Maximize Your Performance with Large PCB Products

One of the most crucial parts of product development to get right is PCB design.

With Large-sized circuit boards, this is a major issue.

Unlike regular boards, there are many surface areas to consider, as well as many mounted components.

We are the best in the industry because we provide complete PCB assembly services in addition to PCB of all sizes.

You can message us any time if you need help in Large PCBs.

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Large PCB Items by a Trustworthy Provider

You can trust us to carry out your Large PCB order because:

  • If you request it, we will perform a complete CAM review before manufacturing.
  • If you require a Certificate of Conformity (COC) report, we provide one.
  • You can also ask for product samples from microsections.
  • We have over 12 years of industry experience
  • We have UL certification. It indicates that if you do business in the US or Canada, this is very beneficial.

Due to our extended manufacturing capabilities, we can provide lower price rates for your orders of Large PCB items.

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Large PCB By Feature

Large PCB Assembly

When new devices need to be released, PCB Assembly, whether large, small, or medium-scale is something we can do.

Large FR4 PCB

Whether using standard FR4, high Tg FR4, or those produced by Rogers, we work can make large-sized FR4 PCBs.

Large Multilayer PCB

Large-sized Multilayer PCBs can occasionally become complicated due to signal integrity and stack-up requirements.

Large Power Supply PCB

Large boards are occasionally required by Power Supplies due to their high current demands. Some plants use fossil fuels, others use geothermal.

Large Blank PCB

Prototyping is the main application for large blank PCBs. These are used for PCB design and are sometimes referred to as protoboards or perfboards.

Large Prototype PCB

Some clients are interested in creating new components for existing devices, with prototyping, when making use of large-sized boards.

What is a Large PCB?

By definition, a Large PCB is a specially sized board.

The majority of circuit boards are standard sizes, which is the cause.

The size of a large PCB will exceed 12 inches or 30.48 cm.

Sometimes, the terms “Long PCB” and “Large PCB” are used interchangeably.

This makes sense given that you are talking about boards that are larger than usual.

A capable PCB manufacturer is able to create boards up to 1.5 meters (59 inches) long.

What is a Large PCB board
Why Use a Large PCB

Why Use a Large PCB?

A large PCB is used for a variety of purposes due to its wide range of uses.

Large PCBs are also used because customers can benefit from them.

The power, telecom, and computer industries are among those that procure Large PCBs for use in their corresponding large-scale applications.

In Large PCB assembly, you need to factor in whether you’re creating a prototype or expanding the scope of your device’s performance.

You might need thick copper in your large PCB, even extra thick ones that are weighing up to 20 oz, to add extra strength.

Large PCB Applications and Usage

The variety of applications for large-sized circuit boards is only constrained by the availability of plus-sized electronics. As a result, the list, which includes but is not limited to:

  • Industrial equipment includes things like plant machinery
  • Engine controllers like the components inside of cars.
  • Components of medical devices for scanning technology.
  • LED light displays in malls
  • Monitors for use in public spaces and monitors for use in stadiums.
  • Big entertainment devices for the home.
  • Large-scale computers used for data storage
  • Electronics for monitoring airport surveillance systems
  • Subways and train electronic equipment
Large PCB Applications and Usages

Choosing a Professional Manufacturer for Large PCBs

Choosing a Professional Manufacturer for Large PCB
Choosing a Professional Manufacturer for Large PCB 2

Because we offer customer service around-the-clock, we got your back.

What’s more? Our transaction is more than just buying a Large PCB from us.

We always want to improve your experience, so you can rely on honest customer service.

As a full-stop supplier of all PCB and PCB-related items, we use cutting-edge software to design your board, if you want it.

There are vast differences in customer orders, but you can always rely on us for steadfastness.

Call PCBTok right away!

Large PCB Fabrication

Assembling a Large PCB

The entire process consists of several steps inside a PCB manufacturing house

It is similar to how other circuit boards are typically put together in terms of the production of these Large-sized PCBs. The scale of board is the only distinction.

