There are 13 IDEMA Standards on Micro-contamination. However, almost all Standards have not been revised in more than 10 years. The Contamination Control subcommittee in Japan has reviewed all standards on Micro-contamination at the following points of view.

  • Reflect new technical information and technologies since last updates
  • Add template form on measurement condition and analysis result in order to understand the result easily by third party
  • Reduce ambiguity
  • Correct typographical errors

This time, the following 6 Standards have been revised as a proposal for revised edition. Contamination Control subcommittee will continue the work of revision for remaining standards, too.

This document defines the terms and definitions as they relate to the Types and Sources of Contaminants, Disk Drive Industry Default Reporting Units for Contamination, Contaminant Transport Mechanisms in Hard Disk Drives, Materials Used in Hard Disk Drives, and Effects of Contamination in Disk Drives.

This document provides a list and description of materials and components commonly used in Hard Disk Drives (HDD) and some of the potential contamination problems which may be caused by or affect these materials.

This document describes the effects of microcontamination that manufacturing materials, processes and the environment will have on the final disk drive.

This document describes the test method for determination of nonvolatile residue (NVR) on components of disk drives and process materials.

This document specifies procedures to extract particulate contaminants from surfaces of disk drive components into a liquid medium, and to count and size the suspended particles.

This document specifies test procedure to measure the tendency of cobalt and/or nickel to oxidize/corrode in the presence of DI-water and subsequently migrate up through the various layers to the media surface. This migration is measured as the surface extractable levels of these elements formed.