Construction & Tail

AMT provides total solutions for Projected Capacitive Input (PCI or PCAP) through various touch panel structures with a number of in circuit connections and touch surface treatments. Please refer to the following for details.

PCPA Touch Screen Construction

AMT provides 2 PCAP structural designs: Glass-Film-Film-Film (GFFF) and the Glass-Film-Film (GFF). The GFFF structure is utilized in PCAP touch panel sizes from 7” to 15.6”. The GFF structure is utilized in panels from 8.4” to 32” and in the PCAP COF design from 3.5” to 10.4”.

The PCAP GFFF structure


The PCAP GFF structure


The PCAP COF GFF structure


The GFFF and GFF structures feature different design concepts. The GFFF structure has an EMI shielding layer on the bottom of the touch panel for reducing noise emanating from the LCD. The design of GFF structure paired with a COF tail is excellent for mobile devices with limited system space.

Both structures utilize glass as the surface layer with different glass types available to fulfill customer requirements. Cover glass thicknesses of 1.1/1.8/2.8mm are supported.

PCAP Tail Designs

Just as there are different structures and sizes for PCAP touch panels, PCAP touch panel tail designs are different as well. Below are the characteristics of PCAP tails:

  • The number of ITO traces embedded in touch panels is dependent on panel size with larger panels having more traces.
  • The location of the tail is usually on the long side of the touch panel, the shorter the tail the better the touch functionality.
  • A PCAP touch panel can have two or more tails , including a COF tail.
  • We use a ZIP connector for the PCAP COF tail to reduce the size and height of the system connector.
 1-tail 2-tailPCI-COF
 One tail Two tail COF tail

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