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    Magnetic head
    1.
    发明申请
    Magnetic head 审中-公开
    磁头

    公开(公告)号：US20080043377A1

    公开(公告)日：2008-02-21

    申请号：US11641616

    申请日：2006-12-18

    申请人： Shigeru Yoshiike ,  Hirofumi Nagai ,  Motonori Ueda

    发明人： Shigeru Yoshiike ,  Hirofumi Nagai ,  Motonori Ueda

    IPC分类号： G11B5/33

    CPC分类号： G11B5/11 ,  G11B5/3912

    摘要： The magnetic head is capable of stabilizing arrangement of magnetic domains in a shield layer of a read-head, preventing variation of characteristics of the read-element and improving reliability. The magnetic head comprises the read-head, in which the read-element is magnetic-shielded by a shield layer. A step-shaped section is formed in a base layer, on which the shield layer is formed, and the step-shaped section corresponds to a border of at least one of domain areas, which are defined by desired magnetic domains to be formed in the shield layer after a magnetizing process.

    摘要翻译： 磁头能够稳定读磁头的屏蔽层中磁畴的布置，防止读取元件的特性变化并提高可靠性。 磁头包括读取头，其中读取元件被屏蔽层磁屏蔽。 在形成屏蔽层的基底层中形成有阶梯形部分，并且阶梯形部分对应于至少一个畴区域的边界，所述区域区域由要形成的所需磁畴限定 磁化过程后的屏蔽层。

    Polycarbonate resin, optical information recording medium substrate comprising the same, and optical information recording medium
    3.
    发明授权
    Polycarbonate resin, optical information recording medium substrate comprising the same, and optical information recording medium 有权
    聚碳酸酯树脂，包含该聚碳酸酯树脂的光学信息记录介质基材和光学信息记录介质

    公开(公告)号：US06288205B1

    公开(公告)日：2001-09-11

    申请号：US09570576

    申请日：2000-05-12

    申请人： Masaaki Miyamoto ,  Motonori Ueda ,  Kiyoji Kuma ,  Ryuji Uchimura ,  Yoshitaka Shiraishi ,  Toshimitsu Inoue

    发明人： Masaaki Miyamoto ,  Motonori Ueda ,  Kiyoji Kuma ,  Ryuji Uchimura ,  Yoshitaka Shiraishi ,  Toshimitsu Inoue

    IPC分类号： C08G6400

    CPC分类号： C08G64/14 ,  G11B7/2534

    摘要： A polycarbonate resin having an improved hue is provided, which is suitable for use as a substrate for transfer type optical recording media such as optical disks. The polycarbonate resin is one obtained by reacting starting materials comprising a dihydric phenol, a carbonate material, and a chain terminator comprising a p-(long chain)-substituted phenol (hereinafter referred to as a para isomer), characterized in that the amount of an o-(long chain)-substituted phenol (hereinafter referred to as an ortho isomer) contained as an impurity in the chain terminator used satisfies the following relationship: ( ortho ⁢   ⁢ isomer ⁢   ⁢ amount ) ( para ⁢   ⁢ isomer ⁢   ⁢ amount ) + ( ortho ⁢   ⁢ isomer ⁢   ⁢ amount ) × 10 6 ≤ 10 ( 0.31 × ( number ⁢   ⁢ of ⁢   ⁢ C ' ⁢ s ) + 0.8 ) ( i ) (wherein “number of C's” represents the number of carbon atoms in the substituent organic group of the substituted phenols).

    摘要翻译： 提供了具有改善的色调的聚碳酸酯树脂，其适合用作光盘等转印型光学记录介质的基材。聚碳酸酯树脂是通过使包含二元酚，碳酸酯材料和 包括对 - （长链）取代的苯酚（以下称为对位异构体）的链终止剂，其特征在于，以（ 使用的链终止剂中的杂质满足以下关系：（其中“C数”表示取代酚的取代基有机基团中的碳原子数）。

    Polycarbonate resin, optical-information recording medium substrate made of the same, and optical-information recording medium
    5.
    发明授权
    Polycarbonate resin, optical-information recording medium substrate made of the same, and optical-information recording medium 有权
    聚碳酸酯树脂，由其制成的光学信息记录介质基材和光学信息记录介质

    公开(公告)号：US06294641B1

    公开(公告)日：2001-09-25

    申请号：US09381278

    申请日：1999-09-20

    申请人： Masaaki Miyamoto ,  Motonori Ueda ,  Kiyoji Kuma ,  Ryuji Uchimura ,  Yoshitaka Shiraishi

    发明人： Masaaki Miyamoto ,  Motonori Ueda ,  Kiyoji Kuma ,  Ryuji Uchimura ,  Yoshitaka Shiraishi

