Abstract: A graft copolymer, and a graft copolymer composition having excellent particulate dispersibility in a curable resin such as an epoxy resin and is applicable as a particulate impact reinforcing agent, a curable resin composition including same, and methods of preparing them.

Abstract: A method for fabricating semiconductor device includes forming an alternating stack that includes a lower multi-layered stack and an upper multi-layered stack by alternately stacking a dielectric layer and a sacrificial layer over a substrate, forming a vertical trench that divides the upper multi-layered stack into dummy stacks, and forming an asymmetric stepped trench that is extended downward from the vertical trench to divide the lower multi-layered stack into a pad stack and a dummy pad stack, wherein forming the asymmetric stepped trench includes forming a first stepped sidewall that is defined at an edge of the pad stack, and forming a second stepped sidewall that is defined at an edge of the dummy pad stack and occupies less area than the first stepped sidewall.

Abstract: The present invention relates to a graft copolymer, and to a core-shell type graft copolymer comprising: a core comprising a rubbery polymer; and a shell formed by graft polymerizing a graft monomer to the rubbery polymer, wherein the graft copolymer comprises the core in 72 wt % to 83 wt %, the core has an average particle diameter of 250 nm or more, and the shell has a weight average molecular weight of 40,000 g/mol or less, a curable resin composition including the same, and methods of preparing them.

Abstract: A core-shell copolymer, a method of making the same, and a thermoplastic resin including the same are disclosed herein. In some embodiments, a core-shell copolymer including a core and a shell surrounding the core, wherein the core includes a first alkyl(meth)acrylate monomer-derived repeating unit having 1 to 8 carbon atoms and a terminal-modified polydimethylsiloxane crosslinking agent-derived crosslinking part wherein the terminal-modified polydimethylsiloxane crosslinking agent includes a second alkyl(meth)acrylate monomer-derived modified part at both terminals of the polydimethylsiloxane.

Abstract: Provided is a core-shell copolymer, and in particular, a core-shell copolymer including a core and a shell surrounding the core, wherein the core includes a conjugated diene monomer-derived repeating unit, an aromatic vinyl monomer-derived repeating unit, and an aromatic (meth)acrylate monomer-derived repeating unit, the shell includes an alkyl (meth)acrylate monomer-derived repeating unit, an aromatic vinyl monomer-derived repeating unit, and an aromatic (meth)acrylate monomer-derived repeating unit, the core has a particle size of 800 ? to 900 ?, the core-shell copolymer has a particle size of 900 ? to 1000 ?, the core has a refractive index of 1.5355 to 1.5425, and the core-shell copolymer has a refractive index of 1.5415 to 1.5440.

Abstract: Disclosed is a graft copolymer, and a graft copolymer including a rubbery polymer, wherein the rubbery polymer includes a conjugated diene-based monomer unit and a soft domain, the graft copolymer includes an alkyl (meth)acrylate-based monomer unit, an aromatic vinyl-based monomer unit, and an alkali metal sulfonate-based monomer unit, the soft domain is formed by including a mineral-based oil, the mineral-based oil includes 70 wt % to 100 wt % of a mineral oil and 0 wt % to 30 wt % of a silicone-based oil, the mineral-based oil is included in 0.2 parts by weight to 0.5 parts by weight based on 100 parts by weight of the rubbery polymer, and the alkali metal sulfonate-based monomer unit is included in 0.8 wt % to 1.5 wt % based on the graft copolymer, a method for preparing the same, and a resin composition including the same.

Abstract: Disclosed is a graft copolymer, and a graft copolymer including a rubbery polymer, wherein the rubbery polymer includes a conjugated diene-based monomer unit, and one or more compound units selected from the group consisting of compounds represented by Formula 1, wherein the graft copolymer includes an alkyl (meth)acrylate-based monomer unit and an aromatic vinyl-based monomer unit, the content of the one or more compound units selected from the group consisting of the compounds represented by Formula 1 is from 0.1 wt % to 5.0 wt % with respect to the graft copolymer, the alkyl (meth)acrylate-based monomer unit is crosslinked from a crosslinking agent, and a weight average molecular weight of the aromatic vinyl-based monomer unit is from 20,000 g/mol to 100,000 g/mol. Also disclosed is a method for preparing a graft copolymer and a resin composition including same.

Abstract: Provided is a core-shell copolymer, and in particular, a core-shell copolymer including a core and a shell surrounding the core, wherein the core includes a conjugated diene monomer-derived repeating unit, an aromatic vinyl monomer-derived repeating unit, and an aromatic (meth)acrylate monomer-derived repeating unit, the shell includes an alkyl (meth)acrylate monomer-derived repeating unit, an aromatic vinyl monomer-derived repeating unit, and an aromatic (meth)acrylate monomer-derived repeating unit, the core has a particle size of 800 ? to 900 ?, the core-shell copolymer has a particle size of 900 ? to 1000 ?, the core has a refractive index of 1.5355 to 1.5425, and the core-shell copolymer has a refractive index of 1.5415 to 1.5440.

