Abstract:
PROBLEM TO BE SOLVED: To provide a fabricating method of a semiconductor element in which the semiconductor element having good characteristics, high reliability and long lifetime, is easily fabricated. SOLUTION: Seeds including an amorphous layer, etc. are regularly formed on a base substrate, a nitride based III-V compound semiconductor is grown with an inclined face composed of a facet face, dislocations are propagated by the growth with the inclined face composed of the facet face retained, the dislocations are accumulated to the seed region, the substrate is removed, and a surface of the semiconductor is planarized. Accordingly, a plurality of second regions each having an average dislocation density higher than that of a first region are regularly arranged in the first region of single-crystal to fabricate a nitride based III-V compound semiconductor substrate composed of single-crystal in which C-axis is reversed in the second region about the first region. The second region is, at least, partially removed from the major substrate by etching, or the surface of the second region is covered with a coat layer like an insulation film, etc., and thereafter a nitride based III-V compound semiconductor layer for element-formation is grown. COPYRIGHT: (C)2008,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a light-emitting diode which emits light efficiently and which can be manufactured at low costs by a single epitaxial growth, and to provide a manufacturing method of the same. SOLUTION: A substrate 11 having a plurality of protrusions 12 is formed on one main surface of the substrate 11 such as a sapphire substrate wherein the protrusion 12 is made of a material different in type from that of the substrate, an SiO 2 film e.g., and a first nitride-based group III-V compound semiconductor layer 15 is grown on each recess 13 between the protrusions 12 until making a triangle in section wherein a bottom surface of the recess becomes a base of the triangle. Thereafter, a second nitride-based group III-V compound semiconductor layer 15 is laterally grown on the substrate from the first nitride-based group III-V compound semiconductor layer 15. The protrusions 12 are triangular or trapezoidal e.g. in section. On the second nitride-based group III-V compound semiconductor layer 15, a third nitride-based group III-V compound semiconductor layer 15 including an active layer and a nitride-based group III-V compound semiconductor layer 15 are formed. COPYRIGHT: (C)2007,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a method for manufacturing a semiconductor light emitting element which can obtain a good and stable ohmic characteristic and contact resistance, and can prevent oxidation of an electrode upon removal of a resist mask. SOLUTION: The method for manufacturing a semiconductor light emitting element comprises the steps of dry etching a group III-V nitride-based semiconductor layer 10 of a laminated structure of an n type semiconductor layer 3, a luminous layer 4, and a p type semiconductor layer 5 at a relatively low first rate, and thereafter etching the group III-V nitride-based semiconductor layer 10 at a final rate faster than the first rate. COPYRIGHT: (C)2007,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To prevent deterioration of a nitride-based group III-V compound semiconductor layer, containing In and to improve the quality of the nitride-based group III-V compound semiconductor layer that does not contain In, when the nitride-based group III-V compound semiconductor layer that does not contain In is grown on the nitride-based group III-V compound semiconductor layer containing In, such as GaInN layer at a higher growth temperature than that of the latter layer. SOLUTION: A protective film composed of AlGaN is grown on the nitride-based group III-V compound semiconductor layer, containing In at a growth temperature almost equal to or lower than that of the semiconductor layer thereof, and the nitride-based III-V compound semiconductor layer that does not contain In is grown thereon. Here, N 2 is used as the carrier gas, when the nitride-based group III-V compound semiconductor layer containing In and the protecting film are grown, and a mixed gas of H 2 and N 2 is used for the carrier gas, when the nitride-based group III-V compound semiconductor layer that does not contain In is grown. COPYRIGHT: (C)2006,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To deposit a film having excellent film deposition controllability and high packing density. SOLUTION: In a reactor 10 where a first organic precursory material 4 as a host material is film-deposited, a vacuum deposition method is applied. A second organic precursory material 6 as a guest material is vaporized by a vaporizer 80 and is mixed with an inert carrier gas 7 fed from a gas refiner 94, and the mixed vapor 8 is introduced into the reactor 10 through piping 87. A mass flow controller 90 is fitted onto the path of the piping 89. The amount of the second organic precursory material 6 to be introduced into the reactor 10 is controlled by