Abstract:
The present invention includes a system for localization of defects in test samples. A sample is scanned using a particle beam. Some particles interact with conductive elements and may cause the emission of x-rays. Other particles can pass through the sample entirely and generate a current that can be measured. A higher current generated indicates less conductive material at the scan target that may mean a void, dishing, or erosion is present. Localization of a defect can be confirmed using an x-ray emission detector.
Abstract:
Transmission electron microscopes (TEMs) are being utilized more often in failure analysis labs as processing nodes decrease and alternative device structures, such as three dimensional, multi-gate transistors, e.g., FinFETs (Fin Field Effect Transistors), are utilized in IC designs. However, these types of structures may confuse typical TEM sample (or "lamella") preparation as the resulting lamella may contain multiple potentially faulty structures, making it difficult to identify the actual faulty structure. Passive voltage contrast may be used in a dual beam focused ion beam (FIB) microscope system including a scanning electron microscope (SEM) column by systematically identifying non-faulty structures and milling them from the lamella until the faulty structure is identified.
Abstract translation:透射电子显微镜(TEM)更常用于故障分析实验室,因为处理节点减少并且可替代的器件结构(例如三维多栅极晶体管,例如FinFET(鳍式场效应晶体管 )被用于IC设计。 然而,这些类型的结构可能会混淆典型的TEM样品(或“薄片”)制备,因为所产生的薄片可能含有多个可能有缺陷的结构,使得难以识别实际的有缺陷的结构。 被动电压对比可用于包括扫描电子显微镜(SEM)柱的双光束聚焦离子束(FIB)显微镜系统中,通过系统地识别无故障结构并将其从薄片中铣削直至识别出缺陷结构。 p >
Abstract:
A method for nanoprobing a device structure (82) of an integrated circuit includes scanning a primary charged particle beam (25) across a first region of the device structure with at least one probe (24a, 26a, 28a, 30a) proximate to the first region and a second region (91) of the device structure is masked from the primary charged particle beam. The method further includes collecting secondary electrons (35) emitted from the first region of the device structure and the at least one probe to form a secondary electron image (94). The secondary electron image includes the first region and the at least one probe as imaged portions and the second region as a non-imaged portion. Alternatively, the second region may be scanned by the charged particle beam at a faster scan rate than the first region so that the second region is also an imaged portion of the secondary electron image.
Abstract:
An electron microscope and electron microscopy for observing the magnetization of samples with high resolution. The microscope comprises an electron beam projecting means including a scanning coil (3) and objectives lens (4) to irradiate a desired part of a sample (51) with an electron beam (2) emitted from an electron source (1); and a detector means including a quarter wave plate (8), polarizer (9), and photodetector (11) to detect circular-polarized light from the irradiated part of the sample. Since the intensity of the circular-polarized light generated from the sample irradiated with the electron beam varies depending upon the direction of magnetization of the irradiated part and detecting direction of the light, the distribution of magnetization can be measured when the scanned images are observed by using the intensity of the circular-polarized light as luminance signals while scanning the irradiated part on the surface of the sample (51).