  • Soldering takes place after applying solder paste to bare circuit boards.
  • There are two types of soldering: reflow soldering and wave soldering.
  • Soldering machines are used for both soldering procedures.
  • After the soldering is complete, the PCB needs to be inspected.
  • The components on the large board are then mounted, if this product is for PCB assembly.
testing a large PCB

We must talk about PCB testing because that is the only way to determine whether a board is faulty.

Large boards cannot afford flaws because they will significantly slow down equipment operation.

Take a look at the list of PCB tests used in a reputable PCB company:

  • Automated test – often referred to as AOI
  • Flying Probe Test
  • Several In-Circuit tests
  • Functional tests such as checks for contamination
  • The Microsection Test
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Creating the Superior PCB | PCBTok

Our Large PCB items are enhanced by high-quality prepregs and laminates,

Ensuring you have a fantastic product in your hands.

Large PCB Production Details As Following Up

NO Item Technical Specification
Standard Advanced
1 Layer Count 1-20 layers 22-40 layer
2 Base Material KB、Shengyi、ShengyiSF305、FR408、FR408HR、IS410、FR406、GETEK、370HR、IT180A、Rogers4350、Rogers400、PTFE Laminates(Rogers series、Taconic series、Arlon series、Nelco series)、Rogers/Taconic/Arlon/Nelco laminate with FR-4 material(including partial Ro4350B hybrid laminating with FR-4)
3 PCB Type Rigid PCB/FPC/Flex-Rigid Backplane、HDI、High multi-layer blind&buried PCB、Embedded Capacitance、Embedded resistance board 、Heavy copper power PCB、Backdrill.
4 Lamination type Blind&buried via type Mechanical blind&burried vias with less than 3 times laminating Mechanical blind&burried vias with less than 2 times laminating
HDI PCB 1+n+1,1+1+n+1+1,2+n+2,3+n+3(n buried vias≤0.3mm),Laser blind via can be filling plating 1+n+1,1+1+n+1+1,2+n+2,3+n+3(n buried vias≤0.3mm),Laser blind via can be filling plating
5 Finished Board Thickness 0.2-3.2mm 3.4-7mm
6 Minimum Core Thickness 0.15mm(6mil) 0.1mm(4mil)
7 Copper Thickness Min. 1/2 OZ, Max. 4 OZ Min. 1/3 OZ, Max. 10 OZ
8 PTH Wall 20um(0.8mil) 25um(1mil)
9 Maximum Board Size 500*600mm(19”*23”) 1100*500mm(43”*19”)
10 Hole Min laser drilling size 4mil 4mil
Max laser drilling size 6mil 6mil
Max aspect ratio for Hole plate 10:1(hole diameter>8mil) 20:1
Max aspect ratio for laser via filling plating 0.9:1(Depth included copper thickness) 1:1(Depth included copper thickness)
Max aspect ratio for mechanical depth-
control drilling board(Blind hole drilling depth/blind hole size)
0.8:1(drilling tool size≥10mil) 1.3:1(drilling tool size≤8mil),1.15:1(drilling tool size≥10mil)
Min. depth of Mechanical depth-control(back drill) 8mil 8mil
Min gap between hole wall and
conductor (None blind and buried via PCB)
7mil(≤8L),9mil(10-14L),10mil(>14L) 5.5mil(≤8L),6.5mil(10-14L),7mil(>14L)
Min gap between hole wall conductor (Blind and buried via PCB) 8mil(1 times laminating),10mil(2 times laminating), 12mil(3 times laminating) 7mil(1 time laminating), 8mil(2 times laminating), 9mil(3 times laminating)
