Patent ID: 7384865

Claim:
A method of forming a metal line in a semiconductor device, the semiconductor device being electrically connected to a lower substrate and exposed upward, the method comprising: forming a lower insulation layer on the lower substrate; forming a first metal line on a part of the lower insulation layer; sequentially forming a first oxide layer, an FSG layer, and a second oxide layer on the lower insulation layer and the first metal line; removing the first oxide layer, the FSG layer, and the second oxide layer so as to expose the first metal line, wherein the second oxide layer on the lower insulation layer and the first metal line is completely removed; forming an upper insulation layer on the lower insulation layer and the first metal line; forming a contact hole by etching the upper insulation layer so as to expose the first metal line; and forming a second metal line by depositing a metal material in the contact hole.