Patent ID: 8216663

Claim:
A surface-modified member comprising at least one member selected from the group consisting of a ceramic and a metal and preventing an adhesion of contaminants, which is free from an attachment of ashes in an ash test and has a decrease in a carbon atomic concentration and an increase in an oxygen atomic concentration on the modified surface thereof compared with a surface of an untreated member in an X-ray photo electron spectrum analysis, wherein the surface-modified member comprises at (1) least one element selected from the group consisting of an element of Group 4 of the Periodic Table of Elements, an element of Group 5 of the Periodic Table of Elements, an element of Group 6 of the Periodic Table of Elements, an element of Group 7 of the Periodic Table of Elements, an element of Group 9 of the Periodic Table of Elements, an element of Group 10 of the Periodic Table of Elements, an element of Group 11 of the Periodic Table of Elements, an element of Group 13 of the Periodic Table of Elements and an element of Group 14 of the Periodic Table of Elements, (2-1) the member comprising the ceramic or an alumite has any one of the following carbon atomic concentrations: 10 to 50% at an etching time of 0 second, 7 to 35% at an etching time of 15 seconds, 5 to 30% at an etching time of 30 seconds, and 3 to 25% at an etching time of 60 seconds; and any one of the following oxygen atomic concentrations: 30 to 60% at an etching time of 0 second, 35 to 62% at an etching time of 15 seconds, 43 to 63% at an etching time of 30 seconds, and 45 to 65% at an etching time of 60 seconds when a depth profile of the surface of the member is analyzed by an X-ray photo electron spectrum at an etching speed of 5 nm/min, or (2-2) the member comprising the metal has any one of the following oxygen atomic concentrations: 32 to 45% at an etching time of 0 second, 28 to 42% at an etching time of 15 seconds, 22 to 36% at an etching time of 30 seconds, and 13 to 25% at an etching time of 60 seconds when the depth profile of the surface of the member is analyzed by the X-ray photo electron spectrum at an etching speed of 5 nm/min, (3) the surface-modified member is a member contacting with or exposing to a processing space under a reduced pressure or a processing space containing floating or flying particles of an apparatus or a chamber for surface processing by a vapor phase method comprising a physical vapor deposition (PVD), a chemical vapor deposition (CVD), an ion beam mixing, an etching, or an impurity doping, and (4) the surface-modified member has been treated by a water vapor consisting essentially of a superheated water vapor having a temperature of not lower than about 300° C. under air.