Abstract:
A semiconductor structure having compound semiconductor (CS) device formed in a compound semiconductor of the structure and an elemental semiconductor device formed in an elemental semiconductor layer of the structure. The structure includes a layer having an elemental semiconductor device is disposed over a buried oxide (BOX) layer. A selective etch layer is disposed between the BOX layer and a layer for a compound semiconductor device. The selective etch layer enables selective etching of the BOX layer to thereby maximize vertical and lateral window etch process control for the compound semiconductor device grown in etched window. The selective etch layer has a lower etch rate than the etch rate of the BOX layer.
Abstract:
A semiconductor structure, comprising: a substrate; a first aluminum nitride (AlN) layer having an aluminum/reactive nitride (Al/N) flux ratio less than 1 disposed on the substrate; and a second AlN layer having an Al/reactive N flux ratio greater than 1 disposed on the first AlN layer. The substrate is a compound of silicon wherein the first AlN layer is substantially free of silicon.
Abstract:
A heterostructire having a heteroj unction comprising: a diamond layer; and a boron aluminum nitride (B(X)A1(|.X)N) layer disposed in contact with a surface of the diamond layer, where x is between 0 and 1.
Abstract:
A transistor structure having an gallium arsenide (GaAs) semiconductor substrate; an indium aluminum gallium arsenide (InAlGaAs) lattice match layer; an indium aluminum arsenide (InAlAs) barrier layer disposed over the lattice match layer; an In y Ga 1-y As lower channel layer disposed on the barrier layer, where y is the mole fraction of In content in the lower channel layer; an In x Ga 1-x As upper channel layer disposed on the lower channel layer, where x is the mole fraction of In content in the upper channel layer and where x is different from y; and an InAlAs Schottky layer on the In x Ga 1-x As upper channel layer. The lower channel layer has a bandgap greater that the bandgap of the upper channel layer and the lower channel layer has a bulk electron mobility lower than the bulk electron mobility of the upper channel layer.
Abstract:
A semiconductor structure having: a silicon substrate (12) having a crystallographic orientation; an insulating layer (18/22) disposed over the silicon substrate (12); a silicon layer (20) having a different crystallographic orientation than the crystallographic orientation of the substrate disposed over the insulating layer; and a column III-V transistor device (34) having the same crystallographic orientation as the substrate disposed on the silicon substrate. In one embodiment, the column III-V transistor device is in contact with the substrate. In other embodiments, the device is a GaN device or the crystallographic orientation of the substrate is and wherein the crystallographic orientation of the silicon layer is . In one embodiment, CMOS transistors are disposed in the silicon layer. In one embodiment, the column III-V transistor device is a column III-N device. In one embodiment, a column III-As, III-P, or III-Sb device is disposed on the top of the silicon layer.
Abstract:
A method for forming a structure on a surface of a semiconductor. The method includes: forming the material as a lower layer of the structure using a first deposition process to provide the lower layer with a first etch rate to a predetermined etchant; forming the upper layer of the structure with the material on the lower using a second deposition process to provide the upper layer with a second etch rate to the predetermined etchant higher than the first etch rate; and applying the predetermined etchant to upper layer to selectively remove the upper while leaving the lower layer.
Abstract:
A semiconductor structure having a III-V substrate; a first III-V donor layer having a relatively wide bandgap disposed over the substrate; a III-V channel layer having a relatively narrow bandgap disposed on the donor layer; a second III-V donor layer disposed on the channel layer having a relatively wide bandgap. The first III-V donor provides both tensile strain to compensate compressive strain in the channel layer and carriers to the channel layer.
Abstract:
A semiconductor structure, comprising: a substrate; a first aluminum nitride (AlN) layer having an aluminum/reactive nitride (Al/N) flux ratio less than 1 disposed on the substrate; and a second AlN layer having an Al/reactive N flux ratio greater than 1 disposed on the first AlN layer. The substrate is a compound of silicon wherein the first AlN layer is substantially free of silicon.
Abstract:
A semiconductor structure having: a column IV material or column IV-IV material; a nucleation layer of AlN layer or a column III nitride having more than 60% aluminum content on a surface of the column IV material or column IV-IV material and a layer of column III-V material over the nucleation layer, where the nucleation layer and the layer of column III-V material over the nucleation layer have different crystallographic structures. In one embodiment, the column III-V nucleation layer is a nitride and the column III- V material of the over the nucleation layer is a non-nitride such as, for example, an arsenide (e.g., GaAs), a phosphide (e.g., InP), or an antimonide (e.g. InSb), or alloys thereof.
Abstract:
Described herein is a liquid crystal (LC) device having Gallium Nitride HEMT electrodes. The Gallium Nitride HEMT electrodes can be grown on a variety of substrates, including but not limited to sapphire, silicon carbide, silicon, fused silica (using a calcium flouride buffer layer),and spinel. Also described is a structure provided from GaN HEMT grown on large area silicon substrates and transferred to another substrate with appropriate properties for OPA devices. Such substrates include, but are not limited to sapphire, silicon carbide, silicon, fused silica (using a calcium fluoride buffer layer),and spinel. The GaN HEMT structure includes an AlN interlayer for improving the mobility of the structure.
Abstract translation:这里描述的是具有氮化镓HEMT电极的液晶(LC)器件。 氮化镓HEMT电极可以在各种基底上生长,包括但不限于蓝宝石,碳化硅,硅,熔融二氧化硅(使用硅酸钙缓冲层)和尖晶石。 还描述了从在大面积硅衬底上生长的GaN HEMT提供的结构,并将其转移到具有用于OPA器件的适当性质的另一衬底。 这种衬底包括但不限于蓝宝石,碳化硅,硅,熔融二氧化硅(使用氟化钙缓冲层)和尖晶石。 GaN HEMT结构包括用于改善结构的迁移率的AlN夹层。