Vacuum chambers and components are specialized vessels that can maintain a high vacuum process environment for manufacturing thin films, microelectronics, optics and materials.  Vacuum chambers usually consist of a series of components such as a bell jar, baseplate, feedthrough collar and service well that together provide a complete chamber.  Complex vacuum chambers are often designed and fabricated on a custom basis to meet an end-user's application requirements.  Gloveboxes, welding chambers, degassing boxes or surface analysis chambers are vacuum chambers pre-engineered for specific applications.  Degassing chambers and gloveboxes typically operate in the rough to low vacuum range for welding, degassing plastics or composite laminates or encapsulating components.