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 mm2) within an assembly gap (0.05-0.25 mm) between copper azide and ISC. The proposed method has high applicability for information insurance.
Keywords: energetic materials; information insurance; insurance actuator; physical isolation; physical self-destruction.