ADVANCED ELECTROSTATIC REMOVER
No Overshoot
High Ion Density
"
"
"
Particle Free" Ozone Free"
No Air Flow"
ADVANCED ELECTROSTATIC REMOVER
O
3
Free!
Particle
Free!
No
Overshoot
The soft X-ray method does not
emit UV radiation.
Ozone is generated when the air is exposed to specific
types of UV rays (approx. 10eV). The blue light of a
corona discharge contains this type of UV ray. The
Photoionizer, in contrast, emits soft X-rays (6keV)
into the air to make an ionization. This ion
generation method does not generate any ozone.
The soft X-ray method is greatly
superior to the conventional
discharge method.
<Dust Particles>
In the corona discharge method,
microparticles in the air are attracted to the electrodes
and then diffuse back as dust particles.
<Electromagnetic Noise>
Corona discharge
accompanies the generation of electromagnetic noise.
As long as the discharge method is used, the above
problems are inevitable. In contrast, the soft X-ray method
used by the Photoionizer eliminates these problems.
Ions are generated over the
entire exposed area.
In the corona discharge method, ions are mainly
generated only near the electrodes. In the soft X-ray
method, however, ions are generated over the entire
volume exposed to these soft X-rays, yielding a drastic
improvement in the removal of electrostatic charges.
Ov
Ov
2
No ozone generation
No ozone generation
No dust particles and
electromagnetic noise
generation
No dust particles and
electromagnetic noise
generation
High ion density
High ion density
Why!
Why!
Why!
No overshoot
Good ion balance eliminates
overshoot.
If ion generation balance is poor, the positive
or the negative ions will continuously
increase in large quantities, resulting in
"overshoot" (generation of
static charges of opposite polarity). The
Photoionizer, however, simultaneously
generates the same amount of "positive" and
"negative" ions in an ideal balance that
prevents overshoot.
Maintenance free
Maintenance free
The soft X-ray method does not require any
maintenance, such as the "electrode
cleaning" often needed by the bar type
corona method.
After more than 8,000 hours of
operation, only the head will need
replacement.
Ion generation constantly occurs over the entire
volume exposed to soft X-rays.
Ions generated near the charged object serve to
effectively remove the electrostatic charge,
so there is no need for sending generated ions
toward the object by an air flow.
The soft X-ray exposure volume is
equal to the ion generation volume.
No overshoot
1
The Photoionizer is a completely new
"photoionization" for clean, easy, yet
The Photoionizer provides big advantages over the
The Photoionizer throughly ionizes
ions in turn work effectively to remove
The Photoionizer is certain to be the
removers, since it now eliminates all the
removers have in terms of object,
ADVANCED ELE CTROSTATIC REMOVER
No air flow
No air flow
Introducing a new
electrostatic charge
removal using
"PHOTOIONIZATION"!!
Introducing a new
electrostatic charge
removal using
"PHOTOIONIZATION"!!
Why!
Why!
Why!
Stable atoms/Molecules Ions
Charged objects Soft X-ray
TAPPF0124
type of electrostatic remover using
effective generation of ions.
corona discharge method which is generally used.
molecules near the charged object so these
electrostatic charges accumulated on the object.
next generation of electrostatic charge
problems conventional electrostatic
speed, environment and reliability.
IC/LCD/PDP process lines
The soft X-ray method does not cause diffusion of dust
particles and provides a good ion balance that allows
efficient removal of electrostatic charges without
overshoot. Since this method generates no ozone, the
electrostatic removal process is kept clean and safe.
On the IC, LCD and PDP process lines in a clean room,
electrostatic charge may cause serious problem
such as dust adhesion, dielectric breakdown and
corrosion from ozone on peripheral equipment.
Problem
Solution
Solutions
Packing of powdered products
Powder manufacturing process
4
The soft X-ray method generates a high ion density
which does not require an air flow for transfer.
Therefore, the electrostatic charges on powders can
be efficiently neutralized without disturbing the air flow
in the process line.
