摘要:
A circulation system for supplying one or more chemicals, or mixtures thereof, includes a chemical tank containing the chemical. A chemical supply line is connected at one end to the chemical tank, through which the chemical from the chemical tank is supplied to one of a processing section, for performing a specific semiconductor device fabrication process, and a bypass section, for collecting the chemical while the processing section is idle. A supply nozzle, connected to another end of the chemical supply line, is movable between the processing section and the bypass section, such that the supply nozzle is selectively oriented above one of the processing section and the bypass section. A primary chemical re-circulation line connects the processing section and the chemical tank, and a chemical bypass line connects the bypass section and a portion of the primary chemical re-circulation line.
摘要:
A semiconductor wafer cleaning apparatus and method uses only one inner bath for chemical solution and de-ionized water cleaning, and includes a marangoni dryer for cleaning and drying semiconductor wafers. The apparatus includes a loading unit loaded with a cassette holding wafers; a moving mechanism for extracting the wafers from the cassette and moving the wafers into a loader; an inner bath for cleaning the wafers with a chemical solution or de-ionized water; a marangoni dryer including a hood, for moving the wafers from the loader into the bath, to be sealed to the bath; and a knife for supporting the wafers loaded into the bath at a lower portion thereof and moving the wafers up and down. Since the marangoni dryer is adhered to the bath during drying, the wafers are not affected by laminar flow or exhaustion and water marks do not occur thereon.
摘要:
There is provided a wet-etching facility for manufacturing semiconductor devices, wherein the etching process is performed for a wafer with its used surface facing downward so that the by-products from the etching process are completely removed from the etching groove of the wafer by gravity, and the impurities on the back side of the wafer are sank down, and are not touched to the used surface of the other wafer thereby producing good quality of wafers. The wet-etching facility for manufacturing semiconductor devices comprises a bath containing an amount of chemical; a chemical supply part for supplying an amount of chemical to the bath; a chemical discharge part for discharging the chemical inside the bath to the outside; a wafer guide holding and fixing a wafer with its used surface facing downward, and placing the wafer into a chemical; a transfer robot for loading and unloading the wafer into the wafer guide; and a chemical spray part for spraying the chemical at a high pressure such that the chemical flows along a surface of the wafer.
摘要:
A wet etching device used in manufacturing a semiconductor device includes a power source, a transmission device for transmitting power from the power source, and a roller for reversing top and bottom positions of a wafer placed in a processing bath using power from the power source transmitted by the transmission device. Here, the initial top and bottom positions of the wafer during loading are reversed before unloading. Accordingly, the entire surface of the wafer spends an equal amount of time in the processing bath containing a chemical solution and can thus be etched uniformly.
摘要:
A gate is formed on a device formation region of a semiconductor substrate, and source and drain regions are formed in the device formation region of the semiconductor substrate adjacent respective sides of the gate. The gate is formed to include a gate dielectric layer, a gate conductive layer and sidewall spacers located at respective sidewalls of the gate conductive layer. An etch stop layer is formed over the source region, the drain region and the sidewall spacers of the gate to obtain an intermediate structure, and a planarized first interlayer insulating film is formed over a surface of the intermediate structure. The first insulating layer is dry etched until the etch stop layer over the source region, the drain region and the sidewall spacers is exposed to form self-aligned contact holes in the first interlayer insulating over the source region and the drain region, respectively. The etch stop layer is then wet etched to remove the etch stop layer over the source region, the drain region and the sidewall spacers, and respective contact pads are formed by filling the self-aligned contact holes with conductive polysilicon.
摘要:
A wet station apparatus used for cleaning and wet etching a semiconductor wafer includes a chemical container for holding a chemical solution, a temperature measuring device for measuring a temperature of the chemical solution, a temperature control unit for comparing the temperature measured by the temperature measuring device with a predetermined reference temperature value, and outputting the result as a control signal, a quartz heater for heating the chemical solution, a power supply controller for receiving the control signal and adjusting the power supplied to the quartz heater, and a power switch connected to the power supply controller, for receiving a heating initiation signal and switching power to the quartz heater, wherein a heater monitoring system is further provided for monitoring the operating states of the quartz heater and the power supply controller and notifying an operator of any problems.
摘要:
Aqueous cleaning compositions comprise from about 0.01 to about 10 weight percent of hydrogen fluoride; from about 1 to about 10 weight percent of hydrogen peroxide; and from about 0.01 to about 30 weight percent of isopropyl alcohol. Methods of manufacturing microelectronic devices comprise providing electrodes on insulation films on microelectronic substrates; etching the insulation films using the electrodes as etching masks to form an exposed surfaces on the electrodes; cleaning the exposed surfaces with aqueous cleaning compositions comprising from about 0.01 to about 10 weight percent of hydrogen fluoride; from about 1 to about 10 weight percent of hydrogen peroxide; and from about 0.01 to about 30 weight percent of isopropyl alcohol; and forming dielectric films on the exposed surfaces of the electrodes. The cleaning step and the etching step are carried out simultaneously.
摘要:
A wafer cassette through which a sonic wave is evenly transferred to a substrate in a quartz bath, and a cleaning system adopting the wafer cassette are provided. In the wafer cassette, a hole for evenly transferring the sonic wave to the substrate is formed. The cleaning system includes a vibration plate for generating a sonic wave, placed at the lowest portion of the cleaning system, a sink placed on the vibration plate, a quartz bath placed in the sink and spaced from the bottom of the sink, in which a wafer cassette is placed, a plurality of water supplies for supplying a cleaning solution, placed in the bottom of the quartz bath and a water drain for draining the cleaning solution overflown from the quartz bath, placed on the bottom of the sink, opposite to the water supplies, wherein the vibration plate is placed between the water drain and the water supplies. As a result, the oscillation frequency does not deviate from the setting value and air bubbles are not formed at the lower portion of the quartz bath, so that the irregular reflection of the sonic wave is restricted. Thus, the sonic wave is evenly transferred to the wafer, thereby enhancing the capability of removing the particles from the substrate.
摘要:
A wet station apparatus used for cleaning and wet etching a semiconductor wafer includes a chemical container for holding a chemical solution, a temperature measuring device for measuring a temperature of the chemical solution, a temperature control unit for comparing the temperature measured by the temperature measuring device with a predetermined reference temperature value, and outputting the result as a control signal, a quartz heater for heating the chemical solution, a power supply controller for receiving the control signal and adjusting the power supplied to the quartz heater, and a power switch connected to the power supply controller, for receiving a heating initiation signal and switching power to the quartz heater, wherein a heater monitoring system is further provided for monitoring the operating states of the quartz heater and the power supply controller and notifying an operator of any problems.