公开(公告)号：WO1997022121A1

公开(公告)日：1997-06-19

申请号：PCT/US1996019703

申请日：1996-12-11

Applicant: PHASE METRICS

Inventor： PHASE METRICS ,  BALSTER, Charles ,  WANEK, Donald ,  LOTH, Steven

IPC: G11B21/21

CPC classification number: G11B21/16 ,  G11B5/455 ,  G11B5/4806 ,  G11B5/4833 ,  G11B5/5534 ,  G11B21/21 ,  G11B21/24 ,  G11B33/10

Abstract: 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.

Abstract translation: 使用低于环境空气压力的头部云台装置（HGA）装载机将HGA的磁头移动到测试表面上。 夹具（10）将HGA（12）安装到喷嘴（24）上。 喷嘴（24）通过孔口（50）吸入空气（30），从而产生悬浮梁（18）下方的低于环境压力的区域，使环境空气流入所产生的次环境空隙。 空气流（30）将悬挂梁（18）移动离开卸载HGA（12）的盘（22）的表面。 通过计算机控制的调节阀（32）改变副环境压力水平以及头部（14）和盘（22）之间的分离。 装载机可用于飞行高度测试仪，通过拍摄光学数据校准，同时通过改变次环境压力来改变飞行高度。 由孔口（50）产生的次环境压力导致HGA（12）围绕其自然枢转点或悬架或负载梁（18）的弯曲半径弯曲，这在测试期间不产生额外的滑块角度，也不引入任何 可能产生碎片的机械滑动运动。