摘要:
Treatment of a semiconductor wafer employs: a) position-dependent measuring of a parameter characterizing the semiconductor wafer to determine a position-dependent value of the parameter over an entire surface of the semiconductor wafer, b) oxidizing the entire surface of the semiconductor wafer under the action of an oxidizing agent with simultaneous exposure of the entire surface, the oxidation rate and thus the thickness of the resulting oxide layer dependent on the light intensity at the surface of the semiconductor wafer, and c) removing of the oxide layer, the light intensity in step b) predefined in a position-dependent manner such that differences in the position-dependent values of the parameter measured are reduced by the position-dependent oxidation rate resulting in step b) and subsequent removal of the oxide layer in step c).
摘要:
Semiconductor wafers are cleaned using a cleaning solution containing an alkaline ammonium component in an initial composition, wherein the semiconductor wafer is brought into contact with the cleaning solution in an individual-wafer treatment, and in the course of cleaning hydrogen fluoride is added as further component to the cleaning solution, and the cleaning solution has at the end of cleaning, a composition that differs from the initial composition.
摘要:
Semiconductor wafers are cleaned, dried, and hydrophilized the following steps in the order stated: a) treating the semiconductor wafer with a liquid aqueous solution containing hydrogen fluoride, the semiconductor wafer rotating about its center axis at least occasionally, and b) drying the semiconductor wafer by rotation of the semiconductor wafer about its center axis at a rotational speed of 1000 to 5000 revolutions per minute in an ozone-containing atmosphere, the liquid aqueous solution containing hydrogen fluoride flowing away from the semiconductor wafer on account of the centrifugal force generated by the rotation, and the surface of the semiconductor wafer being hydrophilized by ozone.
摘要:
A method for the wet-chemical treatment of a semiconductor wafer involves: a) rotating a semiconductor wafer; b) applying a cleaning liquid comprising gas bubbles having a diameter of 100 μm or less to the rotating wafer such that a liquid film forms on the wafer; c) exposing the rotating semiconductor wafer to a gas atmosphere containing a reactive gas; and d) removing the liquid film from the wafer.
摘要:
To reduce and homogenize the thickness of a semiconductor layer which lies on the surface of an electrically insulating material, the surface of the semiconductor layer is exposed to the action of an etchant whose redox potential is adjusted as a function of the material and the desired final thickness of the semiconductor layer, so that the material erosion per unit time on the surface of the semiconductor layer due to the etchant becomes less as the thickness of the semiconductor layer decreases, and is only from 0 to 10% of the thickness per second when the desired thickness is reached. The method is carried out without the action of light or the application of an external electrical voltage.
摘要:
A layer structure comprising a smoothed interlayer and an overlying layer applied on the interlayer, wherein the interlayer is treated with a gaseous etchant containing hydrogen fluoride, a material removal being obtained thereby and the interlayer being smoothed.
摘要:
Semiconductor wafers are treated in a liquid container filled at least partly with a solution containing hydrogen fluoride, such that surface oxide dissolves, are transported out of the solution along a transport direction and dried, and are then treated with an ozone-containing gas to oxidize the surface of the semiconductor wafer, wherein part of the semiconductor wafer surface comes into contact with the ozone-containing gas while another part of the surface is still in contact with the solution, and wherein the solution and the ozone-containing gas are spatially separated such that they do not come into contact with one another.
摘要:
A method for the wet-chemical treatment of a semiconductor wafer involves: a) rotating a semiconductor wafer; b) applying a cleaning liquid comprising gas bubbles having a diameter of 100 μm or less to the rotating wafer such that a liquid film forms on the wafer; c) exposing the rotating semiconductor wafer to a gas atmosphere containing a reactive gas; and d) removing the liquid film from the wafer.
摘要:
Semiconductor wafers are cleaned, dried, and hydrophilized the following steps in the order stated: a) treating the semiconductor wafer with a liquid aqueous solution containing hydrogen fluoride, the semiconductor wafer rotating about its center axis at least occasionally, and b) drying the semiconductor wafer by rotation of the semiconductor wafer about its center axis at a rotational speed of 1000 to 5000 revolutions per minute in an ozone-containing atmosphere, the liquid aqueous solution containing hydrogen fluoride flowing away from the semiconductor wafer on account of the centrifugal force generated by the rotation, and the surface of the semiconductor wafer being hydrophilized by ozone.
摘要:
Semiconductor wafers are cut from a crystal and subjected to a series of processing steps in which material is removed from a front side and a rear side of the semiconductor wafers, comprising the following processing steps: a mechanical processing step, an etching step in which the semiconductor wafers are oxidized and material is removed from the front side of the wafers with the aid of a gaseous etchant containing hydrofluoric acid at a temperature of 20 to 70° C., and a polishing step in which the front side of the semiconductor wafer is polished, the processing steps in which the front side of the semiconductor wafer is polished causing material removal which does not amount to more than 5 μm in total.