Abstract:
Process for structuring ceramic layers on semiconductor substrates comprises depositing a ceramic layer on a semiconductor substrate, sealing the deposited ceramic layer, forming impurity sites in sections, and treating the ceramic layer with an etching medium, in which the ceramic layer is removed from the substrate in the sections provided with the impurity sites.
Abstract:
Process for structuring ceramic layers on semiconductor substrates comprises depositing a ceramic layer on a semiconductor substrate, sealing the deposited ceramic layer, forming impurity sites in sections, and treating the ceramic layer with an etching medium, in which the ceramic layer is removed from the substrate in the sections provided with the impurity sites.
Abstract:
PROBLEM TO BE SOLVED: To avoid the inefficient excessive saturation of heated demineralized water with gas by adjusting the gas concentration in the demineralized water before the water is heated to a selective cleaning temperature for cleaning a semiconductor wafer under ultrasonic vibrating actions. SOLUTION: The gas space in a degassing chamber 11 is maintained at a selective negative pressure by operating a vacuum pump 16 in connection with a pressure sensor 18. Then the pressure in the chamber 11 is adjusted by releasing a selective amount of nitrogen gas from the water in the water space of the chamber 11 to the gas space of the chamber 11 through a chamber thin film, and removing the gas by sucking and exhaling the gas through a gas discharge pipe 17. In addition, the demineralized water in a heating vessel 12 is selectively warmed by means of a controller 21 and supplied to a cleaning tank 13 for ultrasonically cleaning a semiconductor wafer.
Abstract:
PROBLEM TO BE SOLVED: To provide a method for forming the pair of MOSFETs in different insulation regions of a silicon substrate. SOLUTION: The first layer of a silicon dioxide is grown on the surface of a silicon substrate, an inorganic layer is formed on a silicon dioxide layer and a photoresist layer is formed on the inorganic layer. The photoresist layer is patterned, the inorganic layer is patterned into an inorganic mask, and the photoresist layer is removed. The exposed part of the grown silicon dioxide is selectively removed by using the inorganic mask, and the inorganic mask is removed. Then the second layer of the silicon dioxide is grown on the exposed part existing below the silicon substrate, and the silicon dioxide layer is patterned into a gate oxide.
Abstract:
Methods forming a trench region of a trench capacitor structure having increase surface area are provided. One method includes the steps of forming a discontinuous polysilicon layer (43) on exposed walls of a lower trench region, the discontinuous polysilicon layer having gaps (44) therein which expose portions of said substrate; oxidizing the lower trench region such that the exposed portions of said substrate provided by the gaps in the discontinuous polysilicon layer are oxidized into oxide material which forms a smooth and wavy layer with the discontinuous polysilicon layer; and etching said oxide material so as to form smooth hemispherical grooves (46) on the walls of the trench region.
Abstract:
A process for fabricating a single-sided semiconductor deep trench structure filled with polysilicon trench fill material includes the following steps. Form a thin film, silicon nitride, barrier layer over the trench fill material. Deposit a thin film of an amorphous silicon masking layer over the barrier layer. Perform an angled implant into portions of the amorphous silicon masking layer which are not in the shadow of the deep trench. Strip the undoped portions of the amorphous silicon masking layer from the deep trench. Then strip the newly exposed portions of barrier layer exposing a part of the trench fill polysilicon surface and leaving the doped, remainder of the amorphous silicon masking layer exposed. Counterdope the exposed part of the trench fill material. Oxidize exposed portions of the polysilicon trench fill material, and then strip the remainder of the masking layer.
Abstract:
A process of forming a hybrid memory cell which is scalable to a minimum feature size, F, of about 60 nm at an operating voltage of Vblh of about 1.5 V and substantially free of floating-well effects.
Abstract:
The present provides a method for tailoring silicon dioxide source and drain implants and, if desired, extension implants of different devices used on a semiconductor wafer in order to realize shallow junctions and minimize the region of overlap between the gate and source and drain regions and any extension implants. The method includes the steps of applying a mask over a first gate structure positioned on a semiconductor substrate, depositing a layer of a spacer material over the surface of the first gate structure and a second gate structure adjacent to the first gate structure, etching the spacer material so that a portion of the spacer material remains on the second gate sidewalls and a sidewall of the block out mask, implanting ions into the semiconductor substrate into a region defined between the spacer material on the block out mask and the second gate to form a source or drain region, and removing the spacer material and block out mask. If desired, a second etch can be performed on the spacer material to reduce spacer thickness, and second ions can be implanted into the semiconductor substrate into an implant region defined between the spacer material remaining after the second etch.