Abstract:
A method for controlling morphology of a surface of a polymer using an ion beam and a polymer with a ripple pattern on a surface fabricated thereby, and applications thereof are provided to form a nano-size pattern of a particular shape in a desired region by changing an irradiation time and an incident angle. A focused ion beam(4) is irradiated obliquely in an incident angle(2) of a constant angle on an irradiation region(5) of an upper surface of a polymer substrate(3) in order to form a ripple pattern. A hierarchical structure having two or more different periods is formed in the ripple pattern by adjusting a beam irradiation time. The ripple pattern is oriented in a particular direction. The width and height of the ripple pattern are controlled by adjusting at least one of the incident angle and an irradiation time of the ion beam and intensity of an acceleration voltage.
Abstract:
A structure of a low noise saw and a low noise diamond saw are provided to achieve improved durability of the saw by eliminating the necessity of forming holes in a metal plate. A structure of a low noise saw includes a shank(12) made with a metal plate, and a damper(20) having a part which is spot-welded to one or both of the upper and lower surfaces of the shank. The shank has an outer circumferential surface with teeth of saw. One or both of the upper and lower surface of the shank have grooves(50,50') with thicknesses for accommodating the damper.
Abstract:
본 발명은 플라즈마 이온 주입에 의한 고분자 표면 위에 금속 박막을 증착하는 방법 및 이를 위한 장치에 관한 것이다. 구체적으로, 본 발명은 플라즈마를 발생시킨 후 금속 타겟에 음의 전압을 인가하여 스퍼터링시키고, 고분자 시료에 고전압 펄스를 인가하여 이온을 주입하는 방식으로 금속을 증착하는 것을 특징으로 하는 방법 및 장치를 제공한다. 본 발명에 따라 고분자 기판에 음의 펄스 전압을 가하여 플라즈마 이온 주입법과 금속 증착 방법을 융합하여 금속 박막을 증착하므로써 완만한 계면층을 형성하여 접착력을 향상시키는데 매우 효과적이다. 고분자, 접착력, 금속 박막, 형성 방법, 플라즈마, 고전압 펄스, 이온 주입
Abstract:
본 발명은 플라즈마 이온 주입 및 열처리에 의하여 금속으로 이루어진 입체구조 재료의 표면을 처리하여 표면의 소수성을 향상시키는 방법 및 장치에 관한 것이다. 본 발명에 따른 방법은 진공조 내에 위치한 전도성 시료대 위에 금속 시료를 위치시키는 단계, 진공조 내에 플라즈마원 기체를 도입하는 단계, 도입된 플라즈마원 기체로부터 플라즈마를 발생시키는 단계, 음의 고전압 펄스를 상기 금속 재료에 가하여, 플라즈마로부터 추출된 이온이 고에너지를 보유한 채 상기 시료의 표면에 주입되도록 하는 단계, 및 이온 주입 후 시료의 온도를 상승시켜 열처리하는 단계를 포함한다. 플라즈마 이온 주입, 열처리, 금속, 소수성, 입체 구조
Abstract:
A high-power pulsed RF amplifier is provided to generate an RF output of high power as an RF output of low power by using an electrontube-semiconductor cascode circuit. A semiconductor switch(2) is connected to a cathode of an electrontube to constitute a cascode circuit. A power input member(13) applies a high voltage to an anode of the electrontube. A DC source input member(12) applies a DC power to plural auxiliary electrodes of the electrontube. A pulsed RF input member applies a pulsed RF driving power to the semiconductor switch. A pulsed RF output member(14) generates the pulsed RF output in the electrontube. An impedance matching member(15) controls impedance matching of the pulsed RF output.
Abstract:
PURPOSE: An ion implantation method using pulse plasma is provided to effectively improve abrasion resistance and intensity of the surface of a sample, by applying a radio frequency(RF) pulse and a negative direct current(DC) high voltage to a plasma generating gas and by uniformly implanting ions into the surface of the sample. CONSTITUTION: The sample is positioned on a sample table(14) inside a vacuum bath(10). Gas to be transformed into plasma is supplied to the vacuum bath. An RF pulse is radiated to the gas. The negative DC high voltage is applied to the sample to implant plasma ions of a plasma state into the surface of the sample.