Min gab between hole wall conductor(Laser blind hole buried via PCB) 7mil(1+N+1);8mil(1+1+N+1+1 or 2+N+2) 7mil(1+N+1);8mil(1+1+N+1+1 or 2+N+2)
Min space between laser holes and conductor 6mil 5mil
Min space between hole walls in different net 10mil 10mil
Min space between hole walls in the same net 6mil(thru-hole& laser hole PCB),10mil(Mechanical blind&buried PCB) 6mil(thru-hole& laser hole PCB),10mil(Mechanical blind&buried PCB)
Min space bwteen NPTH hole walls 8mil 8mil
Hole location tolerance ±2mil ±2mil
NPTH tolerance ±2mil ±2mil
Pressfit holes tolerance ±2mil ±2mil
Countersink depth tolerance ±6mil ±6mil
Countersink hole size tolerance ±6mil ±6mil
11 Pad(ring) Min Pad size for laser drillings 10mil(for 4mil laser via),11mil(for 5mil laser via) 10mil(for 4mil laser via),11mil(for 5mil laser via)
Min Pad size for mechanical drillings 16mil(8mil drillings) 16mil(8mil drillings)
Min BGA pad size HASL:10mil, LF HASL:12mil, other surface technics are 10mil(7mil is ok for flash gold) HASL:10mil, LF HASL:12mil, other surface technics are 7mi
Pad size tolerance(BGA) ±1.5mil(pad size≤10mil);±15%(pad size>10mil) ±1.2mil(pad size≤12mil);±10%(pad size≥12mil)
12 Width/Space Internal Layer 1/2OZ:3/3mil 1/2OZ:3/3mil
1OZ: 3/4mil 1OZ: 3/4mil
2OZ: 4/5.5mil 2OZ: 4/5mil
3OZ: 5/8mil 3OZ: 5/8mil
4OZ: 6/11mil 4OZ: 6/11mil
5OZ: 7/14mil 5OZ: 7/13.5mil
6OZ: 8/16mil 6OZ: 8/15mil
7OZ: 9/19mil 7OZ: 9/18mil
8OZ: 10/22mil 8OZ: 10/21mil
9OZ: 11/25mil 9OZ: 11/24mil
10OZ: 12/28mil 10OZ: 12/27mil
External Layer 1/3OZ:3.5/4mil 1/3OZ:3/3mil
1/2OZ:3.9/4.5mil 1/2OZ:3.5/3.5mil
1OZ: 4.8/5mil 1OZ: 4.5/5mil
1.43OZ(positive):4.5/7 1.43OZ(positive):4.5/6
1.43OZ(negative ):5/8 1.43OZ(negative ):5/7
2OZ: 6/8mil 2OZ: 6/7mil
3OZ: 6/12mil 3OZ: 6/10mil
4OZ: 7.5/15mil 4OZ: 7.5/13mil
5OZ: 9/18mil 5OZ: 9/16mil
6OZ: 10/21mil 6OZ: 10/19mil
7OZ: 11/25mil 7OZ: 11/22mil
8OZ: 12/29mil 8OZ: 12/26mil
9OZ: 13/33mil 9OZ: 13/30mil
10OZ: 14/38mil 10OZ: 14/35mil
13 Dimension Tolerance Hole Position 0.08 ( 3 mils)
Conductor Width(W) 20% Deviation of Master
1mil Deviation of Master
Outline Dimension 0.15 mm ( 6 mils) 0.10 mm ( 4 mils)
Conductors & Outline
( C – O )
0.15 mm ( 6 mils) 0.13 mm ( 5 mils)
Warp and Twist 0.75% 0.50%
14 Solder Mask Max drilling tool size for via filled with Soldermask (single side) 35.4mil 35.4mil
Soldermask color Green, Black, Blue, Red, White, Yellow,Purple matte/glossy
Silkscreen color White, Black,Blue,Yellow
Max hole size for via filled with Blue glue aluminium 197mil 197mil
Finish hole size for via filled with resin  4-25.4mil  4-25.4mil
Max aspect ratio for via filled with resin board 8:1 12:1
Min width of soldermask bridge Base copper≤0.5 oz、Immersion Tin: 7.5mil(Black), 5.5mil(Other color) , 8mil( on copper area)
Base copper≤0.5 oz、Finish treatment not Immersion Tin : 5.5 mil(Black,extremity 5mil), 4mil(Other
color,extremity 3.5mil) , 8mil( on copper area
Base coppe 1 oz: 4mil(Green), 5mil(Other color) , 5.5mil(Black,extremity 5mil),8mil( on copper area)
Base copper 1.43 oz: 4mil(Green), 5.5mil(Other color) , 6mil(Black), 8mil( on copper area)
