Core/Shell Particles for Tamper-Evident Electrical Circuits

The patent applies preliminary anti-action by pre-positioning core/shell particles containing conductive material in strategic locations within the security product. These particles are designed to release their conductive contents upon detection of manipulation attempts, creating an automatic counter-measure that neutralizes the threat before it can compromise the electrical circuit. The conductive material forms short-circuit bridges that disable the circuit as a protective response to detected intrusions.

The patent converts the harmful effect of mechanical manipulation into a beneficial security feature. When someone attempts to manipulate or access the electrical circuit, the mechanical stress causes core/shell particles to rupture and release conductive material that creates short-circuits. This transforms the harmful manipulation attempt into the activation of a protective mechanism that disables the circuit and prevents counterfeiting.

The patent merges the protective function with the existing structure of the security product by incorporating core/shell particles directly into the substrate or adhesive layers that already form part of the product architecture. This integration approach combines multiple functions (structural support, bonding, and tamper protection) into unified layers, avoiding the need for separate protective components and thereby limiting the increase in device complexity.

The patent utilizes parameter changes in the core/shell particles, specifically their mechanical properties and chemical composition. The particles are designed with shells that have specific mechanical strength thresholds and contain conductive materials with controlled release characteristics. When mechanical stress exceeds the shell's threshold, the particle structure changes and releases its conductive contents, providing protection through material parameter changes rather than complex mechanical mechanisms.

The patent applies preliminary action by pre-positioning the core/shell particles and their conductive contents in strategic locations before any manipulation attempt occurs. The particles are distributed within the substrate or adhesive layers in advance, ready to activate their protective function immediately upon detection of mechanical stress. This eliminates the need for complex real-time monitoring systems or active protection mechanisms that would require operational intervention.

The protective mechanism is entirely self-service, requiring no external activation, monitoring, or control systems. The core/shell particles autonomously detect mechanical manipulation through stress-induced shell rupture and automatically respond by releasing conductive material to create short-circuits. This self-activating mechanism maintains circuit integrity without compromising ease of operation, as the protection is passive and only activates in response to actual manipulation attempts.