摘要:
A method for producing a microelectronic structure is suggested in which a layer structure (30) which partially covers a substrate (5) and which comprises at least one first conductive layer (15,20) which reaches to a side wall (35) of the layer structure (30), is covered with a second conductive layer (45). The second conductive layer (45) is then subsequently back-etched to as great an extent as possible with an etching process with physical delamination, wherein delaminated material deposits on the side wall (35) of the layer structure (30). On the side wall (35) the delaminated material forms a protection layer (60) by means of which the first conductive layer (15,20) is to be protected from attack by oxygen to the furthest extent possible.
摘要:
For manufacturing a capacitor, in particular for a dynamic memory cell arrangement, a trench is etched in a substrate. In the trench, a layer sequence is produced that contains, in alternating fashion, layers of doped silicon and germanium-containing layers. By anisotropic etching, the surface of the semiconductor substrate (12) is exposed in the region of the trench floor. The trenches are filled with a conductive support structure (20). The germanium-containing layers are removed selectively to the layers of doped silicon. The exposed surface of the layers of doped silicon (17) and of the support structure (20) are provided with a capacitor dielectric (22), onto which is applied a counter-electrode (23).
摘要:
A self-supporting layer of n-doped monocrystalline silicon is stripped from a substrate wafer of n-doped, monocrystalline silicon by electrochemical etching for manufacturing a solar cell. Holes are formed in the substrate wafer by electrochemical etching, particularly in a fluoride-containing, acidic electrolyte wherein the substrate wafer is connected as an anode. When a depth of the holes that essentially corresponds to the thickness of the self-supporting layer is reached, the process parameters of the etching are modified such that the self-supporting layer is stripped as a consequence of the holes growing together. The solar cell is manufactured from the self-supporting layer, and the method can be applied repeatedly on the same substrate wafer for stripping a plurality of self-supporting layers.
摘要:
For manufacturing an electrically conductive tip composed of a doped semiconductor material, a mask layer is produced on a substrate composed of the semiconductor material. This mask layer contains a material at least at its surface and directly on the substrate whereon the semiconductor material does not grow in a selective epitaxy. An opening wherein the surface of the substrate lies exposed is produced in the mask layer. The electrically conductive tip is produced by a selective epitaxy on the exposed surface of the substrate such that the layer growth in the direction parallel to the surface of the substrate is lower than in the direction perpendicular to the surface of the substrate.
摘要:
For manufacturing a component with porous silicon, two highly doped regions with a lightly doped region arranged between them are formed in a silicon wafer. The dopant concentrations are thereby set such that porous silicon arises in the lightly doped region in a subsequent anodic etching. Light-emitting diodes or light-controlled bipolar transistors can be manufactured in this way.
摘要:
Rod-shaped or cylindrical structures in the nm range on a substrate of silicon are manufactured. A first cylinder of silicon is selectively epitaxially deposited in the hole of a mask layer of oxide, and the mask layer is removed. The silicon is then oxidized to form an oxide layer having such a thickness that a thinner, second cylinder of silicon having practically the same height as the first cylinder remains. In a last step, this oxide layer is removed, so that the second cylinder forms a freestanding silicon rod on the surface of the substrate.
摘要:
A memory cell configuration in a semiconductor substrate is proposed, in which the semiconductor substrate is of the first conductivity type. Trenches which run parallel to one another are incorporated in the semiconductor substrate, and first address lines run along the side walls of the trenches. Second address lines are formed on the semiconductor substrate, transversely with respect to the trenches. Semiconductor substrate regions, in which a diode and a dielectric whose conductivity can be changed are arranged, are located between the first address lines and the second address lines. A suitable current pulse can be used to produce a breakdown in the dielectric, with information thus being stored in the dielectric.
摘要:
A method for fabricating a dopant region is disclosed. The dopant region is formed by providing a semiconductor substrate that has a surface. An electrically insulating intermediate layer is applied to the surface. A doped semiconductor layer is then applied to the electrically insulating intermediate layer, the semiconductor layer being of a first conductivity type and contains a dopant of the first conductivity type. A temperature treatment of the semiconductor substrate at a predefined diffusion temperature is performed, so that the dopant diffuses partially out of the semiconductor layer through the intermediate layer into the semiconductor substrate and forms there a dopant region of the first conductivity type. The electrical conductivity of the intermediate layer is modified, so that an electrical contact between the semiconductor substrate and the semiconductor layer is produced through the intermediate layer.
摘要:
In producing a silicon capacitor, hole structures (2) are created in a silicon substrate (1), at the surface of which structures a conductive zone (3) is created by doping and whose surface is provided with a dielectric layer (4) and a conductive layer (5), without filling the hole structures (2). To compensate mechanical strains upon the silicon substrate (1) which are effected by the doping of the conductive zone (3), a conformal auxiliary layer (6) is formed on the surface of the conductive layer (5), which auxiliary layer is under a compressive mechanical stress.
摘要:
A reactor configuration contains a housing connected to a silicon wafer. The silicon wafer has pores extending from a first main area of the silicon wafer into an interior of the silicon wafer, preferably as far as a second main area of the silicon wafer. A catalyst layer at least partly covers the surface of the pores.