Riichiro Shirota

Title: The Innovations of Riichiro Shirota

Introduction

Riichiro Shirota is a notable inventor based in Hsinchu, Taiwan. He has made significant contributions to the field of semiconductor technology, holding a total of four patents. His work focuses on memory devices and their manufacturing processes, showcasing his expertise in this critical area of innovation.

Latest Patents

Shirota's latest patents include a memory device using a semiconductor element. This memory device features pages composed of memory cells arranged in columns on a substrate. The device performs a page write operation that retains a hole group formed by impact ionization inside a channel semiconductor layer. Additionally, a page erase operation discharges the hole group from the channel semiconductor layer. The design includes a first impurity layer connected to a source line, a second impurity layer to a bit line, and multiple gate conductor layers for selection and plate lines. The memory cell group selected in at least one page reads data to the bit line, while zero volts or less is applied to the plate line of the memory cell connected to an unselected page.

Another significant patent is for a semiconductor memory device and its manufacturing method. This dynamic flash memory is created by stacking various layers on a P-layer substrate. The process involves forming holes and semiconductor pillars, as well as gate insulating layers and gate conductor layers embedded in the holes. This innovative approach enhances the performance and efficiency of semiconductor memory devices.

Career Highlights

Riichiro Shirota is currently employed at Unisantis Electronics Singapore Pte. Ltd. His work at this company has allowed him to further develop his expertise in semiconductor technologies and contribute to advancements in memory devices.

Collaborations

Shirota has collaborated with notable coworkers, including Koji Sakui and Nozomu Harada. Their combined efforts in the field of semiconductor technology have led to significant innovations and advancements.

Conclusion

Riichiro Shirota's contributions to semiconductor technology through his patents and work at Unisantis Electronics Singapore Pte. Ltd. highlight his role as a leading inventor in the field. His innovative approaches to memory devices continue to influence the industry and pave the way for future advancements.