| Research Title |
Effect of Magnetic Field and Electric Field Emission from Discharge Current in Gold Ball Bonding Process upon TMR Heads |
| Date of Distribution |
7 October 2011 |
| Conference |
| Title of the Conference |
The 4th International Data Storage Technology Conference |
| Organiser |
Thailand Board of Investment, National Science and Technology Development Agency, Hard Disk Drive Institute , and I/U CRC in HDD Component |
| Conference Place |
IMPACT Convention Center |
| Province/State |
Nonthaburi |
| Conference Date |
9 January 2012 |
| To |
10 January 2012 |
| Proceeding Paper |
| Volume |
2010 |
| Issue |
- |
| Page |
149-152 |
| Editors/edition/publisher |
|
| Abstract |
Tunnelling Magnetoresistive (TMR) heads in magnetic recording heads can be damaged by electric field and degraded by an external magnetic field. This work presents the effects of electric-magnetic field emission caused by a discharge current during free-air ball making a contact to an electrical pad of slider and suspension during a gold ball bonding process on TMR heads. A bonding current was acting as an Electromagnetic Interference (EMI) source being captured by a current probe. Discharge current was investigated by using CT-6. EMI effect was monitored using finite integral. The simulations show that the radiated magnetic field strength located at TMR heads is approximately 0.6 Oe. This level is inadequate to degrade the MR heads due to the exchange bias is over few hundreds Oe. The radiated electric field strength caused by the discharge current is 0.14 GV/m while the dielectric strength of MgO is approximately 0.95 GV/m; therefore, the radiated electric field is 14.74% of the breakdown of the oxide level while the radiated magnetic field is only 0.62% of the threshold level of MR heads at the ball bonding process. In conclusion, the radiated electric field plays a stronger role to TMR heads than the radiated magnetic field. |
| Author |
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| Peer Review Status |
ไม่มีผู้ประเมินอิสระ |
| Level of Conference |
นานาชาติ |
| Type of Proceeding |
Full paper |
| Type of Presentation |
Oral |
| Part of thesis |
true |
| Presentation awarding |
true |
| Award Title |
Best Paper Award |
| Type of award |
รางวัลด้านวิชาการ วิชาชีพ |
| Organiser |
DST-CON 2010 |
| Date of awarding |
9 มกราคม 2555 |
| Attach file |
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| Citation |
0
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Publication
Journal Publication
ไทย