Patent ID: 7867826
Filing Date: 2011-01-11
Classification: H01L

Abstract:
1. A manufacturing method of a semiconductor device comprising: preparing a semiconductor substrate in a wafer state which has a plurality of connection pads and a plurality of integrated circuits; forming a plurality of external connection electrodes on the semiconductor substrate in the wafer state; forming a first sealing film made of a first sealing material on the semiconductor substrate around the external connection electrodes, the first sealing material having each impurity concentration of an Na ion, a K ion, a Ca ion and a Cl ion which is not greater than 10 ppm; cutting the semiconductor substrate in the wafer state and the first sealing film to form grooves having a predetermined width which divide the semiconductor substrate into each semiconductor substrate; forming a second sealing film consisting of a second sealing material on a lower surface of the semiconductor substrates including the inside of the grooves, the second sealing material having a total impurity concentration of an Na ion, a K ion, a Ca ion and a Cl ion which is not smaller than 100 ppm; and cutting the second sealing film formed in the grooves on the inner side of the grooves having the predetermined width in order to divide the semiconductor substrate in the wafer state into the plurality of semiconductor substrates each having the integrated circuit and connection pad.