact structure, simple operation, high degree of automation and strong targeting.
Smart Images
Figure CN119322084A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of device experiments, and in particular to a rotary intelligent hot and cold cycle experiment device and method for BGA devices. Background Art
[0002] With the increasing demand for integrated circuit technology in the fields of computers, portable electronic products, automobile industry, aerospace and communications, BGA devices are increasingly used in various harsh environments, including high temperature, high humidity, salt spray and vibration shock. Among them, due to the influence of environmental temperature, operating temperature and heat dissipation equipment, BGA devices may have reliability problems due to high and low temperature changes. For example, there is a mismatch in thermal expansion coefficients between BGA solder joints and substrates and components. During the working process, temperature changes will cause stress cycles in the solder joints. Long-term stress cycles will cause cracks in the solder joints, destroy the solder joint structure, and eventually cause the entire device to fail.
[0003] Before mass production of BGA devices, the reliability of BGA devices needs to be tested, which requires hot and cold cycle experiments to simulate the extreme temperature change environment that electronic devices may encounter in actual use, verify the stability and reliability of the mechanical and electrical properties of electronic devices under temperature changes, and accelerate the aging process of electronic devices, making long-term performance degradation phenomena appear in a short time. This is extremely important for predicting product life and evaluating long-term stability. Summary of the invention
[0004] In view of the above problems, the present invention provides a rotary intelligent hot and cold cycle experimental device and method for BGA devices.
[0005] The adopted technical solution is a rotary intelligent hot and cold cycle experimental device for BGA devices, which includes a heating system, a cooling system and a hot and cold cycle system; The heating system is used to provide heating for the cold and hot circulation system and is connected to the cold and hot circulation system; The refrigeration system is used to provide refrigeration for the cold and hot circulation system and is connected to the cold and hot circulation system; The hot and cold circulation system is provided with a high-temperature half box and a low-temperature half box. Samples can be placed in the hot and cold circulation system, and the samples can circulate and rotate in the high-temperature half box and the low-temperature half box.
[0006] Optionally, the heating system includes a heating box, a heating power supply, a first temperature controller and a first temperature sensor; The heating power supply is electrically connected to the heating box and is used to control the start and stop of the heating box; The first temperature sensor is used to collect the temperature in the high-temperature half box, and the first temperature sensor is connected to the first temperature controller by signal; The first temperature controller is connected to the heating box signal and can control the temperature of the heating box.
[0007] Optionally, an electric heating plate and a blower are provided in the heating box.
[0008] Optionally, the refrigeration system includes a refrigeration box, a refrigeration power supply, a second temperature controller and a second temperature sensor; The refrigeration power supply is electrically connected to the refrigeration box and is used to control the start and stop of the refrigeration box; The second temperature sensor is used to collect the temperature in the low-temperature half box, and the second temperature sensor is connected to the second temperature controller by signal; The second temperature controller is connected to the refrigeration box signal and can control the temperature of the refrigeration box.
[0009] Optionally, a compressor, a condenser, an evaporator, a throttling expansion valve, pipe fittings, and a blower are provided in the refrigeration box.
[0010] Optionally, the bottom air outlet of the heating box is connected to the high-temperature half box through a second pipe, and the bottom air outlet of the refrigeration box is connected to the low-temperature half box through a first pipe.
[0011] Optionally, the heating box and the refrigeration box are both semi-cylinder structures, and the heating box and the refrigeration box are arranged opposite to each other, and a stepping motor is arranged between the heating box and the refrigeration box; A rotating plate is installed on the output shaft of the stepper motor, and the rotating plate can enter the heating box and the refrigeration box; The sample can be fixed on a rotating plate.
[0012] Optionally, both the heating box and the refrigeration box are provided with a through notch suitable for the rotating plate to pass through; The stepper motor is arranged at the center of the area between the heating box and the refrigeration box.
[0013] Optionally, the hot and cold circulation system further includes a motor controller and a transparent insulation door, wherein the motor controller is connected to the stepper motor signal to adjust the speed of the stepper motor; The transparent insulation door is covered between the heating box and the refrigeration box, and an exhaust port is opened on the transparent insulation door.
