B: Conductors – Copper is the most widely used conductor and comes in various thicknesses to meet each customer’s requirements

  • Rolled annealed (RA) copper
  • Electro deposited (ED) copper


C:Adhesives – Adhesive selection depends on customer needs and conductor thickness

  • Epoxy
  • Acrylic
  • Pre-preg
  • Pressure Sensitive Adhesive(PSA)
  • Adhesiveless base material


D.Stiffener-Make the flex area more hardness for components.

  • FR4 stiffener
  • PI stiffener
  • Steel stiffener

E.Shielding – Shielding is applied when an application requires limits inelectromagnetic and/or electrostatic interference. Protective shielding can be patterned or solid. Either way, it reduces noise and controls impedance of signal lines.


A: Insulators – Flexible substrate (base) and cover lay materials are available in a variety of thicknesses

  • FR-4
  • Polyimide
  • Polyester, Polyethylene Naphthalate (PEN), and Polyethylene Terephthalate
    (PET)
  • Solder mask
  • Flexible solder mask
  • Photo image-able cover lay (PIC)