Common Membrane Materials

Product Pore Size  Thickness  Transparency  Pore Density  Porosity  Diffusive Permeability
NPN 60 nm 100 nm Glass-like 1 x 10¹º cm⁻² 20 % 0.1 cm/sec
Dual Scale 60 nm and 3 μm 100 nm Glass-like 1 x 10¹º cm⁻² 25% > 0.1 cm/sec
SiN 0.5 μm 400 nm Excellent 1 x 10⁸ cm⁻² 5%, 20% 0.03 cm/sec
G-Flat™ Oxide 

0.5 μm

8 μm

300 nm Excellent 1 x 10⁸ cm⁻² 5%, 20% 0.03 cm/sec

 

Key  

NPN – Nanoporous silicon nitride

Dual Scale – NPN with micropatterned 3 micron pores

SiN – Microporous silicon nitride

G-Flat Oxide – Microporous glass