Double sided flexible circuit (FPC) consists of double-sided copper clad material with top and bottom cover films (PI or Green/Yellow Oil, Carbon Ink, etc). Two conductive layers with an insulating layer between, plus conver layers on outer layer. The cover films are pre-routed to access copper from both sides using plated thru holes(PTH).

Application:
*Optical Pick-up for A/V & Computer ( or CD-RW & DVD-RW)
*Digital( or CCD ) Camera
*LCD Module for Mobile Phone
*Vibration Motor for Mobile Phone

FPC Process Capability
*processing layers: 1-6 layers
*Finished thickness (thinnest): 3mil (0.08mm)
*Minimum aperture: 4mil (0.10mm)
*Minimum line width / spacing: 2 mil (0.05mm)
*Maximum board size: 10 "x 45" (250x 1200mm)
*Surface Treatment: OSP, HASL, Electric Nickel / Gold, , Chemical nickel / gold, lead-free HASL, Immersion Gold
*Insulation resistance: ± 1011Ω (Normal Normal
*Thermal shock resistance: 260 ° C 10 sec.
*Processing materials: Polyimide (PI), polyester (PET), polyimide (PI) + FR4