Patent ID: 6969669
Filing Date: 2005-11-29
Classification: H01L

Abstract:
1. A method of manufacturing a semiconductor device for obtaining the semiconductor device divided into individual pieces of semiconductor elements by cutting a semiconductor wafer, the primary component of which is silicon, on the first face of which the plurality of semiconductor elements are formed, by means of plasma dicing, the method of manufacturing the semiconductor device comprising: a step of forming an etching stop layer on the first face side at positions corresponding to cutting lines which are set by dividing the semiconductor wafer into the individual pieces, the etching stop layer containing material, the etching rate of the material by plasma, in which a first plasma generating gas of mixed gas containing fluorine gas is used, being lower than an etching rate of etching silicon by plasma in which the first plasma generating gas is used; a step of attaching a protective sheet, which is capable of being peeled off, onto the first face to form a mask for determining the cutting lines on a second face opposite to the first face; a first plasma dicing step of etching silicon from the second face side by plasma of the first plasma generating gas; and a second plasma dicing step of etching the etching stop layer, which is exposed in the first plasma dicing step, by a second plasma generating gas capable of etching at a higher etching rate than the etching rate of the first plasma generating gas.