Wafer Stress Analysis Using the 300iSA
Wafer Stress Analysis Using MTI Instruments Proforma 300iSA Wafer processing involves several stages that can lead to mechanical changes in the wafer structure. These changes, or stresses, may result in deformities, making the wafer either unusable or only marginally usable. To evaluate these stresses and determine the wafer's quality, wafer stress measurement is essential. The Proforma 300iSA wafer characterization tool offers a powerful solution for wafer stress analysis. It allows for the analysis of a wafer both before and after processing. By comparing these two states, the Proforma 300iSA effectively evaluates the wafer's stress levels and mechanical alterations, providing [...]
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Laser Triangulation Sensor Principles
Laser triangulation sensors can be divided into two categories based upon their performance and intended use. High-resolution lasers are typically used in displacement and position monitoring applications where high accuracy, stability and low temperature drift are required. Quite frequently these laser sensors are used in process monitoring and closed-loop feedback control systems. Proximity type laser triangulation sensors are much less expensive and are typically used to detect the presence of a part, or used in counting applications. Laser Triangulation Sensor Applications Position Sensing General positioning is the [...]
Webinar Recap: Cable Testing Systems
For over thirty years, Vitrek has been a leading provider of high-quality, multi-functional electrical and high voltage testing equipment. Based in San Diego, CA, Vitrek is an internationally recognized electrical and safety test equipment manufacturer supplying customers in 30 countries. Vitrek designs and manufactures cutting-edge test equipment used in industries such as aerospace, military, medical, automotive, and many more! […]
Weathering the storm: Keys to resiliency in MRO
Weathering the storm: Keys to resiliency in MRO By Ken Ameika It’s no secret that COVID-19 has adversely affected the airline industry, and consequently the MRO and test cell markets. But the impacts are nuanced. Commercial aircraft utilization is way down; meanwhile, freight carrier business is expanding markedly. Operators are spending less; but they still have needs, which often require quick turnaround. It’s been hard for many. But there’s good news: COVID provided lessons that we can all use to make our businesses, or our careers, more resilient to the next major disruption. Diversify Your Business Commercial passenger traffic—or [...]
Capacitance Probes vs. Strain Gauges in Piezo Flexure Stages
Capacitance probes with pico-positioning sensors can be embedded in piezo flexure stages. With minor mounting modifications, these non-contact probes provide significantly greater accuracy than strain gauges. Piezo flexure stages are positioning devices with a high degree of resolution. These motion stages contain a piezoelectric actuator that converts an electrical signal into displacement based on the reverse piezoelectric effect, which is the ability of a piezo electric material to elongate when a voltage is applied. When a voltage (e.g., 0-150 VDC) is applied to the actuator, the stage moves in proportion to the applied voltage. Yet, the exact position remains [...]
Advanced Sensing & Physical Measurement Technology Principles
Overview At MTI Instruments, we offer advanced sensing and physical measurement technology in products that range from basic sensors to complete, fully integrated measurement systems. The technologies we bring to bear to solve measurement applications include capacitance, laser and fiber-optic sensors, which can provide resolution up to 0.01 uin. (2.5 Angstroms). Sensors are available for integration into existing systems or as a complete system level solution Our technologies are available as sensors for integration into existing data acquisition systems or as complete system-level solutions that can be further integrated into a facility wide communication backbone. [...]
Press Release: Vitrek Offers Metrologists Laboratory-Level Accuracy in a Portable, Battery Operated DC Calibrator GalleryPress Release: Vitrek Offers Metrologists Laboratory-Level Accuracy in a Portable, Battery Operated DC Calibrator
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Press Release: Vitrek Offers Metrologists Laboratory-Level Accuracy in a Portable, Battery Operated DC Calibrator
Vitrek Offers Metrologists Laboratory-Level Accuracy in a Portable, Battery-Operated DC Calibrator The XiTRON 2000 Series provides flexibility when calibrating thermocouple, pressure, flow and DC voltage instrumentation; portable DC calibrator’s performance rivals costlier devices traditionally used in lab settings […]
CMP and Capacitance-Based Semiconductor Wafer Measurement GalleryCMP and Capacitance-Based Semiconductor Wafer Measurement
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CMP and Capacitance-Based Semiconductor Wafer Measurement
Chemical mechanical polishing (CMP) uses chemical oxidation and mechanical abrasion to selectively remove material from semiconductor wafers in order to achieve very high levels of planarity. The planarity, or flatness, of these wafers is important for optical lithography, a microfabrication technique that produces integrated circuits (ICs) by transferring a geometric pattern from a photomask to a light-sensitive chemical photoresist. Also known as photolithography or UV lithography, optical lithography can produce a geometric pattern on a thin film or directly onto the substrate. Semiconductor Wafer Measurements: Flatness and Shape During optical lithography, variations in wafer flatness must be smaller than [...]
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