Threaded hole processing method for PCB (printed circuit board)

• Main Authors: LIU KEGAN, ZHANG JUNJIE, PENG WEIHONG, ZHANG GUOCHENG
• Format: Patent
• Language: English
• Published: 27.01.2016
• Subjects: CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR; ELECTRICITY; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS; PRINTED CIRCUITS

The invention provides a threaded hole processing method for a PCB (printed circuit board), which comprises the steps of hole routing and thread tapping, wherein a ball type routing machine is adopted to carry out hole routing at the position where a heat dissipation copper block is inlaid in a PCB with a copper sheet, and a thread tap with a chip removing slot is adopted to carry out thread tapping on a through hole of the PCB so as to acquire a threaded hole used for fixing the heat dissipation copper block. The threaded hole processing method provided by the invention for the PCB can process a threaded hole in an epoxy resin PCB with the thickness reaching up to 5mm, the processed threaded hole of the PCB is high in precision, and the processing qualified rate of the PCB is ensured. The threaded hole can be processed in the PCB, so that a screw thread can be processed at the periphery of the heat dissipation copper block correspondingly, and the heat dissipation copper block is enabled to be locked on the PCB through the screw thread, thereby avoiding a problem that overall heat dissipation of the PCB is affected because of untight, loosened or even falling-off connection between the heat dissipation copper block and the PCB.