Techniques are provided for preventing program disturb of unselected memory cells during programming of a selected memory cell in a NAND string which includes a continuous charge-trapping layer, either in a two-dimensional or three-dimensional configuration. A first shaft is coupled to the inner joint member for articulated movement with the inner joint member relative to the outer joint member. In particular the cushion includes a deformable resilient member that when compressed creates a uniformly and gradually increasing force while evenly distributing the pressure on the forehead of the patient.