Patent ID: 6958884

Claim:
A disk drive comprising: a) a head disk assembly (HDA) comprising a base having a top base surface and a bottom base surface; and a top cover secured to the top base surface; b) a printed circuit board assembly (PCBA) in communication with the HDA and comprising a first PCBA surface and a second PCBA surface wherein the first PCBA surface faces the bottom base surface; c) a bottom cover fastened to and substantially covering the bottom base surface; and d) an acoustic damping shield assembly placed between the bottom cover and the second PCBA surface, wherein the acoustic damping shield assembly comprises: first and second acoustic absorption layers having major surfaces; an acoustic barrier layer placed in between the major surfaces wherein the acoustic barrier layer is of a denser composition than each of the first and second acoustic absorption layers; and means for fixing the major surfaces and the acoustic barrier layer in a stacked relationship.