摘要:
A method of forming a III-V compound semiconductor structure (10) comprises providing a III-V compound semiconductor substrate including a semi-insulating substrate (12) having at least one epitaxial layer formed thereon and further having a gate insulator (14) overlying the at least one epitaxial layer. The at least one epitaxial layer formed on the semi-insulating substrate comprises an epi-structure suitable for use in the formation of a channel of a III-V compound semiconductor MOSFET device, wherein the channel (30) having a first polarity. The method further comprises forming a charge layer (22) at a surface of the gate insulator, the charge layer having a second polarity, wherein the second polarity is opposite to the first polarity.
摘要:
A semiconductor fabrication process includes forming a gate dielectric layer (120) overlying a substrate (101) that includes a III-V semiconductor compound. The gate dielectric layer is patterned to produce a gate dielectric structure (121) that has a substantially vertical sidewall (127), e.g., a slope of approximately 45° to 90°. A metal contact structure (130) is formed overlying the wafer substrate. The contact structure is laterally displaced from the gate dielectric structure sufficiently to define a gap (133) between the two. The wafer (100) is heat treated, which causes migration of at least one of the metal elements to form an alloy region (137) in the underlying wafer substrate. The alloy region underlies the contact structure and extends across all or a portion of the wafer substrate underlying the gap. An insulative or dielectric capping layer (140,150) is then formed overlying the wafer and covering the portion of the substrate exposed by the gap.
摘要:
Method and apparatus are described for semiconductor devices. The method (100) comprises, providing a partially completed semiconductor device (31-1) including a substrate (21), a semiconductor (22) on the substrate (21) and a passivation layer (25) on the semiconductor (22), and using a first mask (32), locally etching the passivation layer (25) to expose a portion (36) of the semiconductor (22), and without removing the first mask (32) forming a Schottky contact (42-1) of a first material on the exposed portion (36) of the semiconductor (22), then removing the first mask (32) and using a further mask (44), forming a step-gate conductor (48-1) of a second material electrically coupled to the Schottky contact (42-1) and overlying parts (25-1) of the passivation layer (25) adjacent to the Schottky contact (42-1). By minimizing the process steps between opening the Schottky contact window (35) in the passivation layer (25) and forming the Schottky contact (42-1) material in this window (35), the gate leakage of a resulting field effect device (51-5) having a Schottky gate (42-1) is substantially reduced.
摘要:
A complementary metal-oxide-semiconductor field effect transistor structure includes ion implants in only one of the two complementary devices. The transistor structure generally includes a compound semiconductor substrate and an epitaxial layer structure that includes one or more donor layers that establish a conductivity type for the epitaxial layer structure. The ion implants function to “invert” or “reverse” the conductivity type of the epitaxial layer structure in one of the complementary devices. In the example embodiment, p-type acceptor implants are utilized in the p-channel device, while the n-channel device remains implant-free.
摘要:
In one embodiment, a semiconductor device (500) includes a buffer layer (504) formed over a substrate (502). An AlxGa1-xAs layer (506) is formed over the buffer layer (504) and has a first doped region (508) formed therein. An InxGa1-xAs channel layer (512) is formed over the AlxGa1-xAs layer (506). An AlxGa1-xAs layer (518) is formed over the InxGa1-xAs channel layer (512), and the AlxGa1-xAs layer (518) has a second doped region formed therein. A GaAs layer (520) having a first recess is formed over the AlxGa1-xAs layer (518). A control electrode (526) is formed over the AlxGa1-xAs layer (518). A doped GaAs layer (524) is formed over the undoped GaAs layer (520) and on opposite sides of the control electrode (526) and provides first and second current electrodes. When used to amplify a digital modulation signal, the semiconductor device (500) maintains linear operation over a wide temperature range.
