Organic Thin Film Transistors(OTFT)

Advantages of Organic Thin Film Transistors (OTFT)

Category a-Si on Glass LTPS on Plastic OTFT on Film
Process Temp. 300 °C 250 °C 100 °C
Process CVD, Dry Etcher, PVD
Sheet by Sheet process
CVD, Dry Etcher, PVD
Sheet by Sheet process
Wet(Liquid) coating and development
Roll to Roll process
No. of Mask 4~5 7~11 4~5
Mobility 0.1 ~ 1.0 cm2/Vsec 20 ~ 100 cm2/Vsec 0.5 ~ 4 cm2/Vsec
Off Current(A) >10-12 10-14~10-12 >10-14
Substrate Glass Soluble PI PET, PEN, PI, Poly-ketone, PC etc
  • a-Si TFT

  • LTPS

  • OTFT

Organic Thin Film Transistors (OTFT) Process

OTFT Stacking Structure
Detail Process Surface Treatment S/D Electrode OSC Gate Insulator Gate Electrode Inter layer Dielectric Cathode Electrode
Organic material Coating Spin
Slot Die / Inkjet
PR Coating Spin
Slot Die
Electrode Vacuum Deposition
Electroless Plating

Advantages of Organic Thin Film Transistor (OTFT) Process

// Conventional Photolithography Process (One Layer)

// CLAP’s Organic TFT Process (One Layer)

Eliminate 3 Step (PR Coating, Etching, Strip)
No need to use photoresist
Crosslinked material is not affected by subsequent processing

Organic Thin Film Transistor (OTFT) Flatform

Organic Thin Film Transistor (OTFT) Development Roadmap