摘要:
A method (100) of forming semiconductor structures (202) including high-temperature processing steps (step 118), incorporates the use of a high-temperature nitride-oxide mask (220) over protected regions (214) of the device (202). The invention has application in many different embodiments, including but not limited to, the formation of recess, strained device regions (224).
摘要:
A method (100) of forming a transistor includes forming a gate structure (108) over a semiconductor body and forming recesses (112) using an isotropic etch using the gate structure as an etch mask. The isotropic etch forms a recess in the semiconductor body that extends laterally in the semiconductor body toward a channel portion of the semiconductor body underlying the gate structure. The method further includes epitaxially growing silicon (114) comprising stress-inducing species in the recesses. The source and drain regions are then implanted (120) in the semiconductor body on opposing sides of the gate structure.
摘要:
A method (100) of forming a transistor includes forming a gate structure (106, 108) over a semiconductor body and forming recesses (112) substantially aligned to the gate structure in the semiconductor body. Carbon-doped silicon is then epitaxially grown (114) in the recesses, followed by forming sidewall spacers (118) over lateral edges of the gate structure. The method continues by implanting source and drain regions in the semiconductor body (120) after forming the sidewall spacers. The carbon-doped silicon formed in the recesses resides close to the transistor channel and serves to provide a tensile stress to the channel, thereby facilitating improved carrier mobility in NMOS type transistor devices.
摘要:
A method (100) of forming a transistor includes forming a gate structure (106, 108) over a semiconductor body and forming recesses (112) substantially aligned to the gate structure in the semiconductor body. Amorphous silicon regions are then formed (114) in the recesses. The amorphous silicon regions are re-crystallized. Sidewall spacers are formed (118) over lateral edges of the gate structure. The method continues by implanting source and drain regions in the semiconductor body (120) after forming the sidewall spacers. The re-crystallized silicon regions formed in the recesses reside close to the transistor channel and serve to facilitate improved carrier mobility in NMOS type transistor devices.
摘要:
Methods (50) are presented for transistor fabrication, in which first and second sidewall spacers (120a, 120b) are formed laterally outward from a gate structure (114), after which a source/drain region (116) is implanted. The method (50) further comprises removing all or a portion of the second sidewall spacer (120b) after implanting the source/drain region (116), where the remaining sidewall spacer (120a) is narrower following the source/drain implant to improve source/drain contact resistance and PMD gap fill, and to facilitate inducing stress in the transistor channel.
摘要:
A method (100) of forming a transistor includes forming a gate structure (108) over a semiconductor body and forming recesses (112) using an isotropic etch using the gate structure as an etch mask. The isotropic etch forms a recess in the semiconductor body that extends laterally in the semiconductor body toward a channel portion of the semiconductor body underlying the gate structure. The method further includes epitaxially growing silicon (114) comprising stress-inducing species in the recesses. The source and drain regions are then implanted (120) in the semiconductor body on opposing sides of the gate structure.
摘要:
A method (200) fabricating a semiconductor device is disclosed. A poly oxide layer is formed over gate electrodes (210) on a semiconductor body and active regions defined within the semiconductor body in PMOS and NMOS regions. A nitride containing cap oxide layer is formed over the grown poly oxide layer (212). Offset spacers are formed adjacent to sidewalls of the gate electrodes (216). Extension regions are then formed (214) within the PMOS region and the NMOS region. Sidewall spacers are formed (218) adjacent to the sidewalls of the gate. electrodes. An n-type dopant is implanted into the NMOS region to form source/drain regions and a p-type dopant is implanted with an overdose amount into the PMOS region to form the source/drain regions within the PMOS region (220). A poly cap layer is formed over the device (222) and an anneal or other thermal process is performed (224) that causes the p-type dopant to diffuse into the nitride containing cap oxide layer and obtain a selected dopant profile having sufficient lateral abruptness.
摘要:
Transistor fabrication methods (50) are presented in which shrinkable sidewall spacers (120) are formed (66, 68) along sides of a transistor gate (114), and a source/drain implant is performed (74) after forming the sidewall spacer (120). The sidewall spacer width is then reduced by annealing the shrinkable sidewall spacer material (76) following the source/drain implant (74).
摘要:
A method (100) of forming semiconductor structures (202) including high-temperature processing steps (step 118), incorporates the use of a high-temperature nitride-oxide mask (220) over protected regions (214) of the device (202). The invention has application in many different embodiments, including but not limited to, the formation of recess, strained device regions (224).
摘要:
Methods (50) are presented for transistor fabrication, in which first and second sidewall spacers (120a, 120b) are formed laterally outward from a gate structure (114), after which a source/drain region (116) is implanted. The method (50) further comprises removing all or a portion of the second sidewall spacer (120b) after implanting the source/drain region (116), where the remaining sidewall spacer (120a) is narrower following the source/drain implant to improve source/drain contact resistance and PMD gap fill, and to facilitate inducing stress in the transistor channel.