Original Publication Date: 1987-Oct-01
Included in the Prior Art Database: 2005-Feb-02
This invention refers to use and attachment of a transducer on burnish test arms for determining hard disk quality prior to glide height testing on a manufacturing line. In Fig. 1, using a transducer 2, and bonding a TEFLON* dowel 3 to the active surface, the transducer is inserted in and held to the burnish arm 1. By inserting dowel 3 into the hole in the suspension mounting plate and arm, asperities can be detected when the head hits them. This is due to the vibration transmitted through the suspension. The information collected is then used to assist in eliminating process problems at glide height testing. Fig 2 shows the simulated trace that would be seen on an oscilloscope as the burnish head hits asperities. * Trademark of E. I. du Pont de Nemours & Co.