This inventor holds 5 USPTO granted patents. Top assignees: Kabushiki Kaisha Toyota Chuo Kenkyusho, Kabushiki Kaisha Toyoda Jidoshokki Seisakusho. Active years: 1988-1999.
Company Filing History:
5 out of 1,153 
2 out of 1,343 
Years Active: 1988-1999
Title: Hiroshi Tadano: Innovator in Memory Devices and Semiconductor Technology
Introduction
Hiroshi Tadano is a prominent inventor based in Nagoya, Japan. He has made significant contributions to the fields of memory devices and semiconductor technology. With a total of 5 patents to his name, Tadano's work showcases his innovative spirit and technical expertise.
Latest Patents
One of his latest patents is an ultra-high density memory device that utilizes a photoinductive ferromagnetic thin film. This device features a GaAs substrate with a tip arranged to face the thin film. The GaAs substrate is mounted on an xyz scanner, allowing for precise adjustments in the three-dimensional positional relationship between the substrate and the tip. Blue light is used to achieve uniform magnetization orientation of the molecules. By applying a relatively high voltage, a significant current flows between the tip and the substrate, enabling the writing operation through the randomization of the magnetization orientation. Additionally, uniform circular polarized light is radiated onto the GaAs substrate, causing a tunneling current to flow, which varies according to the magnetization orientation of the molecules. This tunneling current can be detected to ascertain the magnetization orientation of the thin film.
Another notable patent is a static induction type semiconductor device with multiple source contacts. This surface gate type device includes a source region, gate region, and drain region, with a channel region formed between the drain and source regions. When a bias potential is applied, carriers flow from the source to the drain via the channel. The device features a source electrode and a segmented source contact region, which enhances current gain and minimizes local current concentration.
Career Highlights
Hiroshi Tadano has worked with notable companies such as Toyota Central R&D Labs and Toyoda Automatic Loom Works. His experience in these organizations has contributed to his development as an inventor and innovator in his field.
Collaborations
Tadano has collaborated with esteemed colleagues, including Haruo Takagi and Shinobu Aoki. Their joint efforts have further advanced the research and development of innovative technologies.
Conclusion
Hiroshi Tadano's contributions to memory devices and semiconductor technology highlight his role as a leading inventor. His patents reflect a commitment to innovation and excellence in engineering.