SEMICONDUCTOR DEVICE HAVING PROTECTION FUNTION OF ELECTROSTATIC DISCHARGE

摘要

A semiconductor device having a protection function for ESD is provided to protect an inner circuit of a semiconductor device from an overvoltage caused by static electricity when an arc discharge caused by static electricity is generated in the periphery of an NC(no-connection) ball by forming an NC pad having an ESD protection circuit and by connecting the NC ball to the NC pad. An NC pad(36) is formed on a package. The NC pad is connected to at least one NC ball of a semiconductor device. An ESD protection circuit is formed on the NC pad, composed of a first diode(40) connected between the NC pad and a power supply(VDD) and a second diode(42) connected between the NC pad and a ground potential(VSS). The NC ball can be connected to a PCB.