A novel gypsum board having antifungal properties is disclosed. Oriented films made in accordance with the present invention exhibit improved processability as well as improved physical properties such as excellent optics and impact resistance. The potential plane element thus performs the functions of a solder mask to prevent solder from forming short circuits between adjacent pads, and may also act as a ground plane, power plane or shielding element. The laser radiation is applied through an optical fiber which may be held within a catheter-like device having a single lumen.