the mass flow controller 90, so that the concentration control in doping is performed. The host material is deposited to a substrate W by a vacuum deposition method capable of performing high speed-high precision film deposition, and the guest material is deposited to the substrate W by an OVPD (Organic Vapor Phase Deposition) method which exhibits excellent concentration controllability. As for the host material, the advantages of the vacuum deposition method can be fully utilized, and, as for the guest material, the advantages of the OVPD method can be fully utilized. COPYRIGHT: (C)2005,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To provide a semiconductor element having a wide low-defect region on the surface and to provide a method for producing a semiconductor element which can easily reduce surface defects in a layer formation step using a lateral growth technique. SOLUTION: A seed crystal layer 201 is grown on a substrate 100, and a growth inhibition layer 216 is formed on the layer 201. That part of the layer 201 which is exposed through the opening of the layer 201 serves as a seed crystal part 215. GaN:Si is grown on the part 215 as a base to form the second seed crystal part 217a. The growth temperature is 1,000°C at the highest. A high-temperature growth part 217b is grown on the part 217a as a base. The growth temperature is 1,050°C at the lowest. The crystal growth proceeds chiefly in the lateral direction to form a continuous unitary layer. Almost no dislocation or crystal defect exists just above the part 217a, and therefore a wide low-defect region is formed on the surface of a nitride semiconductor layer 217. COPYRIGHT: (C)2004,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To provide a film deposition system and a film deposition method by which a shadow effect in film deposition using a mask is prevented, and thin film deposition having a uniform film thickness can be performed in a substrate face. SOLUTION: The film deposition system 1 for depositing a film pattern on a film deposition face Wa in a substrate W is provided with a substrate holding means 13, a mask holding means holding a mask member M to a state of being confronted with the film deposition face Wa in the substrate W held thereby, and a gas feeding means 20 ejecting a film deposition gas G from the side of the mask member M held thereby onto the film deposition face Wa in the substrate W. The substrate holding means 13 holds the substrate W so that the film deposition face Wa in the substrate W is almost vertically held, and is provided with driving means relatively moving the substrate W and the mask member M to the film deposition gas G ejected from the gas feeding means 20, and a temperature control means. COPYRIGHT: (C)2004,JPO
Abstract:
PROBLEM TO BE SOLVED: To provide a thin film forming system capable of supplying gaseous raw materials uniformly onto a substrate surface, thereby uniformizing the thickness of an organic thin film formed on the substrate surface. SOLUTION: The thin film forming system is provided with a vacuum chamber 11, a substrate holder 12 disposed within the vacuum chamber 11 and a gas supply end 22 for supplying the gas toward a substrate fitting surface 12a of the substrate holder 12. The gas supply end 22 is so formed that the gaseous raw materials are supplied in a longer form to the surface 12a. COPYRIGHT: (C)2004,JPO
Abstract:
PROBLEM TO BE SOLVED: To provide an organic thin film deposition apparatus for efficiently and uniformly controlling the temperature in a raw material vessel with an organic raw material stored therein. SOLUTION: In this organic thin film deposition apparatus comprising a treatment chamber 11 to perform film deposition on a substrate S, a raw material gas feed pipe 21 to feed organic raw gas to the treatment chamber 11, and a raw material vessel 31 storing the organic raw material to feed the organic raw material gas to the raw material gas feed pipe 21, a plurality of heating coils 32 to heat the raw material vessel 31 by the electromagnetic induction heating are disposed so as to surround the circumference of the raw material vessel 31, and an AC current control means 34 to independently control the temperature via each heating coil 32 is provided. COPYRIGHT: (C)2004,JPO
Abstract:
PROBLEM TO BE SOLVED: To provide a thin-film forming apparatus for forming an organic thin film with a uniform thickness on the surface of a substrate, and to provide a thin-film forming method. SOLUTION: The thin-film forming apparatus has a treatment chamber 11, a substrate holder 13 installed in the treatment chamber 11, a gas supply means 15 for supplying a gas G to a substrate-mounting surface 13a of the substrate holder 13, and an outlet 31 for exhausting a redundant gas G in the treatment chamber 11, wherein the outlet 31 is installed into plurality, and each outlet 31 is arranged so that the gas G supplied from the gas supply means 15 is introduced to each part of the substrate-mounting surface 13a. The thin-film forming method is characterized by using the apparatus. COPYRIGHT: (C)2004,JPO