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 Various Types of Static Eliminators


There are many types of static eliminators in terms of principle and structure, and they have advantages and disadvantages, respectively.

If wrong types of ionizer is selected unfortunately, you may suffer from the following issues:
・You can’t feel the effect of static elimination.
・Contrary to aim, the defect rate increases after introducing the ionizer.
・The ionizer itself breaks easily.
・Troublesome or impracticable maintenance.
・Hazardous for semiconductor.
・Risk of fire or electrical shock.

To avoid the disastrous situations described above, we would like to show a table summarizing the features of each ionizer type from technical point of views.
 We hope it will be provided to you as useful reference.


HOME > Differences in Various S/I Systems [DC, AC, Pulse DC, Pulse AC, High frequency, Plasma and Plasma DC Pulse systems]


Comparison table of Various Static Eliminators
   No.1  No.2 No.3 No.4 No.5 No.6 No.7 No.8 No.9 No.10 No.11 No.12 No.13
   Ion engine
type
(TRINC
method)
DC type
(air-blow type)
 
 DC type
(no-blow type)
AC type Phased Array
type
(TRINC
method)
High
frequency
(TRINC
method)
Pulse DC
type
Pulse AC
type
Plasma DC
type
Plasma DC
pulse
type
Soft X-ray
type
Ultraviolet
type
Radiation
type
Ion
Balance

About ±3V

About ±3V

About ±3V

About ±13V

About ±100V
(at center)

About ±15V
××
More than
±500V
(due to pulsation)
××
More than
±500V
(due to pulsation)

About ±20V
××
±600V
(at 5Hz)






effective
range
(with no air blow)

700mm
×
50mm

500mm
×
50mm

6,000×
3,000mm
Expandable
unlimitedly
××
0mm
×
50mm
×
50mm
×
can not use
without air blow

100mm


×
short at
proximate range
××
Very
short
No-blow
ionizing

Possible
××
Impossible

Possible

Almost
impossible

Possible
×
Impossible

Almost
Impossible

Almost
Impossible
×
Impossible

Possible at
short range

Possible

Possible

Possible
Ozon
Genaration

Little

Little

Little

Slightly much

Little
××
Much

Slightly much

Slightly much
××
Much
××
Much

No generation
××
Much

No generation
Static
induction
safety
(in proximity)

Safe

Safe

Safe
××
Very
dangerous

Safe
(at center)

Slightly dangerous

Safe

Safe

Safe

Safe

Safe

Safe

Safe
Labor
Safety

Safe

Safe

Safe

Safe

Safe

Safe

Safe

Safe

Safe

Safe
×
Possible X-ray exposure.
Shielding is required.
×
Possible ultraviolet radiation exposure.
Shielding is required.
××
Possible X-ray exposure.
Shielding is required.
 Reliability1
(Use of
high voltage)
 
Hgh
±5kV
 
Hgh
±5kV
 
Hgh
±5kV
 ××
Prone to faliure
±20kV
p-p
 
Hgh
±5kV
 
Hgh
±8kV
p-p
 
Average
7kV
 ×
Prone to faliure
±14kV
(Internal)
±7kV
(External)
 
Slightly
High
±5.4kV
p-p
 ××
Unstable due to temperature fluctuation
±11kV
p-p
 ×
Low
15kV

Slightly High


Slightly High

 Reliability2
(leak-free structure)

High

×
Prone to failure
×
Prone to failure
×
Prone to failure

High
×
Prone to failure
×
Prone to failure
×
Prone to failure
×
Prone to failure
×
Prone to failure
×
Slightly high

Slightly high

Slightly high
 Cost for replacement of Ion generation head
Low

Slightly high

Slightly high
×
High

Low
×
High
×
High
×
High
××
Very
High
××
Very
High
×
High
Short X ray tube life
(approx.1000h)
Authorization needed to dispose Xray tube
(depending on toxicity of beryllium)
×
High
Short ultraviolet ray tube life
(approx.1000h)
Authorization needed to dispose ultraviolet ray tube
(depending on toxicity of beryllium)
××
Very High
Authorization needed to dispose apparatus
Air consumption power cost
(in Japan)

No need fo air blow
××
$1,200-$3,000 a year for air blower
30W/h app. $60 a year for fan blower

No need of air blow
××
$1,200-3,000 a year

No need of air blow
×
$1,500 a year
××
$1,200-3,000 a year for air blower
××
$1,200-3,000 a year for air blower

Fan only

No need of air blow
(Principle)

No need of air blow
(Principle)

No need of air blow
(Principle)

No need of air blow
(Principle)
The following are technical explanations of merits and demerits of various ionizers.
If you have any questions, please feel free to contact us for more information.

