|What is Chemical Etching?
Chemical etching is a method of producing PCBs by dissolving
the copper in chemicals. Board shops mainly use chemical
etching processes to produce PCBs.
||Bungard is expanding its business in over
60 countries around the world. Along with the chemical etching
system, Bungard carries a wide range of products, including
a through- hole plating system, a multilayer pressing machine,
||MITS Electronics now carries chemical etching systems
manufactured by Bungard, a German manufacturing company. We opened
a new showroom near our office for you to see the product line-ups.
Please come visit us.
Nowadays, CAD is widely used at educational institutions to provide
training in electronic circuit technology in the classroom. It
is preferable for students to apply what they learned to the making
a PCB, and then mount the components to test the circuit for themselves.
When the PCB is prototyped by a milling machine, however, due
to the time-consuming process of milling and limited prototyping
quantities, this method is used by only a few students in extracurricular
classes or club activities.
What is required of PCB prototyping machines used in educational
MITS Electronics now takes advantage of the features of the Bungard
system not only to effectively train students in the procedures
of prototyping PCBs using the etching system but also to hand
the manufactured PCBs over to the students so that they can mount
them with components and test the results. It is an ideal system
for providing a practical education in technology to students.
Furthermore, the prototyped PCB is solder-resisted, which reduces
the number of short circuits caused by soldering, even for beginners.
High-Power Heat Dissipation Board (Ceramic board, EAluminum
The heat dissipation board has ceramic or aluminum as its base,
and the top is copper- cladded. To mill the copper off, generally
the milling tool needs to penetrate the copper. The tip of the
tool, however, will contact the ceramic or aluminum base and become
damaged due to the rigidity of the base material. MITS Electronics
therefore recommends chemically-etched prototyping for the above
Thick Copper-Cladded Boards
The copper thickness on a PCB is normally 35 or 18 microns, however
on high-power boards, the thickness can be 100 microns.
To mill a PCB with thick copper, MITS Electronics implements the
Stepping Milling Method using its unique Absolute
Milling process. To avoid contact with the base material, up to
approximately 30 microns is milled, and the chemical etching machine
is used to process the remaining copper.
Thin Film Boards
For film boards with thicknesses of less than 100 microns, despite
any theoretical conditions, the milling tool will in reality penetrate
the board. We therefore recommend using the chemical etching system
to process thin-film boards.
Since thin inner-layer boards are required for multilayer boards,
we suggest using the chemical etching system to prototype these
Even for the small-lot prototyping, chemical etching (the raster
method) is capable of completing the prototypes in a short time
compared with processing by milling (the vector method).
|For very fine patterns
Min. Pattern Width: 25µm
Through Hole Plating
|High Cost Performance
Min. Pattern Width: 150µm
Through hole pins
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