Semiconductor device and manufacturing method thereof

摘要

A BGA type semiconductor device having high reliability is offered. A pad electrode (53) is formed on a surface of a semiconductor substrate (51) and a glass substrate (56) is bonded to the surface of the semiconductor substrate. A via hole (VH) is formed from a back surface of the semiconductor substrate (51) to reach a surface of the pad electrode (53). An insulation film is formed on an entire back surface of the semiconductor substrate (51) including an inside of the via hole (VH). A cushioning pad (60) is formed on the insulation film. The insulation film is removed from a bottom portion of the via hole (VH) by etching. A wiring (63) connected with the pad electrode (53) is formed to extend from the via hole (VH) onto the cushioning pad (60). A conductive terminal (66) is formed on the wirinq (63). Then the semiconductor substrate (51) is separated into a plurality of semiconductor dice.