摘要:
A method for manufacturing a III-V CMOS device is disclosed. The device includes a first and second main contact and a control contact. In one aspect, the method includes providing the control contact by using damascene processing. The method thus allows obtaining a control contact with a length of between about 20 nm and 5 μm and with good Schottky behavior. Using low-resistive materials such as Cu allows reducing the gate resistance thus improving the high-frequency performance of the III-V CMOS device.
摘要:
A method is disclosed for producing Group III-N field-effect devices, such as HEMT, MOSHFET, MISHFET or MESFET devices, comprising two active layers, e.g. a GaN/AlGaN layer. The method produces an enhancement mode device of this type, i.e. a normally-off device, by providing a passivation layer on the AlGaN layer, etching a hole in the passivation layer and not in the layers underlying the passivation layer, and depositing the gate contact in the hole, while the source and drain are deposited directly on the passivation layer. The characteristics of the active layers and/or of the gate are chosen such that no two-dimensional electron gas layer is present underneath the gate, when a zero voltage is applied to the gate. A device with this behavior is also disclosed.
摘要翻译:公开了用于生产III-N族场效应器件的方法,例如HEMT,MOSHFET,MISHFET或MESFET器件,包括两个有源层, GaN / AlGaN层。 该方法通过在AlGaN层上提供钝化层,蚀刻钝化层中的孔而不是在钝化层下面的层中产生这种类型的增强型器件,即常关器件,并沉积栅极接触 在孔中,源极和漏极直接沉积在钝化层上。 选择有源层和/或栅极的特性,使得当将零电压施加到栅极时,在栅极下方不存在二维电子气层。 还公开了具有这种行为的装置。
摘要:
Disclosed are methods of growing III-V epitaxial layers on a substrate, semiconductor structures thus obtained, and devices comprising such semiconductor structures. An example semiconductor substrate includes a substrate and a buffer layer on top of the substrate, where a conductive path is present between the substrate and buffer layer. A conductive path may be present in the conductive interface, and the conductive path may be interrupted by one or more local electrical isolations. The local electrical isolation(s) may be positioned with the device such that at least one of the local electrical isolation(s) is located between a high voltage terminal and a low voltage terminal of the device.
摘要:
The present invention recites a new method for manufacturing Group III-N field-effect devices, such as HEMT, MOSHFET, MISHFET devices or MESFET devices, grown by Metal-Organic Vapor Phase Expitaxy, with higher performance (power), by covering the surface with a thin SiN layer on the top AlGaN layer, in the reactor where the growth takes place at high temperature, prior cooling down the structure and loading the sample out of the reactor, as well as a method to produce some HEMT transistors on those heterostructures, by depositing the contact on the surface without any removal of the SiN layer by MOCVD. The present invention recites also a device.
摘要:
A semiconductor device is disclosed. In one aspect, the device has a first and second active layer on a substrate, the second active layer having a higher bandgap than the first active layer, being substantially Ga-free and including at least Al−. The device has a gate insulating layer on a part of the second active layer formed by thermal oxidation of a part of the second active layer. The device has a gate electrode on at least a part of the gate insulating layer and a source electrode and drain electrode on the second active layer. The device has, when in operation and when the gate and source electrode are at the same voltage, a two-dimensional electron gas layer between the first and second active layer only outside the location of the gate electrode and not at the location of the gate electrode.
摘要:
The present invention recites a new method for manufacturing Group III-N field-effect devices, such as HEMT, MOSHFET, MISHFET devices or MESFET devices, grown by Metal-Organic Vapor Phase Expitaxy, with higher performance (power), by covering the surface with a thin SiN layer on the top AlGaN layer, in the reactor where the growth takes place at high temperature, prior cooling down the structure and loading the sample out of the reactor, as well as a method to produce some HEMT transistors on those heterostructures, by depositing the contact on the surface without any removal of the SiN layer by MOCVD. The present invention recites also a device.
摘要:
Disclosed are methods of growing III-V epitaxial layers on a substrate, a semiconductor structure comprising a substrate, a device comprising such a semiconductor structure, and an electronic circuit. Group III-nitride devices, such as, for example, high-electron-mobility transistors, may include a two-dimensional electron gas (2DEG) between two active layers. For example, the 2DEG may be between a GaN layer and a AlGaN layer. These transistors may work in depletion-mode operation, which means the channel has to be depleted to turn the transistor off. For certain applications, such as, for example, power switching or integrated logic, negative polarity gate supply is undesired. Transistors may then work in enhancement mode (E-mode).
摘要:
A method for manufacturing a III-V CMOS device is disclosed. The device includes a first and second main contact and a control contact. In one aspect, the method includes providing the control contact by using damascene processing. The method thus allows obtaining a control contact with a length of between about 20 nm and 5 μm and with good Schottky behavior. Using low-resistive materials such as Cu allows reducing the gate resistance thus improving the high-frequency performance of the III-V CMOS device.
摘要:
In the preferred embodiments, a method to reduce gate leakage and dispersion of group III-nitride field effect devices covered with a thin in-situ SiN layer is provided. This can be obtained by introducing a second passivation layer on top of the in-situ SiN-layer, in combination with cleaning of the in-situ SiN before gate deposition and before deposition of the second passivation layer.
摘要:
In the preferred embodiments, a method to reduce gate leakage and dispersion of group III-nitride field effect devices covered with a thin in-situ SiN layer is provided. This can be obtained by introducing a second passivation layer on top of the in-situ SiN-layer, in combination with cleaning of the in-situ SiN before gate deposition and before deposition of the second passivation layer.