[0014] The present application also provides a rotary intelligent hot and cold cycle test method for BGA devices, which is implemented based on the above device and includes the following steps: S1, making an experimental device, connecting the power supply to the heating box, the cooling box and the stepping motor, and setting the parameters according to the experimental requirements: setting the high temperature in the first temperature controller, setting the low temperature in the second temperature controller, and setting the speed and cycle period in the motor controller; S2, open the transparent insulation door, turn the rotating plate to the front of the door, place the sample on the rotating plate, and then close the transparent insulation door; S3, start the heating box and the refrigeration box through the first temperature controller and the second temperature controller in turn, observe the real-time temperature of the high-temperature half box and the low-temperature half box on the first temperature controller and the second temperature controller, when the real-time temperature reaches the set temperature, start the stepper motor through the motor controller, after starting the stepper motor, the sample keeps circulating in and out of the high-temperature half box and the low-temperature half box with the rotating plate, each rotation of the sample is recorded as a cycle, and it will be counted in the motor controller at the same time, when the specified cycle is reached, the motor controller will sound an alarm, after the alarm is sounded, the stepper motor stops rotating and fixes the rotating plate at the vertical transparent insulation door position between the two boxes, and the heating box and the refrigeration box stop working at the same time; S4, after the sample has cooled for a period of time, open the transparent insulation door, take out the sample, and the experiment is completed.
[0015] The benefits of the present invention include: 1. The high temperature half box and low temperature half box in the hot and cold cycle system respectively simulate the temperature conditions of the sample in the high temperature environment and low temperature environment. The high temperature half box maintains high temperature for a long time, and the low temperature half box maintains low temperature for a long time. The motor rotates to drive the rotating plate and the sample to cycle in and out of the high and low temperature half box to realize the hot and cold cycle. At the same time, because the high and low temperature half box does not need to be frequently heated and cooled like a single hot and cold cycle box, the experimental efficiency of this device is high; 2. The heating box, cooling box, temperature controller, temperature sensor, DC power supply, stepper motor and motor controller in the device all have corresponding products on the market, which can be selected and assembled according to needs and budget. Therefore, the assembly of components of this device is more flexible and the cost is controllable; 3. The device is relatively small in size, and is easy and flexible to disassemble and transport; 4. High degree of automation and simple operation; 5. The hot and cold cycle system's barrel type and the motor's rotation combined with the hot and cold cycle experiment cleverly coordinate to make the device run more stably; 6. It is highly targeted at the hot and cold cycle experiments of BGA devices. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 This is a schematic diagram of the structure of a rotary intelligent hot and cold cycle experimental device for BGA devices; Figure 2 Schematic diagram of the internal structure of the hot and cold circulation system.
[0017] The figure marks include: 1 for cooling power supply, 2 for heating power supply, 3 for heating box, 4 for cooling box, 5 for first temperature controller, 6 for second temperature controller, 7 for transparent insulation door, 8 for DC power supply, 9 for motor controller, 10 for first pipeline, 11 for second pipeline, 12 for rotating plate, 13 for sample, 14 for second temperature sensor, 15 for first temperature sensor, 16 for high temperature half box, 17 for low temperature half box, 18 for stepping motor, and 19 for exhaust hole. DETAILED DESCRIPTION
[0018] The following describes the implementation of the present invention through specific examples. Those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific implementations, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the following embodiments and features in the embodiments can be combined with each other without conflict.
[0019] It should be noted that the illustrations provided in the following embodiments are only used to schematically illustrate the basic concept of the present invention, and thus the drawings only show components related to the present invention rather than being drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component may be changed arbitrarily, and the component layout may also be more complicated.
[0020] like Figure 1 and Figure 2 As shown, a rotary intelligent hot and cold cycle experimental device for BGA devices includes a heating system, a cooling system and a hot and cold cycle system; The heating system is used to provide heating for the cold and hot circulation system and is connected to the cold and hot circulation system; The refrigeration system is used to provide refrigeration for the cold and hot circulation system and is connected to the cold and hot circulation system; The hot and cold circulation system is provided with a high temperature half box 16 and a low temperature half box 17 . The sample 13 can be placed in the hot and cold circulation system, and the sample 13 can circulate and rotate in the high temperature half box 16 and the low temperature half box 17 .
