Patent ID: 9673050
Date: 2017-06-06
CPC Classifications: H01L

Claim:
1. A method of patterning a substrate, the method comprising: providing a substrate having a first relief pattern positioned on a target layer, the first relief pattern defining one or more openings such that portions of the target layer are elevationally uncovered, the first relief pattern being created from two or more component patterns formed in-plane with each other; forming first sidewall spacers on vertical surfaces of the first relief pattern; transferring a first combined pattern into the target layer, the first combined pattern defined by the first relief pattern and the first sidewall spacers; removing the first relief pattern such that first sidewall spacers remain; forming a second relief pattern on the substrate, the second relief pattern defining one or more openings such that portions of the target layer are elevationally uncovered and portions of the first sidewall spacers are elevationally uncovered; and transferring a second combined pattern into the target layer, the second combined pattern defined by the second relief pattern and the first sidewall spacers, wherein the target layer defines a pattern of structures prior to providing the first relief pattern on the substrate and prior to forming the first sidewall spacers.