Flexible PCB Services

A flexible PCB, also known as a flexible circuit board or flexible circuit, consists of a polyimide (PI) substrate, an adhesive layer, a copper layer, a cover layer, and sometimes reinforcing ribs. Flexible printed circuits consist of metal trace layers (usually copper) and dielectric layers (usually polyimide). The thickness of the metal layers can range from very thin (<0.0001 inches) to very thick (>0.010 inches), while the thickness of the dielectric layers ranges from 0.0005 inches to 0.010 inches. Adhesives are typically used to bond the metal layers to the substrate, but other types of bonding methods, such as vapor deposition, can also be used.

To provide an accurate and fast quote, please include:

• Gerber files (RS-274X format preferred)
• Bill of Materials (BOM) if assembly is needed
• Stack-up or layer information
• Quantities and delivery timeline
• Special requirements (e.g., stiffeners, impedance control, finish type)

The recommended minimum bend radius depends on whether the flex area is static or dynamic:

• Static Flexing: Minimum radius = 6× the board thickness
• Dynamic Flexing: Minimum radius = 12× or more of the board thickness
• Using rolled annealed (RA) copper improves bendability and extends flex life.

Flex PCBs are primarily made from polyimide (PI) or polyester (PET) substrates with copper foil layers. We also use adhesiveless laminates for high-reliability applications. Coverlays, stiffeners (FR4 or stainless steel), and surface finishes (ENIG, OSP) are added depending on the design.

Yes. All our Flex PCBs are RoHS-compliant and manufactured to IPC-6013 and IPC-A-600/610 Class 2 or Class 3 standards, depending on application needs. Certifications and test reports are available upon request.

The company has world-class production equipment (laser drilling machine, VCP through-hole filling line, blind hole AOI testing equipment, ceramic grinding line, vertical vacuum resin blocking machine, etc.), first-class technical team, mature product line, perfect service flow, to provide one-stop PCB services from design, sampling to mass production and assembly.

• Copper foil : RA copper 17.5, 35, 70 microns
• Copper foil : ED copper 17.5, 35, 70 microns
• Base film : Polyimide 17.5, 25, 50 microns
• Base film : Polyester 25, 50, 75 microns
• Coverlay : Polyimide 25, 50, 75 microns
• Coverlay : Polyester 17.5, 35, 70 microns
• Coverlay : Solder mask 25, 50 microns
• Adhesive : Epoxy 20 – 35 microns
• Adhesive : Acrylic 20 – 35 microns
• Stiffener : Polymide 25 – 175 microns
• Stiffener : Polyester 25 – 300 microns
• Stiffener : Glass-epoxy 0.1 – 1.6 mm

Geyuan Electronics manufactures a wide variety of flexible circuits, flexible cables, flat flexible heaters, membrane switches, and rigid-flex circuits. Our products range from bare flexible circuits to complete product modules, ensuring a diverse range of application needs are met. Our superior manufacturing processes combine precision, innovation, and efficiency to deliver high-level flexible PCB solutions.

Geyuan Electronics customizes flexible PCB solutions to meet your specific project needs, working closely with you to deeply understand the challenges and objectives of your project. Whether you need a simple flexible PCB or a complex layout, our professional design capabilities and extensive material selection can provide you with flexible PCB products that meet your requirements. Tailor-made designs will ensure seamless integration and superior performance of your products.

In addition to manufacturing, Geyuan Electronics also offers complete EMS solutions—electronic manufacturing services. This means we can start from the initial design concept, take on the project, procure all the components you need, handle assembly and testing, and even package the finished circuit boards so they are ready for shipment. For many customers, this "one-stop" service is faster, cheaper, and eliminates the hassle of dealing with multiple suppliers.

A flexible PCB is a flexible printed circuit board made of polyimide film instead of rigid FR-4 material, allowing it to be bent, folded, or adapted to three-dimensional mechanical structures. Flexible PCBs are ideal when adapting to curved surfaces or moving spaces, removing inter-board connectors, reducing weight, or withstanding repeated bending. If the board remains stationary and space is unrestricted, rigid PCBs or flat flexible cables (FFCs) are generally more economical. We clarify this during the Design for Manufacturability (DFM) phase, rather than forcing flexible PCBs into the design.

Geyuan Electronics' standard flexible PCB structure uses 1-6 layers, with a maximum of 10 layers, suitable for special multilayer flexible circuit boards. The thickness of the flexible portion is typically 0.05-0.5 mm (up to 0.8 mm), with single-ended impedance controlled at ±5 Ω (up to ±3 Ω for advanced applications). The selection of the number of layers, stack-up structure, and stiffener placement depends on your bend radius, impedance targets, and reliability requirements, rather than choosing from a generic table, as stack-up structures that neglect copper balance in the bend area may crack after assembly.

Please provide Gerber files and drill files, stack-up structure, target finished flexible thickness, bend radius (including static and dynamic flexibility and expected bend cycles), cover layer and stiffener requirements, surface finish, target impedance, quantity and annual forecast, sample date, and required reports. A complete data package helps the engineering department provide quotes, DFM specifications, sample delivery times, and reliability risk assessments without unnecessary assumptions.