Patent ID: 7252480
Filing Date: 2007-08-07
Classification: C23C

Abstract:
1. A method for generating an internal pack coating having different, controlled thicknesses, said method comprising: partially filling a cavity of an object to be coated with a first powder having a first formulation so that the first powder settles into the cavity and contacts a first preselected portion of a surface of the cavity and leaves a remaining space within the cavity; filling at least a portion of the remaining space within the cavity with a second powder having a second formulation different from the first formulation, so that the first portion of the surface of the cavity is in contact with the first powder and a second, different preselected portion of the surface of the cavity is in contact with the second powder; and heating the object with the first powder and the second powder therein to thereby produce a coating of the internal cavity having different coating thicknesses over the first portion of the surface of the cavity and the second portion of the surface of the cavity.