The manufacture of damascene structures having improved performance, particularly, but not by way of limitation, dual damascene structures is provided. The novel packet buffer is organized as a plurality of FIFO queues where each FIFO queue is associated with a particular input or output line. A heated or chilled fluid is conducted through a supply lumen of the catheter and into the bladder. The barrier may include multiple rings attached to the insert. This multichip package or system-in package is low in noise and high in operational reliability.