Membrane Switches

Creative Materials develops a variety of silver, carbon, and dielectric inks that are used in the manufacture of the various layers that comprise membrane switches. Silver and carbon inks, with different conductivities and curing conditions, can be matched with a substrate choice and resistivity requirements of the printed circuitry of the membrane switch. Creative Materials provides membrane switch inks that are suitable for printing on either flexible or rigid surfaces, with useful temperature ranges from -55°C to 200°C. We offer blendable carbon and silver inks to achieve cost reduction and to tailor our inks to conductivity requirements. We also formulate compatible dielectric ink used to overlay protective layers.

Membrane switches interface between the user and electronic devices, and are used in aerospace, consumer, industrial, defense and gaming industries. Touch screens and plastic keyboards are examples of devices that utilize membrane switches.

Our popular ink systems are comprised of a compatible silver ink, carbon ink and a dielectric ink, which can be blended to adjust conductivity and to create cross-linkage to ensure enhanced conductivity and protection of circuitry. We also offer a number of conductive adhesives that work with these systems.

Membrane Switches

Order Sample Technical
Question
Product
Recommendation

Silver Inks

Product
Resistivity (ohm/sq/mil)
Typical Cure
Comments
< 0.010
3-5 mins @ 110°C
Carbon version, 112-48 can be blended with 125-15 to reduce cost and conductivity.
< 0.015
5- 10 mins @ 120°C
Carbon version 108-46 can be blended with 101-59 for cost and conductivity adjustment
< 0.010
3-5 mins @ 110°C
Faster drying version of 101-59.
< 0.020
15 mins @ 70°C
Carbon version, 116-19, can be blended with 114-01 for cost reduction.
< 0.015
8-12 mins @ 120°C
Fine-line version of 101-59, capable of 4 mils line widths and spacing.

Carbon Inks

Product
Resistivity (ohm/sq/mil)
Typical Cure
Comments
< 20
3-5 mins @ 110°C
Blendable with 112-47 and 125-15.
< 25,000
5 mins @ 125°C
Blendable with 112-48 and 125-15.
< 50
5 - 10 mins @ 120°C
Blendable with 101-59.
< 50
15 mins @ 70°C
Blendable with 114-01.

Dielectric Inks

Product
Color
Description
Blue, Matte
100% solids flexible solvent-resistant low odor UV-curable dielectric ink and coating.
Green, Matte
100% solids flexible solvent-resistant low odor UV-curable dielectric ink and coating.
Green, Translucent
100% solids flexible solvent-resistant low odor UV-curable dielectric ink and coating.
Clear
100% solids flexible solvent-resistant low odor UV-curable dielectric ink and coating.

Conductive Adhesives

Product
Volume Resistivity (ohm-cm)
Comments
< 0.0001
Flexible silicone-based adhesive.
<0.0004
1:1 mix ratio by weight flexible epoxy adhesive cures as low as 80°C.
< 0.005
Room-temperature curing two-part adhesive with excellent bond strength.
< 0.0005
Flexible thermoplastic adhesive.

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