[0021] The purpose of this design is to provide a rotary intelligent hot and cold cycle experiment device and method for BGA devices, which can realize the hot and cold cycle experiment of BGA devices through automation, with a fast heating rate, a large temperature range, simple operation, a relatively simple equipment structure, good safety, relatively low cost and good experimental effect.
[0022] Meanwhile, the heating system in this embodiment includes a heating box 3, a heating power supply 2, a first temperature controller 5 and a first temperature sensor 15; The heating power supply 2 is electrically connected to the heating box 3 and is used to control the start and stop of the heating box 3; The first temperature sensor 15 is used to collect the temperature in the high temperature half box 16, and the first temperature sensor 15 is connected to the first temperature controller 5 by signal; The first temperature controller 5 is connected to the heating box 3 by signal, and can control the temperature of the heating box 3 .
[0023] Furthermore, the heating box 3 is provided with an electric heating plate and a blower.
[0024] Meanwhile, the refrigeration system includes a refrigeration box 4, a refrigeration power supply 1, a second temperature controller 6 and a second temperature sensor 14; The refrigeration power supply 1 is electrically connected to the refrigeration box 4 and is used to control the start and stop of the refrigeration box 4; The second temperature sensor 14 is used to collect the temperature in the low temperature half box 17, and the second temperature sensor 14 is connected to the second temperature controller 6 by signal; The second temperature controller 6 is connected to the refrigeration box 4 by signal, and can control the temperature of the refrigeration box 4 .
[0025] In addition, a compressor, a condenser, an evaporator, a throttling expansion valve, pipes, and a blower are arranged in the refrigeration box 4 .
[0026] Furthermore, the bottom air outlet of the heating box 3 is connected to the high-temperature half box 16 through the second pipe 11, and the bottom air outlet of the refrigeration box 4 is connected to the low-temperature half box 17 through the first pipe 10.
[0027] At the same time, the heating box 3 and the refrigeration box 4 are both semi-circular barrel structures, and the heating box 3 and the refrigeration box 4 are arranged opposite to each other, and a stepping motor 18 is arranged between the heating box 3 and the refrigeration box 4; A rotating plate 12 is installed on the output shaft of the stepping motor 18, and the rotating plate 12 can enter the heating box 3 and the cooling box 4; The sample 13 can be fixed on the rotating plate 12 .
[0028] Furthermore, both the heating box 3 and the cooling box 4 are provided with through-notches suitable for the rotating plate 12 to pass through; The stepper motor 18 is arranged at the center of the area between the heating box 3 and the cooling box 4 .
[0029] At the same time, the hot and cold circulation system also includes a motor controller 9 and a transparent insulation door 7, wherein the motor controller 9 is connected to the stepper motor 18 signal to adjust the speed of the stepper motor 18; The transparent insulation door 7 is covered between the heating box 3 and the refrigeration box 4 , and an exhaust port 19 is opened on the transparent insulation door 7 .
[0030] The purpose of this design is that the high-temperature half box and the low-temperature half box in the hot and cold cycle system respectively simulate the temperature conditions of the sample in the high-temperature environment and the low-temperature environment. The high-temperature half box maintains high temperature for a long time, and the low-temperature half box maintains low temperature for a long time. The rotation of the motor drives the rotating plate and the sample to cycle in and out of the high and low temperature half boxes to realize hot and cold cycles. At the same time, because the high and low temperature half boxes do not need to be frequently heated and cooled like a single hot and cold cycle box, the experimental efficiency of this device is high; the heating box, refrigeration box, temperature controller, temperature sensor, DC power supply, stepper motor and motor controller in the device have corresponding products on the market, which can be selected and assembled according to needs and budget. Therefore, the assembly of components of this device is more flexible and the cost is controllable; the device is relatively small in size, and it is convenient and flexible to disassemble and transport; the degree of automation is high and the operation is simple; the circulation design combining the barrel shape of the high and low temperature half boxes of the hot and cold cycle system and the rotation of the motor is cleverly matched with the hot and cold cycle experiment, so that the operation stability of the device is better; it has strong pertinence to the hot and cold cycle experiment of BGA devices.
