摘要:
Multiple planes within the sample are exposed from a single perspective for contact by an electrical probe. The sample can be milled at a non-orthogonal angle to expose different layers as sloped surfaces. The sloped edges of multiple, parallel conductor planes provide access to the multiple levels from above. The planes can be accessed, for example, for contacting with an electrical probe for applying or sensing a voltage. The level of an exposed layer to be contacted can be identified, for example, by counting down the exposed layers from the sample surface, since the non-orthogonal mill makes all layers visible from above. Alternatively, the sample can be milled orthogonally to the surface, and then tilted and/or rotated to provide access to multiple levels of the device. The milling is preferably performed away from the region of interest, to provide electrical access to the region while minimizing damage to the region.
摘要:
A method of imaging and identifying materials, contamination, fabrication errors, and defects on and below the surface of an integrated circuit (IC) is described. The method may be used in areas smaller than one micron in diameter, and may remove IC layers, either selectively or non-selectively, until a desired depth is obtained. An energetic beam, such as an electron beam, is directed at a selected IC location. The IC has a layer of a solid, fluid or gaseous reactive material, such as a directed stream of a fluorocarbon, formed over the surface of the IC. The energetic beam disassociates the reactive material in or on the region into chemical radicals that chemically attack the surface. The surface may be examined as various layers are selectively removed in the controlled area spot etch, and SEM imaging may then be used to diagnose problems.
摘要:
Charged particle beam equipment for irradiating a charged particle beam stably with low energy while reducing the beam diameter by suppressing aberration of the charged particle beam, and its irradiation method. Charged particle beam equipment in which the quantity, energy and focusing of a charged particle beam can be regulated freely, and its irradiation method are also provided. The charged particle beam equipment (1) comprises a charged particle supply section (3) applied with an acceleration voltage E, a means (4) for deriving and accelerating a charged particle beam B, and a means (5) for focusing the charged particle beam B and irradiating an earthed sample surface S with the charged particle beam B thus focused. The accelerating means (4) and the focusing means (5) comprise bipotential lenses (8, 9). An exit side electrode (8c) and an incident side electrode (9a) are connected with an intermediate acceleration power supply (14) for applying a voltage having a polarity different from that of the charged particle beam B. An incident side electrode (8a) is connected with a deriving power supply (11) and an exit side electrode (9c) is earthed.
摘要:
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.
摘要翻译: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 >
摘要:
An ion implantation system and method are disclosed in which glitches in voltage are minimized by use of a modulated power supply system (230) in the implanter. The modulated power supply system includes a traditional power supply (300) and a control unit (310) associated with each power supply, where the control unit is used to isolate the power supply from an electrode by opening a source switch (321) if a glitch or arc is detected, and to quickly dissipate any charge on the electrode to ground by closing a discharge switch (331). The control unit then restores connectivity between power supply and electrode after the glitch condition has been rectified.