ProTEK® B3 Coatings Alkaline protective coating

ProTEK<sup>®</sup> B3 coating

ProTEK® B3 thin films are spin-applied polymeric coating systems that provide temporary wet-etch protection for CMOS MEMS circuitry during alkaline or acid etches. ProTEK® B materials offer protection from alkaline solutions such as KOH and TMAH for extended bath etches.

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With ProTEK® B3, you can:
  • Protect delicate front-side circuitry during back-side bulk micromachining
  • Increase yield by minimizing front side damage caused by alkaline etch solution punch through during wet etch
  • Improve throughput by reducing labor and process time associated with mechanical clamps and increasing the number of wafers per etch bath
Apply ProTEK® B3 coating instead of mechanical clamps to:
  • Protect CMOS circuitry or MEMS structures
  • Create SiN membranes last
  • Create through-silicon vias (TSVs)