摘要:
During the fabrication of advanced transistors, significant dopant diffusion may be suppressed by performing a millisecond anneal process after completing the basic transistor configuration, wherein a stress memorization technique may also be obtained by forming a strain-inducing area within a sidewall spacer structure. Due to the corresponding void formation in the spacer structure, a high tensile strain component may be obtained in the adjacent channel region.
摘要:
In advanced SOI devices, a high tensile strain component may be achieved on the basis of a globally strained semiconductor layer, while at the same time a certain compressive strain may be induced in P-channel transistors by appropriately selecting a height-to-length aspect ratio of the corresponding active regions. It has been recognized that the finally obtained strain distribution in the active regions is strongly dependent on the aspect ratio of the active regions. Thus, by selecting a moderately low height-to-length aspect ratio for N-channel transistors, a significant fraction of the initial tensile strain component may be preserved. On the other hand, a moderately high height-to-length aspect ratio for the P-channel transistor may result in a compressive strain component in a central surface region of the active region.
摘要:
By incorporating carbon by means of ion implantation and a subsequent flash-based or laser-based anneal process, strained silicon/carbon material with tensile strain may be positioned in close proximity to the channel region, thereby enhancing the strain-inducing mechanism. The carbon implantation may be preceded by a pre-amorphization implantation, for instance on the basis of silicon. Moreover, by removing a spacer structure used for forming deep drain and source regions, the degree of lateral offset of the strained silicon/carbon material with respect to the gate electrode may be determined substantially independently from other process requirements. Moreover, an additional sidewall spacer used for forming metal silicide regions may be provided with reduced permittivity, thereby additionally contributing to an overall performance enhancement.
摘要:
A non-conformal metal silicide in a transistor of recessed drain and source configuration may provide enhanced efficiency with respect to strain-inducing mechanisms, drain/source resistance and the like. For this purpose, in some cases, an amorphizing implantation process may be performed prior to the silicidation process, while in other cases an anisotropic deposition of the refractory metal may be used.
摘要:
By providing a substantially non-damaged semiconductor region between a pre-amorphization region and the gate electrode structure, an increase of series resistance at the drain side during the re-crystallization may be reduced, thereby contributing to overall transistor performance, in particular in the linear operating mode. Thus, symmetric and asymmetric transistor architectures may be achieved with enhanced performance without unduly adding to overall process complexity.
摘要:
A method of forming a semiconductor structure comprises providing a semiconductor substrate comprising a first transistor element and a second transistor element. Each of the first transistor element and the second transistor element comprises a gate electrode. A stressed material layer is deposited over the first transistor element and the second transistor element. The stressed material layer is processed to form from the stressed material layer sidewall spacers adjacent the gate electrode of the second transistor element and a hard mask covering the first transistor element. A pair of cavities is formed adjacent the gate electrode of the second transistor element. A pair of stress-creating elements is formed in the cavities and the hard mask is at least partially removed.
摘要:
A method and a semiconductor device are provided in which respective contact layers having a specific intrinsic stress may be directly formed on respective metal silicide regions without undue metal silicide degradation during an etch process for removing an unwanted portion of an initially deposited contact layer. Moreover, due to the inventive concept, the strain-inducing contact layers may be formed directly on the respective substantially L-shaped spacer elements, thereby enhancing even more the stress transfer mechanism.
摘要:
By using a disposable spacer approach for forming drain and source regions prior to an amorphization process for re-crystallizing a semiconductor region in the presence of a stressed spacer layer, possibly in combination with enhanced anneal techniques, such as laser and flash anneal processes, a more efficient strain-generating mechanism may be provided. Furthermore, the spacer for forming the metal silicide may be provided with reduced width, thereby positioning the respective metal silicide regions more closely to the channel region. Consequently, an overall enhanced performance may be obtained on the basis of the above-described techniques.
摘要:
In a multiple gate transistor, the plurality of Fins of the drain or source of the transistor are electrically connected to each other by means of a common contact element, wherein enhanced uniformity of the corresponding contact regions may be accomplished by an enhanced silicidation process sequence. For this purpose, the Fins may be embedded into a dielectric material in which an appropriate contact opening may be formed to expose end faces of the Fins, which may then act as silicidation surface areas.
摘要:
A non-conformal metal silicide in a transistor of recessed drain and source configuration may provide enhanced efficiency with respect to strain-inducing mechanisms, drain/source resistance and the like. For this purpose, in some cases, an amorphizing implantation process may be performed prior to the silicidation process, while in other cases an anisotropic deposition of the refractory metal may be used.