摘要:
An oxide etching recipe including a heavy hydrogen-free fluorocarbon having F/C ratios less than 2, preferably C4F6, an oxygen-containing gas such as O2 or CO, a lighter fluorocarbon or hydrofluorocarbon, and a noble diluent gas such as Ar or Xe. The amounts of the first three gases are chosen such that the ratio (F—H)/(C—O) is at least 1.5 and no more than 2. Alternatively, the gas mixture may include the heavy fluorocarbon, carbon tetrafluoride, and the diluent with the ratio of the first two chosen such the ratio F/C is between 1.5 and 2.
摘要:
A method of etching silicon oxide with high selectivity to a photoresist mask and to a silicon-containing substrate comprising exposing the silicon oxide to a plasma of a precursor etch gas of a fluorocarbon and an organic silane containing at least one organic group. When at least about 10% by weight of the silane is present in the etch gas, the selectivity between the silicon oxide and the photoresist mask layer, and between the silicon oxide and the silicon-containing substrate, increases markedly. High aspect ratio, submicron size openings can be etched.
摘要:
According to this invention, there is provided a method of repairing a bump defect of a structure obtained by forming a predetermined pattern on a substrate, having the steps of forming a first thin film consisting of a material different from that of the substrate on the substrate around the bump defect or close to the bump defect, forming a second thin film on the bump defect and the first thin film to flatten an upper surface of the second thin film, performing simultaneous removal of the bump defect and the thin films on an upper portion of the projecting defect and around the bump defect using a charged particle beam, and performing removal of the thin films left in the step of performing simultaneous removal. According to this invention, there is provided to a method of repairing a divot defect of a structure obtained by forming a predetermined pattern on a substrate, having the steps of burying a material in the divot defect and forming a projecting portion projecting from a substrate surface, covering a region including the projecting portion with flattening films consisting of a material different from that of the substrate to flatten an upper surface of the region, performing simultaneous removal of the projecting portion and the flattening films around the projecting portion using a charged particle beam, and performing removal of the flattening films left in the step of performing simultaneous removal.
摘要:
A method for manufacturing an exposure mask provided with a substrate for transmitting an exposure light and with phase shifters arranged at prescribed intervals on the substrate for shifting the phase of the exposure light transmitted through the substrate by a half wavelength as compared with the phase of the exposure light transmitted through both the substrate and an opening between the phase shifters consists of the steps of preparing a solution containing a phase shifter material, arranging resist layers at the prescribed intervals on the substrate, immersing the substrate with the resist layers in the solution, forming the phase shifters on the substrate between the resist layers by a prescribed thickness by depositing the material of the phase shifter from the solution, and removing the resist layers from the substrate to form the openings.
摘要:
A dry-etching method comprising the steps of forming carbon film on a substrate to be etched, forming a resist pattern on said carbon thin film, selectively etching said carbon film using said resist pattern as a mask by a plasma of a gas mixture of a gas containing fluorine atoms and a gas containing oxygen atoms which are mixed at an atomic ratio of fluorine to oxygen of 198:1 to 1:2 so as to form a carbon film pattern, and selectively etching said substrate to be etched using said carbon film pattern as a mask or said resist pattern and said carbon film pattern as masks.
摘要:
According to this invention, there is provided a method of repairing a bump defect of a structure obtained by forming a predetermined pattern on a substrate, having the steps of forming a first thin film consisting of a material different from that of the substrate on the substrate around the bump defect or close to the bump defect, forming a second thin film on the bump defect and the first thin film to flatten an upper surface of the second thin film, performing simultaneous removal of the bump defect and the thin films on an upper portion of the projecting defect and around the bump defect using a charged particle beam, and performing removal of the thin films left in the step of performing simultaneous removal.
摘要:
A magnetron plasma etching apparatus comprises a chamber and a mount for supporting a substrate. A high-potential electrode connected to an RF power source is connected to the mount, and a low-potential electrode which is grounded is connected to the chamber. A rotary magnet is provided above the chamber, thereby generating a rotary magnetic field intersecting at right angles an electric field generated by both electrodes. An end-point detecting member for detecting an end-point of etching of the substrate is provided at the side of the chamber. The end-point detecting member collects mainly the light at a region near the rotation center of the magnetic field. That light component of a spectrum, which varies greatly with the progress of the etching, is extracted from the collected light, and the intensity of the light of this spectrum is converted to a first electric signal. The intensity of the collected light is converted to a second electric signal. The end-point detecting means calculates a ratio of the first and second electric signals, and the end-point of the etching is detected on the basis of the ratio.
摘要:
A magnetic field generator which provides greater control over the magnetic field is provided. The magnetic field generator has a plurality of overlapping main magnetic coil sections for forming a magnetic field generally parallel to the top surface of the supporting member. In other embodiments, sub-magnetic coil sections are placed symmetrically around the main magnetic coil sections.
摘要:
A method for fabricating a semiconductor mask is described. A semiconductor stack having a sacrificial mask comprised of a series of lines is first provided. A spacer mask having spacer lines adjacent to the sidewalls of the series of lines of the sacrificial mask is then formed. The spacer mask also has interposed lines between the spacer lines. Finally, the sacrificial mask is removed to provide only the spacer mask. The spacer mask having interposed lines triples the frequency of the series of lines of the sacrificial mask.
摘要:
A magnetic field generator which provides greater control over the magnetic field is provided. The magnetic field generator has a plurality of overlapping main magnetic coil sections for forming a magnetic field generally parallel to the top surface of the supporting member. In other embodiments, sub-magnetic coil sections are placed symmetrically around the main magnetic coil sections.