Active vs. Passive Vibration Isolation
January 13, 2020Active vs. passive vibration isolation, understanding the difference is critical to mitigating the impacts of vibration on equipment performance. Passive isolation systems use the natural properties of a spring and a dampener to reduce vibration. Active vibration isolation systems use a control system with integrated sensors and actuators, improving low-frequency performance. Engineers use vibration isolation […]
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How EMI Cancellation Systems Work
January 6, 2020An EMI cancellation system cancels electromagnetic interference (EMI) that degrades electron microscopes performance. Using a sensor, controller, and field canceling loops, the EMI cancellation system measures the ambient magnetic field at the electron beam column and then generates an equal and opposite field thereby eliminates EMI that would otherwise cause interference on the image. The […]
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EMI Interference: Understanding and Mitigating AC and DC Magnetic Fields
October 17, 2019DC and AC magnetic fields create electromagnetic interference (EMI) that can degrade the performance of electron microscopes and e-beam lithography tools. Although AC and DC magnetic fields are related, each impacts equipment differently. There are different strategies to mitigate both, but an AC+DC active magnetic field cancelation system is often the simplest and most cost-effective […]
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Understanding and Mitigating Vibration In Your Facility
August 27, 2019Low-frequency and high-frequency vibration both have a significant impact on electron microscopy laboratories and high-tech manufacturing facilities. These two types of vibration stem from different causes and the strategy for mitigating vibration for each is also different. Vibration Engineering Consultants (VEC) can help you quantify and identify the vibration in your facility and work with […]
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Site Survey: Why Use a Third-Party?
July 16, 2019When purchasing or moving a new electron microscope or process tool, customers have a few options when it comes to deciding who should provide their site survey. The original equipment manufacturer (OEM) will often offer the survey, and organizations sometimes attempt to conduct the survey themselves in-house. In this post, we will discuss the benefits […]
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DC Magnetic Field Disturbances on Electron Microscopes and E-Beam Lithography Tools
January 24, 2018Overview: Changes in DC magnetic field levels near an electron microscope or e-beam lithography tool degrade image quality and inhibit production. A change in DC fields often results in image distortion, a blurred image, or image drift. Common sources of change in DC magnetic fields are variation in the Earth’s magnetic field and the movement […]
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Why a Site Survey is Import
November 21, 2017Let VEC help you make informed decisions and protect against unwanted surprises A site survey for an electron microscope, analytical equipment, or a sensitive manufacturing tool is a critical requirement whenever purchasing a piece of equipment or moving into a new laboratory or cleanroom. Site surveys both help determine if your space meets manufacturer specifications […]
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Reducing Vibration from Mechanical Equipment in an Electron Microscopy Lab
November 21, 2017Discussion: Reducing Vibration from Mechanical Equipment in an Electron Microscopy Lab: Laboratories often have vibrating equipment that causes disturbances on electron microscope images. These sources include chillers, vacuum pumps, transformers, etc.. At VEC, this is a problem that we commonly see in our clients’ laboratories. Following some basic guidelines can help reduce the impact of […]
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