In the manufacturing and air-transfer processing of
powders, strong electrostatic charges are generated
due to collision (contact and separation) of powder
particles. This results in adhesion and accumulation of
powders in the transfer pipe.
Problem
Solution
The soft X-ray method does not require an air flow to
transfer the generated ions, so the electrostatic charges
can be removed without blowing away the
powder. Further, because a wide area is exposed to the
soft X-rays at the same time, the electrostatic charges
on the film case can also be removed.
Solution
During the packing process for powdered medicine or
food using film sheets, static electricity may cause
powder to adhere to the dispenser nozzle or to the
sealing surface of the sheet. This prevents the powder
from being supplied correctly, resulting in packing errors
in subsequent processes.
Problem
No Air
Flow
Plastic component molding process
A high density of ions generated by the soft X-ray
method can instantaneously eliminate such strong
electrostatic charges. This method is also effective
in removing electrostatic charges completely even from
products with complex shapes.
In the molding of plastic components, strong electro-
static charges occur when the component is separated
from the die assembly. These charges cause dust
and debris to adhere to the components.
Problem
Solution
A new era of safe and clean electrostatic removal has now begun.
The Photoionizer has solved problems such as "generation of ozone and dust particles" and
"overshoot due to poor ion balance" that often occur in the conventional method.
The Photoionizer can also remove accumulated static charges even on high-speed moving objects
and powders, which have been impossible up until now, by using the corona discharge method .
Here are some problem solutions delivered by the Photoionizer - the advanced electrostatic
remover.
High-speed moving objects
(films, printed matters, etc.)
In the soft X-ray method, ions generated near the film
surface serve to efficiently remove the electrostatic
charges. Even though the film moves at high speed,
the electrostatic charges can be reliably neutralized. In
addition, ions generated by soft X-rays penetrating
through the film, also neutralize the electro-static
charges on the reverse side of the film, so that the
electrostatic removal effect is greatly improved.
In film manufacturing and offset printing processes
which usually move at high speed, electrostatic charges
accumulated on the transfer cylinders may result in non-
uniform printing or cause electric shocks to the human
body.
3
High Ion
Density
No Air
Flow
PCB mounting, chip mounter
The soft X-ray method generates a high ion density
which effectively neutralizes the electrostatic charges.
Since air flow is not needed to transfer the generated
ions, there is no problem with having to subject
extremely thin and lightweight components, such as film
spacers to the air flow.
Electronic components are continually being made
smaller, thinner and lighter weight. Static electricity may
cause these components to attract and stick to each
other, or may lead to component delivery errors in the
feeder.
Problem
Solution
Particle
Free
!
No
Overshoot
Solution
Problem
O
3
Free
!
High
Speed
!
High Ion
Density
High Ion
Density
No Air
Flow
No Air
Flow
ADVANCED ELECTROSTATIC REMOVER
EASY SHIELD COVER IS REQUIRED
Shielding ef
fect (%)
Soft X-ray shielding effects
EASY SHIELD COVER IS REQUIRED
6
Soft X-rays (6keV) can be
shielded with a 2mm thick
vinyl chloride plate to
sufficiently safe levels*.
Soft X-rays (6keV) can be
shielded with a 2mm thick
vinyl chloride plate to
sufficiently safe levels*.
* Below natural radiation
levels
The Photoionizer requires soft X-ray
shielding, since the soft X-rays emitted
from the Photoionizer are weak
(6keV), a simple shield, such as
0.5mm thick steel plate, 1mm thick
glass and 20mm thick acrylic plate
will completely prevent any exposure.
Shield cover
Steel plate Aluminum plate Glass plate
Vinyl chloride plate Acrylic plate
Thickness (mm)
100
80
60
40
20
10
100
1
10
0.1
0.01
0.001
Ionization occurs near
the charged object.
plate or film
Object
Powder or dense solid
Object
Ions generated near the charged object
are easily attracted to it.
