Technology

TFT- PD

Photodiode substrate: It is a rigid or flexible substrate that uses thin-film transistor manufacturing processes to produce regularly arranged sensing pixels and circuits on the surface. The main function is to sense, absorb visible light and convert it into electric charge to be stored in the transistor.

  • a-Si TFT Design & Manufacture
  • IGZO TFT Design & Manufacture
  • LTPS Design & Manufacture
  • a-Si Photodiode Design & Manufacture
  • Flexible & Glass Substrate Manufacture

a-Si sensor array : Two-dimension matrix structure. Each pixel includes one switching thin film transistor (TFT) and one light-sensitive photodiode .

IGZO thin film transistor  : IGZO-TFT shows faster read-out speed and lower noise compared to amorphous silicon TFT.

LTPS  thin film transistor : LTPS-TFT shows highest mobility compared to amorphous silicon TFT and IGZO TFT. 

Flexible Substrate : Has light-weight and non-breakable merits.

Scintillator

Scintillator :  Absorb X-ray radiation and convert to visible light.

  • CsI Direct Deposition Technology
  • CsI Film Lamination Technology
  • Gd2O2S Film Lamination Technology

Structured scintillators consist of phosphor material in a needle like structure. This increases the number of X-ray photon interactions and reduces the lateral scattering of light photons. 

Unstructured scintillators scatter a large amount of light and this reduces spatial resolution. But Gd2O2S:Tb shows low lag image  compared to CsI:TLI.

參染鉈的碘化銫閃爍體因其類光纖(fiber optic-like)的針狀結構，所以具備了較佳的光轉換效率(high-absorption coefficient)以及較佳的空間分辨率(spatial resolution)。

硫氧化釓閃爍體於空間分辨率上，雖然無法與碘化銫閃爍體匹敵，但其具備了成本競爭力以及較低的影像延遞(Image Lag)的優勢。