An apparatus and related methods for ultrasound-assisted surgical removal of a tumor or other biological object from a patient, the tumor requiring complete removal such that no portion thereof remains inside the patient, is described. During operation, the system receives an instruction to be executed, wherein the instruction identifies at least one operand to be accessed from the register file. In a region of the second wiring layer 16 disposed at least in the vicinity of the via base hole 12a, a stress relieving portion 17 is formed which relieves bending stress, tensile stress, compressive stress, and shear stress that may arise when the electrical insulating base material 12 is curved. A blower is positioned to direct air to the vent holes.