The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 21, 2001
Filed:
Oct. 05, 1999
James M. Adley, Hutchinson, MN (US);
Questek Innovations, Inc., Waconia, MN (US);
Abstract
A disk drive system includes a base, a disk rotatably attached to the base, and an actuator assembly pivotally attached to the base. The actuator assembly moves the transducer to selected areas of the disk where information representative of data is to be written or read. The actuator assembly maintains the transducer in a transducing relationship with the disk. The actuator assembly includes an arm and a head gimbal assembly. The head gimbal assembly includes a suspension. The arm has a length from the point where it pivots to the end of the arm. The arm and suspension can be thought of as having a fixed length for a certain sized disk drive. The length of the arm is greater than 4.0 times the length of the suspension. The ratio of the length of the arm to the length of the suspension is in the range of 4.0 to 20.0. The arm is made of a material with a stiffness-to-mass ratio in the range of 6.0 to 20.0×10,m. The resulting actuator arm is long and stable and the suspension is short so that the signal processing preamplifier chip attached to the arm near the end carrying the transducer is 8 mm or less from the head transducer. The material of the arm conducts heat away from the chip by moving it from the preamplifier chip to the surface of the arm in the airstream between the disk and the arm. The suspension includes signal-carrying wires which electrically connect the transducer to the preamplifier chip which have a length in the range of 4 mm to 12 mm.