Item  PCB Prototype Standard PCB
Application scope Design review, prototype to quality testing Full production
Quality Class Standards IPC1 IPC2
Bonus service / Free DFM checking
Number of Layers 1 - 8layers 1 - 32layers
Order Quantity 5pcs - 100pcs 1pc - 10000+pcs
Build Time 2days - 7days 3days - 18days
Material FR4 FR4, Aluminum, Flex,Roges, etc
Board Size Min 10mm x 10mm
Max 500mm x 500mm
Min 6mm x 6mm
Max 600mm x 700mm
Board Thickness 0.4mm - 2.0mm 0.4mm - 3.2mm
Copper Weight (Finished) 1.0oz - 2.0oz 0.5oz - 6.0oz
Min Tracing/Spacing 5mil/5mil 3mil/3mil
Min Annular Ring 5mil 3mil
Min Drilling Hole Diameter 8mil 6mil, 4mil - laser drill
Min Spacing Trace to Pad 5.5mil 4mil
Min Spacing Trace to Copper 6mil 6mil
Soldermask Sides As per the file As per the file
Soldermask Color Green, White, Blue, Black, Red, Yellow LPI, Green, White, Blue, Black, Red, Yellow
Silkscreen Sides As per the file As per the file
Silkscreen Color White, Black White, Blue, Black, Red, Yellow
Surface Finish HASL
ENIG - Electroless Nickle/Immersion Gold - 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
PCB thickness tolerance ±0.1mm - ±10% ±0.1mm - ±10%
PCB size tolerance ±0.1mm - ±0.3mm ±0.1mm - ±0.3mm
PTH hole size tolerance ±0.08mm - ±0.15mm ±0.08mm - ±0.15mm
Impedance control / ±5% - ±10%
Gold fingers / Yes, chamfer at 20, 30, 45, 60
UL marking/Date code marking / Yes
Buried/Blind vias / Yes
Peelable solder mask / Yes
Edge plating / Yes
Carbon Mask / Yes
Kapton tape / Yes
Countersink/counterbore hole / Yes
Half-cutted/Castellated hole / Yes
Press fit hole / Yes
Via in pad / Yes
V-scoring limitation 60*60mm 25*25mm
Solder-stop coating bridge / Yes

There are different Quality Class Standards in the industry. Most commonly followed is class 1 & 2.

Class 1 is for General Electronic Products and for testing and verification of Designs.
Class 2 is for Dedicated Service Electronic Products such as communication equipment,sophisticated business machines, instruments where high performance and extended life is required and for which uninterrupted service is desired.
Class 3 products are used in certain types of medical, aeronautics, and military applications for which uninterrupted and high reliability service is required.

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