Development of adiabatic superconductor integrated circuits using niobium nitride

2017 Fiscal Year Final Research Report

• Project/Area Number: 16K18089
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Electron device/Electronic equipment
• Research Institution: Yokohama National University
• Principal Investigator: Takeuchi Naoki 横浜国立大学, 先端科学高等研究院, 特任教員(准教授) (00746472)
• Research Collaborator: TERAI Hirotaka 情報通信研究機構, 未来ICT研究所フロンティア創造総合研究室, 上席研究員 ; MIYAJIMA Shigeyuki 情報通信研究機構, 未来ICT研究所フロンティア創造総合研究室, 研究員 ; YOSHIKAWA Nobuyuki 横浜国立大学, 大学院工学研究院, 教授
• Project Period (FY): 2016-04-01 – 2018-03-31
• Keywords: 磁束量子パラメトロン / 断熱ロジック / 窒化ニオブ / 超伝導集積回路

Outline of Final Research Achievements

We investigated adiabatic superconductor logic, or AQFP logic, using niobium nitride (NbN) to achieve superconductor integrated circuits that can operate at higher temperature than 4 K. We designed NbN-AQFP logic gates using the NbN integrated-circuit fabrication process provided by the National Institute of Information and Communications Technology (NICT). We designed the mask layout of a test circuit that includes basic NbN-AQFP logic gates and fabricated it using the NICT process. We also evaluated the operational stability and energy dissipation of NbN-AQFP gates. Our results indicate the advantage of NbN-AQFP gates: small circuit area; high operational stability; small energy dissipation.

Free Research Field

超伝導エレクトロニクス