Patent ID: 7790612
Filing Date: 2010-09-07
Classification: H01L

Abstract:
1. A method for forming a wiring structure, the method comprising: forming an undercoat insulating layer that includes a flat upper surface on a substrate; forming a seed layer made of copper on the flat upper surface of the undercoat insulating layer; heating the seed layer by irradiating the seed layer with light emitted from at least one flash tube to increase a crystal grain size of the seed layer; partially covering the flat upper surface of the seed layer with a covering layer to expose at least one region of an upper surface of the seed layer; forming a metal layer made of copper on the exposed region of the flat upper surface of the seed layer of which crystal grain size has been increased, by a non-electrolytic plating method; and decreasing the resistivity of the metal layer to 1.7 to 1.8 μΩcm by annealing the metal layer on the substrate contained in a container in which an inert gas is introduced, by irradiating the metal layer with light emitted from at least one flash tube.