Abstract: Provided herein is a method, including forming a first template including a first pattern, wherein forming the first template includes self-assembly of diblock copolymers guided by an initial pattern; forming a second template including a second pattern, wherein the second pattern corresponds to a servo pattern; and forming a master template from the first template, wherein the master template includes one or more portions of the first pattern combined with the second pattern.

Abstract: Provided herein is a method, including a) transferring an initial pattern of an initial template to a substrate; b) performing block copolymer self-assembly over the substrate with a density multiplication factor k; c) creating a subsequent pattern in a subsequent template with the density multiplication factor k; and d) repeating steps a)-c) with the subsequent template as the initial template until a design specification for the subsequent pattern with respect to pattern density and pattern resolution is met.

Abstract: Provided herein is a method, including etching a first pattern into a mask, wherein the first pattern includes a first set of features corresponding to features of an imprint template; forming a second set of features over and in-between the first set of features by directed self-assembly of a block copolymer composition, wherein the first and second sets of features combine to form a second pattern; and etching the second pattern into a substrate.

Abstract: Provided herein is a method, including forming a first template including a first pattern, wherein forming the first template includes self-assembly of diblock copolymers guided by an initial pattern; forming a second template including a second pattern, wherein the second pattern corresponds to a servo pattern; and forming a master template from the first template, wherein the master template includes one or more portions of the first pattern combined with the second pattern.

Abstract: Provided herein is a method, including etching a first pattern into a mask, wherein the first pattern includes a first set of features corresponding to features of an imprint template; forming a second set of features over and in-between the first set of features by directed self-assembly of a block copolymer composition, wherein the first and second sets of features combine to form a second pattern; and etching the second pattern into a substrate

Abstract: Provided herein is a method, including a) transferring an initial pattern of an initial template to a substrate; b) performing block copolymer self-assembly over the substrate with a density multiplication factor k; c) creating a subsequent pattern in a subsequent template with the density multiplication factor k; and d) repeating steps a)-c) with the subsequent template as the initial template until a design specification for the subsequent pattern with respect to pattern density and pattern resolution is met.

Abstract: Apparatuses, devices, and systems are presented with servo and data pattern formation using multi-dot arrays. In one example, an apparatus may comprise a data storage medium including a first patterned array of dots of magnetic material, a second patterned array of dots of magnetic material, and a non-magnetic space located between the first patterned array and second patterned array. In another example, a system may comprise a processor configured to store data to a data storage medium, the data storage medium including a first dot composite including a first patterned array of dots of magnetic material, a second dot composite including a second patterned array of dots of magnetic material, and a non-magnetic space located between the first dot composite and second dot composite. An order in which a dot composite and a non-magnetic space occur may define the value of one bit.

Abstract: A given reference pattern is written on bit patterned media that has an initial reference pattern already disposed thereon. A write phase and frequency is detected based on the initial reference pattern and the given reference pattern is written on the bit patterned media at the detected write phase and frequency.

Abstract: The embodiments disclose a method of self-aligned fully integrated stack fabrication that includes writing fully integrated self-aligned data and servo two dimensional low-frequency guiding patterns that include encoded servo-information to create various types of self-assembly low-frequency guiding structures, guiding high density self-assembly processes using the low-frequency guiding structures to create high density data and servo fields and etching the high density data and servo fields and low-frequency encoded servo-information into a template substrate to create fully integrated stack master templates to use in the fabrication of stacks such as bit patterned media.

Abstract: A given reference pattern is written on bit patterned media that has an initial reference pattern already disposed thereon. A write phase and frequency is detected based on the initial reference pattern and the given reference pattern is written on the bit patterned media at the detected write phase and frequency.

Abstract: The embodiments disclose a method for fabricating high contrast stacks, including depositing materials on a substrate to form an antiferromagnetic coupling thin film layer on top of a first half of the magnetic layer of a stack, depositing a portion of a second half of the magnetic layer on top of the antiferromagnetic coupling thin film layer to couple the first and second half of the magnetic layers to the antiferromagnetic coupling thin film layer and bit-patterning a portion of the second half of the magnetic layer and the antiferromagnetic coupling thin film layer.

Abstract: The embodiments disclose a method for patterning a stack, including embedding servo patterns within a final template and creating positions of plural cross-tracked shifted position error signal (PES) fields incrementally from the embedded servo patterns on the final template.

Abstract: Imprinted apparatuses, such as Bit-Patterned Media (BPM) templates, Discrete Track Recording (DTR) templates, semiconductors, and photonic devices are disclosed. Methods of fabricating imprinted apparatuses using a combination of patterning and block copolymer (BCP) self-assembly techniques are also disclosed.

Abstract: This disclosure describes a method for nano-patterning by incorporating one or more block copolymers and one or more nano-imprinting steps in the fabrication process. The block copolymers may be comprised of organic or organic components, and may be lamellar, spherical or cylindrical. As a result, a patterned medium may be formed having one-dimensional or two-dimensional patterns with a feature pitch of 5-100 nm and/or a bit density of at least 1 Tdpsi.

Abstract: Recording media comprises multiple first and second patterned media islands sequentially placed at different first and second radii along a length of a recording track. A recording head sequentially accesses the first and second islands as the head moves along a length of the recording track. Circumferential spacings between sequential first and second islands along the length of the track vary as a skew function of a track radius.

Abstract: A method is disclosed for determining position information of a transducer. At least a first code and a second code are chosen. The first code has different characteristics than the second code. User data written to a first sub-track is encoded with the first code and user data written to a second sub-track is encoded with the second code. The first code read from the first sub-track is obtained and the second code read from the second sub-track is obtained. Position information of the transducer is extracted from the obtained characteristics of the first code and the obtained characteristics of the second code.

Abstract: Recording media comprises multiple first and second patterned media islands sequentially placed at different first and second radii along a length of a recording track. A recording head sequentially accesses the first and second islands as the head moves along a length of the recording track. Circumferential spacings between sequential first and second islands along the length of the track vary as a skew function of a track radius.

Abstract: A method is disclosed for determining position information of a transducer. At least a first code and a second code are chosen. The first code has different characteristics than the second code. User data written to a first sub-track is encoded with the first code and user data written to a second sub-track is encoded with the second code. The first code read from the first sub-track is obtained and the second code read from the second sub-track is obtained. Position information of the transducer is extracted from the obtained characteristics of the first code and the obtained characteristics of the second code.

Abstract: A magnetic recording medium comprises a magnetically soft underlayer having a plurality of cavities in a surface thereof, and a magnetic recording material in the cavities, wherein a surface of the magnetic recording material in the cavities is substantially coplanar with the surface of the soft underlayer. A recording system that includes the recording medium is also included.

Abstract: A magnetic field transducer includes a phase transition material exhibiting a change from an antiferromagnetic phase to a ferromagnetic phase when heated above a critical temperature, means for applying a magnetic bias field to the phase transition material, and means for heating the phase transition material above the critical temperature. Magnetic recording heads that include the transducer and magnetic disc drives that include the magnetic recording heads are also described. A method of producing a magnetic field pulse including applying a magnetic bias field to a phase transition material, and heating the phase transition material to cause the phase transition material to change from an antiferromagnetic phase to a ferromagnetic phase, is also provided. The phase transition material can comprise a rare earth-transition metal alloy, where the alloy is heated above a compensation temperature.