Chiga Ueda

Title: Chiga Ueda: Innovator in Optical Recording Technology

Introduction

Chiga Ueda is a prominent inventor based in Tokyo, Japan, known for his contributions to optical recording technology. With a total of 2 patents, Ueda has made significant advancements in the field, particularly in enhancing data storage capabilities.

Latest Patents

Ueda's latest patents include an innovative optical disk designed to have a large storage capacity. This magneto-optical disk features a recording film on a substrate that defines a data area, which is divided into multiple zones in the radial direction. Each zone contains several physical tracks, with the number of sectors per physical track increasing toward the outer edge of the disk. This design improves the reliability of recording and reproducing characteristics, especially in specified zones that typically suffer from inferior physical characteristics.

Another notable patent is for a high-density optical recording method and recording medium. This method involves recording and reading information by irradiating a laser beam at a wavelength of not more than 500 nm onto a recording layer of an optical disc. The disc has a track pitch between 0.4 µm and 0.9 µm, and the laser beam is incident from the disc substrate side using an objective lens with a numerical aperture of 0.55 to 0.70. The recording area is a flat area without a guide groove for each track, ensuring optimal performance.

Career Highlights

Chiga Ueda is currently employed at Mitsubishi Chemical Corporation, where he continues to innovate in the field of optical technology. His work has been instrumental in pushing the boundaries of data storage solutions.

Collaborations

Ueda has collaborated with notable coworkers, including Hidemi Yoshida and Hideharu Takeshima, contributing to various projects that enhance optical recording technologies.

Conclusion

Chiga Ueda's contributions to optical recording technology have established him as a key figure in the industry. His innovative patents reflect a commitment to improving data storage solutions, making a lasting impact on the field.