Abstract: A semiconductor structure is provided. The semiconductor structure includes a first dielectric layer, a first metal layer, a via, an air gap, an etching stop layer, a second dielectric layer, and a second metal layer. The first metal layer is embedded in the first dielectric layer. The first metal layer includes a first conductive line and a second conductive line. The via is disposed on the first conductive line. The air gap is located on the second conductive line. The sustaining layer covers the air gap. The etching stop layer is disposed on the sustaining layer. The second dielectric layer is disposed on the etching stop layer. The second metal layer is disposed on the second dielectric layer and connected to the via.

Abstract: A method for manufacturing a semiconductor structure includes: forming a patterned first layer which is made of a first electrically conductive material, and which includes first lines, second lines, and a connection portion disposed on a part of one of the first lines, the first lines having a height lower than a height of the second lines; forming a first via which is connected to an upper surface of the connection portion, the first via having a height above the connection portion; and forming a second via which is connected to an upper surface of one of the second lines, the second via having a height that is the same as the height of the first via above the connection portion.

Abstract: A semiconductor structure is provided. The semiconductor structure includes a substrate and a device region formed over the substrate. The semiconductor structure further includes an interconnect structure formed over the device region and a first passivation layer formed over the interconnect structure. The semiconductor structure also includes a metal pad formed over and extending into the first passivation layer and a second passivation layer formed over the first passivation layer. The second passivation layer includes a thermal conductive material, and the thermal conductivity of the thermal conductive material is higher than 4 W/mK.