Company Filing History:
7 out of 2,528 
3 out of 21,351 
2 out of 7,524 
Years Active: 1998-2025
Title: Hitoshi Maeda: Innovator in Semiconductor Technology
Introduction
Hitoshi Maeda is a prominent inventor based in Tokyo, Japan, known for his significant contributions to semiconductor technology. With a total of 13 patents to his name, Maeda has made remarkable advancements in the field, particularly in the development of photomasks and semiconductor devices.
Latest Patents
One of Maeda's latest patents is for a mask blank and method of manufacturing photomask. This innovation features a structure where a thin film for pattern formation and a hard mask film are stacked on a transparent substrate. The thin film is composed of a material containing chromium, while the hard mask film includes a stacked structure of a lower layer made from silicon and oxygen, and an upper layer made from tantalum and oxygen with an oxygen content of 30 atom % or more. Notably, the ratio of the thickness of the upper layer relative to the total thickness of the hard mask film is 0.7 or less. Another significant patent involves a semiconductor device where the height of the upper surface of a control gate electrode is lower than the highest position of a lower surface of a silicide layer on a memory gate electrode. This design ensures that the structure in contact with the ONO film between the control gate electrode and the memory gate electrode consists solely of the control gate electrode and the memory gate electrode made of polysilicon.
Career Highlights
Throughout his career, Hitoshi Maeda has worked with notable companies such as Hoya Corporation and Mitsubishi Electric Corporation. His experience in these organizations has allowed him to refine his skills and contribute to groundbreaking innovations in semiconductor technology.
Collaborations
Maeda has collaborated with several talented individuals in his field, including Yasutaka Horigome and Ryo Ohkubo. These collaborations have further enhanced his work and led to the development of advanced technologies.
Conclusion
Hitoshi Maeda's contributions to semiconductor technology through his patents and collaborations highlight his role as a leading inventor in the industry. His innovative work continues to influence the field and pave the way for future advancements.
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.