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    • 2. 发明授权
    • Method for inspecting filled state of via-holes filled with fillers and
apparatus for carrying out the method
    • 用于检查填充有填充物的通孔的填充状态的方法和用于执行该方法的装置
    • US5015097A
    • 1991-05-14
    • US416934
    • 1989-10-04
    • Mineo NomotoTakanori NinomiyaHiroya KoshishibaToshimitsu HamadaYasuo Nakagawa
    • Mineo NomotoTakanori NinomiyaHiroya KoshishibaToshimitsu HamadaYasuo Nakagawa
    • G01N21/88G01N21/956G06T7/00H05K3/00H05K3/40
    • G06T7/0004G01N21/95692G06T7/604G01N2021/95653G01N21/8806G06T2207/30141
    • A method for inspecting the filled state of a plurality of via-holes which pass through a non-conductive circuit board and are filled with a conductive substance and an apparatus for carrying out the method are disclosed.The surface of the circuit board is illuminated in two directions to generate shadows depending on the concave or convex state of the fillers in a plurality of via-holes. An optical image of the illuminated surface of the circuit board is detected. Each edge of the two shadow areas, which exist in the detected optical image and are generated in one via-hole by light irradiation in two directions, is detected. Whether the filler in this one via-hole is in the concave state or convex state is identified according to the mutual position relationship of the detected edges. The length of each shadow area is detected, and whether the concave state or convex state of the filler is within a predetermined allowance is decided according to the detection results. The area of the image of the filler is detected according to differences between the brightness of the board surface or of the via-hole wall and the brightness of the filler in the via-hole in the detected optical image, and whether the filler is lacking or not is decided according to the detection result.
    • 公开了一种用于检查通过非导电电路板并填充有导电物质的多个通孔的填充状态的方法和用于实施该方法的装置。 电路板的表面在两个方向上被照亮,以产生取决于多个通孔中的填料的凹凸状态的阴影。 检测电路板的被照射表面的光学图像。 检测存在于所检测的光学图像中并且在两个方向上通过光照射在一个通孔中产生的两个阴影区域的每个边缘。 根据检测到的边缘的相互位置关系来识别该通孔中的填充物是处于凹状还是凸状状态。 检测每个阴影区域的长度,根据检测结果确定填料的凹状或凸状状态是否处于预定的余量内。 根据检测到的光学图像中的基板表面或通孔壁的亮度与通孔中的填充物的亮度之间的差异来检测填充物的图像的面积,以及填充材料是否缺乏 是否根据检测结果决定。
    • 4. 发明授权
    • Method and apparatus for detecting photoacoustic signal to detect
surface and subsurface information of the specimen
    • 用于检测光声信号以检测样品的表面和地下信息的方法和装置
    • US5781294A
    • 1998-07-14
    • US548015
    • 1995-10-25
    • Toshihiko NakataTakanori NinomiyaHilario Haruomi KobayashiKazushi Yoshimura
    • Toshihiko NakataTakanori NinomiyaHilario Haruomi KobayashiKazushi Yoshimura
    • G01N21/17G01N29/06G01N29/24G01N29/34G01B9/02
    • G01N29/346G01N21/1702G01N29/0609G01N29/2418G01N2291/012
    • A method and an apparatus for detecting a photoacoustic signal are provided which irradiate an excitation light beam, modulated by a desired frequency, simultaneously to a plurality of points being measured on a surface of a sample, irradiate the excitation light and a probe light simultaneously to the plurality of the points being measured, detect an interference light of a reflected light beam of the probe light and a specified reference light with a detector made up of a plurality of photoelectric converting elements corresponding to the respective points being measured, the detector being in conjugate relation with the surface of the sample, detect a thermal distortion of the frequency component equal to the intensity-modulated frequency at the plurality of the points being measured from the interference light intensity signal detected by the detector, and detect information relative to the surface and the subsurface of the measuring points on the sample from the thermal distortion of the frequency component. A plurality of measuring points on a specimen are excited simultaneously with an intensity-modulated flat light beam and the thermal expansion displacements of the measuring points are detected simultaneously by interference between a flat probe light beam and a flat reference light beam to detect photothermal displacement signals representing the photothermal displacements of the plurality of measuring points simultaneously.
    • 提供了一种用于检测光声信号的方法和装置,其将在期望频率下调制的激发光束同时照射到在样品表面上测量的多个点,同时将激发光和探针光照射到 测量的多个点,利用由与被测量的各个点相对应的多个光电转换元件组成的检测器检测探测光的反射光束和指定参考光的干涉光,检测器处于 与样品表面的共轭关系,根据由检测器检测到的干涉光强度信号测量的多个点处,检测与等于强度调制频率的频率成分的热失真,并检测相对于表面的信息 和样品上的测量点的地表从热失真 的频率分量。 试样上的多个测量点与强度调制的平坦光束同时激发,并且通过平坦探测光束和平坦参考光束之间的干涉同时检测测量点的热膨胀位移,以检测光热位移信号 同时表示多个测量点的光热位移。
    • 6. 发明授权
    • Inspection method for soldered joints using x-ray imaging and apparatus
therefor
    • 使用X射线成像的焊接接头的检查方法及其设备
    • US5463667A
    • 1995-10-31
    • US53240
    • 1993-04-28
    • Toshiaki IchinoseTakanori NinomiyaAsahiro KuniKozo NakahataToshimitsu HamadaToshihiko Ayabe
    • Toshiaki IchinoseTakanori NinomiyaAsahiro KuniKozo NakahataToshimitsu HamadaToshihiko Ayabe
    • G01N23/04H01L21/66H01L23/50H05K3/34H05K13/08
    • H05K13/08G01N23/04
    • A method and an apparatus for inspecting a soldered joint with an X-ray, the soldered joint being formed by soldering a lead to a surface of a substrate. The method may include moving the substrate so as to move the surface of the substrate in an XY plane to position the soldered joint at a desired position in the XY plane, rotating the substrate so as to rotate the surface of the substrate in the XY plane to position the soldered joint at a desired orientation in the XY plane, rotating an X-ray source and a detector about the soldered joint in both of two mutually perpendicular planes perpendicular to the XY plane while maintaining the X-ray source and the detector at fixed positions relative to each other to establish a desired oblique irradiation angle between an X-ray from the X-ray source and the lead on the surface of the substrate, irradiating the soldered joint with the X-ray from the X-ray source at the desired oblique irradiation angle such that the X-ray is transmitted through the soldered joint and the substrate, detecting the X-ray transmitted through the soldered joint and the substrate with the detector, the detector producing an output signal indicative of the detected X-ray, and determining a condition of the soldered joint based on the output signal of the detector. The apparatus may operate in the same fashion.
    • 一种用X射线检测焊接接头的方法和装置,所述焊接接头通过将引线焊接到基板的表面而形成。 该方法可以包括移动基板以使基板的表面在XY平面中移动,以将焊接接头定位在XY平面中的期望位置,旋转基板以使基板的表面在XY平面中旋转 将焊接接头定位在XY平面中所需的取向上,使X射线源和检测器围绕焊接接头在与XY平面垂直的两个相互垂直的平面中旋转,同时将X射线源和检测器保持在 固定位置,以建立来自X射线源的X射线与衬底表面上的铅之间的期望的倾斜照射角度,用X射线源的X射线照射焊接接头 所需的倾斜照射角度,使得X射线透射通过焊接接头和基板,通过检测器检测透过焊接接头和基板的X射线,检测器产品 选择表示检测到的X射线的输出信号,以及基于检测器的输出信号确定焊接接头的状态。 该装置可以以相同的方式操作。