Patent ID: 8835325
Filing Date: 2014-09-16
Classification: H01L

Abstract:
1. A method of manufacturing a semiconductor device, comprising the steps of: performing a self-assembly process for a coating of block copolymer that is copolymerized by two or more types of monomers, such that at least one monomer in said block copolymer is self-assembled, so as to form a pattern for said at least one monomer; depositing a metal or a metal nitride coating on a planar surface of said block copolymer and forming the metal or metallic nitride coating only on the planar surface of one of said at least one monomer due to preferential chemical affinity, wherein when the deposited metal or metal nitride coating commences lateral growth so as to cover other surface portions of said block copolymer, continue depositing the metal or metallic nitride coating but cease said depositing and said lateral growth before the entire surface of said block copolymer is completely covered; and etching, by using the deposited metal or metal nitride coating as a mask, to remove a portion of the block copolymer that is not covered by the deposited metal or metal nitride coating, thereby forming a trench.