Printed circuit board(PCB)is a bridge for carrying electronic components and connecting circuits in electronic system.Mechanical drilling with cemented carbide micro-drill is the main processing method of PCB micropores.In this paper,the precision micro-drill and its processing technology are summarized,and the development trend of precision micro-drill is towards new type,miniaturization,high precision and high performance.At the same time,the technical development trends of ultra-small diameter micro-drill,large aspect ratio micro-drill and coated micro-drill for high-end printed boards are summarized,and the development direction of ultra-small diameter,ultra-large aspect ratio and super-lubricating coating is pointed out.
维普
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