Ryoichi Yamashita

Title: Ryoichi Yamashita’s Semiconductor Layout Design Patents.

Introduction

Ryoichi Yamashita is an inventor associated with Kawasaki, Japan, and Fujitsu Corporation. His patent work includes methods and tools for supporting the layout design of semiconductor integrated circuits. The supplied information lists 9 patents in his portfolio.

Latest Patents

“Layout Design Method, Apparatus and Storage Medium” describes a layout design support apparatus that divides a semiconductor integrated circuit module into smaller modules. It then supports detailed layout design by determining the placement of cells and wiring within each smaller module.

“Design Support Apparatus, Design Support Program and Design Support Method for Supporting Design of Semiconductor Integrated Circuit” concerns checking the positions of drivers and receivers in each circuit net. When a driver lies outside a defined region enclosing its receivers, the apparatus determines a base point inside that region and arranges diagonal wiring to connect the driver to the base point, provided the base point can be connected to a receiver using vertical or horizontal wiring.

Career Highlights

Yamashita’s listed inventions focus on computer-aided semiconductor design, particularly module-level layout and the placement and routing of circuit connections. These approaches address the organization of cells and wiring during integrated-circuit design.

Collaborations

The supplied information identifies Noriyuki Ito and Tomoyuki Isomura as Yamashita’s coworkers. It does not specify their roles in the listed patents.

Conclusion

Ryoichi Yamashita’s patent portfolio reflects work on semiconductor layout design support, including methods for dividing circuit modules and arranging connections between drivers and receivers.