Distribution for european markets now

micro resist technology GmbH is providing a new selection of UV-curable liquid silicone rubber / UV-PDMS (OEM:Shin-Etsu) for European markets. The UV-PDMS can be used in a wide range of applications, but in particular for the manufacture of soft-molds in replication technologies such as nanoimprint lithography.

Main advantages by using the new Shin-Etsu UV-PDMS over generic PDMS:

  • Spin-coating for enhanced mold fabrication
  • Faster curing time (e.g. 10 min after UV exposure)
  • High resolution capabilities down 100 nm and smaller
  • 0.02% shrinkage for superb pattern fidelity
     

There are two different types of UV-PDMS available. The following table provides the general material characteristics of the two different types of UV-PDMS:

General material characteristics of the new UV-PDMS (OEM:Shin-Etsu)

 

KER-4690

(X-34-4184)

KER-4691

(X-34-4208)

Appearance
(Color Tone)

Colorless

Milky-white

Appearance
(Transparency)

Transparent

Semi-
transparent

Viscosity
[Pa・s]

2.7

110

Hardness:
Durometer
type-A

55

42

Elongation
at Break [%]

110

400

Tensile Strength
[MPa]

7.7

7.0

Tear Propagation
Strength (crescent)
[kN/m]

3.0

17.1

Linear
Contraction [%]

<0.1

<0.1

Curing Rate*
[Min]

20

45

Curing Condition
[mJ/cm2]

2000

2000

* TA Instruments ARES-G2, 25℃, 1Hz

Each system consists of two components. After thoroughly mixing the two-component material system (A/B) in equal volume, the liquid mixture compounds can be processed for up to 24 hours by casting, spin-coating or other deposition methods. Due to the photo-sensitivity, the cross-linking (or curing) is initiated by UV-exposure. In contrast to generic PDMS, this allows almost full curing already at room temperature and significantly increases the curing speed (by factor of 100 and more). Furthermore, without the need of an additional thermal curing one can achieve a minimized shrinkage of 0.02%.

 

For detailed information on material properties and process specifications, please get in contact with the product manager NIL polymers Dr. Manuel Thesen (m.thesen@microresist.de). In case of inquiry request or purchase order, please contact our sales assistant Mrs. Anja Hinz (a.hinz@microresist.de).

 

The Shin-Etsu UV-PDMS are available in the following package sizes:

50 g / 50 g (UV-PDMS KER-4690-A/B)

500 g / 500 g (UV-PDMS KER-4690-A/B and KER-4691-A/B)