[Under development] Low-κ thermosetting tape for FPCs

Bonding sheet for high-speed transmission FPCs that can be used for both liquid crystal polymer (LCP) and modified polyimide (M-PI)

  • Product name
    D5300P series
  • Features
    • Low transmission loss due to low dielectric constant
    • The product can be used for both LCP and M-PI that are used for base material for high-speed transmission FPCs.
    • Existing FPC manufacturing equipment can be used because the tape thermally cures at 180℃.
    • This Novel formulation optimizes low dielectric constant with a high bonding strength. This technology enables the manufacture of highly reliable FPCs.




Product name D5310P series D5320P series Note
Type High-bonding strength type High-heat resistant type  
Cover film thickness (μm) 38 Transparent
Adhesive thickness (μm) 25 Customize 12-50 (μm)
Release PET thickness (μm) 38 White
Bonding strength (N/10mm) 13 10 90° peeling strength to copper foil
Heat resistance 260℃ Pass 288℃ Pass  
Standard size (width & length) 250mm×100m
Dielectric properties Dielectric constant (κ) 2.34 2.36 ASTMD2520 (JISC2565),10GHz
Dielectric dissipation factor (DF) 0.0028 0.0028 ASTMD2520 (JISC2565),10GHz

It is suitable for both interlayer bonding of LCP-based FPC for high-speed transmission of 6 GHz or higher used for 5G communication and M-PI-based FPC for high-speed transmission of 6 GHz or lower.

1.Dielectric properties

D5310P series D5320P series Liquid crystal polymer (LCP)
Initial values Dielectric constant(κ) 2.34 2.36 3.0 - 3.4
Dielectric dissipation factor(DF) 0.0028 0.0028 0.002 - 0.0023
After aging at 40℃ /90%/96-hour Dielectric constant(κ) 2.35 2.36 3.0 - 3.4
Dielectric dissipation factor(DF) 0.0028 0.0028 0.002 - 0.0023

2.Transmission loss

Testing conditions

  • Microstrip line length
  • Impedance
  • Signal line thickness
  • Dielectric thickness
Simulation data
  • * Simulation by Dexerials, using properties of a typical liquid crystal polymer (LCP)


Note on the characteristic data given - Data on the characteristics of the products described in this page based on the results of evaluations carried out by the company. This does not guarantee that the characteristics of the product conform with your usage environment. Before use, review the usage conditions based on evaluation data obtained from the equipment and substrates actually used.