摘要:
The invention relates to a method and a device for depositing thin layers on a substrate in a process chamber arranged in a reactor housing, the bottom of said process chamber consisting of a temperable substrate holder which can be rotatably driven about its vertical axis, and the cover of said chamber consisting of a gas inlet element. Said cover extends parallel to the bottom and forms, together with its gas outlets arranged in a sieve-type manner, a gas exit surface which extends over the entire substrate bearing surface of the substrate holder, the process gas being introduced into the process chamber through said gas exit surface. The invention is characterized in that the height of the process chamber which is defined by the distance between the substrate bearing surface and the gas exit surface is varied before the beginning of the deposition process and/or during the deposition process.
摘要:
The invention relates to a device for depositing especially, crystalline layers onto one or more, especially, also crystalline substrates in a process chamber using reaction gases which are guided into said process chamber, where they undergo pyrolytic reaction. The device has a heatable support plate wherein at least one substrate holder lies loosely, especially rotationally, with its surface flush with the surroundings. A compensation plate which adjoins the at least one substrate holder, following the contours of the same, is provided on the support plate in order to keep the isothermal profile on the support plate as flat as possible.
摘要:
The invention relates to a device for depositing thin layers on a substrate, comprising a process chamber arranged in a reactor housing, the bottom of said process chamber being formed by a susceptor for receiving at least one substrate and a gas inlet organ being assigned to the lid of said process chamber, wherein the process gas can be introduced into the process chamber by means of a gas outlet surface which is substantially evenly distributed on the surface thereof and which points towards the susceptor. In order to prevent parasitic accumulation in the gas inlet organ, the gas outlet surface is formed by a gas-permeable diffuser plate, which can extend parallel to a gas outlet plate having a plurality of gas outlet holes arranged in the form of sieves.
摘要:
The invention relates to a device for carrying out a method wherein the process gases are introduced via a common gas inlet element (D) into the process chamber in which a substrate holder (S) is arranged. The gas inlet element has a gas outlet surface which is tempered and which possesses a plurality of gas outlets like a sieve. The substrate holder extends parallel to the gas outlet surface on a horizontal plane and is rotationally driven about a vertical axis. The distance between the substrate holder and the gas outlet surface is not greater than 75 mm. A gas supply device for the reactive gases consisting of at least one metal-organic compound and at least one hydride in addition to another gas is also provided. The isotherms extending above the substrate holder become increasingly flatter as the distance from the gas inlet element becomes smaller, thereby resulting in a higher degree of isothermic homogeneity.
摘要:
A process for depositing thin layers on a substrate in a process chamber arranged in a reactor housing, the bottom of the process chamber consisting of a temperable substrate holder which can be rotatably driven about its vertical axis, and the cover of the chamber consisting of a gas inlet element. The cover extends parallel to the bottom and forms, together with its gas outlets arranged in a sieve-type manner, a gas exit surface which extends over the entire substrate bearing surface of the substrate holder, the process gas being introduced into the process chamber through the gas exit surface. The process includes the step of varying the height of the process chamber, which is defined by the distance between the substrate bearing surface and the gas exit surface, before the beginning of the deposition process and/or during the deposition process.
摘要:
In a process for the production of thin films and epitaxial layers by gas-phase deposition, intramolecularly stabilized organometallic compounds are employed as a source of metal.
摘要:
This invention relates to a method for depositing III-V semiconductor layers on a non III-V substrate especially a sapphire, silicon or silicon oxide substrate, or another substrate containing silicon. According to said method, a III-V layer, especially a buffer layer, is deposited on the substrate or on a III-V germination layer, in a process chamber of a reactor containing gaseous starting materials. In order to reduce the defect density of the overgrowth, a masking layer consisting of essentially amorphous material is deposited directly on the III-V germination layer or directly on the substrate, said masking layer partially covering of approximately partially covering the germination layer. The masking layer can be a quasi-monolayer and can consist of various materials.
摘要:
In a process for the production of thin films and epitaxial layers by gas-phase deposition, intramolecularly stabilized organometallic compounds are employed as a source of metal.
摘要:
The invention relates to a method for depositing thick III-V semiconductor layers on a non-III-V substrate, particularly a silicon substrate, by introducing gaseous starting materials into the process chamber of a reactor. The aim of the invention is to carry out the crystalline deposition of thick III-V semiconductor layers on a silicon substrate without the occurrence of unfavorable lattice distortions. To this end, the invention provides that a thin intermediate layer is deposited at a reduced growth temperature between two III-V layers.
摘要:
The invention relates to a method for the production of III-V laser components, whereby a III-V semiconductor layer is deposited on a silicon substrate in a process chamber of a reactor from a gaseous starting material. According to the invention, an economical method for the production of qualitatively high-grade laser may be achieved whereby, firstly, an Al-containing buffer layer is deposited on the Si substrate, in particular a Si(III) substrate, on which the III-V semiconductor layer, in particular, GaN is then deposited such that the lattice plane thereof runs parallel to the cleavage direction of the substrate, whereby, on cleaving the substrate plane-parallel layer, cleavage surfaces are formed.