Patent ID: 8727727

Claim:
A component comprising a substrate comprising an outer surface and an inner surface, wherein the inner surface defines at least one hollow, interior space, wherein the outer surface defines one or more grooves, wherein each groove extends at least partially along the outer surface of the substrate and has a base, wherein one or more access holes are formed through the base of a respective groove, to connect the groove in fluid communication with respective ones of the at least one hollow interior space; and a coating comprising one or more layers disposed over at least a portion of the outer surface of the substrate, wherein the one or more grooves and the coating together define one or more channels for cooling the component, wherein one or more trenches are formed through one or more layers of the coating, wherein the channels are at least one of spaced closer together near a second end of the trench than they are near a first end of the trench or smaller in volume near the first end of the trench than at least some of the cooling channels near the second end of the trench and wherein the one or more trenches at least partially define at least one exit region for the one or more cooling channels.