Constant charge and constant potential models for electrostatic discharge and the human body

1999 ◽  
Vol 35 (1) ◽  
pp. 259-272 ◽  
Author(s):  
W.D. Greason
Keyword(s):  
Human Body ◽  
Electrostatic Discharge ◽  
Potential Models ◽  
Constant Potential ◽  
Constant Charge

ELECTROSTATIC DISCHARGE EFFECT ON TMR RECORDING HEAD: A FLEX ON SUSPENSION CAPACITANCE APPROACH

2009 ◽  
Vol 23 (17) ◽  
pp. 3586-3590 ◽  
Author(s):  
NUTTACHAI JUTONG ◽  
APIRAT SIRITARATIWAT ◽  
DUANGPORN SOMPONGSE ◽  
PORNCHAI RAKPONGSIRI
Keyword(s):  
Human Body ◽  
Electrostatic Discharge ◽  
Hard Disk Drives ◽  
Electrical Characteristics ◽  
Disk Drives ◽  
Human Body Model ◽  
Recording Head ◽  
Body Model ◽  
Recording Heads ◽  
First Time

Electrostatic discharge (ESD) effects on GMR recording heads have been reported as the major cause of head failure. Since the information density in hard-disk drives has dramatically increased, the GMR head will be no longer in use. The tunneling magnetoresistive (TMR) read heads are initially introduced for a 100 Gbit/in2 density or more. Though the failure mechanism of ESD in GMR recording heads has not been explicitly understood in detail, a study to protect from this effect has to be done. As the TMR head has been commercially started, the ESD effect must be considered. This is the first time that the TMR equivalent circuit has been reported in order to evaluate the ESD effect. A standard human body model (HBM) is discharged across R+ and R- where the capacitances of flex on suspension (FOS) are varied. It is intriguingly found that the electrical characteristics of the TMR head during the discharge period depend on the discharge position. This may be explained in terms of the asymmetry impedance of TMR by using adapted Thevenin's theory. The effect of FOS components on TMR recording heads is also discussed.

Measurement and Protection of Human Body Electrostatic of Mobile User Terminal

2013 ◽  
Vol 753-755 ◽  
pp. 2170-2174
Author(s):  
Tian Hai Chang ◽  
Meng Yao Fu ◽  
Pei Pei Yin
Keyword(s):  
Human Body ◽  
Electrostatic Discharge ◽  
Measurement Data ◽  
Mobile User ◽  
Protective Measures ◽  
User Terminal ◽  
Environmental Relative Humidity ◽  
Main Factors ◽  
Parameters Measurement ◽  
Discharge Test

This paper, on the basis of the electrostatic discharge test of mobile user terminals and electrostatic parameters measurement of human body, got electrostatic potential of human body in different condition. The results show that the main factors effecting human body electrostatic are environmental relative humidity, humans dressing, human activities and so on. Then error between the experimental measurement data and the theoretical analysis result are analyzed. Finally proposed some protective measures according to the harm of human body electrostatic to mobile user terminal.

Semiconductor laser damage due to human-body-model electrostatic discharge

1993 ◽  
Vol 74 (3) ◽  
pp. 1510-1520 ◽  
Author(s):  
Y. Twu ◽  
L. S. Cheng ◽  
S. N. G. Chu ◽  
F. R. Nash ◽  
K. W. Wang ◽  
...  
Keyword(s):  
Semiconductor Laser ◽  
Human Body ◽  
Electrostatic Discharge ◽  
Laser Damage ◽  
Human Body Model ◽  
Body Model
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