Changchun and innovation LED thermal resistance testing system for the LED industry package quality optimal promoter

2017 Taiwan International Lighting Technology Exhibition (TILS 2017) held in Nangang Exhibition Hall in April 12th, LED Taiwan exhibited the same period, attracted 150 exhibitors, booth number reached 500, the most complete collection of the lighting industry chain, as the largest in Taiwan China lighting and LED technology exhibition. In the process of innovative technology development TechSTAGE LED conference, optodisc Technology (Aurotek) technology development project of Congda and Dr. Zheng Chun independent research and development of LED resistance tester, and in LEDinside's interview on the current layout of heat detection in the LED industry market size is still small views.

At the TechSTAGE innovation technology conference, and Dr. Gu Cheng, Dr. Zheng, published his own LED thermal resistance testing innovation technology and equipment advantages.

According to the LEDinside observation, the LED market in the field of backlight and lighting market have entered the mature period, the overall output appeared stagnant growth, in addition to some niche industrial applications, vehicle LED is one of the few with the rapid growth of the market scale and the application of. On the other hand, CSP LED related applications (including backlighting, mobile flash, IR/UV, LED) and intelligent energy-saving lighting have become the key to another wave of growth in LED production opportunities in the future.

These areas are currently the focus of the market, with the industry gradually to high power LED development trend, manufacturers for the quality requirements of the LED measurement demand; however the thermal resistance of LED to the traditional measurement technology, not only time-consuming and can only do sampling test in the laboratory, there is no effective method to improve the LED detection system the process and the yield of the product, so the industry will need to update the solution.

The quality of the LED light source depends on the interaction of the three characteristics of the optical, electrical, and thermal characteristics of the package. Too much waste heat (thermal, loss) will reduce the LED performance.

Speed and accuracy subvert past technology

According to the demand, and the show JD2020 LED thermal resistance tester to subvert the traditional testing technology, JEDEC Solid State Technology Association established in accordance with the JESD51-14 standard, and simplify the instantaneous thermal resistance measurement method, when the temperature changes of LED after power rapid measuring LED element in a timeline, and analysis of data to determine the specific structure of thermal resistance the value and achieve the goal of the optimization of LED components.

And innovation JD2020 thermal resistance tester won the 2017 Taiwan Quality Award

And Dr. LED and JD2020 thermal resistance tester

Unlike traditional thermal resistance measurement techniques, the company said that the company's new JD2020 tester has greatly improved its speed, accuracy, and customization.

First, speed. The trouble for LED manufacturers is that the LED production line can only be used for rapid detection of brightness and voltage, and the LED thermal resistance test should be sent to the laboratory using special instruments. It takes 10 minutes to detect a LED's complete thermal resistance or thermal structure on average, so it can only be sampled at present. And the JD2020 tester greatly shorten the measurement time, measuring a LED component only need 0.1-0.2 seconds, you can measure the whole batch of LED components, improve the overall yield.

Secondly, in terms of accuracy, compared with the existing technology, and JD2020 can more effectively determine the thermal structure properties of materials in packaging. The key point of LED thermal resistance measurement is to analyze the two key structures that affect the heat dissipation of LED: the distribution of the solid crystal layer and the piece of cloth.

At present, the existing X optical detection technology, ultrasonic measurement results of two-dimensional images, less than the misjudgment of and easily; in contrast, LED and thermal resistance tester developed by Chun can change a complete measurement of thermal energy from air conduction to the package during this period of time, thermal resistance, thermal resistance coefficient to find the high part, analysis the solid crystal layer and on the quality of advanced classification, auxiliary cooling package LED manufacturers to find defects, improve the quality of LED, do LED optimization, it is very important to the development of high power LED to the day after.

JD2020 can be integrated with the production line by one or two stations to achieve rapid and accurate on-line thermal resistance test.

Flexible customization to achieve the integration of online detection on the downstream to create a win-win situation

Furthermore, in terms of customization, JD2020 and traditional instruments the biggest difference is that can do the integration and production of online AT platform, which is LED component of photoelectric thermal characteristics of the whole production line can be detected in the.

Dr. Zheng explained that the integration of online machines can be divided into single station and double station. In a single station architecture, the Sorter sends the LED components to the tester and provides the current for test classification; the dual station integration measurement uses two testers to simultaneously measure the LED thermal structure, saving the overall test time. He stressed: "according to customer demand, providing different degree of customization of the production line machine integration, to achieve online LED packaging quality testing," is the service and goals of Chun jun."

And Chun JD2020 successfully imported the high power CSP LED, LED PCB thermal resistance testing and academic institutions in the market, to provide good quality for thermal resistance test, LED manufacturers to reduce non-performing products complaints, improve product yield and reduce production cost; at the same time, and Chun has available and test solution factory the machine integration, hoping to gradually in the high power LED market to break the foreign monopoly promotion accounted for. In the aspect of low power LED market layout, and Chun is also actively developing other LED test and measurement method, for example: to replace for the detection of wire bonding (wire bonding) the traditional disruptive technology quality, provide more effective quality analysis scheme.

Looking ahead, technical trends, LED thermal resistance test is still a fledgling industry, but for future LED plant development and import high power LED, it is necessary detection technology. Dr. Zheng believes that, in addition to lighting, LED