Patent ID: 9543201
Date: 2017-01-10
CPC Classifications: H01L

Claim:
1. A method for forming a three-dimensional interconnection in which a contact plug is formed within a through hole provided in a substrate or an electrically insulative film and an upper wire formed on an upper side of the substrate or the electrically insulative film and a lower wire formed on a lower side of the substrate or the electrically insulative film are electrically connected to one another by the contact plug, the method comprising: forming a coating film on an upper surface of the substrate or the electrically insulative film and on an inner surface of the through hole or an inner surface of the blind via hole by applying a metal film-forming composition containing at least one of a salt of and a particle of a metal selected from Group 10 and Group 11 of the Periodic Table to the substrate or the electrically insulative film provided with the through hole or to the substrate or the electrically insulative film provided with the blind via hole becoming the through hole; forming a metal film by heating the coating film, plating by filling up the through hole or the blind via hole by depositing a conductor on the metal film by a plating process using the metal film as a seed layer; and removing, by a chemical mechanical polishing process, an excess conductor deposited in the plating.