Minoru Yoshioka

Title: Minoru Yoshioka: Semiconductor Device Inventor

Introduction

Minoru Yoshioka is an inventor associated with Shiki, Japan. His work includes semiconductor technologies, particularly vertical power MOSFETs and optically driven devices. His patent record includes 2 patents.

Latest Patents

Yoshioka’s listed patents describe two semiconductor innovations:

- **Vertical power MOSFET.** This design uses a semiconductor substrate with low- and high-resistivity layers, along with source, drain, channel, and gate structures. A convex portion at the interface between the substrate layers projects toward the high-resistivity layer, forming part of the device’s structure for controlling current between source and drain.

- **Optically driven semiconductor device.** This invention describes vertical field-effect transistors formed on a shared semiconductor substrate, with optoelectric transducers positioned above them on an insulating film. Related configurations use a solar cell above a transistor, with the cell made from polycrystalline or monocrystalline silicon grown by chemical vapor deposition. The disclosure also describes optically coupled semiconductor relay devices using these designs.

Career Highlights

Yoshioka’s listed company affiliations include Sharp Kabushiki Kaisha. The patent descriptions reflect work on power semiconductor structures and devices that combine electronic and optical components.

Collaborations

His listed coworkers include Toshiaki Miyajima and Mitsuo Matsunami.

Conclusion

Minoru Yoshioka’s patent work spans vertical power MOSFETs and optically driven semiconductor devices, highlighting contributions to semiconductor design and optoelectronic applications.