摘要:
Trench isolation methods for integrated circuits may reduce irregularities in the formation of an isolation layer through use of a high selectivity chemical-mechanical polishing (CMP) operation. In particular, a substrate surface is etched to form a trench. An insulation layer is then formed on the substrate surface and in the trench. The insulation layer is chemical-mechanical polished using a slurry that includes a CeO2 group abrasive to form an isolation layer in the trench. The CMP selectivity ratio of a slurry that includes a CeO2 group abrasive may be sufficient to allow the substrate surface to be used as a CMP stop. As a result, a more consistent level of polishing may be maintained over the substrate surface, which may result in a more uniform thickness in the isolation layer.
摘要:
In a reliable semiconductor device and a method of fabricating the semiconductor device, a difference in height between upper surfaces of a cell region and a peripheral region (also referred to as a level difference) is minimized by optimizing dummy gate parts. The semiconductor device includes a semiconductor substrate including a cell region and a peripheral region surrounding the cell region, a plurality of dummy active regions surrounded by a device isolating region and formed apart from each other, and a plurality of dummy gate parts formed on the dummy active regions and on the device isolating regions located between the dummy active regions, wherein each of the dummy gate parts covers two or more of the dummy active regions.
摘要:
Disclosed is a method of fabricating a semiconductor device including a multi-gate transistor. The method of fabricating a semiconductor device includes providing a semiconductor device having a number of active patterns which extend in a first direction, are separated by an isolation layer, and covered with a first insulating layer; forming a first groove by etching the isolation layer located between the active patterns adjacent to each other in the first direction; burying the first groove with a passivation layer; forming a second groove exposing at least a portion of both sides of the active patterns by etching the isolation layer located between the active patterns in a second direction intersecting the first direction; removing the passivation layer in the first groove; and forming a gate line filling at least a portion of the second groove and extending in the second direction.
摘要:
A multi-level transistor comprising a second active region having a single-crystalline characteristic and a method for manufacturing the multi-level transistor are disclosed. The multi-level transistor comprises a substrate comprising a first active region, a first transistor formed on the first active region, a first insulating layer covering the first transistor, and adapted to isolate the first active region, a second active region comprising a patterned first selective epitaxial growth (SEG) layer formed on the first insulating layer, and a second transistor formed on the second active region.
摘要:
A wet-etch composition may include: peracetic acid (PAA); and a fluorinated acid; a relative amount of the PAA in the composition being sufficient to ensure an etch rate of (P-doped-SiGe):(P-doped-Si) that is substantially the same as an etch rate of (N-doped-SiGe):(N-doped-Si). Such a wet-etch composition is hereafter referred to as a PAA-based etchant and can be used to make, e.g., a CMOS MBCFET, an electrode of a capacitor, etc.
摘要:
A slurry composition useful for chemical mechanical polishing of the surface of a material layer, e.g., a silicon oxide layer, is disclosed. A first material surface which is exposed to the slurry exhibits hydrophilicity, while a second material layer, e.g., a polysilicon layer, the surface of which is also exposed to the slurry, exhibits hydrophobicity, and accordingly acts as a polishing stopping layer. The slurry composition consists essentially of water, abrasive grains, and a polymer additive having both hydrophilic and hydrophobic functional groups.
摘要:
A method for fabricating a MOS transistor using a selective silicide process wherein a gate insulating layer and a gate polysilicon layer are sequentially formed on a silicon substrate, and a gate spacer is formed on a side wall of the gate insulating layer and the gate polysilicon layer. Impurity ions are implanted and diffused using the gate spacer and the gate polysilicon layer as a mask layer to form a source/drain region in the substrate. An etching blocking layer is formed to cover the source/drain region, the gate spacer, and the gate polysilicon layer, and then, a dielectric layer to cover the etching blocking layer is formed. The dielectric layer is planarized, and the etching blocking layer on the gate polysilicon layer is exposed. The exposed etching blocking layer and a part of the gate spacer are etched, and a top surface and a top side of the gate polysilicon layer are exposed. A silicide layer is formed over the exposed part of the gate polysilicon layer.
摘要:
A chemical mechanical polishing (CMP) method using a double polishing stopper by which it is possible to prevent a dishing phenomenon and a variation in the thickness of a polishing stopper, including the steps of stacking polishing stoppers to form the double polishing stopper on a semiconductor substrate, forming a trench, stacking an isolation layer, performing a first CMP process using a second polishing stopper, removing the second polishing stopper, and performing a second CMP process using a first polishing stopper. It is possible to remove the second polishing stopper by additionally interposing an etching stopper between the polishing stoppers which form the double polishing stopper.
摘要:
A wire forming method for a semiconductor device includes the steps of depositing an insulation material on a semiconductor substrate and patterning the insulation material to form a first insulation layer, forming a lower capping layer on the first insulation layer, etching the lower capping layer and the first insulation layer to form a first contact hole that exposes a first part of the semiconductor substrate, forming a wire layer over the capping layer and the first part of the semiconductor substrate, performing a chemical and mechanical polishing (CMP) process with respect to the wire layer and the lower capping layer to expose the first insulation layer, forming a second insulation layer over the wire layer and the first insulation layer, and etching the first and second insulation layers to form a second contact hole that exposes a second part of the semiconductor substrate. The wire forming method can prevent the lifting of the wire layer, the splitting of the lower insulation layer, and the formation of a protrusion n the second contact hole.
摘要:
A photo key has a plurality of first regions spaced apart from one another on a semiconductor substrate, and a second region surrounding the first regions, and one of the first regions and the second region constitutes a plurality of photo key regions spaced apart from one another. Each of the photo key regions includes a plurality of first conductive patterns spaced apart from one another; and a plurality of second conductive patterns interposed between the first conductive patterns.