Abstract: A core-shell copolymer includes a core including an emulsifying initiator-derived layer derived from an emulsifying initiator, and a core forming monomer-derived repeating unit, bound to the emulsifying initiator-derived layer; and a shell including a shell forming monomer-derived repeating unit, wherein the emulsifying initiator comprising a surfactant part, an initiator part, and a vinyl monomer-derived repeating unit, the surfactant part including an organic acid-based monomer-derived repeating unit, and the initiator part including a peroxide-based monomer-derived repeating unit, wherein the emulsifying initiator has a weight average molecular weight less than 250,000 g/mol.

Abstract: A core-shell copolymer, a method of making the same, and a thermoplastic resin including the same are disclosed herein. In some embodiments, a core-shell copolymer including a core and a shell surrounding the core, wherein the core includes a first alkyl(meth)acrylate monomer-derived repeating unit having 1 to 8 carbon atoms and a terminal-modified polydimethylsiloxane crosslinking agent-derived crosslinking part wherein the terminal-modified polydimethylsiloxane crosslinking agent includes a second alkyl(meth)acrylate monomer-derived modified part at both terminals of the polydimethylsiloxane.

Abstract: A low-melting adhesive film may include a first adhesive layer made of a material comprising thermoplastic polyurethane, a second adhesive layer made of a material comprising aromatic-based hot-melt thermoplastic polyurethane capable of being applied to low temperature adhesion at a temperature of 60° C. or higher, and a polyethylene (PE)-based protective film layer. The low-melting adhesive film may be used to adhere a carpet fabric to a sound absorbing material and thus produce an integrated sound absorbing and proofing composite carpet.

Abstract: The present invention relates to an emulsifying initiator and, more specifically, provides: an emulsifying initiator comprising a surfactant part, an initiator part, and vinyl monomer-derived repeating unit, the surfactant part comprising an organic acid-based monomer-derived repeating unit, and the initiator part including a peroxide-based monomer-derived repeating unit; and a thermoplastic resin composition comprising the same.

Abstract: Provided is a developer cartridge attachable to and detachable from a main body of an image forming apparatus. The developer cartridge includes: a memory unit including a contact portion moved to a first position hidden inside the developer cartridge and a second position protruding outside the developer cartridge; an operating portion configured to move the contact portion to the first position and the second position; an outlet configured to discharge a developer; and a first shutter having an opening position and a closing position for opening and closing the outlet and moved to the closing position and the opening position when the contact portion is moved to the first position and the second position.

Abstract: Provided is a developer cartridge attachable to and detachable from a main body of an image forming apparatus. The developer cartridge includes: a memory unit including a contact portion moved to a first position hidden inside the developer cartridge and a second position protruding outside the developer cartridge; an operating portion configured to move the contact portion to the first position and the second position; an outlet configured to discharge a developer; and a first shutter having an opening position and a closing position for opening and closing the outlet and moved to the closing position and the opening position when the contact portion is moved to the first position and the second position.

Abstract: An electrophotographic image forming apparatus is provided including a body including an opening and a first coupler, a photoreceptor cartridge including a second coupler connected to the first coupler, a first gear connected to the second coupler, and a mounting portion, and attached to or detached from the body through the opening; and a development cartridge including a second gear connected to the first gear and attached or detached from the mounting portion through the opening while the photoreceptor cartridge is mounted in the body.

Abstract: An electrophotographic image forming apparatus is provided. The electrophotographic image forming apparatus includes a main body having an opening; a developing cartridge, detachably installed in the main body through the opening in a first direction, which includes a photosensitive drum and a cleaning member for removing a toner remaining in the photosensitive drum; and a toner recycle unit, detachably installed in the developing cartridge through the opening in the first direction, which recovers the toner removed by the cleaning member, filters the recovered toner, and supplies the toner again to the developing cartridge.

Abstract: An electrophotographic image forming apparatus is provided including a body including an opening, a photoreceptor cartridge attached to, or detached from, the body through the opening and including a mounting portion, a development cartridge attached to, or detached from, the mounting portion through the opening when the photoreceptor cartridge is mounted in the body, and a cover opening or closing the opening and fixing the development cartridge to the mounting portion by pressurizing the development cartridge while the opening is closed.

Abstract: A low-melting adhesive film may include a first adhesive layer made of a material comprising thermoplastic polyurethane, a second adhesive layer made of a material comprising aromatic-based hot-melt thermoplastic polyurethane capable of being applied to low temperature adhesion at a temperature of 60° C. or higher, and a polyethylene (PE)-based protective film layer. The low-melting adhesive film may be used to adhere a carpet fabric to a sound absorbing material and thus produce an integrated sound absorbing and proofing composite carpet.