Patent ID: 6214425
Filing Date: 2001-04-10
Classification: H01L,Y10T

Abstract:
A storage box for an object to be protected against physiocemical contamination, wherein the walls comprise a plastics material and the inner surface and/or outer surface of the walls is/are coated with at least one protective layer consisting essentially of a material formula SiO.sub.x N.sub.y H.sub.t, where t<x+y, when x>0 and y>0; t<x, when y=0; and x>y when y=0, obtained by depositing said protective layer by plasma enhanced chemical vapor deposition wherein the source of silicon is a gaseous source of silicon, followed by surface etching the deposited protective layer by contacting the box with a plasma of a gaseous mixture comprising oxygen and fluorine, thereby removing surface carbon contamination wherein said box is substantially impermeable to O.sub.2.