    IPC分类号： C08G6400

    CPC分类号： C08G64/14 ,  G11B7/2534

    摘要： A polycarbonate resin having an improved hue is provided, which is suitable for use as a substrate for transfer type optical recording media such as optical disks. The polycarbonate resin is one obtained by reacting starting materials comprising a dihydric phenol, a carbonate material, and a chain terminator comprising a p-(long chain)-substituted phenol (hereinafter referred to as a para isomer), characterized in that the amount of an o-(long chain)-substituted phenol (hereinafter referred to as an ortho isomer) contained as an impurity in the chain terminator used satisfies the following relationship: ( ortho ⁢   ⁢ isomer ⁢   ⁢ amount ) ( para ⁢   ⁢ isomer ⁢   ⁢ amount ) + ( ortho ⁢   ⁢ isomer ⁢   ⁢ amount ) × 10 6 ≤ 10 ( 0.31 × ( number ⁢   ⁢ of ⁢   ⁢ C ' ⁢ s ) + 0.8 ) ( i ) (wherein “number of C's” represents the number of carbon atoms in the substituent organic group of the substituted phenols).

    摘要翻译： 提供了具有改善的色调的聚碳酸酯树脂，其适合用作光盘等转印型光学记录介质的基材。聚碳酸酯树脂是通过使包含二元酚，碳酸酯材料和 包括对 - （长链）取代的苯酚（以下称为对位异构体）的链终止剂，其特征在于，以（ 使用的链终止剂中的杂质满足以下关系：（其中“C数”表示取代酚的取代基有机基团中的碳原子数）。

    Polycarbonate resin for substrate of optical recording medium
    6.
    发明授权
    Polycarbonate resin for substrate of optical recording medium 失效
    用于光记录介质基板的聚碳酸酯树脂

    公开(公告)号：US6166167A

    公开(公告)日：2000-12-26

    申请号：US124185

    申请日：1998-07-28

    申请人： Masaaki Miyamoto ,  Motonori Ueda

    发明人： Masaaki Miyamoto ,  Motonori Ueda

    IPC分类号： C08G64/24 ,  G11B7/243 ,  G11B7/2433 ,  G11B7/253 ,  G11B7/2534 ,  C08G64/00

    CPC分类号： C08G64/24 ,  G11B7/2433 ,  G11B7/2534

    摘要： A polycarbonate resin obtained by polymerizing an aromatic diol and a carbonate-forming compound using a monophenolic compound as a molecular weight modifier, wherein said polycarbonate resin contains from 0.2 to 2% by weight of a low-molecular weight compound represented by formula (I): ##STR1## wherein R.sup.1 represents an aromatic diol residue; and R.sup.2 represents a monophenolic compound residue, and wherein said polycarbonate resin provides less amount of low-molecular weight volatile matters even when heated or injection-molded. When heated at 350.degree. C. under reduced pressure of 1 mmHg for 20 minutes, the proportion of the low-molecular weight compound of formula (I) which volatilizes is not more than 0.2% by weight based on the weight of said low-molecular weight compound of formula (I) present in the polycarbonate resin. When heated at 400.degree. C. under reduced pressure of 1 mmHg for 30 minutes, the proportion of the low-molecular weight compound of formula (I) which volatilizes is not more than 2% by weight based on the low-molecular weight compound of formula (I) present in the polycarbonate resin.

    摘要翻译： 通过使用单酚化合物作为分子量调节剂使芳族二醇和形成碳酸酯的化合物聚合而获得的聚碳酸酯树脂，其中所述聚碳酸酯树脂含有0.2至2重量％的由式（I）表示的低分子量化合物， 其中R1表示芳族二醇残基; R2表示单酚化合物残基，其中所述聚碳酸酯树脂即使在加热或注射成型时也提供较少量的低分子量挥发性物质。 当在350℃，1mmHg的减压下加热20分钟时，挥发的式（I）的低分子量化合物的比例不超过0.2重量％，基于所述低分子量 式（I）的重量化合物存在于聚碳酸酯树脂中。 当在400℃，1mmHg的减压下加热30分钟时，挥发的式（I）的低分子量化合物的比例不超过2重量％，基于低分子量化合物 式（I）存在于聚碳酸酯树脂中。

    Optical recording medium having zones wherein the number of sectors per track is constant and method of injection-molding the same
    7.
    发明授权
    Optical recording medium having zones wherein the number of sectors per track is constant and method of injection-molding the same 失效
    具有其中每个轨道的扇区数不变的区域的光记录介质和其注射成型的方法

    公开(公告)号：US5831963A

    公开(公告)日：1998-11-03

    申请号：US861282

    申请日：1997-05-21

    申请人： Shigenobu Harada ,  Masae Kubo ,  Motonori Ueda ,  Michio Kawai ,  Masatoshi Kimura ,  Tomohiro Yamazaki

    发明人： Shigenobu Harada ,  Masae Kubo ,  Motonori Ueda ,  Michio Kawai ,  Masatoshi Kimura ,  Tomohiro Yamazaki

