Company Filing History:
3 out of 189 
2 out of 115 
1 out of 78 Years Active: 2018-2022
Title: The Innovations of Ming-Hua Du
Introduction
Ming-Hua Du is a notable inventor based in Qinhuangdao, China. He has made significant contributions to the field of circuit board technology, holding a total of 3 patents. His work focuses on enhancing the functionality and reliability of circuit boards, particularly in high-frequency and waterproof applications.
Latest Patents
Ming-Hua Du's latest patents include a "Circuit board with high reflectivity and method for manufacturing the same." This invention features a wiring board that includes a wiring layer and a bond pad, designed to enhance reflectivity while maintaining functionality. The first solder resist layer covers the wiring layer, exposing the bond pad, while the second solder resist layer infills a groove without contacting the bond pad's mounting surface.
Another significant patent is the "Waterproof circuit board and method for manufacturing the same." This invention involves a method for creating a waterproof circuit board that includes a first wiring substrate suitable for high-frequency transmissions and a second wiring substrate for low-frequency transmissions. The design ensures that the circuit board remains functional even in challenging environments.
Career Highlights
Ming-Hua Du has worked with several companies throughout his career, including Avary Holding (Shenzhen) Co., Limited and Hongqisheng Precision Electronics (Qinhuangdao) Co., Ltd. His experience in these organizations has allowed him to develop and refine his innovative ideas in circuit board technology.
Collaborations
Ming-Hua Du has collaborated with notable coworkers such as Jian-Yi Hao and Yan-Lu Li. Their combined expertise has contributed to the successful development of advanced circuit board technologies.
Conclusion
Ming-Hua Du's contributions to circuit board technology through his patents and collaborations highlight his innovative spirit and dedication to advancing the field. His work continues to influence the industry and pave the way for future developments.