Fluid ejection device

A method for securely anchoring a barrier layer to a substrate in a printhead comprising:

• applying at least one layer comprised of metal to a substrate having a fluid ejector;
• forming, with said layer, at least one extending metallic anchor member;
• and
• covering said anchor member with a layer of at least one fluid barrier material, said anchor member securely attaching said ink barrier material to said substrate.

A method of forming a fluid ejection device comprising:

• disposing a mechanical intercoupling structure on a substrate at least one fluid ejector thereon;
• disposing a chamber layer over said substrate, wherein side walls of an ejection chamber are defined with the chamber layer;
• substantially embedding said mechanical intercoupling structure with the chamber layer;
• and
• encapsulating the mechanical intercoupling structure with the substrate and the chamber layer.

A method of coupling a barrier layer to a substrate of a fluid ejection device comprising:

• positioning at least one metallic anchor member on a substrate;
• positioning a layer of barrier material over the substrate and the at least one metallic anchor member;
• substantially embedding said at least one metallic anchor member with the layer of barrier material;
• and
• encapsulating the at least one metallic anchor member with the substrate and the barrier layer.

The method of claim wherein said metallic anchor member includes:

• a top surface defining a top surface width;
• a bottom surface;
• and
• a central portion between the top surface and the bottom surface defining a width that is less than the top surface width.

A method of forming a fluid ejection cartridge comprising:

• fluidically coupling a fluid reservoir with a fluid ejection device, wherein the fluid ejection device has a substrate having at least one fluid ejector thereon, a mechanical intercoupling structure disposed on said substrate, and a firing chamber layer disposed on said substrate and defining side walls of a firing chamber;
• and
• substantially embedding said mechanical intercoupling structure into the firing chamber layer;
• and
• encapsulating the mechanical intercoupling structure with the substrate and the firing chamber layer.

A method of coupling a barrier layer to a substrate of a fluid ejection device comprising:

• forming a fluid ejector on a first area of said substrate;
• disposing the barrier layer over a second area that surrounds the first area, wherein the barrier layer surrounds said fluid ejector;
• coupling said barrier layer to said substrate in the second area with an anchor means;
• and
• encapsulating the anchor means with the substrate and the barrier layer.