Parylene N
Di-p-xylylene
Parylene N is a polymer manufactured from di-p-xylylene, a dimer synthesized from p-xylylene. Di-p-xylylene,surplus properly known as 2.2]paracyclophane,namely made from p-xylylene within several steps involving bromination, amination and elimination.
Parylene N is an unsubstituted molecule Heating 2.2]paracyclophane under low oppression (0.01 one Torr) conditions gives climb to a diradical category which polymerizes meantime deposited aboard a surface. Until the monomer comes into contact with a surface it namely among a gaseous phase and can access the plenary exposed surface. It has a diversity of uses. In electronics, chemical vapor deposition at inexpensive cruelty onto circumference boards produces a thin, even conformal polymer coating.
Other derivatives
There are a numeral of derivatives and isomers of parylene including: Parylene N (hydrocarbon), Parylene C (one chlorine team per repeat element Parylene D (two chlorine teams per repeat unit Parylene AF-4 (generic designate aliphatic flourination four atoms), Parylene SF (AF-4, Kisco production Parylene HT (AF-4,coach tote outlet, SCS production Parylene A (one amine per repeat element Kisco production Parylene AM (one methylene amine crew per repeat element Kisco product Parylene VT-4 (generic appoint fluorine atoms aboard the aromatic ring), Parylene CF (VT-4, Kisco product and Parylene X (a cross-linkable version,never commercially affable.
History
Parylene mutation began in 1947,while Michael Szwarc discovered the polymer as one of the thermal decomposition products of a common solvent p-xylene at a temperature between 700 and 900 C. Szwarc first postulated the monomer to be para-xylylene which he confirmed by reacting the vapors with iodine and observing the para-xylylene di-iodide as the only product The reaction yield was only a few percent and a more effective route was found afterward along William F. Gorham at Union Carbide. He deposited parylene movies onward the thermal decomposition of di-p-xylylene by 550 C and among vacuum beneath 1 Torr. This process did never require a solvent and resulted in chemically resistant films free from pinholes. Union Carbide commercialized a parylene coating system surrounded 1965.
Characteristics and advantages
Hydrophobic, chemically resistant coating with comely barrier properties for inorganic and organic middling strong sours nipping solutions, gases and water vapor
Low leakage current and a cheap dielectric constant average in-plane and out-of-plane: 2.67 parylene N and 2.five parylene AF-4, SF, HT)
A biostable, biocompatible coating; FDA ratified for motley applications
Dense pinhole free, with thickness above 1.4 nm
Thin extremely conformal transparent coating
Coating without temperature load of the substrates as coating takes location at ambient temperature in the vacuum
Highly corrosion resistant
Completely homogeneous surface
Oxidatively settled up to 350 C (Parylene AF-4, SF, HT)
Low intrinsic thin membrane accent deserving apt its dormitory temperature deposition
Low coefficient of friction (AF-4, HT, SF)
Very low permeability to gases
Typical applications
Parylene films have been used in different applications, including
Hydrophobic coating moisture barriers, e,coachfactory2012outlet.org.g.for biomedical hoses)
Barrier wafers (e.g.for percolate diaphragms, valves)
Microwave electronics
Sensors among coarse environment (e.g. automotive fuel/air sensors)
Electronics for zone peregrination and military
Corrosion protection for metallic surfaces
Reinforcement of micro-structures
Abrasion protection
Protection of plastic, rubber, etc. from detrimental environmental conditions
Reduction of friction,as guiding catheters, acupuncture needles and Microelectromechanical systems.
Dissolving deuterated polyethylene for making nuclear targets Related articles:
Di-p-xylylene
Parylene N is a polymer manufactured from di-p-xylylene, a dimer synthesized from p-xylylene. Di-p-xylylene,surplus properly known as 2.2]paracyclophane,namely made from p-xylylene within several steps involving bromination, amination and elimination.
Parylene N is an unsubstituted molecule Heating 2.2]paracyclophane under low oppression (0.01 one Torr) conditions gives climb to a diradical category which polymerizes meantime deposited aboard a surface. Until the monomer comes into contact with a surface it namely among a gaseous phase and can access the plenary exposed surface. It has a diversity of uses. In electronics, chemical vapor deposition at inexpensive cruelty onto circumference boards produces a thin, even conformal polymer coating.
Other derivatives
There are a numeral of derivatives and isomers of parylene including: Parylene N (hydrocarbon), Parylene C (one chlorine team per repeat element Parylene D (two chlorine teams per repeat unit Parylene AF-4 (generic designate aliphatic flourination four atoms), Parylene SF (AF-4, Kisco production Parylene HT (AF-4,coach tote outlet, SCS production Parylene A (one amine per repeat element Kisco production Parylene AM (one methylene amine crew per repeat element Kisco product Parylene VT-4 (generic appoint fluorine atoms aboard the aromatic ring), Parylene CF (VT-4, Kisco product and Parylene X (a cross-linkable version,never commercially affable.
History
Parylene mutation began in 1947,while Michael Szwarc discovered the polymer as one of the thermal decomposition products of a common solvent p-xylene at a temperature between 700 and 900 C. Szwarc first postulated the monomer to be para-xylylene which he confirmed by reacting the vapors with iodine and observing the para-xylylene di-iodide as the only product The reaction yield was only a few percent and a more effective route was found afterward along William F. Gorham at Union Carbide. He deposited parylene movies onward the thermal decomposition of di-p-xylylene by 550 C and among vacuum beneath 1 Torr. This process did never require a solvent and resulted in chemically resistant films free from pinholes. Union Carbide commercialized a parylene coating system surrounded 1965.
Characteristics and advantages
Hydrophobic, chemically resistant coating with comely barrier properties for inorganic and organic middling strong sours nipping solutions, gases and water vapor
Low leakage current and a cheap dielectric constant average in-plane and out-of-plane: 2.67 parylene N and 2.five parylene AF-4, SF, HT)
A biostable, biocompatible coating; FDA ratified for motley applications
Dense pinhole free, with thickness above 1.4 nm
Thin extremely conformal transparent coating
Coating without temperature load of the substrates as coating takes location at ambient temperature in the vacuum
Highly corrosion resistant
Completely homogeneous surface
Oxidatively settled up to 350 C (Parylene AF-4, SF, HT)
Low intrinsic thin membrane accent deserving apt its dormitory temperature deposition
Low coefficient of friction (AF-4, HT, SF)
Very low permeability to gases
Typical applications
Parylene films have been used in different applications, including
Hydrophobic coating moisture barriers, e,coachfactory2012outlet.org.g.for biomedical hoses)
Barrier wafers (e.g.for percolate diaphragms, valves)
Microwave electronics
Sensors among coarse environment (e.g. automotive fuel/air sensors)
Electronics for zone peregrination and military
Corrosion protection for metallic surfaces
Reinforcement of micro-structures
Abrasion protection
Protection of plastic, rubber, etc. from detrimental environmental conditions
Reduction of friction,as guiding catheters, acupuncture needles and Microelectromechanical systems.
Dissolving deuterated polyethylene for making nuclear targets Related articles:
全站熱搜
留言列表
