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    • 25. 发明授权
    • Testing flat panel display plates using high frequency AC signals
    • 使用高频交流信号测试平板显示板
    • US06987400B2
    • 2006-01-17
    • US10442556
    • 2003-05-20
    • Guillermo L. Toro-Lira
    • Guillermo L. Toro-Lira
    • G01R31/305
    • G09G3/006
    • Methods of and apparatus for detecting pixel element defects in flat panel display (FPDs). Floating pixel elements (FPes) of uncompleted active plates in a manufacturing process are activated with high frequency AC test signals having frequencies higher than frequencies encountered by pixels of completely manufactured FPDs during normal display operation. Application of such high frequency test signals allows detection of pixel defects of pixel elements that exhibit an electrical open circuit at normal display operation frequencies. Because the methods and apparatus allow testing prior to FPD plates being completely manufactured and prior to FPD final assembly, pixel defects can be detected early in the display manufacturing process, thereby resulting in a substantial reduction in production costs.
    • 用于检测平板显示器(FPD)中的像素元件缺陷的方法和装置。 在正常显示操作期间,制造过程中未完成的有源板的浮动像素元件(FP)由具有高于完全制造的FPD的像素频率的高频AC测试信号激活。 这种高频测试信号的应用允许检测在正常显示操作频率下呈现电开路的像素元件的像素缺陷。 由于方法和装置允许在FPD板完全制造之前并且在FPD最终组装之前进行测试,因此可以在显示器制造过程的早期检测到像素缺陷,从而导致生产成本的显着降低。
    • 26. 发明授权
    • Method and apparatus for detecting electrical failures on a die through maximizing passive voltage contrast on its surface
    • 用于通过最大化其表面上的被动电压对比来检测管芯上的电气故障的方法和装置
    • US06980011B1
    • 2005-12-27
    • US10757694
    • 2004-01-13
    • Vijay ChowdhuryJames Hahn
    • Vijay ChowdhuryJames Hahn
    • G01R31/302G01R31/305G01R31/307
    • G01R31/307
    • A method and apparatus for maximizing passive voltage contrast on the surface of a die and then using the maximized passive voltage contrast to identify electrical failures in the die. The method employs a primary electron beam to scan the surface of the die. In response, secondary electrons are emitted from the die and then captured by a secondary electron detector. The density of secondary electrons is further modulated by a passive voltage near the die surface. To enhance the passive voltage contrast on the die surface, the incident angle of the primary electron beam is adjusted with respect to the die, the passive voltage contrast reaching a maximum at an incident angle of about 75° or above. With such enhanced contrast, an image depicting the magnitude of the secondary electron current can be used to detect electrical failures in the die.
    • 一种用于最大化管芯表面上的被动电压对比度,然后使用最大化无源电压对比度来识别管芯中的电气故障的方法和装置。 该方法采用一次电子束扫描模具的表面。 作为响应,二次电子从管芯发射,然后被二次电子检测器捕获。 二次电子的密度由芯片表面附近的被动电压进一步调制。 为了增强芯片表面上的被动电压对比度,相对于裸片调整一次电子束的入射角,无源电压对比度在约75°或更高的入射角处达到最大值。 通过这种增强的对比度,可以使用描绘二次电子电流的大小的图像来检测模具中的电气故障。
    • 29. 发明授权
    • Inspection method and apparatus for circuit pattern of resist material
    • 抗蚀材料电路图案检测方法及装置
    • US06952105B2
    • 2005-10-04
    • US10620702
    • 2003-07-17
    • Zhaohui ChengMari Nozoe
    • Zhaohui ChengMari Nozoe
    • H01L21/66G01N23/00G01R31/302G01R31/305G06T1/00H01J37/04H01J37/147H01J37/28
    • H01J37/28H01J2237/2817
    • A pattern inspecting technique, depending on the kind of materials, can reduce damage including shrinkage to materials when the materials are prone to such damage as shrinkage and spoilage caused by electron beam irradiation. This is accomplished by scanning a sample with a primary electron beam, detecting secondary electrons generated, or electrons reflected from the semiconductor device, or both the former and latter electrons, and converting the electrons into signals, and transforming the signals into an image, displaying the image, and detecting defective spots in the circuit pattern of the sample. The irradiation density (dose per unit area) of the electron beam is monitored and limited depending on the kind of material of the circuit pattern under inspection and the inspecting conditions, and damage, such as shrinkage and spoilage to the materials during electron beam irradiation, is reduced to an allowable range.
    • 取决于材料种类的图案检查技术可以减少材料收缩时的损伤,当材料容易受到由电子束照射引起的收缩和变质等损害时。 这是通过用一次电子束扫描样品,检测产生的二次电子或从半导体器件反射的电子,或者前者和后面的电子,并将电子转换为信号,并将信号变换为图像,显示 图像,并检测样品的电路图案中的缺陷点。 电子束的照射密度(每单位面积的剂量)根据检查中的电路图案的材料的种类和检查条件进行监测和限制,并且在电子束照射期间对材料的收缩和变质等损害, 减少到允许范围。