Method of applying a polymer thick-film resistive paste for making polymer thick-film resistor having improved tolerances
    3.
    发明授权
    Method of applying a polymer thick-film resistive paste for making polymer thick-film resistor having improved tolerances 失效
    施加聚合物厚膜电阻浆料以制备具有改善的公差的聚合物厚膜电阻器的方法

    公开(公告)号:US07575778B2

    公开(公告)日:2009-08-18

    申请号:US10913869

    申请日:2004-08-07

    IPC分类号: B05D5/12 B05D3/12

    摘要: The present invention teaches formulations, apparatus and a method of applying high thixotropic index polymer thick-film resistive pastes for making polymer thick-film resistors with improved tolerances by providing a squeegee with a blade tilted at an angle of 10° to 85° to the surface of the printed circuit board thus causing a fluid rotational motion within the bead of the polymer thick-film resistive paste as the squeegee blade moves relative to the printed circuit board. This rotational motion increases the shear strain rate experienced by the paste within the bead and results in a more effective filling of the resistor-shaped cavity without including air bubbles, experiencing elastic recovery of the paste and, without surface fractures of the paste.

    摘要翻译: 本发明教导了施加高触变性折射率聚合物厚膜电阻浆料以制备具有改进的公差的聚合物厚膜电阻器的配方,设备和方法,其中提供了刮刀,其具有与10°至85°的角度倾斜 因此当刮板相对于印刷电路板移动时,印刷电路板的表面因此导致聚合物厚膜电阻浆料的珠粒内的流体旋转运动。 该旋转运动增加了焊道内的焊膏所经历的剪切应变速率,并且导致电阻器形状的空腔的更有效的填充,而不包括气泡,经历糊状物的弹性恢复,并且没有粘合剂的表面裂缝。

    Polymer thick-film resistive paste, a polymer thick-film resistor and a method and an apparatus for the manufacture thereof
    4.
    发明申请
    Polymer thick-film resistive paste, a polymer thick-film resistor and a method and an apparatus for the manufacture thereof 失效
    聚合物厚膜电阻膏,聚合物厚膜电阻器及其制造方法和装置

    公开(公告)号:US20050051360A1

    公开(公告)日:2005-03-10

    申请号:US10913869

    申请日:2004-08-07

    摘要: The present invention teaches formulations, apparatus and a method of applying high thixotropic index polymer thick-film resistive pastes for making polymer thick-film resistors with improved tolerances by providing a squeegee with a blade tilted at an angle of 10 to 85 to the surface of the printed circuit board thus causing a fluid rotational motion within the bead of the polymer thick-film resistive paste as the squeegee blade moves relative to the printed circuit board. This rotational motion increases the shear strain rate experienced by the paste within the bead and results in a more effective filling of the resistor-shaped cavity without including air bubbles, experiencing elastic recovery of the paste and, without surface fractures of the paste.

    摘要翻译: 本发明教导了施加高触变性折射率聚合物厚膜电阻浆料以制备具有改进的公差的聚合物厚膜电阻器的配方,设备和方法,其中提供了一个刮板,叶片以10至85°的角度倾斜到 因此当印刷电路板相对于印刷电路板移动时,导致聚合物厚膜电阻浆料的珠粒内的流体旋转运动。 该旋转运动增加了焊道内的焊膏所经历的剪切应变速率,并且导致电阻器形状的空腔的更有效的填充,而不包括气泡,经历糊状物的弹性恢复,并且没有粘合剂的表面裂缝。