Research on thermal evolution of typical ferroelectric RAM irradiated by femtosecond pulsed laser

Abstract

In order to reveal the temperature evolutionary characteristics of typical ferroelectric RAM (Random Access Memory) irradiated by femtosecond pulsed laser, a physical model of a typical ferroelectric RAM is established. The idea of using a continuous laser instead of a high-energy pulsed laser of the same energy on the laser transmission path was theoretically derived. The physical expression and thermal conduction model of the laser at different positions on the transmission path were simulated by Comsol Multiphysics simulation software. The melting and heat conduction process of the pulsed laser irradiating ferroelectric RAM are simulated, and the laser with different irradiation time is obtained. The temperature field distribution, melting and thermal conduction simulation parameters of the multi-layer target of the ferroelectric RAM are simulated by the femtosecond pulsed laser under the simulation conditions. The results show that the COMSOL Multiphysics simulation can accurately simulate the temperature field evolution of femtosecond pulsed laser irradiating ferroelectric RAM in the simulation experiment of single event effects. Heat radiation of the periphery of the ferroelectric RAM and the bottom of the heat transfer dominates. Thermal radiation transfers less energy to the pins and the periphery. After 5 s under the laser interaction, the temperature distribution of the ferroelectric RAM is stable. The heat conductivity, melting and convection characteristics of the ferroelectric RAM are basically consistent with the experimental results.