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Low Loss Flex PCB for Automotive Electronics

Flex PCB Production | FPCway

Flex PCB Production | FPCway

We are specialized in the quick FPC prototype for 1-16L flex PCB boards and also could do flexible circuit PCB board production in affordable price, high quality and quick lead time. Working in Flexible PCB board industry for 10+ years, we now have a 5,000sqm Flex PCB factory, the monthly flex PCB production capacity are more than 15,000sqm. And we have a team of more than 200 staffs, and more than 20 senior executives have more than ten years of experience in Flex PCB industry. With these experiences and continue to update the equipment, we maintained the advanced technical capability and high FPC prototype and FPC production capacity in the Flex PCB industry.

FPCway is a flex circuit board manufacturer that provides fast flex PCB prototypes, short-runs, and production. We offer flex PCB material and components to build high-quality flexible printed circuit boards.

And our FlexIible PCB circuit boards now are highly used in computer, communication network equipment, mobile phone, digital camera, instrumentation, aerospace instrument, biomedical, home appliance and lighting, drone, smart wear, smart home, bluetooth, car, industrial control, robot, tablet, LCD, projection Instrument, car navigation, security and other high-tech fields, etc.

Lead Time for Flex PCB

LayerStandard FPC SpecificationQuickest ProtypeStandard PrototypeProduction Time
1L1Layer, PI, 0.05mm-0.2mm thickness, 6um-100um base copper, Yellow Coverlay, White silkscreen, ENIG1-2 Days5-7 Days8-10 Days
2L2Layer, PI, 0.08mm-0.3mm thickness, 6um-100um base copper, Yellow Coverlay, White silkscreen, ENIG1-2 Days5-7 Days8-10 Days
4L4Layer, PI, 0.2mm-0.4mm thickness, 6um-100um base copper, Yellow Coverlay, White silkscreen, ENIG3-4 Days8-10 Days10-12 Days
6L-16LUp to the customers requirements.6-8 Days12-14 Days14-18 Days

FPC has single sided flexible PCB board, double sided flex circuit PCB, multi-layer Flex PCB and Rigid-flex PCB circuit board. The flex PCB material is polymide FCCL and it has high heat resistance and stable size. Following are the common layer structure and stack up for Flex circuit PCB for your reference. The FPC final thickness could be adjusted flexibly with different thicknesses of PI, adhesive, copper, etc.

FCCL Material Thickness

Coverlay/Solder Mask2Layer FCCL
PI (12.5/25/50/100um, etc.)Copper (6/9/12/18/35/70/100um, etc.)
AD (15/25/35/50um, etc.)AD (0/12.5/20/25um, etc.)
PI (12.5/25/50/100um, etc.)
1Layer FCCL
AD (0/12.5/20/25um, etc.)Copper (6/9/12/18/35/70/100um, etc.)
Copper (6/9/12/18/35/70/100um, etc.)AD (0/12.5/20/25um, etc.)
PI (12.5/25/50/100um, etc.)