Abstract:
An ozone production rate control method and a device using dual frequency in an apparatus employing a silent discharge technique are provided. The method includes the steps of: generating a control signal for controlling the ozone production rate; creating, responsive to the control signal, an adjusted signal having an ON/OFF time ratio adjusted depending on the control signal; producing, responsive to the adjusted signal, a low-frequency pulse and a high-frequency signal; and controlling an ON/OFF time ratio of the high-frequency signal. The device includes an ON/OFF time ratio adjusting unit, a low-frequency pulse oscillation circuit, a high-frequency oscillation circuit, and a multiplier.
Abstract:
PURPOSE: An apparatus for generating high concentration ozone is provided to generate high concentration ozone at a high efficiency and linearly control concentration of ozone generated. CONSTITUTION: In an ozone generating apparatus capable of linearly controlling concentration of ozone generated, the apparatus for generating high concentration ozone comprises a means for providing with oxygen(218); a means for generating ozone by impressing electric discharge to the gas flown in from the gas providing means; a means that is used in the electric discharge and provides with first pulse signal in which an on-off time ratio is controlled; and a conversion means which is electrically connected to an ozone generating means(104) and the pulse providing means and provides the ozone generating means with the signal level converted from the first pulse by converting the first pulse from the pulse signal providing means into a preset signal level, wherein the apparatus further comprises a control signal generating means(114) which is electrically connected to the pulse signal providing means and generates control signals for controlling the on-off time ratio of the first pulse signal, and the ozone generating means(104) comprises one or more upper and lower electrodes(204,210) which are oppositely directed to each other and generate voltage discharge; insulating materials(202,208) which are flatly formed on one side surface of each of the upper and lower electrodes; and cooling means(206,212) which are formed adjacently to one side surface of each of the upper and lower electrodes(204,210), wherein the upper electrodes are electrically connected to the conversion means so that the first pulse signal is impressed to the upper electrodes, and the lower electrodes are grounded.
Abstract:
PURPOSE: A method and apparatus for controlling the amount of ozone production using dual frequencies especially in ozone generator adopting silent discharge are provided, which control ON/OFF time ratio of high frequency and high voltage pulse according to ON/OFF time ratio of other frequency which is relatively lower than frequency of high frequency and high voltage pulse, thus can obtain ozone generation rate changeable lineally according to control input signal. CONSTITUTION: The method for controlling the amount of ozone production using dual frequencies includes the steps of generating a first signal of direct voltage of 5V to 10 V for controlling ozone generation rate; generating a second signal having ON/OFF time ratio in response to the first signal; generating a third signal of pulse signal having frequency of 1 Hz to 5 kHz having ON/OFF time ratio in response to the second signal; generating a fourth signal of pulse signal having 1 kHz to 50 kHz; and controlling the ON/OFF time ratio of the fourth signal to change according to the ON/OFF signal of the third signal.
Abstract:
본 발명은 진공조 내에 위치한 시료대 위에 판상의 고분자 시료를 위치시키고, 진공조 내에 가스를 도입하여 가스로부터 이온 플라즈마를 발생시키고, 부(-)의 고전압 펄스를 시료에 가하여, 플라즈마로부터 추출된 이온이 고에너지를 보유한 채 고분자 시료의 표면에 주입되도록 하는 것이 특징인 소분자 소재의 표면 개질 방법 및 그를 위한 장치에 관한 것이다. 본 발명의 방법을 따르면, 입사되는 이온의 에너지가 종래의 플라즈마를 이용한 고분자 표면 개질 방법에서의 이온 에너지보다 매우 높으므로 표면 개질 효율이 탁월하고 표면 이하 깊은 층까지 개질시킬 수 있어 처리 후 시간에 따른 표면 특성 저하를 효과적으로 방지할 수 있게 된다. 또한, 본 발명의 고분자 표면 개질 방법은 대면적이 시료를 단시간내에 용이하게 균일 처리할 수 있으며, 고전압 펄스를 조절하여 이온 에너지를 쉽게 변화시킬 수 있을 뿐 아니라 장치의 구조 또한 매우 단순화시키므로 대량 생산 장치에 유리하다.