Browse Prior Art Database

Integrated Suspension Assembly with Reduced Slider Distortion

IP.com Disclosure Number: IPCOM000118160D
Original Publication Date: 1996-Oct-01
Included in the Prior Art Database: 2005-May-09
Document File: 2 page(s) / 32K

Publishing Venue

IBM

Related People

Childers, W: AUTHOR [+2]

Abstract

The current invention describes a process to achieve: 1. low slider air bearing distortion (crown, camber, and twist) due to assembly and cleaning processes and temperature changes in the file and 2. minimal fly height variation in the file without creep.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 100% of the total text.

Integrated Suspension Assembly with Reduced Slider Distortion

              Ablestick XM  Ablestick XP  Dymax 301-8  Blackmax
              ============  ============  ===========  ========
Crown change
from slider to
hga (after
bonding),
mean, nm         0.94          1.30          2.31        30
1 sigma, nm      0.89          0.74          1.17         7

      The current invention describes a process to achieve:
  1.  low slider air bearing distortion (crown, camber, and
       twist) due to assembly and cleaning processes and
       temperature changes in the file and
  2.  minimal fly height variation in the file without creep.

      Low modulus materials such as Ablestick XM and XP (epoxies),
and Dymax 301-8-2 and Dymax 301-35-1 (urethane acrylate) are used to
bond the slider to the HGA and the copper traces are terminated by
several methods including solder reflow using lasers (1,2),
ultrasonic bonding using bent leads, solder ball bonding, and solder
wire bumping.  The low modulus materials provide the low crown
sensitivity to temperature and the termination methods with the rigid
copper trace structure fix the slider in position and prevent creep
and large elastic displacements.
  References
  (1) U.S. Patent # 4,996,623
  (2) U.S. Patent # 4,761,699