abstract |
A bumping process, a bump structure, a packaging process and a package structure are described. The bump structure comprises a first solder portion, a second solder portion and a pseudo under bump metallurgy. The second solder portion is disposed on the first solder portion The pseudo under bump metallurgy is disposed between the first solder portion and the second solder portion. The present invention also describes the process of the bump structure to increase the height of bump structure. The bump structure also can be applied in the packaging structure and packaging process thereof to make the connection between chip and packaging substrate has high reliability. |