摘要:
The invention concerns a multilayer structure with controlled internal stresses comprising successively: a first main layer (110a), at least a first stress-adapting layer (130) in contact with the first main layer, at least a second stress-adapting layer (120) placed in contact by adherence with said first stress-adapting layer and a second main layer (110b) in contact with the second stress-adapting layer, the first and second stress-adapting layers having contact stresses with the first and second main layers. The invention is useful for electronic circuits and diaphragm devices.
摘要:
A method for integrating III-V semiconductor materials onto a rigid host substrate deposits a thin layer of reactive metal film on the rigid host substrate. The layer can also include a separation layer of unreactive metal or dielectric, and can be patterned. The unreactive metal pattern can create self-aligned device contacts after bonding is completed. The III-V semiconductor material is brought into contact with the thin layer of reactive metal. Bonding is by a low temperature heat treatment under a compressive pressure. The reactive metal and the functional semiconductor material are selected to undergo solid state reaction and form a stable alloy under the low temperature heat treatment without degrading the III-V material. A semiconductor device of the invention includes a functional III-V layer bonded to a rigid substrate via an alloy of a component of the functional III-V layer and a metal that bonds to the rigid substrate.
摘要:
A device substrate suitable for forming a group III - N semiconductor device, the device substrate comprises a crystalline silicon wafer (100), an optional layer of CVD 3C-SiC (105) of thickness 50-1000 nm formed over the silicon substrate, a layer (110) of AIN of thickness 10-250 nm formed over the silicon substrate, or over the 3C-SiC layer when used, a buffer layer (115) formed of a plurality of films selected from the group of GaN, AIN and Al x Ga (1-X) N (0 x Ga (1-X) N (0.4>x>0.2) is formed over the buffer layer. A passivation layer (130) of GaN layer or silicon nitride layer may be deposited over the barrier layer. The layer are deposited in the MOCVD chamber.
摘要翻译:一种适于形成III-N族半导体器件的器件衬底,器件衬底包括晶体硅晶片(100),在硅衬底上形成厚度为50-1000nm的任选的CVD 3C-SiC(105)层, 在硅衬底上形成的厚度为10-250nm的AIN层(110),或者当使用时在3C-SiC层上方形成由多个选自GaN,AlN和Al x Ga的膜形成的缓冲层(115) (1-X)N(0 x> 0.2)的势垒(电子供给)层(125)。 可以在阻挡层上沉积GaN层或氮化硅层的钝化层(130)。 该层沉积在MOCVD室中。
摘要:
The invention concerns a method for electrically conductive bonding between a surface of a first semiconductor element (10) and a surface of a second semiconductor element (12) using heat treatment. The method consists in: pressing said surfaces against each other with at least an intermediate layer (11, 15, 16, 13) of a material designed to ensure, after the heat treatment, an electrically conductive bonding between the two surfaces, the deposited layers being selected so that the heat treatment does not cause a reaction product between said material and the semiconductor elements (10, 12); then in carrying out the heat treatment. For example, the first and second semiconductor elements (10, 12) are SiC, the intermediate layer comprising a tungsten film (11, 13) and a silicon film (15, 16), the resulting mixture (14) comprising WSi2.
摘要:
Le procédé comprend les étapes suivantes: a)Fournir des briques (1) destinées à être assemblées pour former au moins un assemblage, les briques (1) comportant des surfaces d'assemblage, b)Former des couches d'isolation électrique (3) de sorte à recouvrir les surfaces d'assemblage des briques (1), c)Former une couche de conduction électrique (4) entre les couches d'isolation électrique (3) de sorte à assembler des briques (1) voisines selon un plan d'assemblage et à former au moins un assemblage (5),ladite couche de conduction électrique (4) présentant une résistivité électrique inférieure ou égale à 10 -4 ohm.cm. d)Soumettre l'au moins un assemblage (5) à un traitement thermique, et e)Découper l'au moins un assemblage (5) selon un plan perpendiculaire au plan d'assemblage, l'au moins un assemblage (5) découpé formant un pavage de briques (1) découpées. L'invention concerne également un substrat composite obtenu par ledit procédé.
摘要:
Semiconductor devices including a subfin including a first III-V compound semiconductor and a channel including a second III-V compound semiconductor are described. In some embodiments the semiconductor devices include a substrate including a trench defined by at least two trench sidewalls, wherein the first III-V compound semiconductor is deposited on the substrate within the trench and the second III-V compound semiconductor is epitaxially grown on the first III-V compound semiconductor. In some embodiments, a conduction band offset between the first III-V compound semiconductor and the second III-V compound semiconductor is greater than or equal to about 0.3 electron volts. Methods of making such semiconductor devices and computing devices including such semiconductor devices are also described.
摘要:
A semiconductor-on-glass substrate having a relatively stiff (e.g. relatively high Young's modulus of 125 or higher) stiffening layer or layers placed between the silicon film and the glass in order to eliminate the canyons and pin holes that otherwise form in the surface of the transferred silicon film during the ion implantation thin film transfer process. The new stiffening layer may be formed of a material, such as silicon nitride, that also serves as an efficient barrier against penetration of sodium and other harmful impurities from the glass substrate into the silicon film.
摘要:
The invention concerns a method for producing microstructures or nanostructures on a support, comprising the following steps: contacting one surface of a first wafer (1) in crystalline material with a surface of a second wafer (2) in crystalline material, so that the two crystalline lattices of said surfaces have at least one misalignment parameter for forming a crystalline fault network (6) and/or a stress network within the crystalline zone (8) extending on either side of the interface of the two wafers, at least one of said networks defining a microstructure or a nanostructure; thinning one (1) of the two wafers to expose the fault network and/or the stress network on a support (10) constituted by the other wafer.
摘要:
A quasi-vertical Schottky diode architecture includes a topside anode contact that connects to external circuitry through an airbridge finger, a thin mesa of semiconductor material with epilayers including a bottomside highly-doped layer, a bottomside ohmic contact directly below the anode, and a host substrate onto which the diode material is bonded by a thin adhesive layer. A method of fabricating the diode architecture includes preparation of the semiconductor wafer for processing (including initial etching to expose the highly-doped epilayer, deposition of metals and annealing to form the ohmic contact, application of the adhesive layer to the host substrate, thermal compression bonding of diode wafer and host wafer, with ohmic contact side facing host wafer to form a composite wafer, etching and formation of diode mesas to isolate devices on the host substrate, lithography and formation of topside anode contact and external circuitry on host wafer).