There are many industry terms in the coating industry, such as according to our daily, need to be coated things, generally called objects or products, but the vacuum coating industry is not so called, we are generally called substrate. The industry is not the same, the name and terminology are not the same, the following vacuum compendium for you to collect some pvd coating machine coating industry terms, hope to help you:

standard ambient condition: Temperature is 20℃, relative humidity is 65%, atmospheric pressure is 101325Pa=1013.25mbar=760Torr.
2. standard reference conditions for gases: Temperature is 0℃, pressure is 101325Pa.
3. pressure (pressure) p pressure: When a gas molecule passes through an imaginary plane, the momentum change rate along the direction of the normal line of the plane is divided by the area of the plane or the normal component of the force exerted by the gas molecule on the surface of its container wall, divided by the surface area. Note: The term "pressure" is used only when the gas is at rest or at static pressure when it is flowing steadily.
4. pascal Pa pascal: International System of Units of pressure, 1Pa=1N/m2.
5. Tortorr torr: pressure unit, 1Torr=1/760atm.
6. standard atmosphere: Pressure unit, 1atm=101325Pa.
7. mbar millibar: Pressure unit, 1mbar=102Pa.
8. partial pressure: The pressure of a certain component in the gas mixture.
9. total pressure: The total pressure of all components in the gas mixture.
10. vacuum: The state of gas below the ambient atmospheric pressure in a specified space.
11. degree of vacuum: indicates the thin degree of gas in the vacuum state, usually expressed by the pressure value.
13. gas: A substance that is not bound by the intermolecular forces and can freely occupy any space. Note: In vacuum technology, the term "gas" is applied loosely to non-condensable gases and vapors.
14. n, m-3 number density of molecules: At a certain instant, the number of molecules in the volume around a point in the gas, divided by the volume.
15. The mean free path, λ, m mean free path: the distance traveled by each successive second collision between a molecule and other gas molecules is called the free path. The average of quite a few different free paths is called the mean free path.
16. collision rate: The average number of collisions caused by a molecule (or other specified particle) moving relative to other gas molecules (or other specified particles) in a given time interval, divided by the time. This average number of collisions should be obtained with a sufficient number of molecules and a long enough time interval.
17. χvolume collision rate: The average number of collisions between gas molecules in the space around a specified point in a given time interval, divided by the time and the volume in the space range. The time interval and volume taken should not be too small.
G quantity of gas: The product of the volume occupied by an ideal gas in equilibrium by its pressure. This value must indicate the gas temperature or the value when converted to 20 ° C. Note: The gas quantity refers to 2/3 of the intrinsic energy (or potential energy) of the gas in the volume occupied by the gas.
diffusion of gas: The movement of a gas through another medium due to a concentration gradient. The medium can be another gas (in which case the diffusion is called mutual diffusion) or a condensable substance.
D diffusion coefficient; d diffusion coefficient; diffusivity: The ratio of the absolute value of the mass flow rate through a unit area to the normal concentration gradient of that unit area.
pvd coating machine industry terminology is very much, only in-depth in this field, we can really contact and appreciate the relevant professional terms and knowledge, in order to understand the industry and the gap between industries.