Fracturable films of semidried molecules and colloids for printed electronics

2021 Fiscal Year Final Research Report

• Project/Area Number: 19K05134
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Review Section: Basic Section 27010:Transport phenomena and unit operations-related
• Research Institution: National Institute of Advanced Industrial Science and Technology
• Principal Investigator: Kusaka Yasuyuki 国立研究開発法人産業技術総合研究所, エレクトロニクス・製造領域, 主任研究員 (00738057)
• Co-Investigator(Kenkyū-buntansha): 石神 徹 広島大学, 先進理工系科学研究科(工), 准教授 (70595850)
• Project Period (FY): 2019-04-01 – 2022-03-31
• Keywords: 微細印刷 / 付着 / 破壊 / 離散要素法 / レオロジー / 半固体電解質 / イオン液体

Outline of Final Research Achievements

In this research, fracture properties of semidried ink layers used in high-resolution printing for electronic device fabrications such as reverse offset printing and adhesion contrast planography were investigated in detail. First, patterning process in adhesion contrast planography wherein the fracture and separation of the nanoparticle layers take place was simulated by discrete element methods. The simulation result was verified by a theoretical model and qualitatively agreed with experimental data. Second, the rheology, fracture and adhesion properties of semidried layers were characterized and related to an optimal volume fraction in a semidried state for printing. Lastly, a printable semisolid electrolyte ink was developed by using ionic liquid and silica nanoparticles　and applied to the fabrication of micro-supercapacitors.

Free Research Field

印刷エレクトロニクス

Academic Significance and Societal Importance of the Research Achievements

本研究は、各種機能性材料を精密にパターニングする印刷技術に関してその学理と材料拡充を目指したもので、フレキシブルデバイス等の人と親和性の高い電子デバイスの実現ならびに低コスト製造プロセスをによるＩｏＴ社会の実現に資するものと考えている。液体から固体へと遷移する濃厚系コロイド分散体の薄膜を扱っており、薄膜転写と粘弾塑性の関係に新たな知見を与えるものである。