Surface Modification of Magnetic Disks to Avoid Stiction
Original Publication Date: 1987-Dec-01
Included in the Prior Art Database: 2005-Feb-02
The described process eliminates stiction caused by coating defects known as windrows. Stiction is the adhesion occurring between the magnetic head and the lubricated particulate disk surface. This adhesion must be low to protect the file from damage upon start-up which is followed by a period of inactivity. Stiction is due, for example, to windrows 1 which are caused by the alignment of magnetic particles in rows. The windrows form a wavy surface (shown on the left in Fig. 2) with spaces between the rows being filled with lubricant. Such a structure enables lubricant to migrate to the head disk interface, leading to stiction.