| 摘要 |
<p>A Head Gimbal Assembly (HGA) loader using sub-ambient air pressure to move a magnetic head of the HGA over a test surface. Clamp (10) mounts HGA (12) adajcent to nozzle (24). Nozzle (24) draws in air (30) through orifice (50) creating a sub-ambient pressure region below suspension beam (18), causing ambient air to flow into the created sub-ambient void. Air flow (30) moves suspension beam (18) away from the surface of disk (22) unloading HGA (12). The sub-ambient pressure level and the separation between head (14) and disk (22) is varied by a computer controlled regulator valve (32). The loader can be used in a flying height tester calibrated by taking optical data while varying flying height by changing sub-ambient pressure. The sub-ambient pressure created by orifice (50) causes HGA (12) to bend about its natural pivot point or the bend radius of the suspension or load beam (18), which does not create additional slider angles during testing, nor introduce any mechanical sliding motion which could generate debris.</p> |
