Location History:
- Kadoma, JP (2004)
- Katano, JP (1998 - 2013)
- Osaka, JP (2004 - 2020)
Company Filing History:
6 out of 16,453 
4 out of 1,623 
4 out of 855 
Years Active: 1998-2020
Title: Kenji Tsubaki: Innovator in Epitaxial Substrates and Ultraviolet Light Emitting Elements
Introduction
Kenji Tsubaki is a prominent inventor based in Osaka, Japan. He has made significant contributions to the field of materials science, particularly in the development of epitaxial substrates and ultraviolet light emitting elements. With a total of 14 patents to his name, Tsubaki's work has had a substantial impact on various technological advancements.
Latest Patents
One of Tsubaki's latest patents involves an epitaxial substrate that features a single crystal substrate with projections arranged in an array on a plane. Each projection is designed with a conical or pyramidal shape that tapers in a normal direction to the plane. The AlN layer in this patent includes a first AlN crystal that covers both the plane and the projections, with the tips of the projections being exposed. Additionally, second AlN crystals protrude from the tips of the projections, taking on a column shape whose cross-sectional area increases with distance from the tip. A third AlN crystal interconnects the ends of the second AlN crystals, opposite the single crystal substrate.
Another notable patent by Tsubaki is for an ultraviolet light emitting element. This invention comprises a light emitting layer, a cap layer, and an electron barrier layer. The light emitting layer features a multi-quantum well structure that includes barrier layers made of a first AlGaN layer and well layers made of a second AlGaN layer. The electron barrier layer consists of at least one first p-type AlGaN layer and at least one second p-type AlGaN layer. The cap layer, positioned between the first p-type AlGaN layer and one of the well layers, is a third AlGaN layer with a specific Al composition ratio.
Career Highlights
Throughout his career, Kenji Tsubaki has worked with notable companies such as Panasonic Corporation and Matsushita Electric Works, Ltd. His experience in these organizations has allowed him to refine his skills and contribute to groundbreaking innovations in the field of electronics and materials science.
Collaborations
Tsubaki has collaborated with esteemed colleagues, including Takayoshi Takano and Hideki Hirayama. These partnerships have fostered a collaborative environment that has led to the advancement of various projects and patents.
Conclusion