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    • 11. 发明授权
    • Semiconductor memory device having echo clock path
    • 具有回波时钟路径的半导体存储器件
    • US06459652B1
    • 2002-10-01
    • US09996225
    • 2001-11-28
    • Jong Cheol LeeKwang Jin Lee
    • Jong Cheol LeeKwang Jin Lee
    • G11C800
    • G11C7/1066G11C7/1051G11C7/22G11C29/14
    • A semiconductor memory device effectively capable of removing skew between data output of a data output circuit and an echo clock of an echo clock generator is provided. The semiconductor memory device comprises a delay circuit comprising a plurality of delay paths for delaying the data enable clock by different time, a test controller for generating a mode select signal and a delay path test signal in response to a test code signal, and a delay signal selection circuit comprising a plurality of fuses for producing a default delay path select signal based on a programmed state of the plurality of fuses, and a multiplexer, responsive to the mode select signal, for selectively providing the default delay path select signal or the delay path test signal to the delay circuit.
    • 提供了有效地消除数据输出电路的数据输出与回波时钟发生器的回波时钟之间的偏差的半导体存储器件。 半导体存储器件包括延迟电路,该延迟电路包括多个用于将数据使能时钟延迟不同时间的延迟路径,用于响应于测试代码信号产生模式选择信号和延迟路径测试信号的测试控制器以及延迟 信号选择电路,包括多个保险丝,用于基于多个保险丝的编程状态产生默认延迟路径选择信号;以及复用器,响应于模式选择信号,用于选择性地提供默认延迟路径选择信号或延迟 路径测试信号到延迟电路。
    • 12. 发明申请
    • PREPARATION METHOD OF TUNGSTEN CARBIDE SINTERED BODY FOR FRICTION STIR WELDING TOOL
    • 用于摩擦焊接工具的碳化钨烧结体的制备方法
    • US20140191443A1
    • 2014-07-10
    • US14233424
    • 2011-12-09
    • Hyun Kuk ParkIk Hyun OhHee Jun YoonHyeon Taek SonKwang Jin LeeHee Seon BangHan Sur Bang
    • Hyun Kuk ParkIk Hyun OhHee Jun YoonHyeon Taek SonKwang Jin LeeHee Seon BangHan Sur Bang
    • C04B35/64C04B35/56B23K20/12
    • C04B35/64B22F3/105B23K20/1245C04B35/5626C04B35/645C04B2235/6562C04B2235/6581C04B2235/666C04B2235/77C04B2235/96C22C29/08
    • The present invention relates to a preparation method of a tungsten carbide sintered body for a friction stir welding tool used in a friction stir welding tool of a high melting point material such as steel, titanium and the like or a dissimilar material such as aluminum, magnesium-steel, titanium and the like using pulsed current activation through a discharge plasma sintering apparatus. The preparation method comprises the following steps: filling a tungsten carbide (WC) powder in a mold made of a graphite material; mounting the mold filled with tungsten carbide powder in a chamber of a discharge plasma sintering apparatus; making a vacuum inside of the chamber; molding the tungsten carbide powder while maintaining a constant pressure inside the mold and increasing the temperature according to a set heat increase pattern until the temperature reaches a final target temperature; and cooling the inside of the chamber while maintaining the pressure pressurized in the mold after the molding step. According to the preparation method of a tungsten carbide sintered body for a friction stir welding tool, it is possible to obtain a high relative density of 99.5% or higher, and to prepare a uniform sintered body having a homogeneous tissue with little particle growth, high toughness, high abrasion resistance and high strength within a short time by a single process when preparing a tungsten carbide sintered body appropriate for a friction stir welding tool by using pulsed current activation through a discharge plasma sintering apparatus. In addition, since a sintered body is prepared with only a tungsten carbide single material, excluding a sintering additive such as cobalt, a preparation method is simplified, preparation costs are reduced, and toughness, abrasion resistance and strength are superior compared with a sintered body containing cobalt, a sintering additive.
