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Background of Collaboration and Customer Pain Points: Huilian Electronics, a leading enterprise in the PCB micro-cutting tool industry, specializes in the R&D and manufacturing of PCB end mills with diameters ranging from 0.1 mm to 0.5 mm. Its customers include global top-100 PCB manufacturers such as Foxconn and AT&S. With surging demand for high-precision products—including IC substrates and chip packaging substrates—the limitations of conventional coated micro-diameter tools have become increasingly evident: frequent tool breakage, rapid edge wear, poor coating adhesion, and non-uniform coating coverage on small-diameter sections—resulting in substandard machining accuracy for fine grooves, persistently high tool-breakage rates, and delays in fulfilling high-end precision orders. There is an urgent need to overcome technical bottlenecks in micro-diameter tool coating technologies. Customized Collaboration Solution: Targeting the core challenges of precision machining with micro-diameter tools, this solution employs nanocrystalline CVD diamond coating technology. Coating thickness is precisely controlled to maximize retention of cutting-edge sharpness; deposition process parameters are optimized to ensure uniform, full-coverage coating over the entire micro-diameter cutting edge, significantly enhancing coating chipping resistance and adhesion. Tailored specifically for IC substrate and high-precision PCB machining conditions, the coating features low friction and superior wear resistance. In addition, comprehensive services—including one-on-one technical support, rapid sample iteration, and full-chain quality control for batch coating—are provided to meet the stringent requirements of high-precision, minimal-stock-removal machining. Collaboration Outcomes and Benefits: Tool breakage rates for micro-diameter end mills decreased by 85%; tool service life increased 22-fold; machining accuracy for fine grooves and isolation slots fully meets the stringent tolerance requirements of IC substrates. The product successfully passed mass-production validation with multiple high-end customers, reinforcing Huilian Electronics’ global market leadership in PCB micro-diameter cutting tools. Revenue contribution from high-end cutting tools rose by 30%, successfully breaking the foreign technological monopoly on coated cutting tools.

Background of Collaboration and Customer Pain Points: As a domestic specialized, sophisticated, and innovative manufacturer of precision PCB cutting tools, Vietnam Yongxin Precision Tool Co., Ltd. primarily produces standard tungsten carbide PCB end mills. However, with the continuous surge in orders for high-end 5G communication boards, high-Tg thick boards, and aluminum-based boards, the shortcomings of conventional uncoated tungsten carbide end mills—rapid wear and short service life—have become increasingly pronounced. A single tool’s continuous machining time falls short of two hours, resulting in frequent tool changes, high production line downtime rates, and persistently high tool consumption costs. Moreover, machined boards exhibit excessive edge burrs and significant dimensional inaccuracies, failing to meet the stringent shipment standards required for high-end substrates—making an upgrade to advanced tool coating solutions imperative. Customized Collaboration Plan: Following in-depth technical alignment between both parties, a tailored solution was developed for Yongxin Precision’s mainstream PCB end mills with shank diameters of 1.0 mm, 1.5 mm, and 2.0 mm, utilizing microwave plasma-assisted chemical vapor deposition (CVD) diamond coating technology. Ultrafine-grained cemented carbide substrates were selected and paired with a proprietary titanium-chromium interlayer to significantly enhance coating adhesion and prevent coating delamination during high-speed machining. Precise control over coating thickness and grain density ensures an optimal balance between cutting edge sharpness and wear resistance. Throughout the entire process—from sample testing and small-batch trial production to full-scale mass manufacturing—the solution fully aligns with Yongxin’s tool production capacity and quality inspection standards. Comprehensive post-coating quality assurance and process optimization support are also provided. Collaboration Outcomes and Benefits: After the customized CVD diamond-coated end mills entered formal production, tool service life increased by over 25-fold, with stable continuous machining time exceeding 24 hours per tool. Tool change frequency decreased substantially, boosting overall production efficiency by 65%; the yield rate for high-end substrate processing improved from 88% to 99.5%. Overall tool usage costs declined by 52%, enabling Yongxin Precision to secure long-term, large-volume orders from multiple leading PCB manufacturers. The company has successfully penetrated the high-end PCB cutting tool supply chain, simultaneously enhancing its product competitiveness and market share.