EN
Flexible PCB
KING FIELD has over 20 years of industry experience in PCB prototyping and manufacturing . We pride ourselves on being your best business partner and close friend, meeting all your PCB needs.
☑ 20 years + Flex PCB practical experience
☑ Surface treatments include hot air leveling, nickel-gold plating, immersion silver plating, and immersion tin plating.
☑ MES system enables full traceability
Description
What is a flexible PCB?
Flexible printed circuit boards mainly operate on very thin and flexible materials. The material that forms the basis of flexible PCB gives them their flexibility and ability to keep stable electrical connections even when the circuit gets bent, folded or twisted. Polyimide is the common type of substrate used for flex PCBs.
KING FIELD's flexible PCB manufacturing capabilities
Project |
Ability |
number of floors |
Floors 1-40 |
Plate thickness (without reinforcing plate) |
4-40 Millimeter |
Plate thickness tolerance (including PI reinforcing plate) |
±10% |
Minimum board size |
Without connecting bridge: 0.0788 inches × 0.1576 inches; With connecting bridge: 0.3152 inches × 0.3152 inches |
Maximum board size |
8.668 inches × 27.5 inches |
Impedance control tolerance |
≤50Ω: ±4Ω; >50Ω: ±7% |
Minimum Covering Membrane Connecting Bridge |
8. Millet |
Minimum mechanical drilling diameter |
4. Millet |
Inner layer line width/line spacing |
2/2 Millimeter |
Outer layer line width/line spacing |
2/2 Millimeter |
Solder mask color |
Green, black |
Surface treatment |
Includes hot air leveling (HASL), electroless nickel-gold plating (ENIG), electroless nickel-palladium-gold plating (ENEPIG), electrolytic nickel-gold, soft gold, hard gold, immersion silver, organic solder mask (OSP), and immersion tin. |
Why choose KING FIELD as your flexible PCB manufacturer?
Being a global manufacturer of flexible printed circuit boards, KING FIELD offers full-service and customer-supplied material flexible PCB manufacturing services worldwide.
- 20+ years of craftsmanship accumulation
- Following:
- The average experience of our core team members in Flex is 20+ years. Besides, they have very rich and practical PCB experience covering design, process development, production management, and other fields.
- Currently, it has a research and development team of 50+ people and a front-line production team of 600+ people , with a modern factory area of 15,000+ square meters.
- Quality Assurance
For quality control, KING FIELD has achieved the six major system certifications: IATF 16949, ISO 13485, ISO 9001, ISO 14001, ISO 45001, and QC 080000. We also utilize 7 SPI, 7 AOI, and 1 X-Ray testing equipment to maintain quality throughout the process. Our digital MES system can carry out full traceability.
l Transportation support
Domestic shipping is handled by SF Express/Debon Logistics, which provides full coverage; international shipping is also available via DHL/UPS/FedEx, and professional shockproof packaging.
l After-sales guarantee
- Regarding service, KING FIELD has set up 24-hour technical support and constantly keeps close communication with customers from pre-sales consultation to after-sales response.
- We even provide a rare "1-year warranty + lifetime technical consultation" service. If the product has a non-human-caused quality problem, we can return or exchange it free of charge and bear the relevant logistics costs.
FAQ
Q1. What is your delivery time?
KING FIELD:
Our sample delivery time for a standard order is 3-5 days. If you ask for a rush, we can get you samples in 24-48 hours. Bulk orders are typically delivered within 7-12 days of receiving a deposit, depending on the quantity of your order.
Q2. How to avoid rough hole walls and material damage when drilling holes in flexible boards?
KING FIELD:
The drills we use for high-speed drilling are diamond coated. We do plasma cleaning with O₂/CF₄ after drilling to get rid of contaminants. This way, the uniformity in copper for the holes in our PCB is 85% or higher.
Q3. How do you ensure the etching precision of the fine lines on the flexible board ?
KING FIELD:
Thin copper etching line, dual-sided fan spraying, LDI direct imaging, online AOI 100% inspection are the series of steps we take to keep line width measurement accuracy within ±2μm .
Q4. What is the minimum trace width/spacing for your flexible PCBs ?
KING FIELD:
We are capable of line width and spacing of 0.05mm/0.05mm.
Q5. How do you ensure a strong bond between the cover film and the substrate?
KING FIELD: We are going to apply plasma activation to effectively improve the PI surface . When using acrylic adhesive , the thickness is kept at 25±3μm , thereby providing a peel strength ≥1.0N/mm and successfully passing the bending test.
