Kenji Yasui

Title: Kenji Yasui: Innovator in Memory Testing and Pattern Estimation

Introduction

Kenji Yasui is a prominent inventor based in Tokyo, Japan. He has made significant contributions to the fields of memory testing and pattern estimation, holding a total of 3 patents. His innovative work has been recognized in various technological advancements.

Latest Patents

One of Yasui's latest patents is a memory tester and test method that utilizes a memory tester. This invention includes a first memory, a second memory, an arithmetic circuit, and a determination circuit. The first memory is designed to store scan input data and expected value data, with the scan input data including a don't care bit. The expected value data is obtained by converting the don't care bit into a first predetermined value. The second memory stores scan output data and mask data, which is derived from converting a value of the scan input data, excluding the don't care bit, into a second predetermined value. The arithmetic circuit performs an exclusive or operation between the expected value data and the scan output data. The determination circuit assesses whether the don't care bit of the arithmetic result from the arithmetic circuit has passed or failed by utilizing the mask data.

Another notable patent is a pattern cross-sectional shape estimation system and program. This system comprises a charged particle ray device that includes a scanning deflector for scanning a charged particle beam, a detector for detecting charged particles, and an angle discriminator positioned in front of the detector to discriminate the charged particles to be detected. An arithmetic device generates the luminance of an image and calculates a signal waveform of a designated region on the image using the luminance. This device produces angle discrimination images using signal electrons at various detection angles and estimates the side wall shape of a measurement target pattern.

Career Highlights

Kenji Yasui has worked with notable companies such as Hitachi High-Tech Corporation and Kioxia Corporation. His experience in these organizations has contributed to his expertise in the field of technology and innovation.

Collaborations

Throughout his career, Yasui has collaborated with esteemed colleagues, including Toshiyuki Yokosuka and Hirohiko Kitsuki. These collaborations have further enhanced his contributions to the industry.

Conclusion

Kenji Yasui is a distinguished inventor whose work in memory testing and pattern estimation has led to significant advancements in technology. His innovative patents and collaborations reflect his commitment to pushing the boundaries