Parylene Properties Reference

Typical Physical, Mechanical, Electrical and Barrier Properties of Parylene films

 

Parylene Properties Reference

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.

 

Properties

·      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 -200°C to +200°C

·      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

·      Electrical breakdown - Extremely high dielectric strength

 

TYPICAL PROPERTIES:

Typical Physical & Mechanical Properties

Parylene N

Parylene C

Parylene D

Tensile strength, psi

65,000

10,000

11,000

Tensile strength, MPa

45

69

76

Yield strength, psi

6,300

8,000

9,000

Yield strength, MPa

2,400

3,200

2,800

Elongation at break, %

40

200

10

Density, g/cm3

1.110

1.289

1.418

Coefficient of friction:

0.25

0.29

0.33

dynamic

0.25

.029

0.31

Water absorption, % (24 hr)

0.01 (0.019")

0.06 (0.029")

Index of refraction, nD23

1.661

1.639

1.669

Typical Electrical Properties

Parylene N

Parylene C

Parylene D

Dielectric strength, short time (Volts/mil at 1 mil)

7,000

6,800

5,500

Volume resistivity, 23°C, 50% RH (Ohm-cm)

1x1017

6x1016

2x1016

Surface resistivity, 23°C, 50% RH (Ohm-cm)

1015

1015

5x1016

Dielectric constant: 60 Hz

2.65

3.15

2.84

Dielectric constant: 1,000 Hz

2.65

3.10

2.82

Dielectric Constant: 1,000,000 Hz

2.65

2.95

2.80

Dissipation factor: 60Hz

0.0002

0.020

0.004

Dissipation factor: 1,000 Hz

0.0002

0.019

0.003

Dissipation factor: 1,000,000 Hz

0.0006

0.013

0.002

Typical Barrier Properties

Parylene N

Parylene C

Parylene D

Gas Permeability

cm3-mil/100 in2-24hr-atm (23ºC)

Nitrogen

7.7

0.95

4.5

Oxygen

30

7.1

32

Carbon dioxide

214

7.7

13

Hydrogen sulfide

795

13

1.45

Sulphur dioxide

1,890

11

4.75

Chlorine

74

0.35

0.55

Moisture Vapor Transmission

g-mil/100 in2-24hr, 37ºC, 90% RH

1 mil = 1/1000 in = 25.4 microns

1.50

0.14

0.25

Typical Thermal Properties

7.7

0.95

4.5

Melting Temperature, (ºC)

410

290

380

Linear coefficient of expansion, (10-5 / ºC)

6.9

3.5

Thermal conductivity, 10-4 (cal/sec)/(cm2 ºC/cm)

3

2