Makoto Hosoba

Title: Innovations by Makoto Hosoba in Light-Emitting Technology

Introduction

Makoto Hosoba is a prominent inventor based in Kanagawa, Japan. He has made significant contributions to the field of light-emitting technology, holding a total of 12 patents. His work focuses on improving the efficiency and reliability of light-emitting elements and display devices.

Latest Patents

One of Hosoba's latest patents addresses the challenges associated with light-emitting elements. The invention tackles the issue of low light extraction efficiency caused by the difference in refractive index between the substrate or moisture barrier layer and air. Additionally, it resolves problems related to peeling or cracking of the moisture barrier layer, which can compromise the reliability and lifespan of the light-emitting element. The patented light-emitting element consists of a pixel electrode, an electroluminescent layer, a transparent electrode, a passivation film, a stress-relieving layer, and a low refractive index layer, all arranged in a sequential stack. The stress-relieving layer is designed to prevent peeling of the passivation film, while the low refractive index layer reduces the reflectivity of light emitted from the electroluminescent layer into the air. This innovation results in a light-emitting element that boasts high reliability and a long operational lifetime, along with a display device that utilizes this advanced light-emitting technology.

Career Highlights

Makoto Hosoba is associated with Semiconductor Energy Laboratory Co., Ltd., where he continues to develop cutting-edge technologies in the semiconductor field. His work has garnered attention for its practical applications and contributions to the advancement of display technologies.

Collaborations

Throughout his career, Hosoba has collaborated with notable colleagues, including Hisao Ikeda and Hiroki Ohara. These partnerships have fostered innovation and have been instrumental in the development of new technologies in the semiconductor industry.

Conclusion

Makoto Hosoba's contributions to light-emitting technology exemplify the impact of innovative thinking in the field of semiconductors. His patents not only address existing challenges but also pave the way for future advancements in display devices.