Only the copper in the cut section of the through hole is removed by etching! We can accommodate board thicknesses from 0.04 to 0.3 mm.
We would like to introduce our "Partial Etching Through-Hole Substrate." In printed circuit boards used as substrate for devices, after component mounting, through-holes may be diced and used as soldering electrodes. However, cutting the copper plating of the through-holes inevitably leads to burr formation. Our company enables the production of cut through-hole substrates without burrs by selectively etching away only the copper at the cut portions of the through-holes. [Applications] ■ Substrate boards for devices with through-hole electrodes, etc. *For more details, please refer to the PDF document or feel free to contact us.
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Sanwa Electronic Circuit manufactures printed circuit boards used in various aspects of daily life, including smartphones, car navigation systems, wireless devices, ETC and onboard equipment, and medical devices. Our company was founded in 1955 as Sanwa Electric Manufacturing Co., Ltd. After expanding production and sales through four group companies in the circuit board sector, we integrated these companies in 2004 and launched anew as Sanwa Electronic Circuit Co., Ltd. with a divisional structure. During this time, thanks to the guidance and support of our clients, we have developed and grown as a specialized company in printed circuit boards for over half a century, advancing alongside the evolution of printed circuit boards. We sincerely appreciate your continued support and patronage.