Location History:
- Taichang, TW (1998)
- Taichung, TW (1993 - 2002)
- Hsin-Chu, TW (1997 - 2009)
Company Filing History:
16 out of 442 
1 out of 1 
1 out of 7 Years Active: 1993-2009
Title: Innovations of Thomas Chang in Semiconductor Technologies
Introduction
Thomas Chang, a prominent inventor based in Taichung, Taiwan, has made significant contributions to the field of semiconductor technology, holding a remarkable total of 19 patents. His inventions have led to advancements in memory devices, particularly in Read-Only Memory (ROM) and Flash memory technologies.
Latest Patents
Among his latest inventions, Chang developed a novel semiconductor Read-Only Memory (ROM) device that is capable of storing more than one bit per cell. This innovation utilizes multiple threshold voltages and offers flexible device channel width and length ratios, making it feasible for a ROM cell to store multiple bits efficiently. The design incorporates both N-type and P-type MOS devices using standard CMOS processes or flat-cell mask ROM processes. Additionally, he has introduced a Flash memory process utilizing polysilicon spacers, which enhances the construction of EPROM cells. This method features a gate structure equipped with sidewall spacers made from silicon layers that are converted into insulating layers, yielding a more accurate and uniformly deposited layer compared to traditional dielectric methods.
Career Highlights
Throughout his career, Thomas Chang has worked with notable corporations including Mosel Vitelic Corporation and Mosel Vitelic, Inc., where he continued to innovate in semiconductor technologies. His patented innovations have not only pushed the boundaries of memory storage but have also optimized the manufacturing processes associated with these devices.
Collaborations
In his pursuit of innovation, Chang has collaborated with esteemed colleagues such as Liang-Choo Hsia and Chih-Hsien Wang. These partnerships have undoubtedly contributed to the advancement of his inventions and the progress of semiconductor technology as a whole.
Conclusion
Thomas Chang stands out as a visionary inventor in the semiconductor industry. His 19 patents reflect a deep commitment to improving memory technologies, and his work continues to impact the landscape of innovation in this vital field. The advancements made through his inventions showcase the potential for further breakthroughs in memory storage solutions.
Inventor’s Patent Attorneys refers to legal professionals with specialized expertise in representing inventors throughout the patent process. These attorneys assist inventors in navigating the complexities of patent law, including filing patent applications, conducting patent searches, and protecting intellectual property rights. They play a crucial role in helping inventors secure patents for their innovative creations.