| abstract |
The present invention discloses a method for manufacturing a wafer level chip scale package device with one or more pre-solder layers, and a wafer level chip scale package device made thereby. The device includes: a chip including at least one bonding pad; a UBM layer disposed on the bonding pad; at least one pre-solder layer disposed on the UBM layer; and a bump melted and combined with the pre-solder layer. The device may include two pre-solder layers. |