How to Reduce Inconsistent Wafer Measurements
How to Reduce Inconsistent Wafer Measurements Avoid 5 Common Mistakes That Destroy Wafer Measurement Accuracy You take pride in your work. You’re precise, accurate and depend on the right metrology equipment. Then why are your bare semi-conductor wafer measurements sometimes inconsistent? It may be something you’re doing (or not doing) — without realizing it. MTI Instruments discovered there are five common mistakes that engineers and users make with bare semi-conductor wafers. The “Five Mistakes Made When Taking Semiconductor Wafer Measurements” Tech-Brief details these all-too-typical errors that adversely impact measurements. [...]
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 [...]
Five Common Mistakes with Semiconductor Wafer Measurement GalleryFive Common Mistakes with Semiconductor Wafer Measurement
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Five Common Mistakes with Semiconductor Wafer Measurement
Semiconductor wafer measurement requires a high degree of precision. The right metrology equipment and inspection processes are important, but so is procedural consistency and attention to detail. If you’re not getting the results you want, it’s time to look beyond the measurements. With bare semiconductor wafers, users need to avoid these five common mistakes. Mistake #1 | Turning the Device Off Most users turn on metrology devices only when it’s time to use them. As soon as semiconductor wafer measurement is complete, the devices are turned off. This reduces electricity consumption but also introduces thermal instability that can cause [...]
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. [...]
Capacitance Probes: Five Things You Need to Know
Capacitance probes are non-contact measurement devices with a capacitance sensor inside a protective shell or housing. They use cables and connectors to integrate with amplifiers and are an important part of capacitance measurement systems. By using capacitance, engineers can measure physical parameters such as vibration, pressure, liquid levels, metal contamination, and seismic activity – just to name a few. There’s a lot to know about capacitance probes, but five key facts to understand. Capacitance probes are highly accurate and very stable. They’re better than older devices and competing technologies. They require little calibration and support miniaturization and embedding. They [...]
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Capacitance Sensors: Three Things You Need to Know
Capacitance sensors are precision measurement tools for process automation, quality control, and tool automation control. They’re used in a many different industries and are suitable for virtually any application where accuracy is paramount. There’s a lot to know about capacitive sensors (as they’re sometimes called), but engineers need to start with three key questions. What are the parameters to specify when selecting a capacitance sensor? What are factors to consider when embedding a capacitive sensor in an industrial application? What is the future of capacitance-based measurement products? MTI Instruments has been providing U.S.-made capacitance sensor systems for over 50 [...]
How to Implement a Complete Digital Closed Loop Control System
Co-authored by Don Welch, Director of Engineering and Business Development Cory Bufi, Software Engineer Isaac Abbott,Product Innovation Engineer – PBS Group Request Whitepaper Today’s electronic designs often call for reasonably fast and precise positioning of miniature components for process deposition elements such as ink jet nozzles, 3D printing elements etc. And as process control moves from mm positioning to micron to sub-micron positioning it becomes necessary to monitor and control positioning actuators such as piezo flexure stage and voice coil motors. Open loop control of the positioning stage may have been adequate in non-precision applications but piezo electric [...]
Measuring Brake Rotor Thickness Variation with Capacitive Sensing GalleryMeasuring Brake Rotor Thickness Variation with Capacitive Sensing
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Measuring Brake Rotor Thickness Variation with Capacitive Sensing
Brake rotor thickness variation, or disc thickness variation (DTV), causes uneven wear to brake rotors, disc-shaped automotive parts that are squeezed between brake pads to slow or stop a vehicle’s wheels. When a brake rotor has areas of different thickness, the amount of clamping force that’s applied across the rotor’s surface varies. These differences in clamping force lead to difference in torque, and the results may include brake shuddering, pulsating, or vibration. Even under normal driving conditions, brake rotors are subjected to extreme conditions that can cause performance-related issues. To ensure that brake rotors can perform [...]
About MTI Instruments
About MTI Instruments About MTI Instruments MTI Instruments is a US-based manufacturer of precision tools, systems and solutions for clients requiring the precise measurement and control of products and processes, and for the development and implementation of automated manufacturing, assembly, and complex machinery operation. Our product solutions are used in: Engine vibration analysis systems for military and commercial aircraft applications Industrial manufacturing/production markets Research, design and process development market. Quality Policy MTI’s policy is to provide professional and efficient service to meet or exceed each of our customers’ requirements; providing products services of the highest quality. MTI maintains [...]