Abstract:
The present invention relates to a compound semiconductor substrate and a method for manufacturing the same. The present invention provides the manufacturing method which coats spherical balls on a substrate, forms a metal layer between the spherical balls, removes the spherical balls to form openings, and grows a compound semiconductor layer from the openings. According to the present invention, the manufacturing method can be simplified and grow a high quality compound semiconductor layer rapidly, simply and inexpensively, as compared with a conventional ELO (Epitaxial Lateral Overgrowth) method or a method for forming a compound semiconductor layer on a metal layer. And, the metal layer serves as one electrode of a light emitting device and a light reflecting film to provide a light emitting device having reduced power consumption and high light emitting efficiency.
Abstract:
The present invention reports a defect that has not been reported, and discloses a defect-controlled silicon ingot, a defect-controlled wafer, and a process and apparatus for manufacturing the same. The new defect is a crystal defect generated when a screw dislocation caused by a HMCZ (Horizontal Magnetic Czochralski) method applying a strong horizontal magnetic field develops into a jogged screw dislocation and propagates to form a cross slip during thermal process wherein a crystal is cooled. The present invention changes the shape and structure of an upper heat shield structure arranged between a heater and an ingot above a silicon melt, and controls initial conditions or operation conditions of a silicon single crystalline ingot growth process to reduce a screw dislocation caused by a strong horizontal magnetic field and prevent the screw dislocation from propagating into a cross slip.
Abstract translation:本发明报道了未报道的缺陷,并公开了缺陷控制硅锭,缺陷控制晶片及其制造方法和装置。 新的缺陷是当由施加强水平磁场的HMCZ(Horizontal Magnetic Czochralski)方法引起的螺旋位错产生于慢跑螺钉位错时产生的晶体缺陷,并且在冷却晶体的热处理期间传播以形成交叉滑移。 本发明改变了布置在硅熔体上方的加热器和锭之间的上部隔热结构的形状和结构,并且控制了硅单晶锭生长过程的初始条件或操作条件以减少由强的 水平磁场,防止螺丝错位传播到十字滑移。
Abstract:
A wafer support pin has a front end contacted with a wafer such that the front end is flat or rounded. Thus, gravitational stress is minimized during annealing the wafer, thereby minimizing slip dislocation. This wafer support pin is suitably used for annealing of a wafer, particularly high temperature rapid thermal annealing of a large-diameter wafer.
Abstract:
The present invention relates to an apparatus for manufacturing a high-quality semiconductor single crystal ingot and a method using the same. The apparatus of the present invention includes a quartz crucible, a heater installed around a side wall of the quartz crucible, a single crystal pulling means for pulling a single crystal from the semiconductor melt received in the quartz crucible, and a magnetic field applying means for forming a Maximum Gauss Plane (MGP) at a location of ML-1000 mm to ML-350 mm based on a Melt Level (ML) of the melt surface, and applying a strong magnetic field of 3000 to 5500 Gauss to an intersection between the MGP and the side wall of the quartz crucible and a weak magnetic field of 1500 to 3000 Gauss below a solid-liquid interface.
Abstract:
The present invention reports a defect that has not been reported, and discloses a defect-controlled silicon ingot, a defect-controlled wafer, and a process and apparatus for manufacturing the same. The new defect is a crystal defect generated when a screw dislocation caused by a HMCZ (Horizontal Magnetic Czochralski) method applying a strong horizontal magnetic field develops into a jogged screw dislocation and propagates to form a cross slip during thermal process wherein a crystal is cooled. The present invention changes the shape and structure of an upper heat shield structure arranged between a heater and an ingot above a silicon melt, and controls initial conditions or operation conditions of a silicon single crystalline ingot growth process to reduce a screw dislocation caused by a strong horizontal magnetic field and prevent the screw dislocation from propagating into a cross slip.
