Patent ID: 7572096

Claim:
A vacuum pump comprising: a pump case; a pump section that is disposed in the pump case and that performs an evacuating operation by which gas molecules in a vacuum chamber are sucked into and exhausted from the pump case, the pump section having at least one component that is heated during operation of the vacuum pump and that defines a flow path through which the gas molecules flow prior to being exhausted from the pump case; at least one nickel alloy layer disposed on a surface of the component of the pump section for increasing a resistance of the component to corrosion due to a corrosive effect of the gas molecules flowing through the flow path; and a nickel oxide formed on a surface of the nickel alloy layer for increasing a quantity of heat radiated from the surface of the component when the component is heated during operation of the vacuum pump; wherein the at least one nickel alloy layer comprises a laminated structure of a first nickel alloy layer disposed on a surface of the component and a second nickel alloy layer disposed on a surface of the first nickel alloy layer; wherein the nickel oxide is formed on a surface of the second nickel alloy layer; and wherein the nickel oxide is formed by forced oxidation of the surface of the nickel alloy layer via reaction of an oxidizing agent on the surface of the nickel alloy layer.