Patent ID: 6947252

Claim:
A hard disk drive, comprising: a base plate that has an external cavity; a spindle motor coupled to said base plate; a disk coupled to said spindle motor; an actuator arm mounted to said base plate; a voice coil motor coupled to said actuator arm; a suspension arm coupled to said actuator arm, said suspension arm having a gram load; a head coupled to said suspension arm and said disk; a printed circuit board assembly located in said external cavity a wave stringer attached to said base plate within said external cavity and located adjacent to said printed circuit board in a non-overlapping manner, said wave stringer having a plurality of non-through hole openings that separate a plurality of ribs configured and located relative to said base plate to optimize attenuation of energy propagating through said base plate; and, a cover that is attached to said base plate and encloses said disk, said actuator arm, said voice coil motor, said suspension arm and said head.