Browse Prior Art Database

A Method for Protecting a Head Suspension Assembly from ESD Damage in Manufacturing Process

IP.com Disclosure Number: IPCOM000123709D
Original Publication Date: 1999-Mar-01
Included in the Prior Art Database: 2005-Apr-05
Document File: 1 page(s) / 36K

Publishing Venue

IBM

Related People

Shimizu, M: AUTHOR [+4]

Abstract

Disclosed is a method for protecting an HSA (Head Suspension Assembly) using MR/GMR heads from ESD damage in manufacturing process. The HSA is a key part of HDD (Hard Disk Drive). In the HSA manufacturing process, ESD often damages the MR/GMR element when handling the HSA after it is charged up by some reason. The discharge happens where there is the difference of voltage potential. It is important not to make the potential difference anywhere for avoiding the discharge.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 66% of the total text.

A Method for Protecting a Head Suspension Assembly from ESD Damage
in Manufacturing Process

   Disclosed is a method for protecting an HSA (Head
Suspension Assembly) using MR/GMR heads from ESD damage in
manufacturing process.  The HSA is a key part of HDD (Hard Disk
Drive).  In the HSA manufacturing process, ESD often damages the
MR/GMR element when handling the HSA after it is charged up by some
reason.  The discharge happens where there is the difference of
voltage potential.  It is important not to make the potential
difference anywhere for avoiding the discharge.

   HSA consists of a read/write heads, a slider, an actuator
arm, and a preamplifier with a flexible cable.  The slider holds the
head elements and flies on a disk with the actuator arm.

   The following shows a conventional grounding connection
scheme of the HSA itself.  In this case, it is easy to make the
potential difference between (A) and (B) by handling the HSA,
because there is no electrical connection there.
  < Conventional HSA >
    (A)     (B)     (C)                      (D)
    Head   Slider--Actuator_arm          Preamplifier
    |                                         |
    +-----------------------------------------+

   Using an additional temporary jumper (E) improves the
situation as the following.  It reduces the potential difference at
the (A) and (B) because there is the electrical...