摘要:
A semiconductor device including reentrant isolation structures and a method for making such a device. A preferred embodiment comprises a substrate of semiconductor material forming at least one isolation structure having a reentrant profile and isolating one or more adjacent operational components. The reentrant profile of the at least one isolation structure is formed of substrate material and is created by ion implantation, preferably using oxygen ions applied at a number of different angles and energy levels. In another embodiment the present invention is a method of forming an isolation structure for a semiconductor device performing at least one oxygen ion implantation.
摘要:
The present disclosure provides a method of fabricating a FinFET element including providing a substrate including a first fin and a second fin. A first layer is formed on the first fin. The first layer comprises a dopant of a first type. A dopant of a second type is provided to the second fin. High temperature processing of the substrate is performed on the substrate including the formed first layer and the dopant of the second type.
摘要:
A method of forming an integrated circuit device includes providing a semiconductor substrate; forming a gate structure on the semiconductor substrate; and performing a pre-amorphized implantation (PAI) by implanting a first element selected from a group consisting essentially of indium and antimony to a top portion of the semiconductor substrate adjacent to the gate structure. The method further includes, after the step of performing the PAI, implanting a second element different from the first element into the top portion of the semiconductor substrate. The second element includes a p-type element when the first element includes indium, and includes an n-type element when the first element includes antimony.
摘要:
A semiconductor structure includes a first semiconductor strip extending from a top surface of the semiconductor substrate into the semiconductor substrate, wherein the first semiconductor strip has a first height. A first insulating region is formed in the semiconductor substrate and surrounding a bottom portion of the first semiconductor strip, wherein the first insulating region has a first top surface lower than a top surface of the first semiconductor strip. A second semiconductor strip extends from a top surface of the semiconductor substrate into the semiconductor substrate, wherein the second semiconductor strip has a second height greater than the first height. A second insulating region is formed in the semiconductor substrate and surrounding a bottom portion of the second semiconductor strip, wherein the second insulating region has a second top surface lower than the first top surface, and wherein the first and the second insulating regions have substantially same thicknesses.
摘要:
The disclosure describes a multi-layer shallow trench isolation structure in a semiconductor device. The shallow trench isolation structure may include a first void-free, doped oxide layer in the shallow trench, and a second void-free layer above the first doped oxide layer. The first layer may be formed by vapor deposition of precursors of a source of silicon, a source of oxygen and sources of doping materials and making the layer void-free by reflowing the initial layer by an annealing process. The second layer may be formed by vapor deposition of precursors of silicon and doping materials and making the layer void-free by reflowing the initial layer by an annealing process. Alternatively, the second layer may be a silicon oxide layer that may be formed by an atomic layer deposition method. The processing conditions for forming the two layers are different.
摘要:
A method of forming a semiconductor structure includes providing a semiconductor substrate; forming a gate dielectric over the semiconductor substrate, wherein the semiconductor substrate and a sidewall of the gate dielectric has a joint point; forming a gate electrode over the gate dielectric; forming a mask layer over the semiconductor substrate and the gate electrode, wherein a first portion of the mask layer adjacent the joint point is at least thinner than a second portion of the mask layer away from the joint point; after the step of forming the mask layer, performing a halo/pocket implantation to introduce a halo/pocket impurity into the semiconductor substrate; and removing the mask layer after the halo/pocket implantation.
摘要:
A method is provided for improving Idsat in NMOS and PMOS transistors. A silicon nitride etch stop layer is deposited by a PECVD technique on STI and silicide regions and on sidewall spacers during a MOSFET manufacturing scheme. A dielectric layer is formed on the nitride and then contact holes are fabricated through the dielectric layer and nitride layer to silicide regions and are filled with a metal. For NMOS transistors, silane and NH3 flow rates and a 400° C. temperature are critical in improving NMOS short channel Idsat. Hydrogen content in the nitride is increased by higher NH3 and SiH4 flow rates but does not significantly degrade HCE and Vt. With PMOS transistors, deposition temperature is increased to 550° C. to reduce hydrogen content and improve HCE and Vt stability.
摘要:
A method for forming a semiconductor device utilizing a chemical-mechanical polishing (CMP) process is provided. In one example, the method includes sequentially performing a first CMP process for removing a first portion of an oxide surface of a semiconductor device using a high selectivity slurry (HSS) and a first polish pad, interrupting the first CMP process, cleaning the semiconductor device and the first polish pad, and performing a second CMP process for removing a second portion of the oxide surface.
摘要:
A shallow trench isolation (STI) structure and method of forming the same with reduced stress to improve charge mobility the method including providing a semiconductor substrate comprising at least one patterned hardmask layer overlying the semiconductor substrate; dry etching a trench in the semiconductor substrate according to the at least one patterned hardmask layer; forming one or more liner layers to line the trench selected from the group consisting of silicon dioxide, silicon nitride, and silicon oxynitride; forming one or more layers of trench filling material comprising silicon dioxide to backfill the trench; carrying out at least one thermal annealing step to relax accumulated stress in the trench filling material; carrying out at least one of a CMP and dry etch process to remove excess trench filling material above the trench level; and, removing the at least one patterned hardmask layer.
摘要:
A method comprises measuring an RF voltage and ion current at a wafer during a plasma-enhanced deposition process, determining a sputter rate in response to the RF voltage and ion current measurements, detecting an abnormal condition in response to one of the RF voltage and ion current measurements, and sputter rate, and taking a corrective action in response to detecting an abnormal condition.