Abstract translation:本发明报道了未报道的缺陷,并公开了缺陷控制硅锭,缺陷控制晶片及其制造方法和装置。 新的缺陷是当由施加强水平磁场的HMCZ(Horizontal Magnetic Czochralski)方法引起的螺旋位错产生于慢跑螺钉位错时产生的晶体缺陷,并且在冷却晶体的热处理期间传播以形成交叉滑移。 本发明改变了布置在硅熔体上方的加热器和锭之间的上部隔热结构的形状和结构,并且控制了硅单晶锭生长过程的初始条件或操作条件以减少由强的 水平磁场,防止螺丝错位传播到十字滑移。
Abstract:
A method for cleaning a silicon wafer includes (S11) cleaning surfaces of a silicon wafer using an SC-1 cleaning solution according to standard clean 1; (S12) rinsing the surfaces of the silicon wafer, cleaned in the step S11, using deionized water; (S13) cleaning the surfaces of the silicon wafer, rinsed in the step S12, using a cleaning solution including hydrochloric acid, ozone water and deionized water; (S14) rinsing the surfaces of the silicon wafer, cleaned in the step S13, using deionized water; and (S15) drying the surfaces of the silicon wafer, rinsed in the step S14. A stable oxide film is formed on the surfaces of the silicon wafer using a material having a strong oxidizing ability while a cleaning process is performed. Therefore, a problem that as time passes, external impurities are attached to the surfaces of the silicon wafer can be solved by a simple and safe process.
Abstract:
In a method for producing a high quality silicon single crystal by the Czochralski method, a lower portion of a solid-liquid interface of a single crystal growth is divided into a central part and a circumferential part, and the temperature gradient of the central part and the temperature gradient of the circumferential part are separately controlled. When a silicon melt located at a lower portion of a solid-liquid interface of a single crystal growth is divided into a central part melt and a circumferential part melt, the method controls the temperature gradient of the central part melt by directly controlling the temperature distribution of a melt and indirectly controls the temperature gradient of the circumferential part melt by controlling the temperature gradient of the single crystal, thereby effectively controlling the overall temperature distribution of the melt, thus producing a high quality single crystal ingot free of defects with a high growth velocity.
Abstract:
Disclosed is a method of growing a single crystal from a melt contained in a crucible. The method includes the step of making the temperature of a melt increase gradually to a maximum point and then decrease gradually along the axis parallel to the lengthwise direction of the single crystal from the interface of the single crystal and the melt to the bottom of the crucible. The increasing temperature of the melt is kept to preferably have a greater temperature gradient than the decreasing temperature thereof. Preferably, the axis is set to pass through the center of the single crystal. Preferably, the convection of the inner region of the melt is made smaller than that of the outer region thereof.
Abstract:
The present invention relates to a method for cleaning a silicon wafer, including (S1) a first cleaning step for cleaning surfaces of a silicon wafer using an SC-1 cleaning solution according to standard clean 1; (S2) a second cleaning step for cleaning the surfaces of the silicon wafer, cleaned in the first cleaning step, using an SC-2 cleaning solution according to standard clean 2; (S3) a third cleaning step for cleaning the surfaces of the silicon wafer, cleaned in the second cleaning step, using a hydrogen fluoride (HF) solution; and (S4) a fourth cleaning step for cleaning the surfaces of the silicon wafer, cleaned in the third cleaning step, using an ozone water. The present invention removes effectively metallic impurities on the surfaces of the silicon wafer and improves the surface roughness of the silicon wafer, and thus is capable of providing a silicon wafer with a remarkably improved physical characteristic.
Abstract:
A silicon wafer grinding apparatus, a retaining assembly used for the same, and a silicon wafer flatness correcting method are provided More particularly, a silicon wafer grinding apparatus, a retaining assembly used for the same, and a silicon wafer flatness correcting method for correcting a wafer flatness in a final grinding process are provided The silicon wafer grinding apparatus includes a grinding surface plate having a grinding pad attached thereon; a grinding head arranged opposite to the grinding surface plate and rotated in the same direction as that of the grinding surface plate; a backing film attached at a lower portion of the grinding head for supporting a wafer; and a retainer ring having an inner diameter (a wafer diameter +α) greater than a diameter of the wafer by as much as a and disposed on the backing film. By forming a diameter or physical properties of a part of the backing film of the wafer retaining assembly, the wafer flatness of the final grinding may be corrected.