Location History:
- Takasaki, JA (1976)
- Gunma, JP (1984)
- Harunamachi, JP (1983 - 1986)
Company Filing History:
27 out of 1,767 
1 out of 58,131 
Years Active: 1976-1986
Title: **Nobutatsu Yamaoka: Innovator in Low Temperature Sintered Ceramic Materials**
Introduction
Nobutatsu Yamaoka is a renowned inventor based in Harunamachi, Japan, who has contributed significantly to the field of ceramic materials. With a remarkable portfolio of 27 patents, he has focused on developing innovative manufacturing techniques that enhance the performance and cost-effectiveness of capacitors.
Latest Patents
Yamaoka's most recent innovations include a method for manufacturing low temperature sintered ceramic materials, which are capable of sintering at sufficiently low temperatures. This advancement allows for the use of lower-cost base metals as electrode materials in capacitor fabrication. The primary composition consists of a formula expressed as Ba.sub.k-x M.sub.x O.sub.k TiO.sub.2, where M represents either magnesium or zinc, with k and x falling within the ranges of 1.00 to 1.04 and 0.02 to 0.05, respectively.
Furthermore, a minor proportion of a mixture containing lithium oxide, silicon dioxide, and potentially one of barium oxide, calcium oxide, or strontium oxide is added. The method facilitates the creation of coherently bonded dielectric bodies for capacitors, where the mixture is sintered in a neutral atmosphere and reheated in an oxidative atmosphere at temperatures ranging from 1050°C to 1200°C. This innovative process enables the co-sintering of moldings with base metal electrodes without previous complications.
Career Highlights
Throughout his career, Yamaoka has made significant contributions while working at prominent companies such as Taiyo Yuden Co., Ltd. and Sony Corporation. His expertise in ceramic materials has propelled advancements in electrical components, significantly benefiting various technological applications.
Collaborations
Yamaoka has collaborated with talented individuals, including Kiyoshi Murase and Takeshi Wada, showcasing the importance of teamwork in innovation and the development of new materials in the field of electronics.
Conclusion
Nobutatsu Yamaoka continues to push the boundaries of material science with his innovative approaches to low temperature sintering. His impactful patents contribute not only to the realm of capacitors but also foster further advancements in the electronics industry. Yamaoka's work exemplifies the critical role inventors play in shaping modern technology and improving manufacturing processes.