Abstract: The multilayer copper foil includes: a recrystallization active layer disposed on a surface of a substrate; and a recrystallization suppressing layer disposed on a surface of the recrystallization active layer to inhibit recrystallization of the recrystallization active layer, wherein a concentration of impurities within the recrystallization suppressing layer is greater than a concentration of impurities within the recrystallization active layer.

Abstract: A positive electrode active material particle according to one aspect of the present invention may include a lithium composite oxide particle and a coating material including a coating element, in which the lithium composite oxide particle is a secondary particle formed by aggregation of two or more primary particles, the coating material is included on a surface of the secondary particle, the coating material is included in a grain boundary between the primary particles, calcium (Ca) is included in the positive electrode active material particle, and a calcium (Ca) content X included in the positive electrode active material is 0.003 mol %?X?0.03 mol %.

Abstract: A positive electrode active material precursor according to one aspect of the present invention may be a precursor including a plurality of hydroxide particles, and may satisfy Relational Expression 1 below in an XRD pattern obtained through Rietveld fitting as a result of X-ray diffraction (XRD) analysis using a CuK? ray: 0.82 ? FWHM ( 1 ? 0 ? 2 ) ? 1.22 , [ Relational ? Expression ? 1 ] wherein a positive electrode active material precursor according to one aspect of the present invention may be also a precursor including a plurality of oxide particles, and may satisfy Relational Expression 2 below in an XRD pattern obtained through Rietveld fitting as a result of X-ray diffraction (XRD) analysis using a CuK? ray: 127 ? XRD ? peak ? Integral ? breadth / 4 ? tan ? ? ? 137 , [ Relational ? Expression ? 2 ] wherein, in above Relational Expression 1, said FWHM(102) means a full width at half maximum (FWHM(deg.

Abstract: A positive electrode active material according to one aspect of the present invention may be a lithium composite oxide, and may satisfy Relational Expression 1 below in an XRD pattern obtained through Rietveld fitting as a result of X-ray diffraction (XRD) analysis using a CuK? ray: 0.110?FWHM(104)?0.170,??[Relational Expression 1] wherein the positive electrode active material according to one aspect of the present invention may include: preparing a first lithium composite oxide by primarily heat-treating a first mixture including the prepared oxide precursor, a lithium-containing compound, and a first cobalt-containing compound.

Abstract: A positive electrode active material including a first lithium composite oxide particle including a secondary particle formed by aggregation of one or more primary particles, and a coating oxide occupying at least a part of at least one of surfaces of the secondary particle, grain boundaries between the primary particles, or surfaces of the primary particles, the positive electrode active material satisfying an equation of 1.3?a/b?3.0, wherein a represents a max peak intensity at 2theta=44.75° to 44.80° and b represents a max peak intensity at 2theta=45.3° to 45.6° in X-ray diffraction (XRD) analysis using Cu K? radiation.

Abstract: A positive electrode active material including a first lithium composite oxide particle including a secondary particle formed by aggregation of one or more primary particles, and a coating oxide occupying at least a part of at least one of surfaces of the secondary particle, grain boundaries between the primary particles, or surfaces of the primary particles, the positive electrode active material satisfying an equation of 1.3?a/b?3.0, wherein a represents a max peak intensity at 2theta=44.75° to 44.80° and b represents a max peak intensity at 2theta=45.3° to 45.6° in X-ray diffraction (XRD) analysis using Cu K? radiation.

Abstract: A display device according to an embodiment includes: a display panel; a first flexible printed circuit board electrically connected to the display panel; and a protective film attached to the first flexible printed circuit board, wherein the protective film includes: a cover layer; a support layer disposed between the cover layer and the first flexible printed circuit board; a first adhesive layer attaching the cover layer and the support layer; and a second adhesive layer attaching the support layer to the first flexible printed circuit board and including a first adhesive portion and a second adhesive portion having different adhesive forces.

Abstract: The present invention relates to a positive electrode active material and a lithium secondary battery using the same, and more particularly, to a bimodal-type positive electrode active material including a first lithium composite oxide as a small particle and a second lithium composite oxide as a large particle, which improves the transport ability of lithium ions by controlling the morphology or crystal structure of the small particle included in the positive electrode active material, and further alleviates or prevents the early deterioration or shortened lifetime of the bimodal-type positive electrode active material, caused by the small particle, by increasing the particle stability of the small particle, and a lithium secondary battery using the same.

Abstract: The multilayer copper foil includes: a recrystallization active layer disposed on a surface of a substrate; and a recrystallization suppressing layer disposed on a surface of the recrystallization active layer to inhibit recrystallization of the recrystallization active layer, wherein a concentration of impurities within the recrystallization suppressing layer is greater than a concentration of impurities within the recrystallization active layer.

Abstract: Provided is a biopsy needle with an electrode array which measures impedance for a plurality of biopsy points in real time, in which the needle includes electrode patterns configured by a plurality of electrode arrays on the surface, and the electrode patterns are spaced apart from each other along the top and bottom of the needle. According to the present invention, it is possible to selectively measure a predetermined tissue around the needle according to a direction of electrode formation and the number of electrodes while measuring impedance by using a plurality of electrodes by proposing a biopsy needle with a plurality of electrode arrays on a surface.

Abstract: Provided is an optical system for a thermal image microscope. The optical system includes an image forming unit and a relay unit. The image forming unit forms a focus. The relay unit elongates an optical path. Here, the image forming unit includes six lenses. The relay unit includes two lenses. Aspherical surfaces of the lenses are all convex surfaces.

Abstract: Provided is an optical system for a thermal image microscope. The optical system includes an image forming unit and a relay unit. The image forming unit forms a focus. The relay unit elongates an optical path. Here, the image forming unit includes six lenses. The relay unit includes two lenses. Aspherical surfaces of the lenses are all convex surfaces.