Process for the preparation of optically active 2-[6-hydroxymethyl)-1,3-dioxan-4yl]acetic acid derivatives
    71.
    发明授权
    Process for the preparation of optically active 2-[6-hydroxymethyl)-1,3-dioxan-4yl]acetic acid derivatives 有权
    制备光学活性2-Ä6-(羟甲基)-1,3-二恶烷-4-基乙酸衍生物的方法

    公开(公告)号:US06472544B1

    公开(公告)日:2002-10-29

    申请号:US09509998

    申请日:2000-08-16

    IPC分类号: C07D31906

    摘要: This invention provides a process for producing optically active 2-[6-(hydroxymethyl)-1,3-dioxan-4-yl]acetic acid derivatives, which are of value as intermediates of drugs, from inexpensive starting materials without using any special equipment such as that required for super-low temperature reactions. A process for producing optically active 2-[6-(hydroxymethyl)-1,3-dioxan-4-yl]acetic acid derivatives which comprises reacting an acetic acid derivative at a temperature of not less than −30° C. with an enolate prepared by permitting either a base or a metal having a valency of 0 to act on the derivative to produce a hydroxyoxohexanoic acid derivative, reducing this compound with the aid of a strain of microorganism to provide a halomethyldioxanylacetic acid derivative, treating this compound with an acetalizing agent in the presence of an acid catalyst to provide a halomethyldioxanylacetic acid derivative, reacted with an acyloxylating agent to provide a acyloxymethyldioxanylacetic acid derivative, and subjecting this compound to solvolysis in the presence of a base.

    摘要翻译: 本发明提供了从廉价起始原料生产具有价值作为药物中间体的光学活性的2- [6-(羟甲基)-1,3-二恶烷-4-基]乙酸衍生物的方法,而不使用任何特殊设备 例如超低温反应所需的方法。一种制备光学活性的2- [6-(羟甲基)-1,3-二恶烷-4-基]乙酸衍生物的方法,其包括在不是的温度下使乙酸衍生物反应 小于-30℃,通过使碱金属或化合价为0的金属作用于衍生物以制备羟基氧代己酸衍生物而制备的烯醇化物,借助于微生物菌株还原该化合物以提供 卤甲基二恶烷基乙酸衍生物,在酸催化剂存在下用缩醛化剂处理该化合物,得到卤代甲基二恶烷基乙酸衍生物,与酰氧基化剂反应,得到酰氧基甲基二恶烷基乙酸 在碱的存在下,将该化合物施用于溶剂分解。

    Dicing tape and a method of dicing a semiconductor wafer
    72.
    发明授权
    Dicing tape and a method of dicing a semiconductor wafer 有权
    切割胶带和切割半导体晶片的方法

    公开(公告)号:US06444310B1

    公开(公告)日:2002-09-03

    申请号:US09371101

    申请日:1999-08-10

    IPC分类号: C09J702

    摘要: A dicing tape comprising a substrate sheet and a pressure-sensitive adhesive layer formed on one surface of the substrate sheet, wherein the substrate sheet comprises an upper layer in direct contact with the pressure-sensitive adhesive layer, an intermediate layer adjacent to the upper layer, and a lower layer adjacent to the intermediate layer, and an anti-extensibility (A) of the upper layer, an anti-extensibility (B) of the intermediate layer, and an anti-extensibility (C) of the lower layer satisfy the equation (I): B

    摘要翻译: 一种切割带,其包括基材片和形成在所述基片的一个表面上的压敏粘合剂层,其中所述基片包括与所述压敏粘合剂层直接接触的上层,与所述上层相邻的中间层 和与中间层相邻的下层,上层的抗延伸性(A),中间层的抗延展性(B)和下层的抗延展性(C)满足 公式(I):公开了作为弹性模量和层厚度的乘积的抗延展性。 本切割带可以均匀且充分地放大切割线,而不受压敏粘合剂的弹性模量的影响,并且在切割线处很少破裂。

    Screen printing machine having a screen position adjusting device
    79.
    发明授权
    Screen printing machine having a screen position adjusting device 有权
    丝网印刷机具有屏幕位置调整装置

    公开(公告)号:US09073301B2

    公开(公告)日:2015-07-07

    申请号:US13643554

    申请日:2011-04-25

    摘要: A screen printing machine configured to move a squeegee by a squeegee moving device along a mask to print solder on a substrate through a through hole of the mask is improved in size and usability. A squeegee-device main body is fixed to a mask frame receiver for holding a mask frame, and a squeegee slide, a squeegee head, and a squeegee-slide driving device are provided on the main body. A position adjusting device including two front/rear-direction adjusting units, one right/left-direction adjusting unit, and one floating support unit is provided between a main body frame of the screen printing machine, and the mask frame receiver and the squeegee-device main body to adjust relative positions of the mask and the substrate by moving the mask frame receiver and the squeegee-device main body together with each other.

    摘要翻译: 丝网印刷机被配置为通过刮板移动装置沿着掩模移动刮板,通过掩模的通孔在基板上印刷焊料,尺寸和可用性得到改善。 刮板装置主体被固定到用于保持面罩框架的面罩框架接收器,并且在主体上设置有刮板滑块,刮板头和刮板滑动驱动装置。 在丝网印刷机的主体框架和面罩框架接收器和刮板接收器之间设置有包括两个前/后方向调整单元,一个左/右方向调整单元和一个浮动支撑单元的位置调整装置, 装置主体,用于通过使掩模框架接收器和刮板装置主体彼此移动来调节掩模和基板的相对位置。