Prefabricated OFET Test Chips (Low Density)

Order Code: S181


(excluding Taxes)


The prefabricated low-density substrates are compatible with Ossila's FET test board (E222) and FACT1 System to make mobility screening quick and simple.

Thermally-evaporated gold electrodes on silicon/silicon oxide substrates with optional OTS and/or PFBT treatment makes device fabrication as simple as spinning on your semiconductor.

The devices are made to order, so current lead time is 1-2 weeks for standard devices. Please contact us to discuss your exact needs and a customised quotation.

If you are uncertain about which range of specifications best suits your needs then read our specification and user guide for the prefabricated substrates to gain a full overview of the systems available.


Quantity Price
S181 Linear 1 mm 30 µm No 10 £499
S182 Linear 1 mm 30 µm Yes 10 £649
S183 Linear 1 mm 30 µm variable No 10 £499
S184 Linear 1 mm 30 µm variable Yes 10 £649
*OTS = octadecyltrichlorosilane / PFBT = pentafluorobenzenethiol


manual icon LD OFET specification and usage guide




Low density bottom gate bottom contact prefabricated FET substrate
Pre-fabricated low-density FET substrate.


Standard devices are supplied in batches of ten and use our low density OFET system (schematics below). Custom substrates also available.

Getting an OTS treatment right is one of the hardest parts of substrate preparation. This is due to the requirement for a small amount of moisture to be present in order for self-assembly to occur, but not so much that polymerisation occurs. Having optimised this process in our own laboratories we are now able to offer substrates pre-treated with OTS.


Constant channel length design

Low density FET substrate mask dimensions (constant channel length)
Constant channel width low-density FET design.


Variable channel length design

Low density OFET substrate mask dimensions (variable channel length)
Variable channel width low-density FET design.

Produce 5 OFETs in 60 seconds with Ossila prefabricated substrates


To see the expanded version of this video with further details on device structure and measurement, click here.


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.