摘要:
An example process to remove spacers from the gate of a NMOS transistor. A stress creating layer is formed over the NMOS and PMOS transistors and the substrate. In an embodiment, the spacers on gate are removed so that stress layer is closer to the channel of the device. The stress creating layer is preferably a tensile nitride layer. The stress creating layer is preferably a contact etch stop liner layer. In an embodiment, the gates, source and drain region have a silicide layer thereover before the stress creating layer is formed. The embodiment improves the performance of the NMOS transistors.
摘要:
A dual damascene structure comprising a composite barrier/etch stop layer including a lower silicon carbide (SiC) layer and an upper first oxygen doped SiC layer formed over a substrate is provided. A first dielectric layer is formed over the first oxygen doped SiC layer followed by a second oxygen doped SiC etch stop layer, and a second dielectric layer. An opening with a via and an overlying trench extends through the second dielectric layer, the second oxygen doped SiC etch stop layer, the first dielectric layer, the upper first oxygen doped SiC layer and at least a portion of the lower silicon carbide (SiC) layer. The opening is filled with a diffusion barrier layer and a metal layer.
摘要:
A method of improving adhesion of low dielectric constant films to other dielectric films is described. A low dielectric constant material layer is deposited on a substrate. The low dielectric constant material layer is treated with helium plasma. An overlying layer is deposited on the low dielectric constant material layer wherein there is good adhesion between the low dielectric constant material layer and the overlying layer.
摘要:
An example method embodiment forms spacers that create tensile stress on the substrate on both the PFET and NFET regions. We form PFET and NFET gates and form tensile spacers on the PFET and NFET gates. We implant first ions into the tensile PFET spacers to form neutralized stress PFET spacers. The neutralized stress PFET spacers relieve the tensile stress created by the tensile stress spacers on the substrate. This improves device performance.
摘要:
A method of improving adhesion of low dielectric constant films to other dielectric films is described. A low dielectric constant material layer is deposited on a substrate. The low dielectric constant material layer is treated with helium plasma. An overlying layer is deposited on the low dielectric constant material layer wherein there is good adhesion between the low dielectric constant material layer and the overlying layer.
摘要:
An improved method of controlling a critical dimension during a photoresist patterning process is provided which can be applied to forming vias and trenches in a dual damascene structure. An amorphous carbon ARC is deposited on a substrate by a PECVD method. Preferred conditions are a RF power from 50 to 500 Watts, a bias of 500 to 2000 Watts, a chamber and substrate temperature of 300° C. to 400° C. with a trimethylsilane flow rate of 50 to 200 sccm, a helium flow rate of 100 to 1000 sccm, and an argon flow rate of 50 to 200 sccm. Argon plasma imparts an amorphous character to the film. The refractive index (n and k) can be tuned for a variety of photoresist applications including 193 nm, 248 nm, and 365 nm exposures. The &agr;-carbon layer provides a high etch selectivity relative to oxide and can be easily removed with a plasma etch.
摘要:
A method for depositing silicon dioxide between features has been achieved. The method may be applied intermetal dielectrics, interlevel dielectric, or shallow trench isolations. This method prevents dielectric voids, corner clipping, and plasma induced damage in very small feature applications. Features, such as conductive traces, are provided overlying a semiconductor substrate where the spaces between the features form gaps. A silicon dioxide liner layer is deposited overlying the features and lining the gaps, yet leaving the gaps open. The silicon dioxide liner layer depositing step is by high density plasma, chemical vapor deposition (HDP CVD) using a gas mixture comprising silane, oxygen, and argon. The argon gas pressure, chamber pressure, and the sputter rf energy are kept low. A silicon dioxide gap filling layer is deposited overlying the silicon dioxide liner layer to fill the gaps, and the integrated circuit device is completed. The silicon dioxide gap filling layer depositing step is by high density plasma, chemical vapor deposition (HDP CVD) using a gas mixture comprising silane, oxygen, and argon. The argon gas pressure and chamber pressure are kept low while the sputter rf energy is increased.
摘要:
A first example embodiment provides a method of removing first spacers from gates and incorporating a low-k material into the ILD layer to increase device performance. A second example embodiment comprises replacing the first spacers after silicidation with low-k spacers. This serves to reduce the parasitic capacitances. Also, by implementing the low-k spacers only after silicidation, the embodiments' low-k spacers are not compromised by multiple high dose ion implantations and resist strip steps. The example embodiments can improve device performance, such as the performance of a rim oscillator.
摘要:
A polishing process in a semiconductor device fabrication process employs a polishing composition in which a gaseous phase is created within the polishing composition. During a polishing process, the gaseous phase dynamically responds to changes in the surface profile of the material undergoing removal by chemical and abrasive action during polishing. The inert gas bubble density dynamically increases in proximity to surface region of the substrate being polished that are prone to dishing and erosion. The increased inert gas bubble density operates to reduce the polish removal rate relative to other regions of the substrate. The dynamic action of the gaseous phase within the polishing composition functions to selectively reduce the localized polish removal rate such that a uniformly smooth and flat polished surface is obtained that is independent of the influence of pattern density during the polishing process.
摘要:
A first example embodiment provides a method of removing first spacers from gates and incorporating a low-k material into the ILD layer to increase device performance. A second example embodiment comprises replacing the first spacers after silicidation with low-k spacers. This serves to reduce the parasitic capacitances. Also, by implementing the low-k spacers only after silicidation, the embodiments' low-k spacers are not compromised by multiple high dose ion implantations and resist strip steps. The example embodiments can improve device performance, such as the performance of a rim oscillator.