Yoshihiko Aiba

Title: Innovations of Yoshihiko Aiba

Introduction

Yoshihiko Aiba is a notable inventor based in Kanagawa, Japan. He has made significant contributions to the field of projection technology, holding 2 patents that showcase his innovative spirit and technical expertise.

Latest Patents

Aiba's latest patents include a "Projection type exposure method and apparatus." This invention comprises an exposure illumination light source, an exposure illumination system, a mask or reticle with an original pattern, an optical projection system, a stage for retaining the exposed matter, and a mechanism for finely moving the stage along the exposure optical axis. The apparatus features an exposure detection pattern area on the mask, detection illumination means for projecting light onto the exposure detection pattern area, and exposure detection means for detecting the transmitted or reflected light. This complex system allows for precise control and detection during the exposure process.

Another significant patent is the "Method and apparatus for detecting focal plane." This invention measures the image plane of a test pattern projected onto a sample's surface to achieve precise alignment for subsequent exposure. The test pattern is provided on a member with a conjugate surface, and the illumination detecting unit has at least three optical sensors. By moving the stage three-dimensionally, the outputs from the optical sensors are processed to obtain the image plane accurately.

Career Highlights

Yoshihiko Aiba is currently employed at Hitachi, Ltd., where he continues to develop innovative technologies. His work has significantly impacted the field of optical projection and exposure methods, enhancing the capabilities of various applications.

Collaborations

Aiba has collaborated with notable colleagues, including Akira Inagaki and Yoshitada Oshida. Their combined expertise has contributed to advancements in their respective fields.

Conclusion

Yoshihiko Aiba's contributions to projection technology through his patents reflect his dedication to innovation and excellence. His work continues to influence the industry and inspire future advancements.