Patent ID: 6607970
Filing Date: 2003-08-19
Classification: H01L

Abstract:
A method of manufacturing a semiconductor device comprising:preparing a semiconductor wafer having an upper surface including chip-forming regions, a lower surface opposing the upper surface, sides extending between the upper and lower surfaces, and a plurality of outer connection terminals formed on the upper surface; making trenches in parts of the semiconductor wafer which lie between the chip-forming regions, each trench successively extending to half a thickness of the semiconductor wafer from the upper surface of the semiconductor wafer; forming a first seal film on the upper surface of the semiconductor wafer in a manner such that the trenches are filled and such that a top surface of each of the outer connection terminals is exposed; forming a second seal film on the lower surface of the semiconductor wafer; and cutting the first seal film along the trenches by removing parts of the first seal film having a smaller width than the trenches such that the semiconductor wafer is separated into individual semiconductor devices, each of which has the first seal film provided on an upper surface thereof and on an upper part of a periphery thereof while leaving a lower part of the periphery thereof exposed, and each of which has the second seal film provided on the lower surface thereof.