Patent ID: 9361917
Filing Date: 2016-06-07
CPC Classification: B21D,G11B,H01L,Y10T

Claim Text:
1. A method of fabricating a baseplate for a piezoelectric actuator for use in a disk drive, the steps of the method comprising: providing a plate with a predetermined plate thickness and having first and second major surface and edges; forming an aperture of a predefined perimeter in the baseplate, leaving a spanning portion extending across the aperture from a first section on the aperture perimeter to a second different section along the aperture perimeter; striking in a first direction, substantially normal to the first major surface of the plate, with a cutting punch to shear the plate at the first and second section of the aperture perimeter by a shear distance less than the plate thickness; striking the second major surface at the first and second sections of the aperture perimeters with a push back punch in a second direction substantially normal to the second major surface, reducing the shear distance by less than the plate thickness; and leaving the sheared spanning portion in place, whereby the sheared spanning portion prevents interlocking of multiple base plates packaged together, and adds structural integrity during shipping.