Base copper 2 oz-4 oz: 6mil, 8mil( on copper area)
15 Surface Treatment Lead free Flash gold(electroplated gold)、ENIG、Hard gold、Flash gold、HASL Lead free、OSP、ENEPIG、Soft gold、Immersion silver、Immersion Tin、ENIG+OSP,ENIG+Gold finger,Flash gold(electroplated gold)+Gold finger,Immersion silver+Gold finger,Immersion Tin+Gold finge
Leaded Leaded HASL
Aspect ratio 10:1(HASL Lead free、HASL Lead、ENIG、Immersion Tin、Immersion silver、ENEPIG);8:1(OSP)
Max finished size HASL Lead 22″*39″;HASL Lead free 22″*24″;Flash gold 24″*24″;Hard gold 24″*28″;ENIG 21″*27″;Flash gold(electroplated gold) 21″*48″;Immersion Tin 16″*21″;Immersion silver 16″*18″;OSP 24″*40″;
Min finished size HASL Lead 5″*6″;HASL Lead free 10″*10″;Flash gold 12″*16″;Hard gold 3″*3″;Flash gold(electroplated gold) 8″*10″;Immersion Tin 2″*4″;Immersion silver 2″*4″;OSP 2″*2″;
PCB thickness HASL Lead 0.6-4.0mm;HASL Lead free 0.6-4.0mm;Flash gold 1.0-3.2mm;Hard gold 0.1-5.0mm;ENIG 0.2-7.0mm;Flash gold(electroplated gold) 0.15-5.0mm;Immersion Tin 0.4-5.0mm;Immersion silver 0.4-5.0mm;OSP 0.2-6.0mm
Max high to gold finger 1.5inch
Min space between gold fingers 6mil
Min block space to gold fingers 7.5mil
16 V-Cutting Panel Size 500mm X 622 mm  ( max. ) 500mm X 800 mm ( max. )
Board Thickness 0.50 mm (20mil) min. 0.30 mm (12mil) min.
Remain Thickness 1/3 board thickness 0.40 +/-0.10mm( 16+/-4 mil )
Tolerance ±0.13 mm(5mil) ±0.1 mm(4mil)
Groove Width 0.50 mm (20mil) max. 0.38 mm (15mil) max.
Groove to Groove 20 mm (787mil) min. 10 mm (394mil) min.
Groove to Trace 0.45 mm(18mil) min. 0.38 mm(15mil) min.
17 Slot Slot size tol.L≥2W PTH Slot: L:+/-0.13(5mil) W:+/-0.08(3mil) PTH Slot: L:+/-0.10(4mil) W:+/-0.05(2mil)
NPTH slot(mm) L+/-0.10 (4mil) W:+/-0.05(2mil) NPTH slot(mm) L:+/-0.08 (3mil) W:+/-0.05(2mil)
18 Min Spacing from hole edge to hole edge 0.30-1.60 (Hole Diameter) 0.15mm(6mil) 0.10mm(4mil)
1.61-6.50 (Hole Diameter) 0.15mm(6mil) 0.13mm(5mil)
19 Min spacing between hole edge to circuitry pattern PTH hole: 0.20mm(8mil) PTH hole: 0.13mm(5mil)
NPTH hole: 0.18mm(7mil) NPTH hole: 0.10mm(4mil)
20 Image transfer Registration tol Circuit pattern vs.index hole 0.10(4mil) 0.08(3mil)
Circuit pattern vs.2nd drill hole 0.15(6mil) 0.10(4mil)
21 Registration tolerance of front/back image 0.075mm(3mil) 0.05mm(2mil)
22 Multilayers Layer-layer misregistration 4layers: 0.15mm(6mil)max. 4layers: 0.10mm(4mil) max.
6layers: 0.20mm(8mil)max. 6layers: 0.13mm(5mil) max.
8layers: 0.25mm(10mil)max. 8layers: 0.15mm(6mil) max.
Min. Spacing from Hole Edge to Innerlayer Pattern 0.225mm(9mil) 0.15mm(6mil)
Min.Spacing from Outline to Innerlayer Pattern 0.38mm(15mil) 0.225mm(9mil)
Min. board thickness 4layers:0.30mm(12mil) 4layers:0.20mm(8mil)
6layers:0.60mm(24mil) 6layers:0.50mm(20mil)
8layers:1.0mm(40mil) 8layers:0.75mm(30mil)
Board thickness tolerance 4layers:+/-0.13mm(5mil) 4layers:+/-0.10mm(4mil)
6layers:+/-0.15mm(6mil) 6layers:+/-0.13mm(5mil)
8-12 layers:+/-0.20mm (8mil) 8-12 layers:+/-0.15mm (6mil)
23 Insulation Resistance 10KΩ~20MΩ(typical:5MΩ)
24 Conductivity <50Ω(typical:25Ω)
25 Test voltage 250V
26 Impedance control ±5ohm(<50ohm), ±10%(≥50ohm)

