摘要:
Provided is a method of fabricating a shallow trench isolation (STI) structure having a high aspect ratio and improved insulating properties. The exemplary method includes filling a shallow trench isolation region opening with an undoped polysilicon layer, removing an upper portion of the undoped polysilicon layer to form a second opening having a reduced aspect ratio relative to the original opening and filling the second opening with an insulating material to complete the STI structure. Additional protective layers including silicon oxide, silicon nitride and/or a capping layer may be provided on the sidewalls of the opening before depositing the undoped polysilicon.
摘要:
A wafer having a dielectric layer and an electrode partially protruding from the top surface of the dielectric layer is provided. The dielectric layer is etched with a chemical solution such as LAL. Prior to etching, the protruding portion of the electrode is removed or reduced to prevent any bubbles included in the chemical solution from adhering to the electrode. Thus, the chemical solution can etch the dielectric layers without being blocked by any bubbles included in a chemical solution.
摘要:
A wafer having a dielectric layer and an electrode partially protruding from the top surface of the dielectric layer is provided. The dielectric layer is etched with a chemical solution such as LAL. Prior to etching, the protruding portion of the electrode is removed or reduced to prevent any bubbles included in the chemical solution from adhering to the electrode. Thus, the chemical solution can etch the dielectric layers without being blocked by any bubbles included in a chemical solution.
摘要:
A wafer having a dielectric layer and an electrode partially protruding from the top surface of the dielectric layer is provided. An etchant or chemical solution is applied to the dielectric layer and bubbles in the etchant are prevented from adhering to the electrode. In one embodiment, prior to etching, the protruding portion is covered with a buffer layer to prevent bubbles in the etchant from adhering to the electrode. Thus, the etchant can etch the dielectric layers without being blocked by bubbles included therein.
摘要:
Provided herein are methods for using corrosion-inhibiting cleaning compositions for semiconductor wafer processing that include an aqueous admixture of at least water, a surfactant and a corrosion-inhibiting compound selected from a group consisting of amino phosphonates, polyamines and polycarboxylic acids. The quantity of the corrosion-inhibiting compound in the admixture is preferably in a range from about 0.0001 wt % to about 0.1 wt % and the quantity of the surfactant is preferably in a range from about 0.001 wt % to about 1.0 wt %. The aqueous admixture may also include sulfuric acid and a fluoride, which act as oxide etchants, and a peroxide, which acts as a metal etchant.
摘要:
After a silicidation blocking pattern is formed on a substrate including silicon, the silicidation blocking pattern is hardened by a thermal annealing process. The substrate is rinsed to remove a native oxide film formed on the substrate, and then a silicide film is formed on a portion of the substrate exposed by the silicidation blocking pattern. The silicide film can thus be formed in an exact portion of the substrate, and the substrate is not damaged during rinsing.
摘要:
A corrosion-inhibiting cleaning composition for semiconductor wafer processing includes an aqueous admixture of at least water, a surfactant and a corrosion-inhibiting compound selected from a group consisting of amino phosphonates, polyamines and polycarboxylic acids. The quantity of the corrosion-inhibiting compound in the admixture is preferably in a range from about 0.0001 wt % to about 0.1 wt % and the quantity of the surfactant is preferably in a range from about 0.001 wt % to about 1.0 wt %. The aqueous admixture may also include sulfuric acid and a fluoride, which act as oxide etchants, and a peroxide, which acts as a metal etchant.
摘要:
Cleaning solutions for integrated circuit devices and methods of cleaning integrated circuit devices using the same are disclosed. The cleaning solution includes about 30% aqueous ammonia solution, acetic acid by a volume percent higher then a volume percent of the aqueous ammonia solution, and deionized water by a volume percent higher then the volume percent of the acetic acid. Additionally, disclosed are methods wherein the cleaning solution is formed on integrated circuit substrates having an exposed metal pattern formed thereon, and further providing mega-sonic energy to the film of the cleaning solution.
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:
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.