Abstract:
Disclosed is a system and a method for providing a Visual ARS (VARS) service by using a call control function of a mobile communication terminal. In the system and the method, a user of a terminal can select an existing voice guidance service or an available visual guidance service when trying a call connection to a telephone number of an existing call center. When selecting a visual guidance service, an originator receives an ARS service on a screen of the terminal of the originator. Accordingly, the user can receive and use the VARS service according to the user's selection by using a mobile communication network, so that the user can handle a task requested on a screen of the terminal. Hence, it is possible to overcome the disadvantage of a limited voice guidance-centered ARS service that a call center currently provides in a stereotyped manner regardless of the generation development of terminals. Also, it is possible to provide various VARS services with the development of mobile communication terminals.
Abstract:
A method for manufacturing a gallium nitride (GaN) wafer is provided. In the method for manufacturing the GaN wafer according to an embodiment, an etch stop layer is formed on a substrate, and a first GaN layer is formed on the etch stop layer. A portion of the first GaN layer is etched with a silane gas, and a second GaN layer is formed on the etched first GaN layer. A third GaN layer is formed on the second GaN layer.
Abstract:
A vibration motor is disclosed. In accordance with an embodiment of the present invention, the vibration motor includes a base, a vibrator, which reciprocates in the base, a protruding part, which is formed on at least one of the base and the vibrator, and an elastic body, which is interposed between the base and the vibrator and has a through-part formed therein and in which the protruding part is inserted into the through-part and the elastic body is coupled to the base or the vibrator by caulking or bending the protruding part which is protruded through the through-part. Thus, the vibration motor can have a uniform resonant frequency characteristic since a spring is coupled by way of caulking or bending.
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:
Provided is a method for preparing a compound semiconductor substrate. The method includes coating a plurality of spherical balls on a substrate, growing a compound semiconductor epitaxial layer on the substrate coated with the spherical balls while allowing voids to be formed under the spherical balls, and cooling the substrate on which the compound semiconductor epitaxial layer is grown so that the substrate and the compound semiconductor epitaxial layer are self-separated along the voids. The spherical ball treatment can reduce dislocation generations. In addition, because the substrate and the compound semiconductor epitaxial layer are separated through the self-separation, there is no need for laser lift-off process.
Abstract:
An apparatus and method for processing a substrate using neutralized beams are provided. A substrate processing apparatus includes an ion source generating device configured to form an ion source. An ion extraction device is configured to extract and accelerate ions from the ion source. An ion neutralizing device is configured to convert the ions extracted and accelerated from the ion extraction device into neutralized beams. A remaining portion of the ions extracted and accelerated from the ion extraction device is not converted into the neutralized beams. A substrate support is configured to support a substrate such that the neutralized beams are directed towards the substrate support. A substrate power supply is configured to apply a voltage to the substrate support such that the remaining portion of the ions that is not converted into the neutralized beams is directed away from the substrate support by the applied voltage of the substrate.
Abstract:
The present invention relates to a nitride semiconductor substrate such as gallium nitride substrate and a method for manufacturing the same. The present invention forms a plurality of trenches on a lower surface of a base substrate that are configured to absorb or reduce stresses applied larger when growing a nitride semiconductor film on the base substrate from a central portion of the base substrate towards a peripheral portion. That is, the present invention forms the trenches on the lower surface of the base substrate such that pitches get smaller or widths or depths get larger from the central portion of the base substrate towards the peripheral portion.
Abstract:
A linear vibrator is disclosed. The linear vibrator in accordance with an embodiment of the present invention includes a base, a coil unit, which is coupled to the base, a magnet assembly, which forms a closed circuit of a magnetic force perpendicular to an electric current flowing through the coil unit and in which the magnet assembly relatively moves with respect to the coil unit, and an elastic member, which elastically supports the magnet assembly. Thus, a linear vibrator with an increased driving force can be provided by preventing the leakage of magnetic flux.
Abstract:
A chamber-status monitoring apparatus includes a plurality of chambers, a time-division multiplexer configured to receive, via optical fiber probes, optical signals from each chamber, to divide each optical signal into first time slots having a predetermined duration, and to multiplex the first time slots to generate an OTDM signal, a multi-input optical emission spectroscope configured to receive and disperse the OTDM signal according to wavelengths to measure spectrum information, and a controller configured to divide the spectrum information of the dispersed OTDM signal into second time slots with a predetermined time interval therebetween, to classify the second time slots according to the chambers to obtain spectrum information of the optical signals of the individual chambers, and to control endpoint detection in each of the chambers in accordance with the spectrum information of the optical signal of the corresponding chamber.
Abstract:
A linear vibrator is disclosed. The linear vibrator includes a base, a coil unit, which is coupled to the base, a magnet, which is coupled to the coil unit such that the magnet can move relatively, and a plurality of leaf springs, which are interposed between the magnet and the base. Here, the plurality of leaf springs face one another and are coupled to one another Thus, the linear vibrator can increase the range of vibration displacement in a structure and increase the amount of vibration in the linear vibrator. Also, even though the linear vibrator becomes thinner, the range of displacement can be increased because the weight is vibrated horizontally.