No.1 Ion engine type
1. Excellent Ion balance within ±3V.
2. It is safe for semiconductors because there is no pulsation of ion balance.
3. Good ion balance can be achieved beyond 50mm from the electrode.
4. No blow ionizing makes a wide ionizing possible as far as 700mm.
5. No blow ionizing promises no dust-related defect, as it does not use air blow to cause an electric leakage or raise dust.
6. Due to the structure of the discharge electrode, leakage is less likely to occur and maintenance is less frequent.
Ion engine type


No.2 DC type
1. Excellent Ion balance within ±3V.
2. It is safe for semiconductors because there is no pulsation of ion balance.
3. No blow ionizing is not possible, because an ionizing area is only within 50mm from the electrode.
4. The use of fan or air blow causes an electric leakage, and raises dust making defect rate worse.
DC type


No.3 DC type (no bow type) 
1. Excellent Ion balance within ±3V.
2. It is safe for semiconductors because there is no pulsation of ion balance.
3. Good ion balance can be achieved beyond 50mm from the electrode.
4. No blow ionizing makes a wide ionizing possible as far as 500mm.
5. No blow ionizing promises no dust-related defect, as it does not use air blow to cause an electric leakage or raise dust.
6. Due to the structure of the discharge electrode, leakage is less likely to occur and maintenance is less frequent.
DC type(no blow type)


No.4 AC type
1. The attained ion balance is medium with around ±13V.
2. The ion balance pulsates at 50/60Hz, giving about ±7V even at 300mm away.
3. A pulsation of ion balance and electric field from electrode can destroy semiconductors if they approach within a range of 100mm.
4. No blow ionizing is not possible, because the effective ionizing area is as short as about 50mm.
5. The use of fan or air blow causes an electric leakage, and raises dust making defect rate worse.
AC type


No.5 Phased Array type (TRINC method)
1. Phased Array type is a new technology TRINC has invented.
2. It is possible to make the whole room free from static electricity by no blow ionizing.
3. A new antistatic method to be replaced from humidification.
4. A new antistatic method to be replaced from wrist strap, conductive shoes, and conductive floor.
5. Ultra-wide-area ionizing is possible. Effective area by one pair unit covers 18m2( 3x6m)./td>
6. Effective area can be expandable by connecting using link cable.
7. There is no pulsation of ion balance. Ion balance in the middle area is around ±100V.
8. No blow ionizing promises no dust-related defect, as it does not use air blow to cause an electric leakage or raise dust.
9. Due to the structure of the discharge electrode, leakage is less likely to occur and maintenance is less frequent.
Phased Array type


No.6 High frequency type
1. Good ion balance can be achieved.
2. Easy to downsize.
3. No blow ionizing is not possible, as ions are emitted with a help of compressed air or fan.
4. Ozone generated in a large amount may cause deterioration of the rubber material.
High frequency type


No.7 Pulse DC type
1. The attained ion balance is so poor as to go up to even over ±500V.
2. The ion balance pulsates at a pulse frequency, even up to ±500V at 300mm away (at no air blow, 1-40Hz)
3. A pulsation of ion balance and electric field from electrode may destroy semiconductors if they approach within a range of 300mm.
4. No blow ionizing is not possible, because the effective ionizing area is as short as about 50mm.
5. The device cannot be operated without air blow.
Pulse DC type


No.8 Pulse AC type
1. The attained ion balance is so poor as to go up to even over ±500V.
2. The ion balance pulsates at a pulse frequency, even up to ±500V at 300mm away (at no air blow, 1-40Hz)
3. A pulsation of ion balance and electric field from electrode can destroy semiconductors when they approach within a range of 300mm.
4. No blow ionizing is not possible, because the effective ionizing area is as short as about 50mm.
5. The use of fan or air blow causes an electric leakage, and raises dust making defect rate worse.
Pulse AC type


No.9 Plasma type
1. The device uses a plate-shaped electrode instead of normal electrode type.
2. Simple cleaning of the plate-shaped electrode makes a maintenance relatively easier.
3. The plate-shaped electrode has a short service life.
4. The plate-shaped electrode costs very high (20 times the cost of conventional electrode).
5. Need an assist of air blow.
6. The emittance of ions is unstable depending on environmental humidity.
7. Ozone generation is so intense there is a possibility of the workers' health problem.
8. The generated Ozone may rust metal parts nearby.
9. The ozone generated may deteriorate rubber parts such as electric cords and sealing materials like the oil seal and packings, to make them torn to shreds.
Plasma type


No.10 Plasma DC Pulse type
1. The device uses a plate-shaped electrode instead of normal electrode type.
2. Simple cleaning of the plate-shaped electrode makes a maintenance relatively easier.
3. The plate-shaped electrode has a short service life.
4. The plate-shaped electrode costs very high (20 times the cost of conventional electrode).
5. Ion balance is so poor that it may cause a hazardous situation (±600V at 5Hz)
6. Effective area of static elimination is so poor that it reach as short as 50 to 100mm.
7. The device may stop emitting ions or become unsteady depending on humidity changes.
8. Ozone generation is so intense that workers may upset. There is a possibility of their throat and lung being ruined.
9. The ozone generated may rust surrounding metal parts.
10. The ozone generated may deteriorate sealing materials, like the oil seal, and rubber parts, like the packing and electric cord, to make them torn to shreds.
Plasma DC Pulse type









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