Feng Hengzhen, Lou Wenzhong, He Bo, Lv Sining, Su Wenting
School of Mechatronical Engineering, Beijing Institute of Technology, Beijing 100811, China.
Micromachines (Basel). 2022 May 31;13(6):875. doi: 10.3390/mi13060875.
Detonation waves released by energetic materials provide an important means of physical self-destruction (Psd) for information storage chips (ISCs) in the information insurance field and offer advantages that include a rapid response and low driving energy. The high electrical sensitivity of energetic materials means that they are easily triggered by leakage currents and electrostatic forces. Therefore, a Psd module based on a graphene-based insurance actuator heterogeneously integrated with energetic materials is proposed. First, the force-balance relation between the electrostatic van der Waals force and the elastic recovery force of the insurance actuator's graphene electrode is established to realize physical isolation and an electrical interconnection between the energetic materials and the peripheral electrical systems. Second, a numerical analysis of the detonation wave stress of the energetic materials in the air domain is performed, and the copper azide dosage required to achieve reliable ISC Psd is obtained. Third, the insurance actuator is prepared via graphene thin film processing and copper azide is prepared via an in situ reaction. The experimental results show that the energetic materials proposed can release physical isolation within 14 μs and can achieve ISC Psd under the application of a voltage signal (4.4-4.65 V). Copper azide (0.45-0.52 mg) can achieve physical damage over an ISC area (23.37-35.84 mm) within an assembly gap (0.05-0.25 mm) between copper azide and ISC. The proposed method has high applicability for information insurance.
含能材料释放的爆轰波为信息保险领域中的信息存储芯片（ISC）提供了一种重要的物理自毁（Psd）手段，并具有响应迅速和驱动能量低等优点。含能材料的高电敏感性意味着它们很容易被漏电流和静电力触发。因此，提出了一种基于与含能材料异质集成的石墨烯基保险致动器的Psd模块。首先，建立保险致动器石墨烯电极的静电范德华力与弹性恢复力之间的力平衡关系，以实现含能材料与外围电气系统之间的物理隔离和电气互连。其次，对空域中含能材料的爆轰波应力进行数值分析，得到实现可靠ISC Psd所需的叠氮化铜用量。第三，通过石墨烯薄膜加工制备保险致动器，并通过原位反应制备叠氮化铜。实验结果表明，所提出的含能材料能够在14 μs内实现物理隔离，并在施加电压信号（4.4 - 4.65 V）时实现ISC Psd。叠氮化铜（0.45 - 0.52 mg）能够在叠氮化铜与ISC之间的装配间隙（0.05 - 0.25 mm）内，对ISC区域（23.37 - 35.84 mm）造成物理损坏。所提出的方法对信息保险具有高度适用性。
