Abstract:
A semiconductor manufacturing method includes providing a carrier having a metallic layer, wherein the metallic layer comprises a plurality of base areas and a plurality of outer lateral areas; forming a first photoresist layer; forming a plurality of bearing portions; removing the first photoresist layer to reveal the bearing portions, each bearing portion comprises a bearing surface having a first area and a second area; forming a second photoresist layer for revealing the first areas of the bearing surfaces; forming a plurality of connection portions, wherein the first areas of the bearing surfaces are covered by the connection portions to make each connection portion connect with each bearing portion to form a snap bump; removing the outer lateral areas of the metallic layer to make the base areas form a plurality of under bump metallurgy layers.
Abstract:
A semiconductor manufacturing method includes providing a substrate having a metallic layer that includes a first metal layer and a second metal layer, the first metal layer comprises plural base areas and plural first outer lateral areas, the second metal layer comprises plural second base areas and plural second outer lateral areas; forming a first photoresist layer; forming plural bearing portions; removing the first photoresist layer; forming a second photoresist layer; forming plural connection portions, each connection portion comprises a first connection layer and a second connection layer; removing the second photoresist layer to reveal the connection portions and the bearing portions; removing the first outer lateral areas; reflowing the second connection layers to form plural composite bumps; removing the second outer lateral areas to make the first base areas and the second base areas form plural under bump metallurgy layers.