Patent ID: 7534657
Filing Date: 2009-05-19
Classification: H01L

Abstract:
1. A method of manufacturing a semiconductor device comprising the steps of: forming a plurality of product formation areas each having a circuit and a plurality of first electrode pads on a main surface of a semiconductor wafer; forming a protective film over the circuit; forming a plurality of second electrode pads using a rewiring process over said protective film, each of the plurality of second electrode pads being electrically connected to a respective first electrode pad via a rewiring layer, the second electrode pads having larger pitches than the first electrode pads in each of the product formation areas; forming a bump electrode over each of the second electrode pads; segmenting the semiconductor wafer to separate the plural product formation areas and making a plurality of semiconductor chips each having the circuit, the plural first electrode pads, the plural second electrode pads, the bump electrodes and the rewiring layers over a first surface thereof; and after the segmenting step, inspecting the plural product formation areas, wherein the inspecting step includes a sub-step, after the segmenting step, of cleaning foreign matter adhered to the first surface of the semiconductor chip, and wherein the cleaning step is performed by spraying dry ice particles to the first surface of each of the semiconductor chips.