A device and method for removing tissue, and if required, other undesired materials from an intervertebral disc or vertebral body. The technology is applied through installation of the apparatus into treatment wells. An insulating layer is deposited over the ridge and at least a portion of the sacrificial layer is removed. The leadframe rails may be treated by forming apertures in the rails, by increasing or decreasing the roughness of the leadframe rails, or by coating the leadframe rails with an adhesion promoting or reducing material.