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Chemical Etching PCB Prototyping System!!

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, and accessories.

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.

What is required of PCB prototyping machines used in educational programs?

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.

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 board)

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 materials.

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.

Multilayer Boards

Since thin inner-layer boards are required for multilayer boards, we suggest using the chemical etching system to prototype these boards.

Small-Lot Prototyping

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
Solder Resist

1. Photoplotter 2. PCB Prototyping Machine 3. Brushing Machine 4. Through-hole Plating Line
.5. Dry Film Laminator 6. Vacuum Exposure Unit 7. Spray Developing Machine 8. Spray Etching Machine


High Cost Performance

Min. Pattern Width: 150µm
Through hole pins

1. Presensitized Board 2. PCB Prototyping Machine 3. Vacuum Exposure Unit 4. Spray Etching Machine
5. Mechanical PTH
MITS Electronics


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