[0031] At the same time, this embodiment also provides a rotary intelligent hot and cold cycle experimental method for BGA devices based on the device, including the following steps: S1, making an experimental device, connecting the power supply to the heating box 3, the cooling box 4, and the stepping motor 18, and setting the parameters according to the experimental requirements: setting the high temperature in the first temperature controller 5, setting the low temperature in the second temperature controller 6, and setting the speed and cycle in the motor controller 9; S2, open the transparent insulation door 7, turn the rotating plate 12 to the front of the door, place and fix the sample 13 on the rotating plate 12, and then close the transparent insulation door 7; S3, start the heating box 3 and the refrigeration box 4 through the first temperature controller 5 and the second temperature controller 6 in turn, observe the real-time temperatures of the high-temperature half box 16 and the low-temperature half box 17 on the first temperature controller 5 and the second temperature controller 6, and when the real-time temperature reaches the set temperature, start the stepper motor 18 through the motor controller 9. After starting the stepper motor 18, the sample 13 keeps circulating in and out of the high-temperature half box 16 and the low-temperature half box 17 along with the rotating plate 12. Each rotation of the sample 13 is recorded as a cycle, and the number is counted in the motor controller 9. When the specified cycle is reached, the motor controller 9 will issue an alarm. After the alarm is issued, the stepper motor 18 stops rotating and fixes the rotating plate 12 at the position of the vertical transparent insulation door 7 between the two boxes, and the heating box 5 and the refrigeration box 6 stop working; S4, after the sample 13 has cooled for a period of time, the transparent insulation door 7 is opened, the sample is taken out, and the experiment is completed.
[0032] It should be pointed out that during the experiment, the temperature of the high and low temperature half boxes are observed and accurately controlled in real time through temperature sensors and temperature controllers. The high temperature half box is responsible for maintaining high temperature, and the low temperature half box is responsible for maintaining low temperature. There is no complicated temperature change process and the operation is simple. The experimental cycle can be changed by changing the speed of the stepper motor. The thermal cycle can reach dozens or even hundreds of times in a few hours, which greatly improves the experimental efficiency. At the same time, the experimental process has a high degree of automation and the experiment is relatively convenient and easy.
[0033] Finally, it should be noted that the above are only preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.
Claims
1. A rotary intelligent hot and cold cycle experimental device for BGA devices, characterized in that: Including heating system, refrigeration system and hot and cold circulation system; The heating system is used to provide heating for the cold and hot circulation system and is connected to the cold and hot circulation system; The refrigeration system is used to provide refrigeration for the cold and hot circulation system and is connected to the cold and hot circulation system; The hot and cold circulation system is provided with a high-temperature half box (16) and a low-temperature half box (17). The sample (13) can be placed in the hot and cold circulation system, and the sample (13) can circulate and rotate in the high-temperature half box (16) and the low-temperature half box (17).
2. A rotary intelligent hot and cold cycle experimental device for BGA devices according to claim 1, characterized in that: The heating system comprises a heating box (3), a heating power supply (2), a first temperature controller (5) and a first temperature sensor (15); The heating power supply (2) is electrically connected to the heating box (3) and is used to control the start and stop of the heating box (3); The first temperature sensor (15) is used to collect the temperature in the high-temperature half box (16), and the first temperature sensor (15) is connected to the first temperature controller (5) by signal. The first temperature controller (5) is connected to the heating box (3) by signal, and is capable of controlling the temperature of the heating box (3).
3. A rotary intelligent hot and cold cycle experimental device for BGA devices according to claim 2, characterized in that: An electric heating plate and a blower are arranged in the heating box (3).
