MEMS Circuit Breaker Isolation Circuit for High-Voltage Switching

The patent introduces a mechanical stopper as an intermediary element between the conductive beam and the substrate. This stopper serves as a mediator that absorbs mechanical stress during switching operations, preventing direct stress transmission to the conductive beam structure. The stopper acts as a buffer that protects the vulnerable conductive beam from degradation while maintaining the switching function, thereby resolving the contradiction between reliability and operational lifespan.

The patent extracts the stress-absorbing function from the conductive beam structure and places it in a separate mechanical stopper element. By taking out the stress management function, the conductive beam can perform its primary switching function without bearing excessive mechanical stress. The stopper is positioned to engage during beam tilting and absorb the mechanical stress, allowing the beam to tilt freely for switching while the stopper handles the stress, thus resolving the contradiction between ease of operation and mechanical stress.

The patent applies beforehand cushioning by positioning the mechanical stopper to engage with the conductive post before excessive stress can damage it. The stopper acts as a pre-positioned protective element that limits the range of motion and prevents stress concentration from exceeding the post's strength limits. This allows the post to be positioned optimally for electrical isolation while the stopper provides prior protection against stress-induced failure, resolving the contradiction between electrical isolation and post strength.