Patent ID: 7425468

Claim:
A method for making a flip chip on leadframe package, comprising the following steps of: (a) providing a leadframe having a plurality of inner leads; (b) providing a chip having an active surface; (c) forming a plurality of first bumps and at least one second bump on the active surface of the chip, wherein the material of the first bumps is the same as that of the second bump, and a height of the second bump is smaller than that of the first bumps; (d) dipping tops of the first bumps in a flux so that the first bumps are dipped with the flux, and the second bump is not dipped with the flux; (e) contacting the first bumps to corresponding inner leads; and (f) proceeding with a reflow step so that the first bumps are melted and connected to the corresponding inner leads, and the second bump is connected to the corresponding inner lead without being melted so as to maintain a gap between the active surface of the chip and the inner leads.