In order to solve the problem that the integrated circuit cannot work normally due to the high local current density of the low-voltage and high-current power supply network in the design of high density PCB board,combining the current density theory with the design example of the hole in PCB,a method is proposed to solve the current density in high speed printed circuit board by adjusting the via position.Combined with the example of ad-justing the via position to reduce the current density,the awareness of the influence of the via distribution on the in-tegrity of the power supply is established,and help the personnel to solve the PCB design problem of low voltage and high current.
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