Abstract: An integrated circuit and manufacturing method therefore is provided having a semiconductor substrate with a semiconductor device and a device dielectric layer formed on the semiconductor substrate. A channel dielectric layer on the device dielectric layer has a channel opening, a barrier layer lining the channel opening, and a conductor core filling the channel opening. A barrier layer is deposited which contains an element capable of reacting during thermal treatment with both the conductor core and the channel dielectric layer to form a barrier to diffusion of the material of the conductor core to the channel dielectric layer. The barrier layer reacts with the conductor core and the channel dielectric layer to form a compound which provides a bond which blocks surface diffusion and permits conductor core to conductor core diffusion in dual inlaid integrated circuits.