Flexible circuit boards

Name: Flexible circuit boards
Brand: Multi-CB
Rating: 4.7499415387014 (12829 reviews)

Because of the advantages (for example, cost, space, and weight savings) that flexible and Rigid-Flex-circuit boards have for some projects, they are used ever more frequently. Multi-CB can produce your flexible circuit boards with the highest quality, either as prototype or as series with 1-10 layers.

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

Option	Inklusive	Hinweise
Ausführung	Option	1-10 Lagen durchkontaktiert	Inklusive	-	Hinweise	Lagenaufbau
Leiterbahn min.	Option	100µm	Inklusive	100µm	Hinweise
Restring min.	Option	100µm	Inklusive	100µm	Hinweise
Via min. Ø	Option	0.15mm	Inklusive	0.2mm	Hinweise
Oberflächen	Option	chemisch Gold (empfohlen), ENEPIG, chem. Silber	Inklusive	chemisch Gold	Hinweise	Oberflächen
Materialien	Option	Polyimid, Polyimid Hoch-TG	Inklusive	Polyimid	Hinweise	Materialien
Materialdicke	Option	ab 25µm Folie zzgl. Kupfer	Inklusive	25µm, 50µm	Hinweise
Kupferdicke	Option	ab 18µm	Inklusive	18µm, 35µm	Hinweise
Stiffener	Option	0.025mm - 3.2mm	Inklusive	0.2mm, 0.3mm	Hinweise
Max. Größe	Option	250mm x 450mm	Inklusive	-	Hinweise	größer a.A.
Abdeckung	Option	PI Coverlay (z.B. mehrere Biegezyklen) oder flexibler Lötstopp (z.B. stabile Biegung)	Inklusive	PI coverlay 25µm	Hinweise
Stegbreite min.	Option	Coverlay: ≥ 350µm flexibler Lötstopp: ≥ 100µm	Inklusive	-	Hinweise	Design-Hilfe
Impedanzkontrolle	Option	ja (10% Toleranz)	Inklusive	-	Hinweise
Klebetape	Option	3M 9077	Inklusive	-	Hinweise	Materialien

Options	Inclusive	Notes
Design	Options	1 to 10 layers, plated-through	Inclusive	-	Notes	Layer buildup
Conductor width min.	Options	100µm	Inclusive	100µm	Notes
Annular ring min.	Options	100µm	Inclusive	100µm	Notes
Via min. Ø	Options	0.15mm	Inclusive	0.2mm	Notes
Surfaces	Options	Chemical gold (recommended), ENEPIG, chem silver	Inclusive	Chemical gold	Notes	Surfaces
Materials	Options	Polyimide, high Tg polyimide	Inclusive	Polyimide	Notes	Materials
Material thickness	Options	starting at 25µm foil plus copper	Inclusive	25µm, 50µm	Notes
Copper thickness	Options	from 18µm	Inclusive	18µm, 35µm	Notes
Stiffener	Options	0.025µm - 3.20mm	Inclusive	0.2mm, 0.3mm	Notes
Max. size	Options	250mm x 450mm	Inclusive	-	Notes	larger on request
Cover	Options	Coverlay or flexible solder-stop	Inclusive	-	Notes
Cover bridge min.	Options	Coverlay: ≥ 350µm Flex. solder-stop: ≥ 100µm	Inclusive	-	Notes	Design-Aid
Impedance control	Options	Yes (10% tolerance)	Inclusive	-	Notes
Adhesive tape	Options	3M 9077	Inclusive	-	Notes	Materials

Material for flexible circuit boards

Material for flexible PCBs	Max. recommended operating temperature	Copper type	Glass transition temperature Tg	εr	CTE-z	Electric strenght	Surface resistivity	Peel strength
Material for flexible PCBs		Max. recommended operating temperature	°C	Copper type	*	Glass transition temperature Tg	°C	εr	@1MHz	CTE-z	ppm/°C	Electric strenght	KV/mm	Surface resistivity	MΩ	Peel strength	N/mm
Material for flexible PCBs	Polyimide + Adhesive	Max. recommended operating temperature		Copper type		Glass transition temperature Tg		εr		CTE-z		Electric strenght		Surface resistivity		Peel strength
Material for flexible PCBs	Shengyi SF305	Max. recommended operating temperature	105°	Copper type	RA	Glass transition temperature Tg	-	εr	3,6	CTE-z	-	Electric strenght	21	Surface resistivity	1 x 10^5	Peel strength	1,1
Material for flexible PCBs	Polyimide Adhesiveless	Max. recommended operating temperature		Copper type		Glass transition temperature Tg		εr		CTE-z		Electric strenght		Surface resistivity		Peel strength
Material for flexible PCBs	DuPont Pyralux AP	Max. recommended operating temperature	180°	Copper type	RA	Glass transition temperature Tg	220	εr	3,4	CTE-z	25	Electric strenght	256	Surface resistivity	1 x 10^10	Peel strength	1,8
Material for flexible PCBs	Panasonic RF775	Max. recommended operating temperature	130°	Copper type	ED	Glass transition temperature Tg	343	εr	3,2	CTE-z	-	Electric strenght	276	Surface resistivity	1 x 10^8	Peel strength	1,7
Material for flexible PCBs	Thinflex W-05050	Max. recommended operating temperature	105°	Copper type	ED	Glass transition temperature Tg	350	εr	3,3	CTE-z	24	Electric strenght	216	Surface resistivity	1 x 10^5	Peel strength	0,6
Material for flexible PCBs	PI Coverlay	Max. recommended operating temperature		Copper type		Glass transition temperature Tg		εr		CTE-z		Electric strenght		Surface resistivity		Peel strength
Material for flexible PCBs	Shengyi SF305C	Max. recommended operating temperature	105°	Copper type	-	Glass transition temperature Tg	-	εr	-	CTE-z	-	Electric strenght	-	Surface resistivity	3 x 10^6	Peel strength	-
Material for flexible PCBs	DuPont Pyralux FR	Max. recommended operating temperature	180°	Copper type	-	Glass transition temperature Tg	-	εr	3,5	CTE-z	-	Electric strenght	138	Surface resistivity	1 x 10^7	Peel strength	-
Material for flexible PCBs	Adhesive tape	Max. recommended operating temperature		Copper type		Glass transition temperature Tg		εr		CTE-z		Electric strenght		Surface resistivity		Peel strength
Material for flexible PCBs	3M 9077	Max. recommended operating temperature	150°	Copper type	-	Glass transition temperature Tg	-	εr	-	CTE-z	-	Electric strenght	-	Surface resistivity	-	Peel strength	-

* 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)

UL certification for flexible circuit boards

At Multi-CB, you also get one-sided and multilayer flexible printed circuit boards with UL certification.

Flexible Circuit Board Microsection — 2 Layer Flex-PCB (PTH) Microsection

Example - Stiffener

Flexible circuit board with ZIF connector 250µm — ZIF connector, picture by courtesy of Molex

You can order your flexible circuit boards with a stiffener. The available thicknesses are: 0,075mm - 3,20mm.

Popular are the thicknesses0,30mmand0,20mm, e.g. forZIF 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.

Additional information

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Phone:	+44 (0)1425 489 111 / +49 (0) 8104 628 0
Email:	info@multi-circuit-boards.eu