摘要:
A method is provided for electroplating a gate metal or other conducting or semiconducting material directly on a dielectric such as a gate dielectric. The method involves selecting a substrate, dielectric layer, and electrolyte solution or melt, wherein the combination of the substrate, dielectric layer, and electrolyte solution or melt allow an electrochemical current to be passed from the substrate through the dielectric layer into the electrolyte solution or melt. Methods are also provided for electrochemical modification of dielectrics utilizing through-dielectric current flow.
摘要:
A method is provided for electroplating a gate metal or other conducting or semiconducting material directly on a dielectric such as a gate dielectric. The method involves selecting a substrate, dielectric layer, and electrolyte solution or melt, wherein the combination of the substrate, dielectric layer, and electrolyte solution or melt allow an electrochemical current to be passed from the substrate through the dielectric layer into the electrolyte solution or melt. Methods are also provided for electrochemical modification of dielectrics utilizing through-dielectric current flow.
摘要:
A contact metallurgy structure comprising a patterned dielectric layer having cavities on a substrate; a silicide or germanide layer such as of cobalt and/or nickel located at the bottom of cavities; a contact layer comprising Ti or Ti/TiN located on top of the dielectric layer and inside the cavities and making contact to the silicide or germanide layer on the bottom; a diffusion barrier layer located on top of the contact layer and inside the cavities; optionally a seed layer for plating located on top of the barrier layer; a metal fill layer in vias is provided along with a method of fabrication. The metal fill layer is electrodeposited with at least one member selected from the group consisting of copper, rhodium, ruthenium, iridium, molybdenum, gold, silver, nickel, cobalt, silver, gold, cadmium and zinc and alloys thereof. When the metal fill layer is rhodium, ruthenium, or iridium, an effective diffusion barrier layer is not required between the fill metal and the dielectric. When the barrier layer is platable, such as ruthenium, rhodium, platinum, or iridium, the seed layer is not required.
摘要:
Disclosed is a method for making a metal gate for a FET, wherein the metal gate comprises at least some material deposited by electroplating as well as an FET device comprising a metal gate that is at least partially plated. Further disclosed is a method for making a metal gate for a FET wherein the metal gate comprises at least some plated material and the method comprises the steps of: selecting a substrate having a top surface and a recessed region; conformally depositing a thin conductive seed layer on the substrate; and electroplating a filler gate metal on the seed layer to fill and overfill the recessed region.
摘要:
Disclosed is a method for making a metal gate for a FET, wherein the metal gate comprises at least some material deposited by electroplating as well as an FET device comprising a metal gate that is at least partially plated. Further disclosed is a method for making a metal gate for a FET wherein the metal gate comprises at least some plated material and the method comprises the steps of: selecting a substrate having a top surface and a recessed region; conformally depositing a thin conductive seed layer on the substrate; and electroplating a filler gate metal on the seed layer to fill and overfill the recessed region.
摘要:
An advanced gate structure that includes a filly silicided metal gate and silicided source and drain regions in which the fully silicided metal gate has a thickness that is greater than the thickness of the silicided source/drain regions is provided. A method of forming the advanced gate structure is also provided in which the silicided source and drain regions are formed prior to formation of the silicided metal gate region.
摘要:
A composite material comprising a layer containing copper, and an electrodeposited CoWP film on the copper layer. The CoWP film contains from 11 atom percent to 25 atom percent phosphorus and has a thickness from 5 nm to 200 nm. The invention is also directed to a method of making an interconnect structure comprising: providing a trench or via within a dielectric material, and a conducting metal containing copper within the trench or the via; and forming a CoWP film by electrodeposition on the copper layer. The CoWP film contains from 10 atom percent to 25 atom percent phosphorus and has a thickness from 5 nm to 200 nm. The invention is also directed to a interconnect structure comprising a dielectric layer in contact with a metal layer; an electrodeposited CoWP film on the metal layer, and a copper layer on the CoWP film.
摘要:
An opto-thermal annealing method for forming a field effect transistor uses a reflective metal gate so that electrical properties of the metal gate and also interface between the metal gate and a gate dielectric are not compromised when opto-thermal annealing a source/drain region adjacent the metal gate. Another opto-thermal annealing method may be used for simultaneously opto-thermally annealing: (1) a silicon layer and a silicide forming metal layer to form a fully silicided gate; and (2) a source/drain region to form an annealed source/drain region. An additional opto-thermal annealing method may use a thermal insulator layer in conjunction with a thermal absorber layer to selectively opto-thermally anneal a silicon layer and a silicide forming metal layer to form a fully silicide gate.
摘要:
A semiconductor device such as a complementary metal oxide semiconductor (CMOS) comprising at least one FET that comprises a gate electrode comprising a metal carbide and method of fabrication are provided. The CMOS comprises dual work function metal gate electrodes whereby the dual work functions are provided by a metal and a carbide of a metal.
摘要:
A method of forming a CMOS structure, and the device produced therefrom, having improved threshold voltage and flatband voltage stability. The inventive method includes the steps of providing a semiconductor substrate having an nFET region and a pFET region; forming a dielectric stack atop the semiconductor substrate comprising an insulating interlayer atop a high k dielectric; removing the insulating interlayer from the nFET region without removing the insulating interlayer from the pFET region; and providing at least one gate stack in the pFET region and at least one gate stack in the nFET region. The insulating interlayer can be AlN or AlOxNy. The high k dielectric can be HfO2, hafnium silicate or hafnium silicon oxynitride. The insulating interlayer can be removed from the nFET region by a wet etch including a HCl/H2O2 peroxide solution.
摘要翻译:一种形成CMOS结构的方法及其制造的器件,具有改进的阈值电压和平带电压稳定性。 本发明的方法包括提供具有nFET区和pFET区的半导体衬底的步骤; 在所述半导体衬底上形成包括在高k电介质顶上的绝缘夹层的电介质叠层; 从nFET区域去除绝缘中间层而不从pFET区域去除绝缘中间层; 以及在pFET区域中提供至少一个栅极堆叠以及在nFET区域中提供至少一个栅极堆叠。 绝缘中间层可以是AlN或AlO x N y Y。 高k电介质可以是HfO 2,硅酸铪或铪硅氮氧化物。 可以通过包含HCl / H 2 O 2 O 2过氧化物溶液的湿蚀刻从nFET区域去除绝缘中间层。