These days, the needs of customer for processing the thin substrate
by using the PCB prototyping machine increases.
It is suitable to use vacuum table when processing on the thin
Two models of the vacuum tables
MITS handles two kinds of vacuum tables. Please choose one in
|Precision model VTP-CRM
Precision vacuum table made of the porous ceramics. Compliant
with the 50 µm thickness substrate board.
|Popular model VT-ABS
Popular vacuum table made of the porous plastic resin. Compliant
with the substrate board thicker than 200µm
|Working area W x D (mm)
||150 x 120
||300 x 170 / 229 x 295
|The thinnest substrate thickness (µm)
|Material of the porous surface
/ Eleven Lab, Auto Lab
The principle of
the vacuum table and its advantage
The fundamental principle is shown above.
The advantage is to aspirate the substrate very firmly, instead
of fixing them by
The porous materials
There are two types of materials; one is made of ceramics, the
other is made of
The ceramic material can be polished in order to improve the surface
but you cannot polish the plastic material.
Material and the surface flatness
The crucial factor in choosing the vacuum table is the thickness
of the substrate board.
In case of processing the thin substrate board, you need to choose
table whose surface flatness is sufficient. If the surface flatness
is bad, it causes
uneven width of the track or penetration of the tools into the
In case that the end mill penetrates
the substrate, the vacuum table
will not be able to function
When the surface of the porous table gets damaged, the aspiration
performance and the flatness become deteriorate. Therefore, in
processing the substrate, we recommend that you should avoid drilling
and routing and that you should perform the milling not to penetrate
50µm(2mil) line and space, the
state of the art!
Stepping method and non-contacting pressure foot lead to
the fine processing technology
MITS PCB prototyping machines are suitable not only for typical
PCB prototyping but also for fine processing of various types
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