Abstract:
The invention provides a single-step method for removing bulk metal contamination from III-V semiconductor substrates. The method comprises immersing a metal contaminated III-V semiconductor substrate in a mixture of sulfuric acid and peroxide with a volume ratio of sulfuric acid to peroxide (e.g., hydrogen peroxide) between about 3:1 and about 9:1. After treating the III-V semiconductor substrates with the sulfuric acid-peroxide mixture, the bulk metal contamination may be substantially removed from the substrate while a surface roughness of the substrate after treatment of below about 0.5 nm RMS (2 μm×2 μm) is obtained. The invention further provides a method for manufacturing a semiconductor device by removing bulk metal contamination according to the single-step method of the invention before performing processing steps for forming the semiconductor device.
Abstract:
The invention provides a single-step method for removing bulk metal contamination from III-V semiconductor substrates. The method comprises immersing a metal contaminated III-V semiconductor substrate in a mixture of sulfuric acid and peroxide with a volume ratio of sulfuric acid to peroxide (e.g., hydrogen peroxide) between about 3:1 and about 9:1. After treating the III-V semiconductor substrates with the sulfuric acid-peroxide mixture, the bulk metal contamination may be substantially removed from the substrate while a surface roughness of the substrate after treatment of below about 0.5 nm RMS (2 μm×2 μm) is obtained. The invention further provides a method for manufacturing a semiconductor device by removing bulk metal contamination according to the single-step method of the invention before performing processing steps for forming the semiconductor device.
Abstract translation:本发明提供了用于从III-V半导体衬底去除体金属污染的单步方法。 该方法包括将金属污染的III-V半导体衬底浸入硫酸与过氧化物的混合物中,硫酸与过氧化物(例如过氧化氢)的体积比在约3:1至约9:1之间。 在用硫酸过氧化物混合物处理III-V半导体衬底之后,可以从衬底基本上除去体金属污染物,同时获得处理后的衬底的表面粗糙度低于约0.5nm RMS(2m 2 x 2 mum)。 本发明还提供一种在形成半导体器件的处理步骤之前,通过根据本发明的单步方法去除大块金属污染来制造半导体器件的方法。
Abstract:
The aim of the invention is to attain a uniform and homogeneous treatment of substrates in a device comprising at least one process container which is arranged in a gas atmosphere and which contains a treatment fluid. Said process container also comprises at least two openings which are located underneath a treatment fluid surface and through which the substrates are linearly guided. In addition, an overflow for the treatment fluid is provided.
Abstract:
A quantum well device and a method for manufacturing the same are disclosed. In one aspect, the device includes a quantum well region overlying a substrate, a gate region overlying a portion of the quantum well region, a source and drain region adjacent to the gate region. The quantum well region includes a buffer structure overlying the substrate and including semiconductor material having a first band gap, a channel structure overlying the buffer structure including a semiconductor material having a second band gap, and a barrier layer overlying the channel structure and including an un-doped semiconductor material having a third band gap. The first and third band gap are wider than the second band gap. Each of the source and drain region is self-aligned to the gate region and includes a semiconductor material having a doped region and a fourth band gap wider than the second band gap.
Abstract:
A semiconductor device is disclosed. In one aspect, the device comprises a channel area, the channel area comprising a channel layer in which charge carriers can move when the transistor is turned on, in order to pass a current through the transistor. The device further comprises a source area and a drain area contacting the channel layer for providing current to and from the channel layer. The method further comprises a gate electrode, preferably provided with a gate dielectric between the gate electrode and the channel layer. The channel layer may comprise a III-V material, and the source and drain areas comprise SiGe, being SixGe1-x, with x between 0 and 100%, arranged so that heterojunctions are present between III-V material and SiGe, wherein the heterojunctions are oriented so as to intersect with the gate dielectric or the gate electrode.
Abstract:
The present invention is related to a method for making a passivated semiconductor substrate comprising the steps of providing a substrate surface comprising or consisting of mono-crystalline semiconductor material other than silicon and forming a silicon layer on the substrate surface, such that the silicon layer is substantially lattice matched to the mono-crystalline semiconductor material. It is also related to a semiconductor substrate passivated according to the method.
Abstract:
The present invention is related to the field of semiconductor processing and, more particularly, to the formation of low resistance layers on germanium substrates. One aspect of the present invention is a method comprising: providing a substrate on which at least one area of a germanium layer is exposed; depositing over the substrate and said germanium area a metal, e.g., Co or Ni; forming over said metal, a capping layer consisting of a silicon oxide containing layer, of a silicon nitride layer, or of a tungsten layer, preferably of a SiO2 layer; then annealing for metal-germanide formation; then removing selectively said capping layer and any unreacted metal, wherein the temperature used for forming said capping layer formation is lower than the annealing temperature.
Abstract:
A quantum well device and a method for manufacturing the same are disclosed. In one aspect, the device includes a quantum well region overlying a substrate, a gate region overlying a portion of the quantum well region, a source and drain region adjacent to the gate region. The quantum well region includes a buffer structure overlying the substrate and including semiconductor material having a first band gap, a channel structure overlying the buffer structure including a semiconductor material having a second band gap, and a barrier layer overlying the channel structure and including an un-doped semiconductor material having a third band gap. The first and third band gap are wider than the second band gap. Each of the source and drain region is self-aligned to the gate region and includes a semiconductor material having a doped region and a fourth band gap wider than the second band gap.
Abstract:
The present invention is related to a method and apparatus for liquid treating and drying a substrate, such as a semiconductor wafer, the method comprising the step of immersing a substrate or a batch of substrates in a tank filled with a liquid, and removing the substrate(s) through an opening so that a flow of the liquid takes place through the opening during removal of the substrate. Simultaneously with the removal, a reduction of the surface tension of the liquid is caused to take place near the intersection line between the liquid and the substrate. For acquiring such a tensio-active effect, a uniform flow of a gas or vapor is used, or/and a local application of heat. The invention is equally related to an apparatus for performing the method of the invention.
Abstract:
An apparatus for wet cleaning or etching of flat substrates comprising a tank with an inlet opening and outlet opening for said substrates. Said tank contains a cleaning liquid and is installed in a gaseous environment. At least one of the openings is a slice in a sidewall of the tank and is present below the liquid-surface. In the tank there may be a portion above the liquid filled with a gas with a pressure being lower than the pressure within said environment. The method comprises the step of transferring a substrate through the cleaning or etching liquid at a level underneath the surface of said liquid making use of said apparatus.