Patent ID: 6349019
Filing Date: 2002-02-19
Classification: G11B

Abstract:
A magnetic head device with constant head floating height including a head arm attached to a drive shaft of a hard disc drive device, a suspension means extending from said head arm, and a head slider fixed on the tip end of said suspension means having an air bearing surface extending along said head arm in the longitudinal direction thereof, wherein the distance from the fulcrum for rotating/driving said head arm to the center of a magnetic disc D (mm), the distance from the fulcrum of said head arm to the center of said head slider L (mm), and the radial width of the recording area of said magnetic disc W (mm), the distance from the rotating/driving fulcrum of said head arm to the center of the slider is so set to satisfy the relation:0&lE;(D-L)mm&lE;(0.6 Wâˆ’4.4)mm wherein, the radial width W of said magnetic disc is between 12.5 mm and 22.5 mm, the core piece is positioned so as to be maintained at a constant floating height over all area of the rotating disc when performing a reading/writing operation.