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Flexible circuit boards

Thanks to the advantages (e.g. cost, space and weight savings) that flexible and Rigid-Flex PCBs offer, they are being used more and more frequently. The areas of application for flexible printed circuit boards (also known as FPC, Flexible Printed Circuit) are constantly expanding. They are used in important electronics sectors such as the automotive industry, consumer electronics, medical technology, telecommunications, wearables clothing and aerospace.

At Multi-CB, you can obtain flexible printed circuit boards both as prototypes and as series in the highest quality with 1-10 layers (also plated-through). Assembly options with or without adhesive (adhesiveless), polyimide or FR4 stiffeners, also with airgap design.

The standard surface used is chemical gold (ENIG), the contours are formed according to requirements, preferably using laser cutting, or also with mechanical milling.

You should discuss the selected materials and design for the construction and layout of flexible circuit boards with us in the planning phase; we can assist you to work out the optimum solution!

Please contact our CAM-Station-Team (tel. +49-8104-6280) for additional technical questions about flexible circuit boards. Please mind also our Design-Aid for flexible circuit boards.


PCB-Calculator: Flexible PCBs

Technical options for flexible circuit boards

OptionsInclusiveNotes
Design1 to 10 layers, plated-through-Layer buildup
Conductor width min.100µm100µm
Annular ring min.100µm100µm
Via min. Ø0.15mm0.2mm
SurfacesChemical gold (recommended),
ENEPIG, chem silver
Chemical goldSurfaces
MaterialsPolyimide, high Tg polyimidePolyimideMaterials
Material thicknessstarting at 25µm foil plus copper25µm, 50µm
Copper thicknessfrom 18µm18µm, 35µm
Stiffener0.025µm - 3.20mm0.2mm, 0.3mm
Max. size250mm x 450mm-larger on request
CoverCoverlay or flexible solder-stop-
Cover bridge min.Coverlay: ≥ 350µm
Flex. solder-stop: ≥ 100µm
-Design-Aid
Impedance controlYes (10% tolerance)-
Adhesive tape3M 9077-Materials

Please also refer to our Design-Aid for flex and rigid-flex PCBs.

FLEXIBLE PCBs, 1 - 10 Layers

Inclusive 

  • 0.1mm tracks
  • 0.2mm drills, unlimited
  • 0.4mm via pad
  • Surface chem. gold
  • Polyimid 25µm / 50µm
  • Stiffener 0.2mm / 0.3mm
  • E-Test, Design-Rule-Check

Optional: Impedance, Expr. 5WD, ..

e.g. 40mm x 100mm 1 Layer Flex WD
3 pcs. each

66.79 €

12WD

3 pcs. each

88.41 €

8WD

50 pcs. each

6.47 €

12WD

50 pcs. each

9.60 €

9WD

Click for: Price & Production time, Quote & Order

Materials for flexible circuit boards

Material for flexible PCBsRecommended max.
operating temperature
Copper typeTgεr, Dk-
Permittivity
CTE-z (T<Tg)Electric
Strenght
Surface
Resistivity
Peel strength
 °C*°C@1MHzppm/°CKV/mmN/mm
Polyimide + Adhesive
Shengyi SF305105°RA-3,6-211 x 10^51,1
Polyimide Adhesiveless
DuPont Pyralux AP180°RA2203,4252561 x 10^101,8
Panasonic RF775130°ED3433,2-2761 x 10^81,7
Thinflex W-05050105°ED3503,3242161 x 10^50,6
PI Coverlay
Shengyi SF305C105°-----3 x 10^6-
DuPont Pyralux FR180°--3,5-1381 x 10^7-
Adhesive tape
3M 9077150°-------

* RA = Rolled copper, suitable for dynamic, flexible applications; ED = Electrolytically deposited copper , only suited for stable and semi-dynamic applications (see Design-Aid Flex boards)

Example - Stiffener

You can order your flexible circuit boards with a stiffener. The available thicknesses are: 0.075mm - 3.20mm.

Popular are the thicknesses 0.30mm and 0.20mm, e.g. for ZIF connectors.

Polyimid-Stiffener: 0.025mm - 0.225mm

FR4-Stiffener: 0.075mm - 3.20mm

In the Flex PCB calculator the final thickness (incl. stiffener) is given.