摘要:
A semiconductor device capable of suppressing the occurrence of a punch-through phenomenon is provided. A first n-type conductive layer (2′) is formed on a substrate (1′). A p-type conductive layer (3′) is formed thereon. A second n-type conductive layer (4′) is formed thereon. On the under surface of the substrate (1′), there is a drain electrode (13′) connected to the first n-type conductive layer (2′). On the upper surface of the substrate (1′), there is a source electrode (11′) in ohmic contact with the second n-type conductive layer (4′), and a gate electrode (12′) in contact with the first n-type conductive layer (2′), p-type conductive layer (3′), the second n-type conductive layer (4′) through an insulation film (21′). The gate electrode (12′) and the source electrode (11′) are alternately arranged. The p-type conductive layer (3′) includes In.
摘要:
Disclosed is an HJFET 110 which comprises: a channel layer 12 composed of InyGa1-yN (0≦y≦1); a carrier supply layer 13 composed of AlxGa1-xN (0≦x≦1), the carrier supply layer 13 being provided over the channel layer 12 and including at least one p-type layer; and a source electrode 15S, a drain electrode 15D and a gate electrode 17 which are disposed facing the channel layer 12 through the p-type layer, and provided over the carrier supply layer 13. The following relational expression is satisfied: 5.6×1011x
摘要翻译:公开了一种HJFET 110,其包括:由In y Ga 1-y N(0&lt; n 1; y&n 1; 1)构成的沟道层12; 载体供给层13由Al x Ga 1-x N(0&lt; n 1; x&n 1; 1)组成,载流子供给层13设置在沟道层12上并且包括至少一个p型层; 以及源极电极15S,漏极电极15D和栅极电极17,其通过p型层面对沟道层12,并且设置在载流子供给层13上。满足以下关系式:5.6×10 11× NA×&eegr×T [cm-2] <5.6×1013x,其中x表示载流子供应层的Al组成比,t表示p型层的厚度,NA表示杂质浓度,&eegr; 表示活化比。
摘要:
In a group III nitride-type field effect transistor, the present invention reduces a leak current component by conduction of residual carriers in a buffer layer, and achieves improvement in a break-down voltage, and enhances a carrier confinement effect (carrier confinement) of a channel to improve pinch-off characteristics (to suppress a short channel effect). For example, when applying the present invention to a GaN-type field effect transistor, besides GaN of a channel layer, a composition-modulated (composition-gradient) AlGaN layer in which aluminum composition reduces toward a top gradually or stepwise is used as a buffer layer (hetero buffer). To gate length Lg of a FET to be prepared, a sum a of layer thicknesses of an electron supply layer and a channel layer is selected so as to fulfill Lg/a≧5, and in such a case, the layer thickness of the channel layer is selected in a range of not exceeding 5 times (about 500 Å) as long as a de Broglie wavelength of two-dimensional electron gas accumulated in the channel layer in room temperature.
摘要翻译:在III族氮化物型场效应晶体管中,本发明通过缓冲层中的残留载流子的传导来减少漏电流成分,并且可以实现击穿电压的提高,并提高载流子限制效应(载流子限制) 提高夹断特性的通道(抑制短路效应)。 例如,当将本发明应用于GaN型场效应晶体管时,除了沟道层的GaN之外,使用其中铝组成逐渐或逐步朝向顶部的组分调制(组成梯度)AlGaN层用作 缓冲层(杂质缓冲液)。 对于要制备的FET的栅极长度Lg,选择电子供给层和沟道层的层厚度的和a以满足Lg / a> = 5,并且在这种情况下, 在不超过5倍(约500)的范围内选择通道层,只要在室温下积聚在通道层中的二维电子气的德布罗意波长即可。
摘要:
In a group III nitride-type field effect transistor, the present invention reduces a leak current component by conduction of residual carriers in a buffer layer, and achieves improvement in a break-down voltage, and enhances a carrier confinement effect (carrier confinement) of a channel to improve pinch-off characteristics (to suppress a short channel effect). For example, when applying the present invention to a GaN-type field effect transistor, besides GaN of a channel layer, a composition-modulated (composition-gradient) AlGaN layer in which aluminum composition reduces toward a top gradually or stepwise is used as a buffer layer (hetero buffer). To gate length Lg of a FET to be prepared, a sum a of layer thicknesses of an electron supply layer and a channel layer is selected so as to fulfill Lg/a≧5, and in such a case, the layer thickness of the channel layer is selected in a range of not exceeding 5 times (about 500 Å) as long as a de Broglie wavelength of two-dimensional electron gas accumulated in the channel layer in room temperature.
