Patent ID: 9704943
Date: 2017-07-11
CPC Classifications: H01L

Claim:
1. An inductor structure comprising: a substrate having a plurality of bond pads; a protection layer located on the substrate and the bond pads and comprising a plurality of protection layer openings, wherein the bond pads are respectively located below the protection layer openings; a patterned conductive layer located on the bond pads and a surface of the protection layer adjacent to the protection layer openings; a first copper bump located on the patterned conductive layer; a second copper bump located on the patterned conductive layer; a diffusion barrier layer located on the first copper bump, wherein the first copper bump is between the diffusion barrier layer and the patterned conductive layer; an oxidation barrier layer located on the diffusion barrier layer, wherein there is no diffusion barrier layer and oxidation barrier layer on the second copper bump; and a metal division layer located on a top surface of the oxidation barrier layer, a side surface of the first copper bump, a side surface of the diffusion barrier layer, a side surface of the oxidation barrier layer, a side surface of the second copper bump, and a top surface of the second copper bump, such that the metal division layer covers the top surface of the oxidation barrier layer and surrounds the side surface of the first copper bump, the side surface of the diffusion barrier layer, and the side surface of the oxidation barrier layer, and the metal division layer is in contact with the side surface and the top surface of the second copper bump and completely covers the side surface and the top surface of the second copper bump, wherein the side surface of the first copper bump, the side surface of the diffusion barrier layer, and the side surface of the oxidation barrier layer extend in a vertical direction, and are directly connected in sequence, and are between the top surface of the oxidation barrier layer and the protection layer, and wherein the side surface of the second copper bump is between the top surface of the second copper bump and the protection laver.