摘要:
Methods of reducing a short channel phenomena for an NMOS device formed in an SOI layer, wherein the short channel phenomena is created by boron movement from a channel region to adjacent insulator regions, has been developed. A first embodiment of this invention entails the formation of a boron or nitrogen doped insulator layer located underlying the NMOS device. This is accomplished via formation of shallow trench openings in composite silicon nitride—silicon shapes, followed by lateral pull back of the silicon nitride shapes exposing portions of the top surface of the silicon shapes, followed by implantation of boron or nitrogen ions into portions of the insulator layer exposed in the STI openings and into portions of the insulator layer underlying exposed portions of the silicon shapes. A subsequent hydrogen anneal procedure finalizes the doped insulator layer which alleviates boron segregation from an overlying NMOS channel region. A second embodiment features the formation of a dielectric barrier layer on the surfaces of STI openings preventing boron from segregated to silicon oxide filled STI regions. A combination of both embodiments can be employed to reduce and prevent boron segregation to both underlying and adjacent insulator regions, thus reducing the risk of short channel phenomena.
摘要:
Methods of reducing a short channel phenomena for an NMOS device formed in an SOI layer, wherein the short channel phenomena is created by boron movement from a channel region to adjacent insulator regions, has been developed. A first embodiment of this invention entails the formation of a boron or nitrogen doped insulator layer located underlying the NMOS device. This is accomplished via formation of shallow trench openings in composite silicon nitride-silicon shapes, followed by lateral pull back of the silicon nitride shapes exposing portions of the top surface of the silicon shapes, followed by implantation of boron or nitrogen ions into portions of the insulator layer exposed in the STI openings and into portions of the insulator layer underlying exposed portions of the silicon shapes. A subsequent hydrogen anneal procedure finalizes the doped insulator layer which alleviates boron segregation from an overlying NMOS channel region. A second embodiment features the formation of a dielectric barrier layer on the surfaces of STI openings preventing boron from segregated to silicon oxide filled STI regions. A combination of both embodiments can be employed to reduce and prevent boron segregation to both underlying and adjacent insulator regions, thus reducing the risk of short channel phenomena.
摘要:
A semiconductor device and method for forming the same including improved electrostatic discharge protection for advanced semiconductor devices, the semiconductor device including providing semiconductor substrate having a pre-selected surface orientation and crystal direction; an insulator layer overlying the semiconductor substrate; a first semiconductor active region overlying the insulator layer having a first surface orientation selected from the group consisting of and ; a second semiconductor active region extending through a thickness portion of the insulator layer having a second surface orientation selected from the group consisting of and different from the first surface orientation; wherein MOS devices including a first MOS device of a first conduction type is disposed on the first semiconductor active region and a second MOS device of a second conduction type is disposed on the second semiconductor active region.
摘要:
A fin-FET device and a method for fabrication thereof both employ a bulk semiconductor substrate. A fin and an adjoining trough are formed within the bulk semiconductor substrate. The trough is partially backfilled with a deposited dielectric layer to form an exposed fin region and an unexposed fin region. A gate dielectric layer is formed upon the exposed fin region and a gate electrode is formed upon the gate dielectric layer. By employing a bulk semiconductor substrate the fin-FET device is fabricated cost effectively.
摘要:
In a method of manufacturing a semiconductor device, an initial structure is provided. The initial structure includes a substrate, a patterned silicon layer, and a covering layer. The substrate has a buried insulator layer formed thereon. The patterned silicon layer is formed on the buried insulator layer. The covering layer is formed on the patterned silicon layer. A first layer is formed on the initial structure. Part of the first layer is removed with an etching process, such that a sidewall portion of the patterned silicon layer is exposed and such that a remaining portion of the first layer remains at a corner where the patterned silicon layer interfaces with the buried insulator layer. An oxide liner is formed on the exposed sidewall portion. A recess may be formed in the buried insulator layer (prior to forming the first layer) and may extend partially beneath the patterned silicon layer.
摘要:
A FinFET split gate EEPROM structure includes a semiconductor substrate and an elongated semiconductor fin extending above the substrate. A control gate straddles the fin, the fin's sides and a first drain-proximate portion of a channel between a source and drain in the fin. The control gate includes a tunnel layer and a floating electrode over which are a first insulative stratum and a first conductive stratum. A select gate straddles the fin and its sides and a second, source-promixate portion of the channel. The select gate includes a second insulative stratum and a second conductive stratum. The insulative strata are portions of a continuous insulative layer covering the substrate and the fin. The conductive strata are electrically continuous portions of a continuous conductive layer formed on the insulative layer.
摘要:
In a method of manufacturing a semiconductor device, an initial structure is provided. The initial structure includes a substrate, a patterned silicon layer, and a covering layer. The substrate has a buried insulator layer formed thereon. The patterned silicon layer is formed on the buried insulator layer. The covering layer is formed on the patterned silicon layer. A first layer is formed on the initial structure. Part of the first layer is removed with an etching process, such that a sidewall portion of the patterned silicon layer is exposed and such that a remaining portion of the first layer remains at a corner where the patterned silicon layer interfaces with the buried insulator layer. An oxide liner is formed on the exposed sidewall portion. A recess may be formed in the buried insulator layer (prior to forming the first layer) and may extend partially beneath the patterned silicon layer.
摘要:
In a method of manufacturing a semiconductor device, an initial structure is provided. The initial structure includes a substrate, a patterned silicon layer, and a covering layer. The substrate has a buried insulator layer formed thereon. The patterned silicon layer is formed on the buried insulator layer. The covering layer is formed on the patterned silicon layer. A first layer is formed on the initial structure. Part of the first layer is removed with an etching process, such that a sidewall portion of the patterned silicon layer is exposed and such that a remaining portion of the first layer remains at a corner where the patterned silicon layer interfaces with the buried insulator layer. An oxide liner is formed on the exposed sidewall portion. A recess may be formed in the buried insulator layer (prior to forming the first layer) and may extend partially beneath the patterned silicon layer.
摘要:
A fin-FET device and a method for fabrication thereof both employ a bulk semiconductor substrate. A fin and an adjoining trough are formed within the bulk semiconductor substrate. The trough is partially backfilled with a deposited dielectric layer to form an exposed fin region and an unexposed fin region. A gate dielectric layer is formed upon the exposed fin region and a gate electrode is formed upon the gate dielectric layer. By employing a bulk semiconductor substrate the fin-FET device is fabricated cost effectively.
摘要:
In a method of manufacturing a semiconductor device, an initial structure is provided. The initial structure includes a substrate, a patterned silicon layer, and a covering layer. The substrate has a buried insulator layer formed thereon. The patterned silicon layer is formed on the buried insulator layer. The covering layer is formed on the patterned silicon layer. A first layer is formed on the initial structure. Part of the first layer is removed with an etching process, such that a sidewall portion of the patterned silicon layer is exposed and such that a remaining portion of the first layer remains at a corner where the patterned silicon layer interfaces with the buried insulator layer. An oxide liner is formed on the exposed sidewall portion. A recess may be formed in the buried insulator layer (prior to forming the first layer) and may extend partially beneath the patterned silicon layer.