摘要:
By recessing drain and source regions, a highly stressed layer, such as a contact etch stop layer, may be formed in the recess in order to enhance the strain generation in the adjacent channel region of a field effect transistor. Moreover, a strained semiconductor material may be positioned in close proximity to the channel region by reducing or avoiding undue relaxation effects of metal silicides, thereby also providing enhanced efficiency for the strain generation. In some aspects, both effects may be combined to obtain an even more efficient strain-inducing mechanism.
摘要:
By recessing drain and source regions, a highly stressed layer, such as a contact etch stop layer, may be formed in the recess in order to enhance the strain generation in the adjacent channel region of a field effect transistor. Moreover, a strained semiconductor material may be positioned in close proximity to the channel region by reducing or avoiding undue relaxation effects of metal silicides, thereby also providing enhanced efficiency for the strain generation. In some aspects, both effects may be combined to obtain an even more efficient strain-inducing mechanism.
摘要:
By recessing drain and source regions, a highly stressed layer, such as a contact etch stop layer, may be formed in the recess in order to enhance the strain generation in the adjacent channel region of a field effect transistor. Moreover, a strained semiconductor material may be positioned in close proximity to the channel region by reducing or avoiding undue relaxation effects of metal silicides, thereby also providing enhanced efficiency for the strain generation. In some aspects, both effects may be combined to obtain an even more efficient strain-inducing mechanism.
摘要:
By recessing drain and source regions, a highly stressed layer, such as a contact etch stop layer, may be formed in the recess in order to enhance the strain generation in the adjacent channel region of a field effect transistor. Moreover, a strained semiconductor material may be positioned in close proximity to the channel region by reducing or avoiding undue relaxation effects of metal silicides, thereby also providing enhanced efficiency for the strain generation. In some aspects, both effects may be combined to obtain an even more efficient strain-inducing mechanism.
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:
By forming a portion of a PN junction within strained silicon/germanium material in SOI transistors with a floating body architecture, the junction leakage may be significantly increased, thereby reducing floating body effects. The positioning of a portion of the PN junction within the strained silicon/germanium material may be accomplished on the basis of implantation and anneal techniques, contrary to conventional approaches in which in situ doped silicon/germanium is epitaxially grown so as to form the deep drain and source regions. Consequently, high drive current capability may be combined with a reduction of floating body effects.
摘要:
A strained semiconductor material may be positioned in close proximity to the channel region of a transistor, such as an SOI transistor, while reducing or avoiding undue relaxation effects of metal silicides and extension implantations, thereby providing enhanced efficiency for the strain generation.
摘要:
By removing a portion of a halo region or by avoiding the formation of the halo region within the extension region, which may be subsequently formed on the basis of a re-grown semiconductor material, the threshold roll off behavior may be significantly improved, wherein an enhanced current drive capability may simultaneously be achieved.
摘要:
By combining a plurality of stress inducing mechanisms in each of different types of transistors, a significant performance gain may be obtained, thereby providing enhanced flexibility in adjusting product specific characteristics. For this purpose, sidewall spacers with high tensile stress may be commonly formed on PMOS and NMOS transistors, wherein a deleterious effect on the PMOS transistor may be compensated for by a corresponding compressively stressed contact etch stop layer, while the NMOS transistor comprises a contact etch stop layer with tensile stress. Furthermore, the PMOS transistor comprises an embedded strained semiconductor layer for efficiently creating compressive strain in the channel region.
摘要:
By combining a plurality of stress inducing mechanisms in each of different types of transistors, a significant performance gain may be obtained, thereby providing enhanced flexibility in adjusting product specific characteristics. For this purpose, sidewall spacers with high tensile stress may be commonly formed on PMOS and NMOS transistors, wherein a deleterious effect on the PMOS transistor may be compensated for by a corresponding compressively stressed contact etch stop layer, while the NMOS transistor comprises a contact etch stop layer with tensile stress. Furthermore, the PMOS transistor comprises an embedded strained semiconductor layer for efficiently creating compressive strain in the channel region.