摘要翻译:在一个实施例中,半导体器件(500)包括形成在衬底(502)上的缓冲层(504)。 在缓冲层(504)之上形成Al x Ga 1-x As层(506),并且在其中形成有第一掺杂区域(508)。 在Al x Ga 1-x SUB>上形成一个In 1 / x Ga 1-x As As沟道层(512) >作为层(506)。 在In 1 x 1 Ga 1-x N上形成Al x Ga 1-x As层(518) 作为沟道层(512)和Al x Ga 1-x As层(518)具有形成在其中的第二掺杂区域。 具有第一凹陷的GaAs层(520)形成在Al 1 Ga 1-x As层(518)上。 控制电极(526)形成在Al 1 Ga 1-x As As层(518)上。 在未掺杂的GaAs层(520)上和控制电极(526)的相对侧上形成掺杂GaAs层(524),并提供第一和第二电流电极。 当用于放大数字调制信号时,半导体器件(500)在宽的温度范围内保持线性操作。
摘要:
An insulator-compound semiconductor interface structure is disclosed including compound semiconductor material with a spacer layer of semiconductor material having a bandgap which is wider than the bandgap of the compound semiconductor material positioned on a surface of the compound semiconductor material and an insulating layer positioned on the spacer layer. Minimum and maximum thicknesses of the spacer layer are determined by the penetration of the carrier wave function into the spacer layer and by the desired device performance. In a specific embodiment, the interface structure is formed in a multi-wafer epitaxial production system including a transfer and load module with a III-V growth chamber attached and an insulator chamber attached.
摘要:
A method of forming a stable semiconductor device on an at least partially completed semiconductor device including a supporting semiconductor structure of III-V material having a clean and atomically ordered surface to be coated with a dielectric layer structure. A relatively thin layer of Ga.sub.2 O.sub.3 is deposited on the surface by evaporation using a high purity single crystal of material including Ga.sub.2 O.sub.3 and a second oxide, such as MgO or Gd.sub.2 O.sub.3. A second layer of material with low bulk trap density relative to the Ga.sub.2 O.sub.3 is deposited on the layer of Ga.sub.2 O.sub.3 to complete the dielectric layer structure.
摘要翻译:在至少部分完成的半导体器件上形成稳定的半导体器件的方法,该半导体器件包括III-V族材料的支撑半导体结构,该半导体器件具有要涂覆介电层结构的干净且原子序列的表面。 通过使用包括Ga 2 O 3和诸如MgO或Gd 2 O 3的第二氧化物的高纯度单晶的蒸发,在表面上沉积相对薄的Ga 2 O 3层。 相对于Ga 2 O 3具有低体积陷阱密度的第二层材料沉积在Ga 2 O 3层上以完成介电层结构。
摘要:
Disclosed is a method of fabricating a stoichiometric gallium oxide (Ga.sub.2 O.sub.3) thin film with dielectric properties on at least a portion of a semiconducting, insulating or metallic substrate. The method comprises electron-beam evaporation of single crystal, high purity Gd.sub.3 Ga.sub.5 O.sub.12 complex compound combining relatively ionic oxide, such as Gd.sub.2 O.sub.3, with the more covalent oxide Ga.sub.2 O.sub.3 such as to deposit a uniform, homogeneous, dense Ga.sub.2 O.sub.3 thin film with dielectric properties on a variety of said substrates, the semiconducting substrates including III-V and II-VI compound semiconductors.
摘要翻译:公开了一种在半导体,绝缘或金属基底的至少一部分上制造具有介电特性的化学计量的氧化镓(Ga 2 O 3)薄膜的方法。 该方法包括电子束蒸发单晶,高纯Gd3Ga5O12复合化合物,将相对离子氧化物(如Gd2O3)与较多共价氧化物Ga2O3结合,以沉积均匀,均匀致密的Ga2O3薄膜,具有介电性能 的所述衬底,所述半导体衬底包括III-V和II-VI化合物半导体。
摘要:
A tunnel field-effect transistor (TFET) includes a gate electrode, a source region, and a drain region. The source and drain regions are of opposite conductivity types. A channel region is disposed between the source region and the drain region. A source diffusion barrier is disposed between the channel region and the source region. The source diffusion barrier and the source region are under and overlapping the gate electrode. The source diffusion barrier has a first bandgap greater than second bandgaps of the source region, the drain region, and the channel region.
摘要:
A Fin Field-Effect Transistor (FinFET) includes a fin, which includes a channel splitter having a first bandgap, and a channel including a first portion and a second portion on opposite sidewalls of the channel splitter. The channel has a second bandgap smaller than the first bandgap. A gate electrode includes a first portion and a second portion on opposite sides of the fin. A gate insulator includes a first portion between the first portion of the gate electrode and the first portion of the channel, and a second portion between the second portion of the gate electrode and the second portion of the channel.