Effect of slider conductive adhesive on EMI radiation of hard disk drives

Author

Jang, Eunkyu ; Choi, Ho-Joong ; Ku, Young-Min

Author_Institution

HDD R&D, Samsung Inf. Syst. America, San Jose, CA

fYear

2008

fDate

18-22 Aug. 2008

Firstpage

1

Lastpage

3

Abstract

EMI radiations from hard disk drives are measured outside a computer in a 3 m anechoic chamber. Hard disk drives with two different adhesive materials between the suspension and head slider are compared in EMI radiation level. The average EMI radiation of one type is 52.87 dBmuV/m while that of the other is 46.34 dBmuV/m. The main causes for EMI radiation difference of the two types of drives are investigated in this study. They have different DC resistance, breakdown voltage, and capacitance between the suspension and head slider when used in head gimbal assembly. It was found that the capacitance between slider and suspension is a critical factor for EMI radiation of hard disk drives.

Keywords

anechoic chambers (electromagnetic); disc drives; electromagnetic interference; hard discs; magnetic recording; DC resistance; EMI radiation; anechoic chamber; breakdown voltage; capacitance; hard disk drives; head gimbal assembly; head slider; slider conductive adhesive; Assembly; Coils; Conductive adhesives; Electromagnetic interference; Frequency; Hard disks; Integrated circuit interconnections; Magnetic heads; Magnetic levitation; Preamplifiers; EMI radiation; common-mode; hard disk drive; magnetic recording;

fLanguage

English

Publisher

ieee

Conference_Titel

Electromagnetic Compatibility, 2008. EMC 2008. IEEE International Symposium on

Conference_Location

Detroit, MI

Print_ISBN

978-1-4244-1699-8

Electronic_ISBN

978-1-4244-1698-1

Type

conf

DOI

10.1109/ISEMC.2008.4652032

Filename

4652032