Abstract: A flexure mounted slider and its method of fabrication is described, wherein the slider is affixed to a pair of highly compliant, transverse (to the longitudinal axis of a load beam) crossbars whose common axis passes directly above the center of percussion of the slider. The location of the center of percussion of the slider relative to the flexure eliminates translational motion of the slider during HDI events, but not twisting motion in a pitch direction during normal operation, and thereby minimizes the transfer of kinetic energy between the slider and the flexure during HDI events with a hard disk. The high compliance of the flexure crossbars to twists in a pitch direction, as well as the compliance of the outriggers to bending, allows the slider to pass over irregularities in the disk during normal operations.
Type:
Grant
Filed:
February 10, 2006
Date of Patent:
October 7, 2008
Assignee:
SAE Magnetics (HK) Ltd.
Inventors:
Li-Yan Zhu, Chao-Hui Yang, Mannuel Hernandez, Yen Fu, Ellis Cha
Abstract: A slider mounted CPP GMR or TMR read head sensor is protected from electrostatic discharge (ESD) damage and from noise and cross-talk from an adjacent write head by means of a balanced resistive/capacitative shunt. The shunt includes highly resistive interconnections between upper and lower shields of the read head and a grounded slider substrate and a low resistance interconnection between the lower pole piece of the write head and the substrate. The capacitances between the pole piece and the upper shield, the upper shield and the lower shield and the lower shield and the substrate are made equal by either forming the shields and pole piece with equal surface areas and separating them with dielectrics of equal thicknesses, or by keeping the ratio of area to insulator thicknesses equal.
Abstract: A head stack assembly of a disk drive unit includes a head arm assembly (HAA) having a head gimbal assembly, a drive arm to be connected with the head gimbal assembly; wherein the drive arm comprises a securing portion, a connection portion and a spacer connecting the securing portion with the connection portion. At least one undercut is formed on the spacer of the drive arm to strengthen the drive arm.
Type:
Application
Filed:
November 30, 2007
Publication date:
March 20, 2008
Applicant:
SAE MAGNETICS (HK) LTD.
Inventors:
Takehiro Kamigama, Yiu Sing Ho, Canhua Chen
Abstract: A head stack assembly of a disk drive unit including a head arm assembly (HAA) having a head gimbal assembly, a drive arm to be connected with the head gimbal assembly; wherein the drive arm comprises a securing portion, a connection portion and a spacer connecting the securing portion with the connection portion. In the present invention, at least one undercut is formed on the spacer of the drive arm to strengthen the drive arm. The invention also discloses a method of manufacturing such a head stack assembly.
Type:
Grant
Filed:
April 27, 2004
Date of Patent:
January 29, 2008
Assignee:
SAE Magnetics (HK)
Inventors:
Takehiro Kamigama, Yiu Sing Ho, Canhua Chen
Abstract: A magnetic reading head comprising: a bottom shield; a top shield; an AMR device with MR and SAL separated by a thin insulating layer; a first insulting gap layer between said bottom shield and said AMR; a second insulating gap layer between said AMR and said top shield; a conductive layer contact at one end region of said MR and SAL. Furthermore, magnetic reading heads with GMR device free of electric-pop noise also are disclosed.
Type:
Grant
Filed:
December 12, 2002
Date of Patent:
August 14, 2007
Assignee:
SAE Magnetics (HK) Ltd.
Inventors:
Yong Shen, Kwok Kam Leung, Hiroshi Kiyono, Tetsuo Miyazaki
Abstract: A device is provided by which the stiffness coefficient of a flexure, in either a pitch or roll direction, can be measured while a slider is mounted thereon and while the flexure and slider are in a loaded condition as might be obtained during normal operational conditions of a HGA in a HDA. There are two methods of making the measurement, a static method in which the slider is loaded by an external weight called a pendulum and the angular displacement of the slider is measured, and a dynamical method in which the pendulum is caused to oscillate while in contact with the slider and its natural and loaded frequencies of oscillation are measured.
Type:
Grant
Filed:
September 15, 2006
Date of Patent:
July 31, 2007
Assignee:
SAE Magnetics (HK) Ltd.
Inventors:
Li-Yan Zhu, Gautham Gowda, Chao-Hui Yang
Abstract: The invention relates to a magnetic recording head comprising: a bottom shield; a top shield; and AMR device with MR and SAL separated by a thin insulating layer; a first insulting gap layer between said bottom shield and said AMR; a second insulating gap layer between said AMR and said top shield; a conductive layer contact at one end region of said MR and SAL. Furthermore, magnetic recording heads with GMR device free of electric-pop noise also are disclosed.
Type:
Grant
Filed:
March 3, 2004
Date of Patent:
January 2, 2007
Assignee:
Sae Magnetics (HK) Ltd.
Inventors:
Yong Shen, Kwok Kam Leung, Hiroshi Kiyono, Tetsuo Miyazaki
Abstract: The invention relates to a magnetoresistive device comprising: a bottom shield; a top shield; an AMR/GMR device; a first insulating gap layer between said bottom shield and said AMR/GMR; a second insulating gap layer between said AMR/GMR and said top shield; and conductive layer contacting electrically both said AMR.GMR device to siaid bottom shield. Furthermore, similar active devices free of electric-pop noise also be disclosed.
Type:
Grant
Filed:
March 9, 1999
Date of Patent:
June 24, 2003
Assignee:
SAE Magnetics (HK) Ltd.
Inventors:
Yong Shen, Kwok Kam Leung, Hiroshi Kiyono, Tetsuo Miyazaki
Abstract: The invention relates to a magnetoresistive device comprising: a bottom shield; a top shield; an AMR/GMR device; a first insulating gap layer between said bottom shield and said AMR/GMR; a second insulating gap layer between said AMR/GMR and said top shield; and conductive layer contacting electrically both said AMR/GMR device to said bottom shield. Furthermore, similar active devices free of electric-pop noise also be disclosed.
Type:
Application
Filed:
December 12, 2002
Publication date:
June 5, 2003
Applicant:
Sae Magnetics (HK) Ltd.
Inventors:
Yong Shen, Kwok Kam Leung, Hiroshi Kiyono, Tetsuo Miyazaki