id="p0005">How geometrical features of tracks are affected by laser power and affect lack of fusion (LOF) have been revealed.
id="p0010">There is a small range of power within which increasing power rapidly reduces the amount of the normal LOF to a low value.
id="p0015">Above the referred power range, a low amount of LOF remains, due to the presence of a spatter related and large LOF defect.
id="p0020">Deeper penetration using high power aids the reduction of the spatter related LOF.