Patent ID: 9711358
Date: 2017-07-18
CPC Classifications: H01L

Claim:
1. A method of forming a non-continuous line pattern, comprising: providing a substrate; forming a directed self-assembly (DSA) material layer on the substrate; performing a phase separation process of the DSA material layer to form an ordered periodic pattern that includes a plurality of first polymer structures and a plurality of second polymer structures arranged alternately; forming a first mask to cover a first portion of the ordered periodic pattern; performing a first etching process to remove a portion of the first polymer structures exposed by the first mask; removing the first mask; forming a second mask to cover a second portion of the ordered periodic pattern, wherein an interval exists between adjacent boundaries of the second portion and the first portion of the ordered periodic pattern; performing a second etching process to remove a portion of the second polymer structures exposed by the second mask; and removing the second mask, wherein the remaining first polymer structures and the remaining second polymer structures are not connected to each other.