You're on the factory floor, an engineer just handed you a prototype that's overheating again. The heat sink design looks good, the fan is running, yet the hot spot persists. Someone from procurement pulls out their phone and frantically types "Are graphite sheets electrically conductive?" as a starting point. Instinct is often correct, but the nuance matters. The answer here isn't just a direct "yes" or "no." Traditionally, graphite in bulk form sports high out-of-plane resistivity (potentially making an "open circuit" relative to Z-axis current paths), which complicates first-glance impression. But that picture flips when seeing the specific manufacturing: most flexible graphite gasket and sheet supply aim for anisotropic approach. Meaning one direction: conductive enough to spread GHz-level interference to ground/shield plane; compressed-foil method also shows the in-plane conductivity comparable to the die-to-attach, thermal-plane handling both heat with controlled cross between faces.
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