Abstract:
High performance thin-film, transistors entirely processed at temperatures not exceeding 150°C, using amorphous multi component dielectrics based on t.he mixture of high band gap and high dielectric constant ( K) materials are presented in this invention. The invention relates to the use of sputtered or ink jet printed mixed dielectric materials such as Ta2O5 with SiO2 or Al2O3 or HfO2 with SiO2 or Al2O3. These multicomponent dielectrics allow producing amorphous dielectrics to be introduced in high stable electronic devices with low leakage currents, while preserving a high dielectric constant. This results in producing thin film transistors with remarkable electrical properties, such as the ones produced based on Ga-In-Zn oxide as channel layers and where the dielectric was the combination of the mixture Ta2O5:SiO2, exhibiting field- effect mobility exceeding 35 cm2 V-1 s-1, close to 0 V turn- on voltage, on/off ratio higher than 106 and subthreshold slope below 0.24 V dec-1.
Abstract translation:本发明提出了使用基于高带隙和高介电常数(K)材料的混合物的非晶多组分电介质,在不超过150℃的温度下完全加工的高性能薄膜。 本发明涉及使用溅射或喷墨印刷的混合电介质材料,例如具有SiO 2或Al 2 O 3或HfO 2的Ta 2 O 5与SiO 2或Al 2 O 3。 这些多组分电介质允许产生非晶电介质,以便在具有低泄漏电流的高稳定电子器件中引入,同时保持高的介电常数。 这导致产生具有显着电性能的薄膜晶体管,例如基于Ga-In-Zn氧化物作为沟道层产生的薄膜晶体管,并且其中电介质是混合物Ta 2 O 5:SiO 2的组合,显示场效应迁移率超过35cm 2 V-1 s-1,接近0 V导通电压,开/关比高于106,亚阈值斜率低于0.24 V dec-1。
Abstract:
An object is to provide a semiconductor device including a semiconductor element which has favorable characteristics. A manufacturing method of the present invention includes the steps of: forming a first conductive layer which functions as a gate electrode over a substrate; forming a first insulating layer to cover the first conductive layer; forming a semiconductor layer over the first insulating layer so that part of the semiconductor layer overlaps with the first conductive layer; forming a second conductive layer to be electrically connected to the semiconductor layer; forming a second insulating layer to cover the semiconductor layer and the second conductive layer; forming a third conductive layer to be electrically connected to the second conductive layer; performing first heat treatment after forming the semiconductor layer and before forming the second insulating layer; and performing second heat treatment after forming the second insulating layer.
Abstract:
A process for depositing a thin film material on a substrate is disclosed, comprising simultaneously directing a series of gas flows from the output face of a delivery head of a thin film deposition system toward the surface of a substrate, and wherein the series of gas flows comprises at least a first reactive gaseous material, an inert purge gas, and a second reactive gaseous material, wherein the first reactive gaseous material is capable of reacting with a substrate surface treated with the second reactive gaseous material, wherein one or more of the gas flows provides a pressure that at least contributes to the separation of the surface of the substrate from the face of the delivery head. A system capable of carrying out such a process is also disclosed.
Abstract:
A method for depositing a high-k dielelectric coating onto a substrate, such as a semiconductor wafer, is provided. In one embodiment, the process is directed to forming a nitride layer on a substrate. In an alternative embodiment, the present invention is directed to forming a metal oxide or silicate on a semiconductor wafer. When forming a metal oxide or silicate, a passivation layer is first deposited onto the substrate.
Abstract:
Embodiments of the disclosure generally provide methods of forming a capacitor with high capacitance and low leakage as well as a good interface control for thin film transistor (TFT) applications. In one embodiment, a thin film transistor structure includes a capacitor formed in a thin film transistor device. The capacitor further includes a common electrode disposed on a substrate, a dielectric layer formed on the common electrode and a pixel electrode formed on the dielectric layer. An interface protection layer formed between the common electrode and the dielectric layer, or between the dielectric layer and the pixel electrode. A gate insulating layer fabricated by a high-k material may also be utilized in the thin film transistor structure.
Abstract:
In some embodiments a method of processing a substrate disposed atop a substrate support in a physical vapor deposition process chamber includes: (a) depositing a dielectric layer to a first thickness atop a first surface of the substrate via a physical vapor deposition process; (b) providing a first plasma forming gas to a processing region of the physical vapor deposition process chamber, wherein the first plasma forming gas comprises hydrogen but not carbon; (c) providing a first amount of bias power to a substrate support to form a first plasma from the first plasma forming gas within the processing region of the physical vapor deposition process chamber; (d) exposing the dielectric layer to the first plasma; and (e) repeating (a)-(d) to deposit the dielectric film to a final thickness.
Abstract:
Various embodiments provide improved processes and systems that produce a barrier layer with decreasing nitrogen concentration with the increase of film thickness. A barrier layer with decreasing nitrogen concentration with film thickness allows the end of barrier layer with high nitrogen concentration to have good adhesion with a dielectric layer and the end of barrier layer with low nitrogen concentration (or metal-rich) to have good adhesion with copper. An exemplary method of depositing a barrier layer on an interconnect structure is provided. The method includes (a) providing an atomic layer deposition environment, (b) depositing a barrier layer on the interconnect structure with a first nitrogen concentration during a first phase of deposition in the atomic layer deposition environment. The method further includes (c) continuing the deposition of the barrier layer on the interconnect structure with a second nitrogen concentration during a second phase deposition in the atomic layer deposition environment.