Kingford focus on the high-quality PCBA order demand of "Multiple varieties, medium and small batch, and short lead time".

FR4 PCB

4-layer FR4 PCB

4-layer FR4 PCB

Name: 4-layer FR4PCB

Material: Fr4

Plate thICkness: 1.6mm

Surface treatment: HASL lead free

Copper thickness: 1OZ

Minimum line: 6 million

Minimum hole: 0.3MM

Application: Router

10-layer FR4 PCB

10-layer FR4 PCB

Name: 10-layer FR4 PCB

Layers: 10 layers

Material: FR-4

Plate thICkness: 2.0mm

board used: FR4

Surface Treatment: Immersion Gold

Minimum aperture: 0.1mm

Outer line width/line spacing: 4/4mil

Inner line width/line spacing: 5/5mil

Solder mask character color: black oil white

10-layer impedance plug hole PCB circuit board

10-layer impedance plug hole PCB circuit board

Name: 10-layer impedance plug hole pcb circuit board

ApplICation industry: consumer electronics

Application Product: Solid State Drive

Layers: 10

Special process: impedance line, resin plug hole, yin and yang copper

Surface Treatment: Immersion Gold

Aspect ratio: 8:1

Material: FR4

Outer line width/line spacing: 4/4mil

Inner layer line width/line spacing: 5/3.5mil

Plate thickness: 2.0mm

Minimum aperture: 0.25mm

6-layer impedance control immersion gold PCB circuit board

6-layer impedance control immersion gold PCB circuit board

Name: 6-layer impedance control immersion gold pcb circuit board

ApplICation industry: consumer electronics

Application product: handheld terminal

Layers: 6

Special process: impedance line

Surface Treatment: Immersion Gold

Material: FR4

Outer line width/line spacing: 3.5/4mil

Inner layer line width/line spacing: 4/4mil

Plate thickness: 1.6mm

Minimum aperture: 0.25mm

4-layer impedance control fine circuit immersion gold PCB circuit board

4-layer impedance control fine circuit immersion gold PCB circuit board

Name: 4-layer impedance control fine circuit immersion gold pcb circuit board

ApplICation industry: consumer electronics

Application product: SMArt home control panel

Layers: 4

Special process: impedance line

Surface Treatment: Immersion Gold

Material: FR4

Outer line width/line spacing: 3.5/3.5mil

Inner layer line width/line spacing: 3.5/3mil

Plate thickness: 0.8mm

Minimum aperture: 0.2mm

4-layer FPC+FR4 soft and hard combination PCB circuit board

4-layer FPC+FR4 soft and hard combination PCB circuit board

Name: 4-layer FPC+FR4 rigid-flex pcb circuit board

ApplICation industry: consumer electronics

Application product: wearable device

Layers: 4

Special process: soft and hard board

Surface Treatment: Immersion Gold

Material: FR4 + FPC

Outer line width/line spacing: 4/3.5mil

Inner layer line width/line spacing: 5/4mil

Plate thickness: 0.5mm

Minimum aperture: 0.2mm

4-layer immersion gold PCB circuit board

4-layer immersion gold PCB circuit board

Name: 4-layer immersion gold pcb circuit board

ApplICation industry: consumer electronics

Application Products: Solid State Drive SSD

Layers: 4

Surface Treatment: Immersion Gold

Material: FR4

Outer line width/line spacing: 6/4mil

Inner layer line width/line spacing: 6/4mil

Plate thickness: 1.1mm

Minimum aperture: 0.3mm

4-layer tin spray impedance circuit board

4-layer tin spray impedance circuit board

Name: 4-layer tin-sprayed impedance circuit board

ApplICation industry: Automotive electronics

Application product: vehicle GPS positioning system

Layers: 4

Special process: impedance board

Surface treatment: lead-free spray tin

Material: FR4

Outer line width/line spacing: 4/4mil

Inner layer line width/line spacing: 7/6mil

Plate thickness: 1.0mm

Minimum aperture: 0.2mm

Standard PCB Production Capability
FeatureCapability
Quality GradeStandard IPC 2
Number of Layers1 - 32layers
Order Quantity1pcs - 10,000,000 pcs
Build Time2days - 5weeks (Expedited Service)
MaterialFR-4 Standard Tg 150°C, FR4-High Tg 170°C, FR4-High-Tg 180°C, FR4-Halogen-free, FR4-Halogen-free & High-Tg
Board SizeMin 6*6mm | Max 600*700mm
