Dong Zhang

Title: **Dong Zhang: Innovator in Transparent Flexible Substrates**

Introduction

Dong Zhang, an accomplished inventor located in Uniontown, OH, has made significant contributions to the field of materials science with an impressive portfolio of 34 patents. His latest innovations focus on the development of advanced films that serve critical functions in microelectronic devices.

Latest Patents

One of Dong Zhang's recent inventions is titled "Aromatic Polyamide Films for Transparent Flexible Substrates." This innovative approach involves creating transparent films from soluble aromatic copolyamides that possess glass transition temperatures greater than 300° C. The copolyamides contain pendant carboxylic groups and are solution cast into films using solvents such as N,N-dimethylacetamide (DMAc) and N-methyl-2-pyrrolidinone (NMP). After thermal curing, these films demonstrate transmittances exceeding 80% from 400 to 750 nm, alongside coefficients of thermal expansion of less than 20 ppm, making them highly solvent resistant and ideal for flexible substrates in microelectronics.

Another noteworthy invention is his "Thermally Stable, Low Birefringent Copolyimide Films." This class of solvent-resistant, flexible copolyimide substrates maintains high optical transparency (over 80% from 400 to 750 nm) even after exposure to temperatures of 300° C. The copolyimides are synthesized from alicyclic dianhydrides, aromatic cardo diamines, and diamines with free carboxyl groups. These substrates are versatile and can be utilized in the construction of flexible optical displays, microelectronic devices, and photovoltaic technologies due to their unique properties.

Career Highlights

Throughout his career, Dong Zhang has operated in various capacities within the advanced materials sector. He has been associated with Akron Polymer Systems, Inc., where he continued to explore applications of polymer technology in electronics.

Collaborations

In his endeavors, Dong Zhang has collaborated with several notable professionals, including Frank Wayne Harris and Jiaokai Jing. Their partnerships have been instrumental in advancing research and development in high-performance polymers and flexible substrates.

Conclusion

Dong Zhang's contributions to the field of materials science exemplify the innovative spirit essential for the advancement of technology in microelectronics. With his extensive patent portfolio and collaborative efforts, he continues to make strides in creating materials that enhance the functionality and performance of various electronic devices.