Flex PCB Stack-up Structure

Flex PCB Technical Capabilities

FPC Layer
NO.ITEMStandard CapabilitiesSpecial Capabilities
1FPC Layer1-12L1-16L
FPC Material
2Base MaterialPI (12.5um, 25um, 50um)100um
3Copper TypeRA Copper: 12um, 18um, 35um, 70um ED Copper: 12um, 18um, 35um, 70um6um, 9um, 100um
4PI Coverlay12.5um, 25um, 50um100um
5AdhesivePSA Adhesive: 50um-100um (3M467, Tesa 8853, Tesa 8854, etc.)
6Hot-Press Adhesive13um, 25um
7StiffenersPI Stiffener: 12.5/25/50/75/100/125/150/200/250 (um) PET Stiffener: 0.125/0.188/0.25(mm) FR4 Stiffener: 0.1mm-1.6mm SUS Stiffener: 0.1mm-0.5mm Aluminum Stiffener: 0.1mm-0.5mm2mm
8EMI shielding filmHCF-6000G, PC800, etc.100um
Board Size & Thickness
9Biggest Board Size500mm*600mm
10Longest Board Size250mm*2520mm
11Biggest Board Thickness2.0mm
12Thinnest Board Thickness0.05mm
13Thickness Tolerance0.05mm~0.24mm: ±0.03mm 0.25mm~0.47mm: ±0.05mm
Drill
14Minimum Hole Size0.1 mm0.025mm
15Holes Size Tolerance±0.05 mm
16Holes Posistion Tolerance±0.05 mm
17Minimum vias Pad Size0.3mm0.2mm
18Minimum Annular Ring Size0.1mm0.075mm
19Blind/Buried ViasYes
Copper Tracks and Plating
20Minimum Track Width/Space (35um Copper)0.1mm/0.1mm
21Minimum Track Width/Space (18um Copper)0.07mm/0.07mm0.05mm/0.05mm
22Minimum Track Width/Space (12um Copper)0.04mm/0.04mm0.035mm/0.035mm
23Track Width Tolerance20%0.02mm
24Tracks/Pads Position Tolerance≥0.06 mm≥0.05 mm
25Tracks/Pads To Board Edge≥0.15 mm≥0.05 mm
26Golden Finger Pitch TolerancePitch:10~20mm : ± 0.03mm, Pitch:20~50mm : ± 0.05mm
27Copper Plating Thickness8-20um
28Hole Copper Thickness8-20um35um
29Minimum Copper Thickness for Hollow Out FPC35um
Surface Finish
30ENIGAU: 1-2u" Thickness NI: 40-120u" Thickness3u” Thickness
31Electrolytic Nickel Gold (Hard Gold Plating)AU: 1-50u” Thickness NI: 80-320u" Thickness
32Immersion SilverAg: 6-12u" Thickness
33OSP8-16u" Thickness
34Immersion TinSN: 10-60u" Thickness
35Tin PlatingSN: 5-30um Thickness
36ENEPIGAu:1-4u" Thickness NI: 120-200u" Thickness Pd:1-6u" Thickness
Coverlay
37Coverlay Opening Size Tolerance±0.1 mm±0.03 mm
38Minimum Drilling Size on Coverlay Opening0.45mm0.2mm
39Minimum Square Size on Coverlay Opening0.7mm*0.7mm0.2mm*0.2mm
40Coverlay Opening Position Tolerance±0.1 mm±0.03 mm
41Coverlay Align Tolerance±0.1 mm±0.02 mm
42Excessive Glue≤0.15 mm
43Minimum Area of Excessive Glue≤20% Pads Area
Solder Mask and Silkscreen
44Solder Mask Thickness15um +/-5um
45Solder Mask Tolerance For Opening Size+/-0.05mm+/-0.02mm
46Solder Mask Tolerance For Opening Position0.1mm+/-0.02mm
47Minimum Silkscreen line width0.13mm
48Minimum Silkscreen Gap0.2mm
49Minimum Silkscreen Position Tolerance+/-0.3mm
50Minimum Silkscreen height0.8mm
51Minimum Solder Mask Bridge0.13mm
Board Outline & Stiffeners
52Board Outline Tolerance with Steel Die±0.1 mm±0.03mm
53Board Outline Tolerance with Knife Die±0.2 mm
54Minimum Gap Between Drilling and Board Edge≥0.5 mm
55PSA Position Tolerance±0.2 mm
56Stiffeners Position Tolerance±0.2 mm
FPC E-Test
57Test Voltage10-50V
58Insulation Test Impedance≥10MΩ
59Conduction Test Impedance≤50Ω
60Impedance Tolerance10%
FPC Physical Property
61Solderability Test245±5℃, 3 Seconds For One Time, Soldering Area≥95%
62Thermal Shock Test288±5℃, 10 Seconds Per 3 Times, No Delamination and No Bubbles
63FCCL Peel Strength≥0.8kgf/㎠ (1cm width sample)
64Coverlay Peel Strength≥0.8kgf/㎠ (1cm width sample)
65Stiffeners Peel Strength0.15 N/mm (Hot-Press Adhesive) 0.49 N/mm (PSA Adhesive)