摘要:
Semiconductor islands respectively comprise at least a Si.sub.1-x Ge.sub.x layer and a distorted silicon layer that exhibits essentially the same lattice constant as the Si.sub.1-x Ge.sub.x layer are formed on an insulating layer that is located on a carrier plate. The semiconductor islands are preferably formed by selective epitaxy and comprise p-channel MOS transistors and/or n-channel MOS transistors.
摘要:
In order to produce a MOS transistor with HDD profile and LDD profile, the HDD profile is firstly formed, followed by the LDD profile, in the area for the LDD profile in order to produce steep dopant profiles. The LDD profile is preferably produced by etching and in situ doped selective epitaxy.
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:
One embodiment of the present invention relates to method for the concurrent deposition of multiple different crystalline structures on a semiconductor body utilizing in-situ differential epitaxy. In one embodiment of the present invention a preparation surface is formed, resulting in two distinct crystalline regions, a monocrystalline silicon substrate region and an isolating layer region. A monocrystalline silicon layer and an amorphous silicon layer are concurrently formed directly onto the preparation surface in the monocrystalline silicon substrate region and the isolating layer region, respectively. Deposition comprises the formation of two or more sub-layers. The process parameters can be varied for each individual sub-layer to optimize deposition characteristics.
摘要:
One embodiment of the present invention relates to method for the concurrent deposition of multiple different crystalline structures on a semiconductor body utilizing in-situ differential epitaxy. In one embodiment of the present invention a preparation surface is formed, resulting in two distinct crystalline regions, a monocrystalline silicon substrate region and an isolating layer region. A monocrystalline silicon layer and an amorphous silicon layer are concurrently formed directly onto the preparation surface in the monocrystalline silicon substrate region and the isolating layer region, respectively. Deposition comprises the formation of two or more sub-layers. The process parameters can be varied for each individual sub-layer to optimize deposition characteristics.
摘要:
A method is provided to fabricate a bipolar transistor with a low base connection resistance, low defect density and improved scalability. Scalability is to be understood in this case as both the lateral scaling of the emitter window and the vertical scaling of the base width (low temperature budget). The temperature budget can be kept low in the base region since no implantations are required in order to reduce the base connection resistance. Furthermore, the difficulties associated with the point defects are largely avoided.
摘要:
For manufacturing fine structures, nuclei that define the dimensions of the fine structures are formed on the surface of a substrate in a CVD process upon employment of a first process gas that contains SiH.sub.4 and GeH.sub.4 in a carrier gas. The nuclei can be employed both as a mask, for example, when etching or implanting, as will as active or passive component parts that remain in the structure, for example, as charge storages in the dielectric of an EEPROM.
摘要:
One embodiment of the present invention relates to method for the concurrent deposition of multiple different crystalline structures on a semiconductor body utilizing in-situ differential epitaxy. In one embodiment of the present invention a preparation surface is formed, resulting in two distinct crystalline regions, a monocrystalline silicon substrate region and an isolating layer region. A monocrystalline silicon layer and an amorphous silicon layer are concurrently formed directly onto the preparation surface in the monocrystalline silicon substrate region and the isolating layer region, respectively. Deposition comprises the formation of two or more sub-layers. The process parameters can be varied for each individual sub-layer to optimize deposition characteristics.
摘要:
In the inventive method for the wet-chemical removal of a sacrificial material in a material structure, there is first provided the material structure, wherein the material structure has a treatment region with the sacrificial material accessible through an opening. Subsequently, the sacrificial material is brought into contact with a wet-chemical treatment agent through the opening for the removal of the sacrificial material, wherein a mechanical vibration is generated in the wet-chemical treatment agent or in the wet-chemical treatment agent and the material structure during the contacting of the sacrificial material with the wet-chemical treatment agent.
摘要:
In a method for producing a protective cover for a device formed in a substrate, at first a sacrificial structure is produced on the substrate, wherein the sacrificial structure comprises a first portion covering a first area of the substrate including the device and a second portion extending from the first portion into a second area of the substrate including no device. Then a first cover layer is deposited that encloses the sacrificial structure such that the second portion of the sacrificial structure is at least partially exposed. Then the sacrificial structure is removed, and the structure formed by the removal of the sacrificial structure is closed.