摘要:
By providing additional etch stop layers and/or etch protection layers, a corresponding etch process for forming contact openings for directly connecting polysilicon lines and active areas may be controlled in a highly reliable manner. Consequently, conductive line erosion and/or penetration into extension regions may be significantly reduced, thereby improving the reliability and performance of corresponding semiconductor devices.
摘要:
By providing an additional silicon dioxide based etch stop layer, a corresponding etch process for forming contact openings for directly connecting polysilicon lines and active areas may be controlled in a highly reliable manner. In another aspect, the etch selectivity of the contact structure may be increased by a modification of the etch behavior of the exposed portion of the contact etch stop layer.
摘要:
By providing an additional silicon dioxide based etch stop layer, a corresponding etch process for forming contact openings for directly connecting polysilicon lines and active areas may be controlled in a highly reliable manner. In another aspect, the etch selectivity of the contact structure may be increased by a modification of the etch behavior of the exposed portion of the contact etch stop layer.
摘要:
By providing additional etch stop layers and/or etch protection layers, a corresponding etch process for forming contact openings for directly connecting polysilicon lines and active areas may be controlled in a highly reliable manner. Consequently, conductive line erosion and/or penetration into extension regions may be significantly reduced, thereby improving the reliability and performance of corresponding semiconductor devices.
摘要:
The present invention provides a technique for forming differently stressed contact etch stop layers, wherein sidewall spacers are removed prior to the formation of the contact etch stop layers. During the partial removal of respective contact etch stop layers, a corresponding etch stop layer regime is used to substantially avoid any unwanted stress-inducing material residuals, thereby significantly enhancing the stress transfer mechanism.
摘要:
By partially removing an etch stop layer prior to the formation of a first contact etch stop layer, a superior stress transfer mechanism may be provided in an integration scheme for generating strain by means of contact etch stop layers. Thus, a semiconductor device having different types of transistors may be provided, in which a high degree of metal silicide integrity as well as a highly efficient stress transfer mechanism is achieved.
摘要:
During the patterning of respective contact etch stop layers having a different type of intrinsic stress, the deposition of an etch indicator layer between the first and the second contact etch stop layer may be omitted in order to avoid any undue effects of this layer during the subsequent processing. Local removal of the second stressed layer may be performed on the basis of an etch time controlled etch process, which in some aspects may include the provision of an etch indicator material, wherein feed forward and feed back measurement data may be used in an appropriately designed process controller.
摘要:
By performing a plasma treatment for efficiently sealing the surface of a stressed dielectric layer containing silicon nitride, an enhanced performance during the patterning of contact openings may be achieved, since nitrogen-induced resist poisoning may be significantly reduced during the selective patterning of stressed layers of different types of intrinsic stress.
摘要:
During the patterning of respective contact etch stop layers having a different type of intrinsic stress, the deposition of an etch indicator layer between the first and the second contact etch stop layer may be omitted in order to avoid any undue effects of this layer during the subsequent processing. Local removal of the second stressed layer may be performed on the basis of an etch time controlled etch process, which in some aspects may include the provision of an etch indicator material, wherein feed forward and feed back measurement data may be used in an appropriately designed process controller.
摘要:
The present invention provides a technique for forming differently stressed contact etch stop layers, wherein sidewall spacers are removed prior to the formation of the contact etch stop layers. During the partial removal of respective contact etch stop layers, a corresponding etch stop layer regime is used to substantially avoid any unwanted stress-inducing material residuals, thereby significantly enhancing the stress transfer mechanism.