摘要:
Disclosed is an HJFET 110 which comprises: a channel layer 12 composed of InyGa1-yN (0≦y≦1); a carrier supply layer 13 composed of AlxGa1-xN (0≦x≦1), the carrier supply layer 13 being provided over the channel layer 12 and including at least one p-type layer; and a source electrode 15S, a drain electrode 15D and a gate electrode 17 which are disposed facing the channel layer 12 through the p-type layer, and provided over the carrier supply layer 13. The following relational expression is satisfied: 5.6×1011x
摘要翻译:公开了一种HJFET 110,其包括:由In y Ga 1-y N(0 @ y 1)组成的沟道层12; 由Al x Ga 1-x N(0 @ x 1)构成的载流子供给层13,载流子供给层13设置在沟道层12上并且包括至少一个p型层; 以及源极电极15S,漏极电极15D和栅极电极17,其通过p型层面对沟道层12,并且设置在载流子供给层13上。满足以下关系式:5.6×10×11× NA×eta×t [cm-2] <5.6×1013x,其中x表示载体供给层的Al组成比,t表示所述p型层的厚度,NA表示杂质浓度,eta表示活化 比。
摘要:
A semiconductor device capable of suppressing the occurrence of a punch-through phenomenon is provided. A first n-type conductive layer (2′) is formed on a substrate (1′). A p-type conductive layer (3′) is formed thereon. A second n-type conductive layer (4′) is formed thereon. On the under surface of the substrate (1′), there is a drain electrode (13′) connected to the first n-type conductive layer (2′). On the upper surface of the substrate (1′), there is a source electrode (11′) in ohmic contact with the second n-type conductive layer (4′), and a gate electrode (12′) in contact with the first n-type conductive layer (2′), p-type conductive layer (3′), the second n-type conductive layer (4′) through an insulation film (21′). The gate electrode (12′) and the source electrode (11′) are alternately arranged. The p-type conductive layer (3′) includes In.
摘要:
A semiconductor device includes a lower barrier layer 12 composed of a layer of AlxGa1-xN (0≦x≦1) in a state of strain relaxation, and a channel layer 13, which is composed of a layer of InyGa1-yN (0≦y≦1) disposed on the lower barrier layer 12, has band gap that is smaller than band gap of the lower barrier layer 12, and exhibits compressive strain. A gate electrode 1G is formed over the channel layer 13 via an insulating film 15 and a source electrode 1S and a drain electrode 1D serving as ohmic electrodes are formed over the channel layer 13. The insulating film 15 is constituted of polycrystalline or amorphous member.
摘要翻译:半导体器件包括在应变松弛的状态下由Al x Ga 1-x N(0&amp; nlE; x&nlE; 1)层构成的下阻挡层12,以及由In y Ga 1-y N(0&lt; nlE; 1)层组成的沟道层13。 y); 1)设置在下阻挡层12上,具有小于下阻挡层12的带隙的带隙,并且表现出压缩应变。 在沟道层13上经由绝缘膜15形成栅极电极1G,在沟道层13上形成有用作欧姆电极的源电极1S和漏电极1D。绝缘膜15由多晶或非晶构成。
摘要:
Provided is a semiconductor device capable of suppressing an occurrence of a punch-through phenomenon.A semiconductor device includes a substrate 1, a first n-type semiconductor layer 2, a p-type semiconductor layer 3, a second n-type semiconductor layer 4, a drain electrode 13, a source electrode 11, a gate electrode 12, and a gate insulation film 21, wherein the first n-type semiconductor layer 2, the p-type semiconductor layer 3, and the second n-type semiconductor layer 4 are laminated on the substrate 1 in this order. The drain electrode 13 is in ohmic-contact with the first n-type semiconductor layer 2. The source electrode 11 is in ohmic-contact with the second n-type semiconductor layer 4. An opening portion to be filled or a notched portion that extends from an upper surface of the second n-type semiconductor layer 4 to an upper part of the first n-type semiconductor layer 2 is formed at a part of the p-type semiconductor layer 3 and a part of the second n-type semiconductor layer 4. The gate electrode 12 is in contact with an upper surface of the first n-type semiconductor layer 2, side surfaces of the p-type semiconductor layer 3, and side surfaces of the second n-type semiconductor layer 4 at inner surfaces of the opening portion to be filled or a surface of the notched portion via the gate insulation film 21. The p-type semiconductor layer 3 has a positive polarization charge at a first n-type semiconductor layer 2 side in a state where a voltage is applied to none of the electrodes.
摘要:
A heterojunction filed effect transistor with a low access resistance, a low on resistance, and the like, a method for producing a heterojunction filed effect transistor and an electron device are provided. In the heterojunction field effect transistor, an electron transit layer 11 formed of a III-nitride semiconductor is formed on a substrate 10, an electron supply layer 12 formed of a III-nitride semiconductor forms a heterojunction with an upper surface of the electron transit layer 11, a gate electrode 14, a source electrode 15A, and a drain electrode 15B are arranged on the electron supply layer 12, n-type conductive layer regions 13A and 13B each extended from an upper part of the electron transit layer 11 to an upper surface of the electron supply layer 12 are provided in at least a part below the source electrode 15A and a part below the drain electrode 15B, and an n-type impurity concentration at a heterojunction interface of an electron transit layer 11 part of each of the n-type conductive layer regions 13A and 13B with the electron supply layer 12 is 1×1020 cm−3 or more.
摘要:
Provided is a semiconductor device that can reduce the contact resistance, has a small current collapse, and can improve the pinch-off characteristic upon a high-frequency operation. A field effect transistor using a wurtzite (having (0001) as the main plane) type III-nitride semiconductor includes: a substrate (101); an undercoat layer (103) of a first III-nitride semiconductor; and a carrier travel layer (104) of a second III-nitride semiconductor. The undercoat layer (103) (101) and the carrier travel layer (104) is formed on the substrate in this order. The field effect transistor includes source/drain electrodes (105, 106) in ohmic contact, and a gate electrode (107) in Schottky contact directly or via another layer on the carrier travel layer (104). The undercoat layer (103) has an average lattice constant greater than that of the carrier travel layer (104) and a band gap greater than that of the carrier travel layer (104).