    IPC分类号： G11B7/007 ,  G11B7/26 ,  G11B7/24

    CPC分类号： G11B7/00745 ,  G11B7/263

    摘要： A large-capacity optical recording medium, comprises a track region having a plurality of tracks arranged along the concentric or spiral grooves, the track region being radially divided into annular zones, and each of the tracks being partitioned into plural sectors such that a number of the sectors per track is constant in each zone but the number of the sectors per track differs between among zones, wherein an address designating a specific track and sector is previously recorded as a plurality of prepits, the track region having a user-track region, in which a user can optically record or readout information, and a pair of control-track regions, radially bracketing said user-track region, the control-track region permitting the user to read out information therefrom but not to record information thereon, and wherein the control-track region located radially inward of the user-track region is provided with medium information tracks in which medium information has been recorded as prepits, and the control-track region located outward of the user-track region has no medium information track and is not used for recording, nor for reading out of user data.

    摘要翻译： 一种大容量光记录介质，包括具有沿着同心或螺旋槽布置的多个轨道的轨道区域，轨道区域被径向分成环形区域，并且每个轨道被划分成多个扇区，使得多个扇区 每个轨道的扇区在每个区域中是恒定的，但是每个轨道之间的扇区数量在区域之间不同，其中指定特定轨道和扇区的地址被预先记录为多个预凹坑，轨道区域具有用户轨道区域， 其中用户可以光学地记录或读出信息，以及一对控制轨道区域，径向包围所述用户轨道区域，所述控制轨道区域允许用户从其中读出信息，但不在其上记录信息，并且其中 在用户轨道区域的径向内侧设置的控制轨道区域设置有媒体信息轨道，其中介质信息已被记录为预先 凹坑和位于用户轨道区域外侧的控制轨道区域没有介质信息轨迹，并且不用于记录，也不用于读出用户数据。

    Ethylene polymer and fuel tank comprising the same
    8.
    发明授权
    Ethylene polymer and fuel tank comprising the same 失效
    乙烯聚合物和包含该乙烯聚合物的燃料箱

    公开(公告)号：US5547722A

    公开(公告)日：1996-08-20

    申请号：US414231

    申请日：1995-03-31

    申请人： Yumito Uehara ,  Nobuo Enokido ,  Kiyotoshi Fujioka ,  Nobuyuki Shimizu ,  Motonori Ueda

    发明人： Yumito Uehara ,  Nobuo Enokido ,  Kiyotoshi Fujioka ,  Nobuyuki Shimizu ,  Motonori Ueda

    IPC分类号： B32B27/08 ,  C08F10/02 ,  B65D88/12 ,  B32B27/32 ,  B32B27/34

    CPC分类号： B32B27/08 ,  C08F10/02 ,  Y10T428/1352 ,  Y10T428/1383 ,  Y10T428/31746 ,  Y10T428/31913 ,  Y10T428/31928

    摘要： An ethylene homopolymer or copolymer comprising ethylene and not more than 10% by weight of an .alpha.-olefin having from 3 to 20 carbon atoms and a fuel tank obtained therefrom are disclosed, said ethylene homopolymer or copolymer having (1) an intrinsic viscosity [.eta.] of from 2 to 6 dl/g, (2) a density of from 0.945 to 0.970 g/cm.sup.3, (3) an R value of from 2.5 to 4, said R value being defined as a .sigma..sub.2 /.rho..sub.1 ratio, wherein .sigma..sub.1 and .sigma..sub.2 mean stress in elongation with a strain at 2 sec and 4 sec, respectively, under a flow at an elongational strain rate .epsilon. of 0.5 sec.sup.-1, and (4) a relationship between high-velocity impact strength (HRI-IZOD) measured at -30.degree. C. and a melt index under a load of 21.6 kg (HLMI) satisfying formula:HRI-IZOD.gtoreq.-log HLMI+1.15The ethylene polymer exhibits high melt tension and excellent molding properties such as uniform stretchability in blow molding to provide molded articles, such as a fuel tank, having excellent mechanical characteristics, such as high stiffness and high impact resistance, and excellent fire resistance.

    摘要翻译： 公开了包含乙烯和不超过10重量％的具有3至20个碳原子的α-烯烃的乙烯均聚物或共聚物和由其获得的燃料箱，所述乙烯均聚物或共聚物具有（1）特性粘度[η ]为2〜6dl / g，（2）密度为0.945〜0.970g / cm3，（3）R值为2.5〜4，所述R值定义为σ2 / rho 1比， 其中σ1和σ2分别表示在伸长应变速率+ E，点ε+ EE为0.5秒-1的流动下，在2秒和4秒时应变的伸长应力，以及（4） 在-30℃下测量的高速冲击强度（HRI-IZOD）和21.6kg负载下的熔体指数（HLMI）满足公式：HRI-IZOD> / = - log HLMI + 1.15乙烯聚合物显示高熔体 张力和优异的成型性能，例如吹塑成型中的均匀拉伸性，以提供具有优异机械性能的模制品，例如燃料箱 特性如高刚度，高耐冲击性，耐火性优良。