Patent ID: 7576414

Claim:
A semiconductor device, comprising: a substrate having a plurality of active devices formed thereon; a contact pad formed on the substrate; a solder bump formed on the contact pad of the substrate; an electrostatic discharge (ESD) bump electrode having a height H formed on the contact pad of the substrate; and a chip carrier substrate having a contact pad connected to the solder bump, the chip carrier substrate further including a ground plate, wherein the ESD bump electrode is separated from the ground plate by a distance D which is exposed to atmosphere and selected as a ratio of discharging threshold voltage for the active devices to discharging voltage of the atmosphere; wherein the ESD bump electrode, atmosphere, and ground plate respectively constitute a metal-insulator-metal capacitor having an electric field determined by the distance D which is less than electrostatic energy induced on the contact pad for discharging the electrostatic energy to protect the active devices.