Patent ID: 8692390

Claim:
A pyramid bump structure electrically coupling to a bond pad disposed on a carrier, wherein the pyramid bump structure comprises: a conductive block comprising a main body, an under bump metallurgy layer defining a first ring wall, and a connecting layer defining a second ring wall wherein the main body is arranged between the under bump metallurgy layer and the connecting layer and wherein the conductive block has a lateral surface and a top surface, wherein the conductive block is disposed on the bond pad of the carrier and wherein the under bump metallurgy layer of the conductive block electrically connects the main body with the bond pad; and an oblique pyramid insulating layer comprises a bottom portion adjacent to the carrier and a top portion positioned above the bottom portion, wherein an outer diameter of the oblique pyramid insulating layer is tapered from the bottom portion to the top portion and wherein the oblique pyramid insulating layer covers at least the first and second ring walls such that, due to the taper of the oblique pyramid insulating layer, the pyramid bump structure rapidly embeds into an anisotropic conductive paste applied to mounting pads and a substrate so as to increase a flow rate of the anisotropic conductive paste as the pyramid bump structure is brought into adjacency with the mounting pads and substrate.