Hong-Da Chang

Title: Innovations of Hong-Da Chang in LED Technology

Introduction

Hong-Da Chang is an accomplished inventor based in Tai-Chung Hsien, Taiwan, recognized for his significant contributions in the field of light-emitting diode (LED) technology. With a total of four patents to his name, Chang's innovations focus primarily on the methods and structures for improving LED efficiency and performance.

Latest Patents

Among his latest inventions, one notable patent is the "Method of making white LED package structure having a silicon substrate." This method involves providing a silicon substrate and performing an etching process to create a series of cup structures on its surface. A reflective layer is then formed atop the silicon substrate, followed by a transparent insulating layer. The innovation continues with the bonding of a range of blue LEDs, each emitting different wavelengths, into the cup structures. Finally, phosphor powders, corresponding to the wavelengths of the blue LEDs, are mixed into a sealing material which is then applied to create a phosphor structure.

Another significant patent is the "Light emitting diode structure," featuring a silicon substrate with a unique cup-structure resembling a paraboloid. The design includes multiple through-holes that penetrate the silicon substrate, with a conductive layer filling these holes and extending outward. A light-emitting diode is positioned at the focus of the cup-structure, ensuring optimal light emission.

Career Highlights

Hong-Da Chang works at Touch Micro-System Technology Corporation, where he continues to push the boundaries of LED technology through his innovative designs. His extensive experience and in-depth knowledge have made substantial impacts in the field, particularly in enhancing LED performance and efficiency.

Collaborations

Throughout his career, Chang has collaborated with several talented engineers, including Hung-Yi Lin, with whom he has likely exchanged ideas and innovations to advance their projects and patents. These collaborations highlight the importance of teamwork in driving technological advancement.

Conclusion

Hong-Da Chang's achievements underscore his role as a vital innovator in the realm of LED technology. His inventive methods and structures not only contribute to the advancement of LED performance but also pave the way for future innovations in lighting solutions. The ongoing development and commercialization of his patented technologies have the potential to create significant improvements in various applications, illustrating the enduring impact of his work in the field.