In January 2018, Wuxi opto Automation Co. , Ltd. officially launched its Chip-On-Submount chip aging test equipment (OA-BIT1500) to the domestic market...
In January 2018, Wuxi opto Automation Co. , Ltd. officially launched the self-developed Chip-On-Submount chip aging test equipment for semi-conductor laser (OA-BIT1500) into the domestic market, the device is used for the automatic aging test of COS chip, which can test the performance index of Cos chip in batches and ensure the output stability and long-term reliability of high power semi-conductor laser. The equipment has completely broken the technology and market monopoly of such equipment in the United States, Germany and other Western developed countries. Compared with the one million price of imported equipment, the pricing of the system is more grounded, fully meet the needs of domestic industry development, and we have a professional and technical team with more than 20 years of experience in the industry as a guarantee, can provide more rapid response and better after-sales service for domestic customers.
一、AGED COS devices
Device size：4.5*5.75mm
二、Requirement analysis
1、At the same time, 50/100/150(optional) high-power laser COS devices are aged。
2、HIGH-POWER COS devices need constant current 18A power supply, voltage is generally about 1.8 V。
3、Taking into account the universality of the device, according to a single device maximum 20A, 3V design.
4、The temperature of high power COS device should be controlled from 45 °C to 70 °C.
三、Description of aging program：
COS aging equipment consists of temperature stable part, aging monitoring part and monitoring software. Temperature control part includes temperature detection, temperature regulation, semiconductor cooling film, Power Supply and cooling water The aging monitoring part is composed of imported high stability high power supply, voltage detection circuit, current detection circuit, constant current control circuit and aging rack. Industrial Control Computer and aging monitoring software for equipment configuration.The schematic diagram of the electrical part of the system scheme is as follows：
1、Voltage detection accuracy ± 0.01 V, current detection control accuracy ± 0.01 A
2、Each COS has current, voltage detection, and equipped with a large current field effect transistor for Protection Devices;
3、Each COS is designed with triple current and voltage protection to ensure that the product is not damaged.
Temperature Control Circuit Schematic, control accuracy ± 0.5 °C, ensure temperature stability.
Schematic diagram of equipment cabinet
Schematic diagram of aging part inside Cabinet (10 pieces in 5 groups)。
Each aging rack contains 10 temperature sensing probes。
Ø The COS device is connected by a high current spring probe;
Ø The current and voltage of COS device are detected, and the information is uploaded through CAN bus
Ø By installing a thermal detector at the front of the laser to detect the illumination, and through software calculation and analysis, the normal light output of COS devices can be judged
Ø When anomaly is detected (such as over-voltage, over-current, under-voltage, no light) , short-circuit Cos device, and Upload Abnormal Information;
Ø Any COS damage will not lead to damage to other devices.
Control of the mainframe
1、IPC Mainframe：
Ø Installed inside the equipment cabinet, quantity: 1 set；
Ø Using Yanhua industrial control computer, Windows system software。
2、 Exchanger
ØInstalled inside the equipment cabinet, quantity: 1 set；
Ø Connect the computer, the program-controlled power supply and the control module in each unit；
Ø CAPACITY: 24 channels。
3、Monitoring Software：
Ø At the same time on-line monitoring 50/100/150 circuit current and voltage。
Protective measures
1、Power protection: to ensure that the measured COS devices are not damaged by high current or high voltage impact, the power supply has a reliable anti-surge circuit. In addition, the measures of gradually increasing the current (from 0A to 18A in 9 seconds) and voltage (from 0V to 1.8 v in 9 seconds) are adopted in the aging process. The control waveform of the current is as follows：
Note: The rising speed is adjustable
2、Power-down protection: In order to reduce the stress of the measured COS device, the measure of slow power-down is adopted, that is, the power supply is changed from 18A to 0A within 3 seconds. In addition, in the event of an unexpected power outage, the voltage and current applied to the COS device will be completely turned off, and there will be no recoil or recharging.
The main interface of the software is shown below
四、Aging procedure
1、Ready and rolling
·When the device is powered up, turn on the computer and start the aging monitoring software；
·Set current value, voltage limit value, aging temperature and aging time。
2、Material to be tested
·Aging COS devices are placed one by one into a defined groove；
·Gently press down the elbow clamp, so that the spring probe pressed the positive and negative electrodes of the test piece；
·Close the device door。
3、Operational aging
·Click the run button on the software interface and the device begins to age；
4、Aging process
·The device automatically starts the temperature control module to control the temperature；
·Equipment automatic voltage and current load slowly, and detect the status of each power supply control module。
·Once there is an exception, the power supply control module cut off the power supply, and in the software interface marked in red；
·If there is no exception, the device controls the constant current source to load slowly to the specified current (such as 18A) , and continuously record the voltage of each COS module, the temperature of each temperature control module, and record to the database; if there is an exception, the computer software will show the alarm；
·Set the aging time to, the device automatically stop on the power supply to COS devices, and prompt completion。
5、Replacement of materials
·Confirm the equipment prompt to complete aging or abnormal shutdown before opening the equipment cabinet door；
·According to the software record, and the power supply test module indicator light color, respectively good and bad goods；
·After changing the material, repeat step 2 to start the next round of aging test。
五、Scheme characteristics
1、Modular design uses a set of 10 COS devices, taking into account both performance and cost；
2、Water-cooled TEC protection measures are adopted to ensure that the aging temperature deviation is within 0.5 ° C, with overtemperature protection；
3、With triple current and voltage protection to ensure that the product is not damaged；
4、Power-on from 0.5 V0.5 a gradually start to add power, no surge, no big current impact；
5、Accidental power cut, artificial power cut are provided with anti-recoil and anti-repeated impact protection；
6、The damage of any part or device under test will not result in the damage of other devices；
7、Automatic recording of COS damage time, easy to trace and failure quality analysis；
8、For each device configuration 3V20A capacity, abnormal material can provide 5V voltage, equipment versatility；
9、Using the standard program-controlled power supply, only need to replace the power supply when adjusting the capacity, do not need to modify the hardware design；
10、Each unit has current, voltage detection, and equipped with a large current field effect transistor for the Protection Module；
11、Water-cooled TEC is adopted for temperature control, and it is equipped with 10/20/30 temperature detection sensor to ensure uniform temperature, independent temperature control, fast speed and high precision；
12、Can Bus and Ethernet communication are adopted to improve data stability；
13、The sealed box body can be filled with nitrogen to protect the device；
14、The emitted laser is absorbed by the black heat sink and carried away by water circulation to avoid excessive temperature in the cabinet；
15、Each rack can be 1 ~ 50 pieces of COS aging, if you need to expand the number of aging, can increase the height of the cabinet；
16、With ESD protection measures to prevent electrostatic damage。
六、Master list：
