Patent ID: 7838394

Claim:
A method of manufacturing a semiconductor device comprising: stacking a first surface of a wafer-state semiconductor substrate provided with a plurality of external connection electrodes on a first surface of a support film; cutting the wafer-state semiconductor substrate stacked on the first surface of the support film into a plurality of chip size semiconductor substrates, wherein chip size semiconductor substrates adjacent to each other are separated from each other, and wherein each of the plurality of chip size semiconductor substrates is provided with at least one of the plurality of external connection electrodes; and when said plurality of chip size semiconductor substrates, which are adjacent to each other, are separated from each other, forming at least one protection film: (i) on a second surface of the plurality of the chip size semiconductor substrates, which is opposite to the first surface of the wafer-state semiconductor substrate, and (ii) on a peripheral side surface of each of the plurality of the chip size semiconductor substrates.