Akira Hamakawa

Title: Akira Hamakawa: Semiconductor Memory Inventions

Introduction

Akira Hamakawa is an inventor associated with Tokyo, Japan, and Mitsubishi Electric Corporation, formerly known as Mitsubishi Denki Kabushiki Kaisha. His listed patent work focuses on semiconductor memory systems designed to preserve data and prevent erroneous changes. Hamakawa is credited with 3 patents.

Latest Patents

One of Hamakawa’s listed inventions, “Memory Control Apparatus Having Data Retention Capabilities,” uses separate memory arrays and sense amplifiers to detect data dissipation. When the detection circuit identifies a risk, an interrupt control circuit can pause the CPU, while memory-control circuitry overwrites data in the primary array.

Another invention, “Semiconductor Memory Capable of Preventing Erroneous Inversion of Data,” addresses charge loss in floating-gate memory cells. Its detection sense amplifiers are configured to reveal signs of potential data inversion before the read amplifiers would register an erroneous value, allowing the system to prevent the intended data from being corrupted.

Career Highlights

Hamakawa’s described patent contributions center on memory reliability. The inventions use detection circuitry and coordinated control operations to identify data-retention problems and protect stored information.

Collaborations

Hamakawa’s listed coworkers include Kazuya Sugita and Tsuyoshi Morita. The available information identifies these colleagues but does not specify their roles in the cited inventions.

Conclusion

Akira Hamakawa’s patent work at Mitsubishi Electric Corporation highlights approaches to detecting memory degradation and safeguarding stored data.