Taiwan Semiconductor Manufacturing Comp. Ltd.

Chen-Cheng Chou

Tzong-Sheng Chang

Shiu-Ko JangJian

Cheng-Ta Wu

Bor-Zen Tien

Jenn Tsao

Wen-Jye Yue

A method includes forming patterned masks over a semiconductor substrate; etching the semiconductor substrate using the patterned masks as an etch mask to form semiconductor fins with a trench between the semiconductor fins; performing an annealing process using a hydrogen containing gas to smooth surfaces of the semiconductor fins; after performing the annealing process, selectively forming a first liner on the smoothed surfaces of the semiconductor fins, while leaving surfaces of the patterned masks exposed by the first liner; filling the trench with a dielectric material; and etching back the first liner and the dielectric material to form an isolation structure between the semiconductor fins.

Method for manufacturing semiconductor structure

A method for manufacturing a semiconductor structure includes etching trenches in a semiconductor substrate to form a semiconductor fin between the trenches; converting sidewalls of the semiconductor fin into hydrogen-terminated surfaces each having silicon-to-hydrogen (S&#x2014;H) bonds; after converting the sidewalls of the semiconductor fin into the hydrogen-terminated surfaces, depositing a dielectric material overfilling the trenches; and etching back the dielectric material to fall below a top surface of the semiconductor fin.

A method for manufacturing a semiconductor structure is provided. A plurality of trenches are formed in a substrate. The trenches define at least one fin therebetween. The fin is hydrogen annealed. A dielectric material is formed in the trenches. The dielectric material in the trenches is recessed.

Semiconductor structure having trench and manufacturing method thereof

This invention provides a method for forming a self-aligned silicide with low sheet resistance in the N&plus; source and drain regions and the N&plus; polysilicon regions in a semiconductor device using a titanium nitride barrier layer to prevent nitridation of an underlying titanium layer during rapid thermal anneal. The process begins by providing a substrate structure having a gate thereon. A titanium layer is deposited over the substrate structure and the gate. Mixing ions are implanted through the titanium layer into source and drain regions adjacent to the gate. A titanium nitride barrier layer is deposited on the titanium layer. The substrate structure is rapid thermal annealed causing the titanium layer to react with the underlying silicon to form silicide. The substrate structure is selectively etched to remove the titanium nitride barrier layer and unreacted titanium. A second rapid thermal anneal is performed.

Method for salicide process using a titanium nitride barrier layer

A process has been developed in which a capacitor structure can be simultaneously fabricated with NFET and PFET devices, to be used in EEPROM, SRAM or DRAM cells. The process features the use of a silicon nitride layer, protecting an underlying capacitor dielectric layer from an oxidation ambient, presented during a subsequent NFET source and drain drive-in procedure.

Fabrication process for MOSFET devices and a reproducible capacitor

A method was achieved for making FET stacked gate electrode structures with improved sidewall profiles. These more vertical sidewalls improve the control tolerance of the gate electrode length (L.sub.eff) and improve the shape of the sidewall spacers for making more reliable metal contacts to the self-aligned source/drain contact areas. The method uses a stacked gate electrode layer having a TEOS oxide and a hard mask of silicon nitride on the gate electrode polysilicon layer. During patterning of the stacked gate electrode structure using a photoresist mask, the hard mask minimizes the buildup of a polymer on the TEOS oxide sidewall. This polymer would otherwise act as a masking material resulting in an abrupt step at the TEOS oxide/polysilicon interface when the polysilicon etch is completed. This results in improved gate electrode line length tolerance and much improved sidewall spacers that minimize electrical shorts between the metal source/drain contacts and the polysilicon gate electrodes.

Method for making improved polysilicon FET gate electrode structures and

A process has been developed in which a capacitor structure can be simultaneously fabricated with NFET and PFET to be used in EEPROM, SRAM or DRAM cells. The process features the use of a silicon nitride layer, protecting an underlying capacitor dielectric layer from an oxidation ambient, presented during a subsequent NFET source and drain drive-in procedure.

Growing community of inventors

Tainan, Taiwan

Chen-Cheng Chou