Cathode Deposition Masks for Pixelated Cathode Substrates

Order Code: E345
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A shadow mask for deposition of cathodes (or anodes) to define the active area onto Ossila's pixelated cathode substrates (S171). Two designs available on a double-sided mask, both with and without a 200 μm spacer.

Update: As part of our product improvement program, we have decided to simplify the masks available. Each type of mask is now available as a two-sided mask. On one side, a spacer and substrate holder are welded to the mask, and on the other, just a substrate holder. This will make both options available for our customers to  to test out if they are uncertain which is best suited for their work. It also means you only need to purchase a single mask (rather than two) if you would like to use both systems.

Please note that the single-sided masks are only available while stocks last. However, if you are concerned that the double sided masks will be too thick for your evaporator, please do get in touch as we will be happy to help with this.



Shadow Mask for evaporation of small pixels Close up of cathode shadow mask for the pixelated cathode substrate system
Individual (Small) Cathodes - Full mask and zoomed in corner details of mask with lid.
Dimensions for small cathode shadow mask (pixelated cathode)
Shadow mask for evaporation of large cathodes Close up of shadow mask for evaporation of large cathodes
Single (Large) Cathode - Full mask and zoomed in corner details of mask with lid.
Dimensions for large cathode evaporation shadow mask for pixelated cathode system

Mask with direct contact: For sputtering and other non-directional deposition systems, as well as for thermal deposition systems with oblique angles or a very short throw, we recommend the use of the direct contact mask to get well-defined edges.

Mask with 200 μm spacer: For normal thermal evaporation systems we recommend the use of masks with the 200 μm spacer to help avoid scratches and allow better out-gassing.

Use: Substrates prepared with OPV/OLED inks are laid with the active face down into each of the twelve device holders, so that the shadow mask openings look onto the surface on which the cathode is to be deposited. The mask can then be transferred to an evaporator ready for deposition.

Edge pixels: Please note that the two pixels closest to the edge of the substrates are liable to edge effects when using spin coated organic layers (but not with thermally evaporated materials). The edge pixels will also be more quickly susceptible to oxygen/water ingress, which can be of benefit for separating out intrinsic/extrinsic lifetime effects, but can also lead to poorer performance for these two pixels when used with less stable materials or cathodes (such as calcium).

Size 75 mm x 75 mm
Thickness 1.9 mm
Substrate capacity 12 substrates (S171)
Material Stainless steel


To the best of our knowledge, the technical information provided here is accurate. However, Ossila assume no liability for the accuracy of this information. The values provided here are typical at the time of manufacture and may vary over time and from batch to batch.