Location History:
- Yokohama, JP (2003 - 2007)
- Tokyo, JP (2003 - 2007)
Company Filing History:
Years Active: 2003-2007
Title: Hironaru Yamaguchi: Innovator in Display Technology
Introduction
Hironaru Yamaguchi is a prominent inventor based in Tokyo, Japan. He has made significant contributions to the field of display technology, holding a total of 7 patents. His innovative work has advanced the manufacturing processes of thin film transistors and polysilicon films.
Latest Patents
Yamaguchi's latest patents include a display device and a method for manufacturing the same. This invention involves measuring the average film thickness of an amorphous silicon film formed on a substrate. The process includes irradiating the amorphous silicon film with a laser beam to create a polysilicon film, followed by measuring the grain size distribution of the polysilicon film. An optimum value of energy density for laser beam irradiation is calculated based on grain size values measured at two points of the polysilicon film. This method ensures the formation of a uniform polysilicon film with large grain sizes across a large-size substrate, facilitating the production of polysilicon TFTs in extensive areas.
Another notable patent is related to a thin film transistor and its manufacturing method. In this invention, an amorphous silicon film is laser irradiated multiple times to create a film composed of several crystal grains. This process suppresses the formation of protrusions at the boundaries of adjoining grains, resulting in a polycrystalline silicon thin film transistor with high electron mobility of 200 cm/Vs or above.
Career Highlights
Throughout his career, Yamaguchi has worked with esteemed companies such as Hitachi, Ltd. and Hitachi Displays, Ltd. His experience in these organizations has allowed him to refine his expertise in display technologies and contribute to groundbreaking innovations.
Collaborations
Yamaguchi has collaborated with notable coworkers, including Takuo Tamura and Kiyoshi Ogata. Their joint efforts have further propelled advancements in the field of display technology.
Conclusion
Hironaru Yamaguchi's contributions to display technology through his patents and career achievements highlight his role as a leading inventor in the industry. His innovative methods continue to influence the development of advanced display devices.
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.