This inventor holds 7 USPTO granted patents. Top assignee: Hitachi, Ltd.. Active years: 1984-1992.
Company Filing History:
Years Active: 1984-1992
Title: Kazumitsu Nakamura: Innovator in Charged Particle Beam Technology
Introduction
Kazumitsu Nakamura is a prominent inventor based in Katsuta, Japan. He has made significant contributions to the field of charged particle beam technology, holding a total of 7 patents. His work focuses on enhancing the precision and efficiency of electron beam lithography and projection alignment systems.
Latest Patents
Nakamura's latest patents include a charged particle beam projection aligner that features a position detector. This innovative aligner comprises a particle beam source, a sectional shape forming device, an electron lens, and a deflector. It also includes a wafer mounted on an XY table and a vacuum column housing these devices. The aligner is equipped with an optical device that irradiates a light beam in the same direction as the particle beam, minimizing offset errors in pattern alignment. Another notable patent is an electron beam lithography apparatus that incorporates a device for correcting the beam. This apparatus features an upper and lower aperture, a deflector, and an optical lens that converges the electron beam onto a specimen. It measures reflected electrons from position marks to calculate correction values, ensuring high accuracy in the shapes of the electron beam.
Career Highlights
Kazumitsu Nakamura is currently employed at Hitachi, Ltd., where he continues to develop cutting-edge technologies in the field of electron beam lithography. His work has significantly advanced the capabilities of lithographic processes, making them more precise and efficient.
Collaborations
Throughout his career, Nakamura has collaborated with notable colleagues, including Hajime Hayakawa and Hiroyuki Itoh. These collaborations have fostered innovation and contributed to the development of advanced technologies in their field.
Conclusion
Kazumitsu Nakamura's contributions to charged particle beam technology and electron beam lithography have established him as a leading inventor in his field. His innovative patents and ongoing work at Hitachi, Ltd. continue to shape the future of lithographic processes.