Patent ID: 9107291
Filing Date: 2015-08-11
Classification: G03F,H05K

Abstract:
1. A method of patterning a material layer on a substrate, said method comprising: providing a substrate with a material layer thereupon; applying a solution of a self-assembling material to a chemical pattern layer over said material layer to form lamellae, wherein said chemical pattern layer comprises first regions and second regions that include chemically distinct first and second materials, respectively, wherein one of said first and second materials comprises an etch-resistant material such that said first and second materials possess substantially different etch resistances, wherein said lamellae comprise alternating first and second domains composed of chemically distinct first and second polymeric block components, respectively, and said first and second domains have a first width and a second width, respectively, and have a characteristic pitch that is equal to a sum of said first width and said second width, wherein physically exposed top surfaces of said first regions and said second regions complementarily overlie an entirety of said substrate, wherein said first regions include a prepattern having alignment-conferring prepattern portions and at least one masking feature prepattern portion, wherein said first regions have a preferential affinity for said first domains, wherein said alignment-conferring prepattern portions comprise lengthwise strips having widths substantially equal to said first width of said first domains, and lengthwise center lines located at positions laterally separated from one another by distances substantially equal to integer multiples of a unit distance, said unit distance being substantially equal to said characteristic pitch, wherein each of said at least one masking feature prepattern portions has a width greater than said first width of said first domains or has a lengthwise center line located at a position laterally separated from said lengthwise center line of an alignment-conferring prepattern portion by a distance different from an integer multiple of said unit distance, wherein at least one of said first domains is formed over said alignment-conferring prepattern portions, and wherein said at least one first domain so formed are aligned to said alignment-conferring prepattern portions, and wherein subsets of said first and second domains that are formed over said second regions or over said at least one masking feature prepattern portions self-align with a subset of said first domains that is formed over said alignment-conferring prepattern portions to form aligned lamellar structures oriented substantially perpendicular to said substrate; selectively removing, by an etch process, said first domains or said second domains to form an etched self-assembled pattern; and transferring said etched self-assembled pattern selectively through either physically exposed portions of said first regions or physically exposed portions of said second regions of said chemical pattern layer into said material layer by at least one etch process to form a composite pattern including a union of said etched self-assembled pattern and said prepattern within said material layer, whereby said material layer is transformed into a patterned material layer containing said transferred pattern.