Thermal Dissipation & Decoupling Capacitor Layout for STM32 LQFP Packages

High-speed microcontrollers like the STM32F407 require careful attention to decoupling capacitance and ground plane stitching to prevent ground bounce and EMI emissions. In this engineering note, we break down optimal trace geometry, low-ESR ceramic capacitor selection, and solder mask expansion tolerances for high-reliability industrial electronics.