Abstract:
PURPOSE: A method for forming a ferroelectric thin film and a semiconductor device manufacturing method using the same are provided to flatten only rough portion of the ferroelectric thin film while suppressing the abrasion of bulk portion of the ferroelectric thin film by using slurry composition. CONSTITUTION: A conductive structure is formed on a substrate(S110). A pre ferroelectric film is formed on the conductive structure(S120). The surface of the pre ferroelectric film is chemically-mechanically polished using slurry composition(S130). A ferroelectric film with improved surface roughness is washed(S140). The ferroelectric film is heat-treated to cure the damage of the film surface(S150).
Abstract:
A semiconductor memory device includes a first conductive line on a semiconductor substrate, an interlayer insulating layer on the first conductive line, a second conductive line on the interlayer insulating layer, and a memory cell in an hole through the interlayer insulating layer wherein the first and second conductive lines cross, the memory cell including a discrete resistive memory material region disposed in the hole and electrically connected between the first and second conductive lines. The resistive memory material region may be substantially contained within the hole. In some embodiments, contact between the resistive memory material region and the interlayer insulating layer is substantially limited to sidewalls of the interlayer insulating layer in the hole.
Abstract:
A method for manufacturing a semiconductor device with tapered patterns is provided to form columnar patterns on a surface of a donor wafer by using a bonding process and a cleaving process. An acceptor wafer and a donor wafer(200') are prepared. The acceptor wafer includes a first pattern and a second pattern made of the material different from the first pattern. The donor wafer includes the hydrogen ion implantation region. The respective first and second bonding areas are formed in the hydrogen ion implantation region of the donor wafer corresponding to the first and second patterns of the acceptor wafer by bonding the accepter wafer and the donor wafer. The bonding strength of the first bonding area is greater than the second bonding area. The first bonding area is separated from the donor wafer by separating the acceptor wafer and the donor wafer. The second bonding area is exposed while being adhered to the donor wafer and is protruded from the donor wafer. The exposed second bonding area is etched and the tapered pattern is formed in the donor wafer.
Abstract:
A method for forming a single crystal silicon pattern in a stacked semiconductor device is provided to simplify a pattern forming process by forming the single crystal silicon pattern without using a photolithography process. A hydrogen ion is implanted on an upper surface of a first substrate(100), which is made of a single crystal silicon, such that a hydrogen ion implantation region(102) is formed at a portion displaced from the upper surface of the first substrate. A silicon oxide film pattern is formed to cover the second substrate on a second substrate, which is made of a single crystal signal. An upper surface of the silicon oxide film pattern is partially protruded. The upper surface of the silicon oxide film pattern, which is formed on the second substrate, is bonded with the upper surface of the first substrate. A portion of the first substrate is separated from the second substrate by using the hydrogen ion implantation region as a cutting surface. A single crystal silicon pattern is selectively formed on the silicon oxide pattern.
Abstract:
A method for fabricating a semiconductor device is provided to minimize a dishing phenomenon at a planarization process for a crystalline semiconductor layer formed in a peripheral region and/or a test device group region. A pattern having trenches(203a,203b) is formed on a semiconductor substrate(200) to expose the substrate, and then a semiconductor layer is formed to bury the trenches. The semiconductor layer is primarily planarized when the pattern is not exposed. A crystalline semiconductor layer is formed on the primarily planarized semiconductor layer by performing an epitaxial growth process. The crystalline semiconductor layer is secondarily planarized to form a crystalline semiconductor pattern. The substrate has a first region and a second region wider than the first region.
Abstract:
A method for fabricating a ferroelectric layer and a method for manufacturing a semiconductor device using the same are provided to realize a thin ferroelectric layer and to improve degradation thereof by employing a CMP process for polishing a surface of a preliminary ferroelectric layer. A preliminary ferroelectric layer is formed on a substrate(100). The preliminary ferroelectric layer has a thickness of 500 to 1500Š. The preliminary ferroelectric layer is selected from a group consisting of PZT[Pb(Zr,Ti)O3], SBT(SrBi2Ta2O9), BLT[Bi(La,Ti)O3], PLZT[Pb(La,Zr)TiO3], and BST[Bi(Sr,Ti)O 3]. A surface of the preliminary ferroelectric layer is polished to form a ferroelectric layer(115) on the substrate. The ferroelectric layer is cured. The ferroelectric layer has a thickness of 200 to 1000 Š.