    • 本发明涉及一种用于摩擦搅拌焊接工具的碳化钨烧结体的制备方法,该工具用于诸如钢,钛等的高熔点材料的摩擦搅拌焊接工具或诸如铝,镁之类的异种材料 钢,钛等,通过放电等离子体烧结装置进行脉冲电流激活。 该制备方法包括以下步骤:在由石墨材料制成的模具中填充碳化钨(WC)粉末; 将填充有碳化钨粉末的模具安装在放电等离子体烧结装置的腔室中; 在室内进行真空; 在模具内保持恒定压力的同时成型碳化钨粉末,并根据设定的热量增加模式增加温度,直到温度达到最终目标温度; 并且在模制步骤之后保持在模具中加压的压力同时冷却腔室的内部。 根据用于摩擦搅拌焊接工具的碳化钨烧结体的制备方法,可以获得99.5%以上的高相对密度,并且制备均匀的具有少量颗粒生长的均匀组织的烧结体,高 当通过使用脉冲电流激活通过放电等离子体烧结装置制备适用于摩擦搅拌焊接工具的碳化钨烧结体时,通过单一工艺在短时间内具有韧性,高耐磨性和高强度。 此外,由于仅使用碳化钨单一材料制成烧结体,不包括钴等烧结添加剂,因此制备方法简单,制备成本降低,韧性,耐磨耗性和强度高于烧结体 含钴,烧结添加剂。
    • 16. 发明授权
    • Submerged hollow fiber membrane module
    • 浸没式中空纤维膜组件
    • US07686955B2
    • 2010-03-30
    • US10579194
    • 2004-02-05
    • Moo Seok LeeKwang Jin LeeYong Cheol ShinSeong Hak ChoiYoun Tai Woo
    • Moo Seok LeeKwang Jin LeeYong Cheol ShinSeong Hak ChoiYoun Tai Woo
    • B01D63/02B01D61/00
    • B01D69/04B01D63/02B01D63/027B01D65/08B01D2315/06B01D2321/185B01D2321/2058C02F1/44C02F1/444
    • The present invention discloses a submerged hollow fiber membrane module which is of such a structure that it is easy to expand a module processing capability according to a treatment capacity, provides convenient module coupling properties and module manufacturing properties, maintains a stable flux under an efficient air diffusion condition and prevents the damage of membranes and water leakage caused by the loosening of module connecting regions. The submerged hollow fiber membrane module comprises [I] two module headers (2 and 2′) having a filtrate water collecting portion (3) for collecting filtrate water filtered through hollow fiber membranes and a filtrate water outlet (7), [II] an air diffusion unit 8 consisting of support tubes (9 and 9′) fixing the two module headers (2 and 2′) while keeping them spaced a predetermined distance and air diffusion tubes (11 and 11′) having air diffusion holes (13), and [III] a bundle of hollow fiber membranes (1) having both opposite ends fixed to the insides of the module headers (2 and 2′) by an adhesive (6) so as to form a water collecting space within the module headers (2 and 2′), the ends (5) of the hollow portions of the hollow fiber (20) membranes being opened and disposed in parallel to a filtrate water discharge surface (4).
    • 本发明公开了一种浸没式中空纤维膜组件,其具有根据处理能力容易扩展模块加工能力的结构,提供了方便的模块耦合性能和模块制造性能,在有效空气下保持稳定的焊剂 扩散条件,防止模块连接区域松动引起的膜损伤和漏水。 浸没式中空纤维膜组件包括[I]两个具有滤液收集部分(3)的模块集管(2和2'),用于收集通过中空纤维膜过滤的滤液和滤液水出口(7),[II] 空气扩散单元8,其由支撑管(9和9')组成,固定两个模块集管(2和2'),同时保持它们间隔预定距离,并具有空气扩散孔(13)的空气扩散管(11和11'), 和[III]一束中空纤维膜(1),其两个相对端通过粘合剂(6)固定到模块集管(2和2')的内部,以便在模块集管内形成集水空间( 2和2'),中空纤维(20)膜的中空部分的端部(5)与滤液排水表面(4)平行地打开和设置。
    • 18. 发明申请
    • A Braid-Reinforced Composite Hollow Fiber Membrane
    • 辫状增强复合中空纤维膜
    • US20080305290A1
    • 2008-12-11
    • US12095294
    • 2006-11-28
    • Moo Seok LeeKwang Jin LeeYong-Cheol Shin
    • Moo Seok LeeKwang Jin LeeYong-Cheol Shin
    • B32B1/08
    • B01D69/08B01D69/12B01D2323/02B01D2325/24B01D2325/36B01D2325/40Y10T428/1372
    • A braid-reinforced composite hollow fiber membrane is disclosed. The braid-reinforced composite hollow fiber membrane comprising a reinforcing material of a tubular braid and a polymer resinous thin film coated on the surface of the tubular braid is characterized in that: the tubular braid comprises multifilaments made of monofilaments having a fineness of 0.01 to 0.4 denier, and the peeling strength of the tubular braid and a polymer resinous thin film coated on the surface thereof is 1 to 10 MPa. In the composite hollow fiber membrane, the fineness of the mono filaments constituting the tubular braid of the reinforcing material is small, that is, 0.01 to 0.4 denier, thus the surface area of the tubular braid contacted with the polymer resinous thin film is increased. Thus, the peeling strength of the tubular braid and the polymer resinous thin film coated on the surface thereof is excellent, and at the same time, the initial wetting property of the composite hollow fiber membrane is excellent, that is, 80 to 120%, due to a capillary tube phenomenon or the like.
    • 公开了一种编织增强复合中空纤维膜。 包括管状编织物的增强材料和涂覆在管状编织物表面上的聚合物树脂薄膜的编织增强复合中空纤维膜的特征在于:管状编织物包含由细度为0.01至0.4的单丝制成的复丝 旦尼尔,管状编织物的剥离强度和涂布在其表面上的聚合物树脂薄膜的剥离强度为1〜10MPa。 在复合中空纤维膜中,构成增强材料的管状编织物的单丝的细度小,即0.01〜0.4旦尼尔,因此与聚合物树脂薄膜接触的管状编织物的表面积增加。 因此,管状编织物和其表面上涂覆的聚合物树脂薄膜的剥离强度优异,同时复合中空纤维膜的初始润湿性优异,即80〜120% 由于毛细管现象等。