Platsil Gel-10 Lifecast

Platsil Gel-10 Lifecast

Metalorganic vapour phase epitaxy

Metalorganic vapour phase epitaxy (MOVPE) is a chemical vapour deposition method of epitaxial growth of materials, especially compound semiconductors from the surface reaction of organic compounds or metalorganics and metal hydrides containing the required chemical elements. For example, indium phosphide could be grown in a reactor on a substrate by introducing Trimethylindium ((CH3)3In) and phosphine (PH3). Alternative names for this process include organometallic vapour phase epitaxy (OMVPE), metalorganic chemical vapour deposition (MOCVD) and organometallic chemical vapour deposition (OMCVD). Formation of the epitaxial layer occurs by final pyrolisis of the constituent chemicals at the substrate surface. In contrast to molecular beam epitaxy (MBE) the growth of crystals is by chemical reaction and not physical deposition. This takes place not in a vacuum, but from the gas phase at moderate pressures (2 to 100 kPa). As such this technique is preferred for the formation of devices incorporating thermodynamically metastable alloys. It has become the dominant process for the manufacture of laser diodes, solar cells, and LEDs.

ESAVD

ESAVD (Electrostatic Spray Assisted Vapour Deposition) is a technique (developed by a company called IMPT) to deposit both thin and thick layers of a coating onto various substrates. In simple terms chemical precursors are sprayed across an electrostatic field towards a heated substrate, the chemicals undergo a controlled chemical reaction and are deposited on the substrate as the required coating.
ESAVD (branded by IMPT as Layatec) is used for many applications in many markets including:
Thermal barrier coatings for jet engine turbine blades
Various thin layers in the manufacture of flat panel displays and photovoltaic panels
Electronic components
Biomedical coatings
Glass coatings (such as self cleaning)
Corrosion protection coatings
The process has advantages over other techniques for layer deposition (Plasma, Electron-Beam) in that it does not require the use of any vacuum, electron beam or plasma so reduces the manufacturing costs. It also uses less power and raw materials making it more environmentally friendly. Also the use of the electrostatic field means that the process can coat complex 3D parts easily.

Coating

Coating is a covering that is applied to an object. The aim of applying coatings is to improve surface properties of a bulk material usually referred to as a substrate. One can improve amongst others appearance, adhesion, wetability, corrosion resistance, wear resistance, scratch resistance, etc.. They may be applied as liquids, gases or solids.
Examples of coatings:
Coating and printing processes
Chemical vapor deposition and physical vapor deposition
Conversion coating
Anodizing
Chromate conversion coating
Plasma electrolytic oxidation
Oxide (coating)
Phosphate (coating)
Detonation Coating
Paint
Enamel (paint)
Powder coating
Industrial coating
Silicate mineral paint
Fusion bonded epoxy coating (FBE coating)
Pickled and oiled, a type of plate steel coating.
Plasma coatings
Plating
Electroless plating
Electrochemical plating
Polymer coatings, such as Teflon
Sputtered or vacuum deposited materials
Enamel (vitreous)