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Laser Welding Glossary of Terms

A – D Terms

  • Active Medical Device – any medical device relying for its functioning on a source of electrical energy or any source of power other than that directly generated by the human body or gravity;
  • Butt Joint – a laser joint in which two metals are joined together without overlapping.
  • Cannula(s) – a cannula is a tube which can be inserted into the body, often for the delivery or removal of fluid
  • Class I Laser – A laser that poses no potential for causing injury to the eye, or is enclosed so as to prevent exposure to the laser beam.
  • Class II Laser – low-power lasers that don’t pose a threat even if directly exposed.
  • Class III Laser – medium-powered lasers that may cause modest injury if directly exposed. Can require protective eye-wear for safety precautions.
  • Class IV Laser – High-powered lasers that pose a high risk for personal injury and require specific safety precautions.
  • Class I Medical Device – these devices present minimal to no harm to individuals and are usually simpler in design from Class II and III devices
  • Class II Medical Device – are subject to more controls than Class I devices and require special labeling requirements
  • Class III Medical Device – these devices need pre-market approval and scientific review as well as controls from Class I and II
  • Clean Room – is an environment that has a low level of environmental pollutants such as dust, airborne microbes, aerosol particles and chemical vapors.
  • Computer Numerical Control (CNC) – Refers to a machine tool which is operated under automatic control, as opposed to manually by an operator.
  • Continuous Wave (CW) Laser Welding – one continuous stream of laser energy used to form the weld.

E – M Terms

  • Glove Box – is a sealed box that is created to allow the manipulation of objects while being in a different atmosphere.
  • Heat-affected Zone – The portion of the base metal which was not melted during brazing, cutting or welding, but whose microstructure and physical properties were altered by the heat.
  • Hermetic Sealing – The process by which packages or containers are sealed to protect critical components within from invasion and contamination by the external elements.
  • Hi-Rel Electronic Packaging – High Reliability Electronic Packaging
  • ISO 9001:2008 – certification that notes our conformance to quality standards in operations management as it relates to quality control and customer service
  • Lap Joint – a laser joint in which two metals are joined together by overlapping one end on another.
  • LASER – an acronym for light amplification by stimulated emission of radiation; an optical device that produces an intense monochromatic beam of coherent light
  • Laser Drilling – the process of repeatedly pulsing focused laser energy at a material, vaporizing layer by layer until a thru-hole is created.
  • Laser Welding – a welding technique used to join multiple pieces of metal through the use of a laser. The beam provides a concentrated heat source, allowing for narrow, deep welds and high welding rates.
  • Metal Hardness – the ability for that metal to resist penetration.

N – Z Terms

  • Nd:YAG – Neodymium-Doped Yttrium Aluminium Garnet – crystal used in lasers
  • Pulse Laser Welding – welding with rapid bursts of laser energy to form the weld.
  • Repeatability – The ability of a machine to perform the same action within a tight tolerance for a given number of times.
  • RGA – Residual Gas Analysis
  • YAG – is Yttrium aluminium garnet, which is a crystal used in lasers