Board size tolerance±0.1mm - ±0.3mm
Board Thickness0.4mm - 3.2mm
Board Thickness Tolerance±0.1mm - ±10%
Copper Weight0.5oz - 6.0oz
Inner Layer Copper Weight0.5oz - 2.0oz
Copper Thickness Tolerance+0μm +20μm
Min Tracing/Spacing3mil/3mil
Solder Mask SidesAs per the file
Solder Mask ColorGreen, White, Blue, Black, Red, Yellow
Silkscreen SidesAs per the file
Silkscreen ColorWhite, Blue, Black, Red, Yellow
Surface FinishHASL - Hot Air Solder Leveling
Lead Free HASL - RoHS
ENIG - Electroless Nickle/Immersion Gold - RoHS
ENEPIG - Electroless Nickel Electroless Palladium Immersion Gold - RoHS
Immersion Silver - RoHS
Immersion Tin - RoHS
OSP -Organic Solderability Preservatives - RoHS
Min Annular Ring3mil
Min Drilling Hole Diameter6mil, 4mil-laser drill
Min Width of Cutout (NPTH)0.8mm
NPTH Hole Size Tolerance±.002" (±0.05mm)
Min Width of Slot Hole (PTH)0.6mm
PTH Hole Size Tolerance±.003" (±0.08mm) - ±4mil
Surface/Hole Plating Thickness20μm - 30μm
SM Tolerance (LPI).003" (0.075mm)
Aspect Ratio1.10 (hole size: board thickness)
Test10V - 250V, flying probe or testing fixture
Impedance tolerance±5% - ±10%
SMD Pitch0.2mm(8mil)
BGA Pitch0.2mm(8mil)
Chamfer of Gold Fingers20, 30, 45, 60
Other TechniquesGold fingers
Blind and Buried Holes
peelable solder mask
Edge plating
Carbon Mask
Kapton tape
Countersink/counterbore hole
Half-cut/Castellated hole
Press fit hole
Via tented/covered with resin
Via plugged/filled with resin
Via in pad
Electrical Test
PCB Drilling machine

PCB Drilling machine

PCB pattern plating line

PCB pattern plating line

PCB solder mask expose machine

PCB solder mask expose machine

PCB pattern expose machine

PCB pattern expose machine

Strip film etching line

Strip film etching line

Solder mask screen silk print machine

Solder mask screen silk print machine

Solder mask scrubbing line

Solder mask scrubbing line

PCB Flying Probe Test (FPT)

PCB Flying Probe Test (FPT)

Fully automatic exposure machine

Fully automatic exposure machine

Kingford
Why choose us?
competitive price
competitive price

We have the most competitive price, our own factory, reasonable cost control, no hidden cost

No order threshold
No order threshold

Without any minimum order restrictions, provide high-performance PCBs in the shortest time

24-hour customer service
24-hour customer service

we provide 24-hour service and support, you will receive a reply to your question within 2 hours and a quotation within 24 hours.

Free DFM service
Free DFM service

Before the official production of the PCB, we will conduct a free DFM review service and support free Allegro, Altium, Protel, PADS, OBD, Gerber and other formats.

Kingford
Our PCB&PCBA Solutions

The company has successively cooperated with more than 3,000 high-tech R&D, manufacturing and service companies around the world, with technical solutions covering medical, industrial control, artificial intelligence, Internet of Things, automotive electronics, smart home and other fields.

Kingford
FR4 PCB FAQ
1.Why use FR4 in PCB?
FR4 is the most used material in PCB construction. Circuit boards made of FR4 are strong, waterproof, and provide good insulation between copper layers, minimizing interference and supporting good signal integrity.
2.What material is FR4?
FR4 is a type of printed circuit board substrate made of flame retardant epoxy resin and glass cloth.
3.How thick is the FR4 PCB?
The standard thickness of the PCB is 1.57 mm. Some manufacturers will accommodate other specific thicknesses of 0.78mm or 2.36mm. When we say "thick" or "thin" FR4, we are usually comparing to the standard thickness of 1.57mm.
4.What does FR4 stand for?
FR4 is the standard defined by NEMA (National Electrical Manufacturers Association) for glass-reinforced epoxy laminates. FR stands for "Flame Retardant" and means that the material meets the UL94V-0 standard for the flammability of plastic materials.
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