Abstract:
Provided are a method of manufacturing a photomask, in which a hardmask film pattern is used as an etch mask for etching a phase-shift layer under the hardmask film pattern, a blankmask, and a photomask using the blankmask. In the method, a resist film for patterning a hardmask film may be formed to a thin thickness, and the phase-shift layer may be etched using the hardmask film pattern having a high etch selectivity with respect to the phase-shift layer. Accordingly, an optical density may be maintained to be 3.0 due to use of a light-shielding film pattern, thereby increasing the resolution and precision of a pattern, reducing a loading effect, and improving critical dimension (CD) features, such as CD uniformity and CD linearity.
Abstract:
A near-field exposure mask according to an embodiment includes: a substrate; a concave-convex structure having convexities and concavities and formed on one surface of the substrate; a near-field light generating film arranged at least on a tip portion of each of the convexities, the near-field light generating film being a layer containing at least one element selected from the group consisting of Au, Al, Ag, Cu, Cr, Sb, W, Ni, In, Ge, Sn, Pb, Zn, Pd, and C, or a film stack formed with layers made of some of those materials; and a resin filled in each of the concavities.
Abstract:
Any defects in the reflective multilayer coating or absorber layer of an EUV mask are problematic in transferring a pattern of the EUV mask to a wafer since they produce errors in integrated circuit patterns on the wafer. In this regard, a method of manufacturing an EUV mask is provided according to various embodiments of the present disclosure. To repair the defect, a columnar reflector, which acts as a Bragg reflector, is deposited according to various embodiments so as to locally compensate and repair the defect. According to the embodiments of the present disclosure, the reflective loss due to the defect can be compensated and recover the phase different due to the defect from, so as to form a desirable wafer printed image.
Abstract:
A photomask having a machine-readable identifying mark and suitable for manufacturing integrated circuit devices and a method for forming the photomask and identifying mark are disclosed. An exemplary embodiment includes receiving a design layout corresponding to a pattern to be formed on a photomask blank. A specification of an identifying code is also received along with the photomask blank, which includes a substrate, a reflective layer, and an absorptive layer. A first patterning is performed using the design layout. A second patterning is performed using the specification of the identifying code.
Abstract:
It is intended to provide a photocured product that is prepared using the photo-imprint method and has favorable pattern precision and improvement in pattern defects. The present invention provides a photocured product obtained by irradiating a coating film in contact with a mold with light, the photocured product containing a fluorine atom-containing surfactant, wherein of secondary ion signals obtained by the surface analysis of the photocured product based on time-of-flight secondary ion mass spectrometry, the intensity of a C2H5O+ ion signal is higher than that of a C3H7O+ ion signal.
Abstract:
A method of making a lithography mask with a stress-relief treatment is disclosed. The method includes providing a substrate and depositing an opaque layer on the substrate. The opaque layer is patterned to form a patterned mask. A stress-relief treatment is applied to the patterned mask by using an radiation exposure.
Abstract:
A method for fabricating an extreme ultraviolet (EUV) mask includes providing a low thermal expansion material (LTEM) layer. A reflective multiple-layer (ML) is deposited over the LTEM layer. A flowable-photosensitive-absorption-layer (FPhAL) is spin coated over the reflective ML. The FPhAL is patterned by a lithography process to form a patterned absorption layer.
Abstract:
Various non-planar reflective lithography masks, systems using such lithography masks, and methods are disclosed. An embodiment is a lithography mask comprising a transparent substrate, a reflective material, and a reticle pattern. The transparent substrate comprises a curved surface. The reflective material adjoins the curved surface of the transparent substrate, and an interface between the reflective material and the transparent substrate is a reflective surface. The reticle pattern is on a second surface of the transparent substrate. A reflectivity of the reticle pattern is less than a reflectivity of the reflective material. Methods for forming similar lithography masks and for using similar lithography masks are disclosed.
Abstract:
A mask manufacturing apparatus includes a laser irradiator, a stage, a frame, and a heat spreader sheet. The laser irradiator divides a laser beam into a plurality of sub-laser beams and irradiates the sub-laser beams to a shadow mask material which is placed over a stage. The frame is disposed over the stage to support the shadow mask material. The heat spreader sheet makes contact with the shadow mask material, absorbs heat generated from the shadow mask material, and dissipates the heat to surroundings of the shadow mask material. Accordingly, the shadow mask material is protected from overheating.
Abstract:
Mask writing techniques that employ multiple masking writing passes. A first writing pass is made to write a first shot pattern having a first resolution. A second writing pass is then made to write a second shot pattern having a second resolution finer than the first resolution, such that the second shot pattern substantially overlaps with the first shot pattern on the mask substrate.