Patent ID: 7850061

Claim:
A method for making a component including fluid flow channels ( 18 ) formed by making a plurality of hollow grooves ( 12 ) in at least one face ( 21 ) of a base plate ( 10 ) so that the grooves have open top sides and with the base plate having opposite ends wherein the method is characterized by: sealably blocking the open top side of each of the grooves ( 12 ) by welding a plurality of strips ( 16 ) corresponding in number to the number of grooves, for forming said fluid flow channels ( 18 ) with open ends at least at one of the opposite ends of the base plate; placing a lid ( 22 ) onto the face ( 21 ) of the base plate ( 10 ) such that the lid ( 22 ) covers each and every strip ( 16 ); and diffusion welding said lid ( 22 ) onto the face ( 21 ) of the base plate ( 10 ) using hot isostatic compression so that a pressurized gas can flow from said open ends at least at one of the opposite ends of the base plate through said fluid flow channels ( 18 ).