A trephine drill bit comprising a body and a tip connected to the body, wherein the tip includes a reduced area having a smaller diameter than the body, the reduced area ending in a stop to indicate when the trephine drill bit should no longer be introduced. In the present invention, first, an image capturing unit is enabled for capturing an image. During a treatment process when a treatment fluid is pumped into the fluid delivery tubular, the fluid delivery tubular progressively allows the treatment fluid to exit from the interior of the fluid delivery tubular to the exterior of the fluid delivery tubular from a first end of the interval to a second end of the interval to progressively treat the interval of the wellbore. A squeegee presses the paper to the wall as it is being unwound. The process of filling the vias and trenches involves use of a silicon nitride film as an etch stop and the filling of the vias with an anti-reflection coating. Related apparatus and methods are also disclosed.