4. A rotary intelligent hot and cold cycle experimental device for BGA devices according to claim 2, characterized in that: The refrigeration system comprises a refrigeration box (4), a refrigeration power supply (1), a second temperature controller (6) and a second temperature sensor (14); The refrigeration power supply (1) is electrically connected to the refrigeration box (4) and is used to control the start and stop of the refrigeration box (4); The second temperature sensor (14) is used to collect the temperature in the low-temperature half box (17), and the second temperature sensor (14) is connected to the second temperature controller (6) by signal. The second temperature controller (6) is connected to the refrigeration box (4) by signal, and is capable of controlling the temperature of the refrigeration box (4).
5. A rotary intelligent hot and cold cycle experimental device for BGA devices according to claim 4, characterized in that: The refrigeration box (4) is provided with a compressor, a condenser, an evaporator, a throttling expansion valve, pipe fittings, and a blower.
6. A rotary intelligent hot and cold cycle experimental device for BGA devices according to claim 4, characterized in that: The bottom air outlet of the heating box (3) is connected to the high-temperature half box (16) through the second pipe (11), and the bottom air outlet of the refrigeration box (4) is connected to the low-temperature half box (17) through the first pipe (10).
7. A rotary intelligent hot and cold cycle experimental device for BGA devices according to claim 6, characterized in that: The heating box (3) and the refrigeration box (4) are both semi-circular barrel structures, and the heating box (3) and the refrigeration box (4) are arranged opposite to each other, and a stepping motor (18) is arranged between the heating box (3) and the refrigeration box (4); A rotating plate (12) is mounted on the output shaft of the stepping motor (18), and the rotating plate (12) can enter the heating box (3) and the cooling box (4); The sample (13) can be fixed on the rotating plate (12).
8. The rotary intelligent hot and cold cycle experimental device for BGA devices according to claim 7, characterized in that: The heating box (3) and the refrigeration box (4) are both provided with a through notch suitable for the rotating plate (12) to pass through; The stepper motor (18) is arranged at the center of the area between the heating box (3) and the cooling box (4).
9. The rotary intelligent hot and cold cycle experimental device for BGA devices according to claim 8, characterized in that: The hot and cold circulation system further comprises a motor controller (9) and a transparent insulation door (7); the motor controller (9) is connected to the stepper motor (18) by signal and is used to adjust the rotation speed of the stepper motor (18); The transparent insulation door (7) is covered between the heating box (3) and the refrigeration box (4), and an exhaust port (19) is provided on the transparent insulation door (7).
10. A rotary intelligent hot and cold cycle test method for BGA devices, based on a rotary intelligent hot and cold cycle test device for BGA devices provided in claim 9, characterized in that: The following steps are involved: S1, making an experimental device, connecting the heating box (3), the cooling box (4), and the stepping motor (18) to power, and setting parameters according to the requirements of the experiment: setting the high temperature in the first temperature controller (5), setting the low temperature in the second temperature controller (6), and setting the speed and cycle period in the motor controller (9); S2, open the transparent insulation door (7), rotate the rotating plate (12) to the front of the door, place the sample (13) on the rotating plate (12), and then close the transparent insulation door (7); S3, starting the heating box (3) and the cooling box (4) in turn through the first temperature controller (5) and the second temperature controller (6), observing the real-time temperatures of the high-temperature half box (16) and the low-temperature half box (17) on the first temperature controller (5) and the second temperature controller (6), and when the real-time temperature reaches the set temperature, starting the stepper motor (18) through the motor controller (9), and after starting the stepper motor (18), the sample (13) keeps circulating in and out of the high-temperature half box (16) and the low-temperature half box (17) along with the rotating plate (12), and each rotation of the sample (13) is recorded as a cycle, and the number is counted in the motor controller (9), and when the specified cycle is reached, the motor controller (9) will issue an alarm, and after the alarm is issued, the stepper motor (18) stops rotating and fixes the rotating plate (12) at a position perpendicular to the transparent insulation door (7) between the two boxes, and the heating box (5) and the cooling box (6) stop working; S4, after the sample (13) has cooled for a period of time, the transparent insulation door (7) is opened and the sample is taken out, and the experiment is completed.