摘要:
Provided are methods of fabricating thin film structures that involve assembling block copolymer materials in the presence of condensed phase surfaces on both sides of the thin film, at least one of which is a chemically patterned surface configured to direct the assembly of the block copolymer material. According to various embodiments, the other of the condensed phase surfaces can be a chemically homogenous surface or a chemically patterned surface. Also provided are structures, morphologies, and templates formed in the domain structure of block copolymer materials. In certain embodiments, complex 3-D morphologies and related structures not present in bulk block copolymer materials are provided.
摘要:
Provided are methods of fabricating thin film structures that involve assembling block copolymer materials in the presence of condensed phase surfaces on both sides of the thin film, at least one of which is a chemically patterned surface configured to direct the assembly of the block copolymer material. According to various embodiments, the other of the condensed phase surfaces can be a chemically homogenous surface or a chemically patterned surface. Also provided are structures, morphologies, and templates formed in the domain structure of block copolymer materials. In certain embodiments, complex 3-D morphologies and related structures not present in bulk block copolymer materials are provided.
摘要:
Provided herein are block copolymer thin film structures and methods of fabrication. The methods involve directing the assembly of ABA triblock copolymers such that desired features are formed by domains of the assembled ABA triblock copolymer. In some embodiments, an ABA triblock copolymer is directed to assemble by a chemical pattern. Chemical patterns with periods much different than the natural period of the ABA triblock copolymer may be used to direct assembly of the ABA triblock copolymer.
摘要:
Provided herein are methods of formulating and engineering block copolymer (BCP) systems for directed self-assembly (DSA) processes. In some embodiments, the methods involve engineering a BCP material based on the interaction parameter (χ) of the material and the surface and/or interaction energies of its constituent blocks. Also provided are novel block BCP materials that can be used in DSA techniques. In some embodiments, the BCP systems described herein have micro-phase separating blocks, with at least one block including multiple types of repeat units. Also provided are structures formed by DSA, including structures having a sub-20 nm dimension. Applications included nanolithography for semiconductor devices, fabrication of cell-based assays, nanoprinting, photovoltaic cells, and surface-conduction electron-emitter displays.
摘要:
Provided herein are block copolymer thin film structures and methods of fabrication. The methods involve directing the assembly of ABA triblock copolymers such that desired features are formed by domains of the assembled ABA triblock copolymer. In some embodiments, an ABA triblock copolymer is directed to assemble by a chemical pattern. Chemical patterns with periods much different than the natural period of the ABA triblock copolymer may be used to direct assembly of the ABA triblock copolymer.
摘要:
A method for making a master mold used to nanoimprint patterned magnetic recording disks that have chevron servo patterns with minimal defects uses directed self-assembly of block copolymers. A pattern of chemically modified polymer brush material is formed on the master mold substrate. The pattern includes sets of slanted stripes and interface strips between the sets of slanted stripes. A block copolymer material is deposited on the pattern, which results in directed self-assembly of the block copolymer as lamellae perpendicular to the substrate that are formed into alternating slanted stripes of alternating first and second components of the block copolymer. This component also forms on the interface strips, but as a lamella parallel to the substrate. One of the components is then removed, leaving the remaining component as a grid that acts as a mask for etching the substrate to form the master mold. The disks nanoimprinted by the master mold have reduced defective areas in the transition regions of the chevron servo patterns.
摘要:
Provided are novel methods of fabricating block copolymer thin film structures that allow control over both the lateral structure and vertical orientation of the thin films. In some embodiments, the methods involve directing the assembly of a block copolymer thin film between a chemically patterned surface and a second surface such that the thin film includes domains that are oriented perpendicularly through the thickness of the thin film. In certain embodiments, the second surface can be preferential at least one block of the block copolymer. In certain embodiments, the second surface can be a homopolymer. Also provided are thin film block copolymer structures having perpendicular orientations through the thickness of the thin films. The methods and structures may include block copolymers having large interaction parameters (χ's) and small domain sizes.
摘要:
Perpendicular nanostructures with small feature dimensions in thin films and related methods of fabrication are provided. In some embodiments, the methods include directed assembly of poly(styrene-b-glycolic acid) (PS-b-PGA), poly(styrene-b-lactic acid) (PS-b-PLA) and other block copolymers containing PGA or a derivative thereof. The block copolymer films can be directed to assemble on chemical patterns such that the nanostructures extend through the thickness of the film, without forming a wetting layer at the free surface. The nanostructures can have sub-10 nm feature dimensions.
摘要:
A method for making a master mold used to nanoimprint patterned magnetic recording disks that have chevron servo patterns with minimal defects uses directed self-assembly of block copolymers. A pattern of chemically modified polymer brush material is formed on the master mold substrate. The pattern includes sets of slanted stripes and interface strips between the sets of slanted stripes. A block copolymer material is deposited on the pattern, which results in directed self-assembly of the block copolymer as lamellae perpendicular to the substrate that are formed into alternating slanted stripes of alternating first and second components of the block copolymer. This component also forms on the interface strips, but as a lamella parallel to the substrate. One of the components is then removed, leaving the remaining component as a grid that acts as a mask for etching the substrate to form the master mold. The disks nanoimprinted by the master mold have reduced defective areas in the transition regions of the chevron servo patterns.
摘要:
Provided are methods of patterning block copolymer (BCP) films with independent control of the size, periodicity and morphology of the resulting nanoscale domains. Also disclosed are BCP patterns having discrete areas of different self-assembled BCP thin films on a surface, the BCP thin films differing in one or more of molecular weight (MW), composition, morphology, and feature size. In some implementations, multiple BCPs with different MWs can be printed onto a single substrate, thereby providing access to patterns with diverse geometries and feature sizes. The printing approaches can be applied to various BCP chemistries, morphologies and directed self-assembly (DSA) strategies. Also provided are methods of forming BCP thin films on patterns of polymer brushes formed by electrohydrodynamic printing. The methods involve direct, high resolution electrohydrodynamic delivery of random copolymer brushes as surface wetting layers to control the geometries of nanoscale domains in spin-cast and printed BCPs.