a dilatation balloon is fabricated according to a process that forms cavities and indentations in the balloon and / or catheter sections . a length of tubing is axially elongated and radially expanded in a form to provide the requisite biaxial orientation and strength . then , an excimer laser or another type of laser or mechanical material removal tool is used to remove the polymeric material , virtually without thermal effects . cavities in the sleeve sections of the balloon are defined and if desired , indentations in the cone sections are defined . material removal , particularly near the balloon sleeves enables a thinner , more flexible bonding area between the catheter shaft and the balloon . further , the indentations along the cone sections enables tighter wrapping of the balloon for a reduced delivery profile . rigidity near the sleeves is reduced for better maneuverability of the catheter in tortuous passageways .