Lab Instruments - Sample Preparation
Sputter CoaterManufacturer: Technics
Model: Hummer VI Description: Deposits a conductive thin film coating. Sputter deposition is usually uniform and reproducible, yielding fine grain, adherent films. Used for SEM sample preparation. Key Features: Average deposition thickness of 300 Å Au, up to 9 samples at a time. Materials Restrictions: Sample must be dry, and low outgassing substrates, and be stable under mechanical vacuum. Au and Au/Pd are available for deposition. General Information: A sputter coater is used to deposit a thin film of material on top of a sample. Gold and gold/palladium are commonly sputter coated materials. The material which coats the sample are placed in the sputter coater as "targets."
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Carbon Coater
Manufacturer: Cressington
Model: 108C Description: Deposits a conductive thin film of carbon. Used for SEM and EDS sample preparation. Key Features: Feedback-controlled rod evaporation system gives multiple evaporations of ~20nm thickness without need for rod shaping or adjustment. Ability to coat 12 SEM/EDS pin-mounted samples at a time. Fitted with a MTM-10 High Resolution Thickness Monitor. Resolution is better than 0.1nm for carbon and able to give 5% reproducibility of coating thickness in the 15-25nm range. Materials Restrictions: Sample must be dry, and low outgassing substrates, and be stable under mechanical vacuum. General Information: A carbon coater is used to coat non-conductive specimens prior to SEM X-ray analysis. High purity stepped carbon rods are used to provide superior coating quality that is usable at high magnifications.
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Vacuum OvenManufacturer: Fisher Scientific
Model: Isotemp 281A Description: Used for the heat materials, to high temperatures in a vacuum to carry out processes such as brazing, sintering and heat treatment. Key Features: 10 inches wide, 1000-watt wraparound element, inlet outlet valves for inert gas air replacement. Integrated mechanical vacuum pump capable of pressures below 500 mTorr. Materials Restrictions: Sample must fit in the internal dimensional limitation of 9.5W x 11D x 9.5H inches. General Information: Vacuum ovens are used to dry samples which contain water or other solvents before they are placed in a scanning electron microscope. If water is brought into the vacuum system of the SEM, it can harm the instrument. Samples are often pumped down under vacuum overnight.
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SonicatorManufacturer: Branson
Model: 2510 Ultrasonic Cleaner Description: Applies sonic vibrations to a sample in an ultrasonic bath in order to agitate particles in or on a sample, for various purposes such as lithography and sample cleaning. Key Features: Sonicates at 40 kHz frequency, adjustable temperature from 20-60 ˚C, degasification, 99 min digital timer, 60 min mechanical timer and heat switch Materials Restrictions: Sample must within the dimensional limitation of the 9.5L x 5.5W x 4H inch tank. General Information: Sonicators are used to clean samples, and aid in mixing solutions. In the lithography process a sonicator is often used to assist with metal liftoff. Large sonicators are sometimes used in auto shops to clean car parts.
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