摘要:
In an embodiment, a chemical mechanical polishing method for a substrate having a first layer and a stepped portion. A surface of the first layer is positioned above an upper face of the stepped portion. A polishing process for selectively removing the stepped portion is performed on the first layer by using a first slurry composition that has a self-stopping characteristic so that the first layer is changed into a second layer having a substantially flat surface. A second polishing process is performed using a second slurry composition that does not have the self-stopping characteristic, until the upper face of the stepped portion is exposed.
摘要:
Methods of forming non-volatile memory devices include the steps of forming a semiconductor substrate having first and second floating gate electrodes thereon and an electrically insulating region extending between the first and second floating gate electrodes. A step is then performed to etch back the electrically insulating region to expose upper corners of the first and second floating gate electrodes. Another etching step is then performed. This etching step includes exposing upper surfaces and the exposed upper corners of the first and second floating gate electrodes to an etchant that rounds the exposed upper corners of the first and second floating gate electrodes. The step of etching back the electrically insulating region includes etching back the electrically insulating region to expose sidewalls of the first and second floating gate electrodes having heights ranging from about 30 Å to about 200 Å. The step of exposing the upper corners of the first and second floating gate electrodes to an etchant is followed by the step of etching back the electrically insulating region to expose entire sidewalls of the first and second floating gate electrodes.
摘要:
For planarizing an IC (integrate circuit) material, a first slurry is dispensed for a first planarization of the IC material using the first slurry, and a second slurry is dispensed for a second planarization of the IC material using the second slurry. The first and second slurries are different. For example, the first slurry is silica based for faster planarization during the first planarization. Thereafter, the second planarization is performed with the second slurry that is ceria based with higher planarity for attaining sufficient planarization of the IC material.
摘要:
In an embodiment, a chemical mechanical polishing method for a substrate having a first layer and a stepped portion. A surface of the first layer is positioned above an upper face of the stepped portion. A polishing process for selectively removing the stepped portion is performed on the first layer by using a first slurry composition that has a self-stopping characteristic so that the first layer is changed into a second layer having a substantially flat surface. A second polishing process is performed using a second slurry composition that does not have the self-stopping characteristic, until the upper face of the stepped portion is exposed.
摘要:
Provided is a semiconductor device including a vertically oriented capacitor extending above the substrate surface and a method of manufacturing such devices in which cell, peripheral and boundary areas between the cell and peripheral areas are defined on a semiconductor substrate. Capacitors are formed in the cell area, a mold pattern is provided in the peripheral areas and an elongated dummy pattern is provided in the boundary areas. The dummy pattern includes a boundary opening in which a thin layer is formed on the elongated inner sidewalls and on the exposed portion of the substrate during formation of the lower electrode. A mold pattern and lower electrode structures having substantially the same height are then formed area so that subsequent insulation interlayer(s) exhibit a generally planar surface, i.e., have no significant step difference between the cell areas and the peripheral areas.
摘要:
Example embodiments of the present invention relate to an etching solution, a method of forming a pattern using the same, a method of manufacturing a multiple gate oxide layer using the same and a method of manufacturing a flash memory device using the same. Other example embodiments of the present invention relate to an etching solution having an etching selectivity between a polysilicon layer and an oxide layer, a method of forming a pattern using an etching solution using the same, a method of manufacturing a multiple gate oxide layer using the same, and a method of manufacturing a flash memory device using the same. An etching solution including hydrogen peroxide (H2O2) and ammonium hydroxide (NH4OH) by a volume ratio of about 1:2 to about 1:10 mixed in water. In a method of forming a pattern and methods of manufacturing a multiple gate oxide layer and a flash memory device, a polysilicon layer may be formed on a substrate. An insulation layer pattern including an opening exposing the polysilicon layer may be formed on the polysilicon layer. The polysilicon layer exposed by the insulation layer pattern may be etched using the etching solution. A polysilicon layer pattern may be formed on the substrate using the etching solution.
摘要:
Provided is a semiconductor device including a vertically oriented capacitor extending above the substrate surface and a method of manufacturing such devices in which cell, peripheral and boundary areas between the cell and peripheral areas are defined on a semiconductor substrate. Capacitors are formed in the cell area, a mold pattern is provided in the peripheral areas and an elongated dummy pattern is provided in the boundary areas. The dummy pattern includes a boundary opening in which a thin layer is formed on the elongated inner sidewalls and on the exposed portion of the substrate during formation of the lower electrode. A mold pattern and lower electrode structures having substantially the same height are then formed area so that subsequent insulation interlayer(s) exhibit a generally planar surface, i.e., have no significant step difference between the cell areas and the peripheral areas.
摘要:
A method of forming a capacitor can include forming a protective layer on a metal layer in a trench in an insulating layer and outside thereof. A surface of the protective layer and the metal layer beneath can be planarized using a chemical mechanical polishing (CMP) process to expose a surface of the insulating layer outside the trench. Related structures are also disclosed.
摘要:
A platen structure of a polishing apparatus for semiconductor wafer and a method for exchanging a polishing pad affixed to the same are provided in which the polishing pad supported by the platen is exchanged with convenience within a short time. The platen structure of the polishing apparatus in which the polishing pad attached to the platen of the polishing apparatus comprises a pad plate to which the polishing pad for polishing a wafer is attached, and a platen body combined with the pad plate and having at least one vacuum hole formed thereto to provide a vacuum passage.
摘要:
An apparatus for polishing a wafer is provided. The apparatus comprises a polishing pad for polishing the wafer. The polishing pad is divided into multiple portions that are rotated in a substantially same direction. At least one of the portions of the polishing pad is adapted to rotate at a speed different than the other portions. A driving unit is also provided for moving the polishing pad. A polishing head is employed for maintaining the side of the wafer to be polished engaged with the polishing pad, for contacting the polished surface of the wafer with the polishing pad, and for rotating the wafer.