Wafer Bumping
Wafer bumping technology can provide significant performance, form factor and cost advantages in a semiconductor package. Wafer bumping is an advanced manufacturing process whereby metal solder balls or bumps are formed on the semiconductor wafer prior to dicing. Wafer bumps provide an interconnection between the die and a substrate or printed circuit board in a device. Solder bump composition and dimension depends on a number of factors such as form factor, cost and the electrical, mechanical and thermal performance requirements of the semiconductor device.