摘要:
[Purpose] In the field of sapphire substrates used chiefly for epitaxial growth of nitride semiconductor layers, to provide a sapphire substrate of which the shape and/or amount of warping can be controlled efficiently and precisely and of which substrate warping that occurs during layer formation can be suppressed and substrate warping behavior can be minimized, to provide nitride semiconductor layer growth bodies, nitride semiconductor devices, and nitride semiconductor bulk substrates using such substrates, and to provide a method of manufacturing these products. [Means of Resolution] Reformed domain patterns are formed within a sapphire substrate and the warp shape and/or amount of warping of the sapphire substrate are controlled by means of multiphoton absorption by condensing and scanning a pulsed laser through a polished surface of the sapphire substrate. When nitride semiconductor layers are formed using sapphire substrates obtained by means of this invention, substrate warping during layer formation is suppressed and substrate warping behavior is minimized so that layer quality and uniformity are improved and the quality and yield of nitride semiconductor devices is increased.
摘要:
In order to correct warpage that occurs in formation of a multilayer film, provided are a single crystal substrate with a multilayer film, a manufacturing method therefor, and an element manufacturing method using the manufacturing method. The single crystal substrate with a multilayer film includes: a single crystal substrate (20); a multilayer film (30) including two or more layers that is formed on one surface of the single crystal substrate (20) and having a compressive stress; and a heat-denatured layer (22) provided, of two regions (20U, 20D) obtained by bisecting the single crystal substrate (20) in the thickness direction thereof, at least in the region (20D) on the side of the surface opposite to the one surface of the single crystal substrate (20) having the multilayer film (30) formed thereon.
摘要:
To eliminate damage to a light-emitting element layer caused by the formation of a vertical hole to be formed in a monocrystalline substrate when manufacturing a light-emitting element. Provided are a method of manufacturing a light-emitting element by which a light-emitting element (80) is manufactured through the following steps and a light-emitting element manufactured by employing the method. A light-emitting element layer (40) is formed on one face (32T) of a monocrystalline substrate (30A) for a light-emitting element. Next, the other face (32B) of the monocrystalline substrate (30A) for a light-emitting element is polished until a state where a vertical hole (34A) penetrates the monocrystalline substrate (30A) for a light-emitting element in its thickness direction is established. Next, a conductive material is filled into the vertical hole (34B) from the side of the vertical hole (34B) closer to an opening (36B) in the other face (32B) to form a conductive portion (50) that is continuous from a side closer to the light-emitting element layer (40) to the opening (36B) in the other face (32B).
摘要:
In order to correct warpage resulting from the formation of a multilayer film, provided are a single crystal substrate which includes a heat-denatured layer provided in one of two regions including a first region (10D) and a second region (10U) obtained by bisecting the single crystal substrate in a thickness direction thereof, and which is warped convexly toward a side of a surface of the region provided with the heat-denatured layer, a manufacturing method for the single crystal substrate, a manufacturing method for a single crystal substrate with a multilayer film using the single crystal substrate, and an element manufacturing method using the manufacturing method for a single crystal substrate with a multilayer film.
摘要:
To inhibit appearance of a void (void due to a surface shape of a substrate) on a joined interface of a composite substrate, provided is a composite substrate manufacturing method, including at least: a first raw board deforming step of preparing a first substrate (12) by deforming a first raw board (10) having at least one surface as a mirror surface (10M) into a state in which the mirror surface (10M) warps outward; and a joining step of joining, after the first raw board deforming step, a protruding surface of the first substrate (12) and one surface (20TP) of a second substrate (22) to each other, thereby manufacturing a composite substrate (30) including the first substrate (12) and the second substrate (22) joined to the first substrate (12), in which the second substrate (22) is any one substrate selected from a substrate having both surfaces as substantially flat surfaces and a substrate that warps so that a surface (20TP) thereof to be joined to the first substrate (12) warps outward. Also provided are a semiconductor element manufacturing method using the composite substrate manufacturing method, and a composite substrate and a semiconductor element manufactured using the composite substrate manufacturing method.
摘要:
Provided are an internally reformed substrate for epitaxial growth having an arbitrary warpage shape and/or an arbitrary warpage amount, an internally reformed substrate with a multilayer film using the internally reformed substrate for epitaxial growth, a semiconductor device, a bulk semiconductor substrate, and manufacturing methods therefor. The internally reformed substrate for epitaxial growth includes: a single crystal substrate; and a heat-denatured layer formed in an internal portion of the single crystal substrate by laser irradiation to the single crystal substrate.
摘要:
Provided are a crystalline film in which variations in the crystal axis angle after separation from a substrate for epitaxial growth have been eliminated, and various devices in which the properties thereof have been improved by including the crystalline film. Also provided are manufacturing methods for the crystalline film and the devices. A crystalline film having a thickness in the range of 300 µm or more and 10 mm or less is formed by epitaxial growth on a surface of a single crystal substrate, which is the substrate for epitaxial growth. The crystalline film is subsequently separated from the single crystal substrate. A reformed region pattern is formed by, when a relative position of the reformed region pattern in a thickness direction of the crystalline film in which warpage has occurred after separation is assumed to be 0% at a surface thereof on a concavely warped side and 100% at a surface thereof on a convexly warped side, concentrating a pulsed laser onto an internal portion of the crystalline film in a range of 3% or more and less than 50% in the thickness direction to scan the internal portion, and using multiphoton absorption by the pulsed laser, thereby reducing or eliminating the amount of warpage of the crystalline film and reducing or eliminating variations in the crystal axis angle.