Company Filing History:
Years Active: 1980-1996
Title: Hisashi Maejima: Innovator in Semiconductor Technology
Introduction
Hisashi Maejima is a prominent inventor based in Higashiyamato, Japan. He has made significant contributions to the field of semiconductor technology, holding a total of 10 patents. His work focuses on improving the efficiency and accuracy of semiconductor fabrication processes.
Latest Patents
One of Hisashi Maejima's latest patents is a semiconductor integrated circuit device fabrication method. This technique enhances the accuracy of element qualities by considering the interaction of element quality parameters during the quality control of semiconductor fabrication processes. It also improves product yield estimation accuracy, thereby increasing production efficiency. The method involves setting an initial value for a membership function and expressing multiple element quality parameters through membership functions in fuzzy control. This automation connects a computer with various measuring instruments and processors, allowing for better control of the fabrication process.
Another notable patent is the method of producing a wafer with a curved notch. This innovation features chamfered bent portions in the joint regions of the wafer, which helps prevent chipping. The method ensures that films with desired characteristics can be applied to the wafer's surface during processes such as coating with photoresist and forming epitaxially grown layers.
Career Highlights
Hisashi Maejima is currently employed at Hitachi, Ltd., where he continues to develop innovative solutions in semiconductor technology. His work has significantly impacted the efficiency and quality of semiconductor manufacturing.
Collaborations
Hisashi has collaborated with notable colleagues, including Susumu Komoriya and Hiroshi Nishizuka. Their combined expertise has contributed to advancements in semiconductor fabrication techniques.
Conclusion
Hisashi Maejima's contributions to semiconductor technology exemplify the importance of innovation in enhancing manufacturing processes. His patents reflect a commitment to improving quality and efficiency in the industry.