The SAMCO etcher is a multifunctional etcher that can operate in either the RIE, plasma etch or Downstream plasma modes. There are 3 gases that are plumbed to the tool: Gas1: O2, Gas2: CF4, and Gas3: SF6. The characterized etches allowed in this tool include O2 descum, PhotoResist strip, Silicon-Nitride etch, isotropic silicon etch.