Patent ID: 9150959
Filing Date: 2015-10-06
Classification: B03C,B05D,B81B,B81C,C23C

Abstract:
1. A method of passivating the surfaces of a micromechanical device, the method comprising: providing a micromechanical device within a sealed chamber; pulling a partial vacuum in the chamber; introducing a vapor consisting of passivants to an inlet to the chamber having a filter-diffuser located thereat, the passivants include perfluordecanoic acid (PFDA); simultaneously, at the filter-diffuser, filtering the vapor arriving at the inlet and injecting the vapor in multiple directions to uniformly distribute the vapor within the chamber, the vapor being injected through a manifold having a cylindrical body portion coupled to a central cylindrical cavity, wherein filters are attached to the periphery thereof and extend radially outward from the body portion; flowing the vapor from the manifold to the central cylindrical cavity and radially outward through the filters and into the chamber; filtering the vapor at the inlet such that pores in the filter walls allow individual PFDA molecules to flow through the filter walls but that filter out larger PFDA particles; and allowing the vapor to react with the surfaces of the micromechanical device for a predetermined time.