Abstract:
There is provided a technique that includes: providing a substrate including a conductive film and an insulating film on a surface of the substrate; and forming an oxide film on a surface of the insulating film, among the conductive film and the insulating film, by supplying a halogen-free precursor, an oxidizing agent, and a catalyst to the substrate under a non-plasma atmosphere.
Abstract:
A method for manufacturing a compound semiconductor substrate that can achieve thinning of SiC film, wherein the method includes forming a SiC film on one principal surface side of a Si substrate and forming a recessed part in which a bottom surface is Si in a central part of another principal surface of the Si substrate.
Abstract:
A method for manufacturing of a pellicle that can simplify the manufacturing process is provided. The method for manufacturing of a pellicle comprises a step for forming a SiC film on a bottom surface of a Si substrate, a step for bonding a supporting member including a through hole to a bottom surface of the SiC film, and a step for removing the Si substrate, after bonding the supporting member.
Abstract:
A compound semiconductor substrate includes a SiC (silicon carbide) layer, a AlN (aluminum nitride) buffer layer formed on the SiC layer, an Al (aluminum) nitride semiconductor layer formed on the AlN buffer layer, a composite layer formed on the Al nitride semiconductor layer, a GaN (gallium nitride) layer as an electron transition layer formed on the composite layer, and an Al nitride semiconductor layer as a barrier layer formed on the GaN layer. The composite layer includes C—GaN layers stacked in a vertical direction, and an AlN layer formed between the C—GaN layers.
Abstract:
A compound semiconductor substrate having a desired quality is provided.A compound semiconductor substrate has an SiC (silicon carbide) layer, an AlN (aluminum nitride) buffer layer formed on the SiC layer, an Al (aluminum) nitride semiconductor layer formed on the AlN buffer layer, a first GaN (gallium nitride) layer formed on the Al nitride semiconductor layer, a first AlN intermediate layer formed on the first GaN layer in contact with the first GaN layer, and a second GaN layer formed on the first AlN intermediate layer in contact with the first AlN intermediate layer.
Abstract:
A semiconductor device which can reduce power consumption and a method for manufacturing the same are provided. A semiconductor device comprises an Si (silicon) substrate, an SiC (silicon carbide) layer formed on the surface of the Si substrate, an AlN (aluminum nitride) layer formed on the surface of the SiC layer, an n-type GaN (gallium nitride) layer formed on the surface of the AlN layer, a first electrode formed at the surface side of the GaN layer, and a second electrode formed at the reverse face side of the Si substrate 1. The magnitude of electrical current which flows between the first electrode and the second electrode depends on electrical voltage between the first electrode and the second electrode.
Abstract:
A composite semiconductor substrate being able to improve voltage withstanding and crystalline quality is provided. A composite semiconductor substrate is equipped with an Si (silicon) substrate, an SiC (silicon carbide) layer formed on the surface of the Si substrate, an AlN (aluminum nitride) layer formed on the surface of the SiC layer, a composite layer formed on the surface of the AlN layer, and a GaN (gallium nitride) layer formed on the surface of the composite layer. The composite layer includes an AlN (aluminum nitride) layer and a GaN layer formed on the surface of the AlN layer. In at least one composite layer, the average density of C and Fe in the GaN layer is higher than the average density of C and Fe in the AlN layer.
Abstract:
A thermal expandability adjuster is provided which contains a glycoluril derivative compound represented by formula (1) below. The thermal expandability adjuster can reduce the linear thermal expansion coefficient of a cured product of a thermoset resin composition used for an insulating resin layer or the like and is effective for suppressing deformation of a circuit substrate due to heating. Compounding the above thermal expandability adjuster can reduce the linear thermal expansion coefficient of a cured product obtained by curing a thermoset resin composition and it is therefore possible to provide a member that exhibits small deformation due to heat.
Abstract:
There is provided a method for producing, at a high yield, a composition containing 3-chloro-4-methoxybenzylamine hydrochloride (CMBA-HCl) in which the purity of CMBA-HCl is high. This method comprises a chlorination step involving a chlorination reaction that generates CMBA-HCl from 4-methoxybenzylamine hydrochloride using hydrogen peroxide and hydrochloric acid. There is also provided a CMBA-HCl-containing composition which is produced by the aforementioned production method and in which the purity of CMBA-HCl is high.
Abstract:
An insulating material obtained by using an epoxy resin composition comprising, as an epoxy resin curing agent, a polycondensation-type aryloxysilane compound contained in an amount of 50 to 100 wt %, having a hydroxyl group equivalent in a range of 1,000 to 8,000 g/eq, and an epoxy resin having an epoxy equivalent of 200 to 500, wherein a thermally cured product obtained by curing this epoxy resin composition at a temperature of 180° C. or lower, shows a dielectric constant and a dielectric loss tangent of 3.00 or smaller and 0.015 or smaller, respectively, at 1 GHz under normal temperature. The insulating material using the epoxy resin composition can exhibit both excellent dielectric properties and practical characteristics, and is suitable for an interlayer insulating material of a multilayer printed circuit board.