Most materials that can withstand the deposition process (being in a vacuum chamber) can be coated with parylene. Materials such as paper, plastic, ceramics, chromium, stainless steel, and silicon can all handle parylene. Types of parylene coating are rapidly evolving to match technological expansion in the medical industry. In this industry alone, parylene coating is used on countless devices, including electrosurgical devices, pacemakers, heart-pumps, electrically powered surgical instruments, and stents.