Other generated ions return to their
original stable state.
Ions are generated near each powder
particle because ion generation occurs
over the entire area exposed to the soft
X-rays. So there is no need for a forced
air flow.
e
e
|
|
"Photoionization"
mechanism
Stable atom or molecule
Soft X-ray
Ejected electron
Ion
Atom or
molecule of
positive polarity
as one electron
is ejected.
Ion
Ion
Ion
Stable atom
or molecule
Principle of
Photoionization
Principle of
Photoionization
5
If ion balance is poor, too many positive or too many negative ions are
continually present. This is what causes "overshoot".
Photoionization ensures
a good ion balance.
Stable atoms or molecules
Ions
Charged object
Soft X-rays
HAMAMATSU PHOTONICS K.K., Electron Tube Center
314-5, Shimokanzo, Toyooka-village, Iwata-gun, Shizuoka-ken, 438-0193 Japan, Telephone:(81)539/62-5248, Fax:(81)539/62-2205
U.S.A.: Hamamatsu Corporation: 360 Foothill Road, P.O.Box 6910, Bridgewater, N.J. 08807-0910, U.S.A., Telephone:(1)908-231-0960, Fax:(1)908-231-1218
Germany: Hamamatsu Photonics Deutschland GmbH: Arzbergerstr. 10, D-82211 Herrsching am Ammersee, Germany, Telephone:(49)8152-3750, Fax:(49)8152-2658
France: Hamamatsu Photonics France: S.A.R.L.: 8, Rue du Saule Trapu, Parc du Moulin de Massy, 91882 Massy Cedex, France, Telephone: 33-(1) 69 53 71 00, Fax: 33-(1) 69 53 71 10
United Kingdom: Hamamatsu Photonics UK Limited: Lough Point, 2 Gladbeck Way, Windmill Hill, Enfield, Middlesex EN2 7JA, United Kingdom, Telephone:44(20)8-367-3560, Fax:44(20)8-367-6384
North Europe: Hamamatsu Photonics Norden AB: Smidesvgen 12 SE-171-41 Solna, Sweden, Telephone:(46)8-509-031-00, Fax:(46)8-509-031-01
Italy: Hamamatsu Photonics Italia S.R.L.: Strada della Moia, 1/E 20020 Arese, (Milano), Italy Telephone: (39)02-935 81 733 Fax: (39)02-935 81 741
TAPP1023E02
JUL.1999 T
Printed in Japan.(1000)
(unit:mm)
CONTROLLER UNIT
Parameter
Ionization method Soft X-ray exposure
Ionization Source Soft X-ray tube
Soft X-ray tube
Tube voltage DC +9.5kV
Tube current 150
A
Input voltage/power consumption DC 24V
5%/20VA
Ionization source
Guaranteed life 1000 hours
Average life 8000 hours
Function
Ionization ON/OFF
Front panel switch on controller
Ion monitor
LED lamps on the head and controller are lit during ionization.
Interlock
Connection at the rear panel
External control
Connection at the rear panel
Indicator
Connection at the rear panel
SOURCE HEAD
Photoionizer L6941-01
142
96
7.5
150
108
40
7.5
INTERLOCK
HOURS
MONITOR
POWER
ION
REMOTE
ON
OFF
CONTROL
24V
INTERLOCK
REMOTE
INDICATOR
TO. 5A 250V
20cm
5
sec.
40
80
120
160
0
40
80
120
160
40cm
60cm
80cm
100cm
(cm)
120
1
sec.
10
sec.
Measurement conditions
Charging voltage: 1kV to 100V Measuring device: Charging plate
Temperature : 26
C (150
150mm, 20pF)
Humidity : 50% Air flow: None
Discharge Time
Dimensional Outlines
Specifications
TAPPA0039EA
16.5
28
38
80
65
100
OUTPUT
WINDOW
75
8
65.5
1/4-20UNC
2-M4
ION
MONITOR
CONTROL
TAPPA0040EA
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