Vol. 50, No. 4（特集解説: 6G時代に向けた環境に優しい静電気対策材料）

レター

静電引上成長におけるMo線先端部の構造変化
Structural Changes at the Tip of a Molybdenum Wire During Electrostatic-Stress-Driven Pull-up Growth

西村　高志, 松本　乃武
Takashi NISHIMURA and Nobu MATSUMOTO

静電気学会誌　第50巻　第4号　pp. 146 - 149
2026年3月9日受付
2026年5月25日受理
DOI   https://doi.org/10.34342/iesj.2026.50.3.146

Abstract
The structural changes in the tip of a polycrystalline Mo wire were observed using a long-focus microscope whilst applying a high voltage during laser heating. Most regions of the Mo wire tip remained in a softened state below the melting point without melting. The softened Mo repeatedly moved up and down due to electrostatic stress and surface tension. Applying above -24 kV resulted in the formation of a Taylor cone-jet at the tip of the Mo wire. After laser heating at high voltage, the tip of the Mo wire was sharpened. This study clarified the behavior of the Mo wire tip during electrostatic-stress-driven pull-up growth and also demonstrated the potential for sharpening the Mo wire tip.

Keywords
静電引上成長，Mo 探針