A fuel cell system with a proton exchange membrane. Coupling halfs are affixed to coupler ports in the manifold. When the etch exposes the insulator at the via bottoms, the insulator is etched slower than the wafer material. Each controller node possesses a unique identifier. A method of fabrication and a memory unit are disclosed. Then, intersect determination between a ray generated based on the ray tracing method and an object on the virtual space is executed.