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Parylene coatings are completely conformal, of uniform
thickness and pinhole free. This is achieved by a unique
vapor deposition polymerization process. The advantage of
this process is that the coating forms from a gaseous
monomer without an intermediate liquid stage. As a result,
component configurations with sharp edges, points, flat
surfaces, crevices or exposed internal surfaces are coated
uniformly without voids.
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- High reliability - Suitable for military or commercial applications
- Light weight - Compared to other coatings
- Stress-free coatings - Sensitive circuitry unchanged by coating
- Low coefficient of friction - Use as a dry film lubricant
- Transparency - Thin films can be of optical quality
- Out-gassing - Virtually none
- Outstanding barrier - Very low permeability to moisture and gases
- Fungus and bacteria resistance - Excellent
- Mechanical - High tensile and yield strength
- Truly conformal - Uniform thickness on all
surfaces
- Wide temperature range - From -200oC
to +200oC
- Radiation resistance - Suitable for space
applications
- Bio-compatible - Inertness invaluable for
medical applications
- Particle retention - Upgrades electronic and
mechanical devices
- Solvent resistance - Insoluble in common
solvents
- Acid and base resistance - Resists attack from
exposure
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Electrical breakdown - Extremely high dielectric strength
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Typical Properties of GALXYL®
Films
Data recorded following
appropriate ASTM methods.
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GALXYL®
Parylene N
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GALXYL®
Parylene C
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GALXYL®
Parylene D
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Typical Physical & Mechanical Properties |
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Tensile strength, psi
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65,000
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10,000
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11,000
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Tensile strength, MPa
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45
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69
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76
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Yield strength, psi
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6,300
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8,000
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9,000
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Yield strength, MPa
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2,400
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3,200
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2,800
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Elongation at break, %
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40
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200
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10
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Density, g/cm3
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1.110
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1.289
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1.418
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Coefficient of friction: static
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0.25
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0.29
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0.33
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dynamic
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0.25
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0.29
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0.31
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Water absorption, % (24 hr)
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0.01
(0.019")
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0.06
(0.029")
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Index of refraction, nD23
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1.661
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1.639
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1.669
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Typical Electrical
Properties
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Dielectric
strength, short time (Volts/mil at 1 mil)
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7,000
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6,800
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5,500
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Volume resistivity, 23°C,
50% RH (Ohm-cm), see chart below
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1x1017
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6x1016
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2x1016
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Surface resistivity, 23°C,
50% RH (Ohm-cm)
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1015
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1015
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5x1016
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Dielectric constant: 60 Hz
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2.65
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3.15
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2.84
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1,000 Hz see
chart below |
2.65
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3.10
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2.82
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1,000,000 Hz |
2.65
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2.95
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2.80
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Dissipation factor: 60Hz
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0.0002
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0.020
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0.004
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1,000 Hz see chart below
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0.0002
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0.019
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0.003
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1,000,000 Hz
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0.0006
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0.013
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0.002
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Typical Barrier Properties
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Gas Permeability *
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Nitrogen
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7.7
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0.95
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4.5
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Oxygen
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30
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7.1
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32
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Carbon dioxide
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214
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7.7
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13
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Hydrogen sulfide
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795
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13
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1.45
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Sulphur dioxide
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1,890
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11
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4.75
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Chlorine
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74
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0.35
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0.55
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Moisture Vapor Transmission**
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1.50
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0.14
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0.25
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* cm3-mil/100 in2-24hr-atm (23ºC)
** g-mil/100 in2-24hr, 37ºC, 90% RH 1 mil = 1/1000
in = 25.4 microns
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Typical Thermal Properties
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7.7
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0.95
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4.5
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Melting Temperature, (ºC)
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410
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290
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380
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Linear coefficient of expansion, (10-5 /
ºC)
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6.9
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3.5
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Thermal conductivity, 10-4 (cal/sec)/(cm2
ºC/cm)
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3
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2
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Parylene is a vacuum deposited
plastic film used to coat many types of substrates. These
coatings provide excellent corrosion resistance, barrier
properties and exhibit superior dielectric protection. Some
items already benefiting from Parylene conformal coating
include: |
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Accelerometers
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Bobbins
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Capacitors
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Catheters
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Circuit boards
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Coils
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Ferrite Cores
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Disk Drive Components
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Fiber Optic Components
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Heat Exchangers
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Hybrids
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Keypads
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Flow Meter Components
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Magnets
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Pacemakers
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Wire
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Probes
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Photoelectric Cells
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P.I.N.D. rejects
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Relays
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Semiconductors
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Sensors
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Transformers
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Thermistors
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Elastomerics
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