Abstract:
A CMOS device includes a silicon substrate and an electrical insulator formed over the silicon substrate. The device also includes an access pFET formed over the electrical insulator and a first gate stack and a storage pFET formed over the electrical insulator, the storage pFET including a second source region that is co-formed with the first drain region, a second channel region, and a second drain region. The device also includes a second gate stack including a second dielectric layer formed above the second channel region and a floating gate electrode formed above the second gate dielectric layer.
Abstract:
Methods for formation of epitaxial layers containing n-doped silicon are disclosed. Specific embodiments pertain to the formation and treatment of epitaxial layers in semiconductor devices, for example, Metal Oxide Semiconductor Field Effect Transistor (MOSFET) devices. In specific embodiments, the formation of the n-doped epitaxial layer involves exposing a substrate in a process chamber to deposition gases including a silicon source, a carbon source and an n-dopant source. An epitaxial layer may have considerable tensile stress which may be created in a significant amount by a high concentration of n-dopant. A layer having n-dopant may also have substitutional carbon. Phosphorus as an n-dopant with a high concentration is provided. A substrate having an epitaxial layer with a high level of n-dopant is also disclosed.
Abstract:
A device (2300) and method of reducing residual STI corner defects in a hybrid orientation transistor comprising, forming a direct silicon bonded substrate (2002) wherein a second silicon layer with a second crystal orientation is bonded to a handle substrate with a first crystal orientation, forming a pad oxide (2102) layer on the second silicon layer, forming a nitride layer (2104) on the pad oxide layer, forming an isolation trench (2206) within the direct silicon bonded substrate through the second silicon layer and into the handle substrate, patterning a PMOS region of the direct silicon bonded substrate utilizing photoresist (2302) including a portion of the isolation trench, implanting (2304) and amorphizing an NMOS region of the direct silicon bonded substrate, removing the photoresist, performing solid phase epitaxy, performing a recrystallization anneal, forming an STI liner, completing front end processing, and performing back end processing.
Abstract:
The invention concerns a method for producing a hybrid substrate, comprising a support substrate (40), a continuous buried insulator layer (42) and, on this layer, a hybrid layer (26 ) comprising alternating zones of a first material (26) and at least one second material (32), wherein these two materials are different by their nature and/or their crystallographic characteristics, said method comprising: - the formation of a hybrid layer (26), comprising alternating zones of first and second materials, on a homogeneous substrate (22), - the assembly of this hybrid layer, the continuous insulator layer (42) and the support substrate (40), - the elimination of a part at least of the homogeneous substrate (40), before or after the assembly step.
Abstract:
Integrated active area isolation structure for transistor to replace larger and more expensive Shallow Trench Isolation or field oxide to isolate transistors. Multiple well implant is formed with PN junctions between wells and with surface contacts to substrate and wells so bias voltages applied to reverse bias PN junctions to isolate active areas. Insulating layer is formed on top surface of substrate and interconnect channels are etched in insulating layer which do not go down to the semiconductor substrate. Contact openings for surface contacts to wells and substrate are etched in insulating layer down to semiconductor layer. Doped silicon or metal is formed in contact openings for surface contacts and to form interconnects in channels. Silicide may be formed on top of polycrystalline silicon contacts and interconnect lines to lower resistivity. Any JFET or MOS transistor may be integrated into the resulting junction isolated active area.