PCBTok offers flexible shipping methods for our customers, you may choose from one of the methods below.

1. DHL

DHL offers international express services in over 220 countries.
DHL partners with PCBTok and offers very competitive rates to customers of PCBTok.
It normally takes 3-7 business days for the package to be delivered around the world.


2. UPS

UPS gets the facts and figures about the world’s largest package delivery company and one of the leading global providers of specialized transportation and logistics services.
It normally takes 3-7 business days to deliver a package to most of the addresses in the world.


3. TNT

TNT has 56,000 employees in 61 countries.
It takes 4-9 business days to deliver the packages to the hands
of our customers.


4. FedEx

FedEx offers delivery solutions for customers around the world.
It takes 4-7 business days to deliver the packages to the hands
of our customers.


5. Air, Sea/Air, and Sea

If your order is of large volume with PCBTok, you can also choose
to ship via air, sea/air combined, and sea when necessary.
Please contact your sales representative for shipping solutions.

Note: if you need others, please contact your sales representative for shipping solutions.

You can use the following payment methods:

Telegraphic Transfer(TT): A telegraphic transfer (TT) is an electronic method of transferring funds utilized primarily for overseas wire transactions. It’s very convenient to transfer.

Bank/Wire transfer: To pay by wire transfer using your bank account, you need to visit your nearest bank branch with the wire transfer information. Your payment will be completed 3-5 business days after you have finished the money transfer.

Paypal: Pay easily, fast and secure with PayPal. many other credit and debit cards via PayPal.

Credit Card: You can pay with a credit card: Visa, Visa Electron, MasterCard, Maestro.

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  • “I would recommend PCBTok to anyone due to their excellence, and I intend to use them for any future projects I have. I even got the best setup for my PCB project from the IT guys. Their names escape me, but they were extremely knowledgeable! I was informed by the salespeople how many days I would have to wait before receiving my order. Even the most cost-effective times to ship the items were suggested.”

    Jasper Madzimure, Electronics Distributor from Molepolole, Botswana
  • “The PCBTok sales team provided excellent recommendations from both an aesthetic and technical standpoint. They were able to finish the job quickly, which demonstrated to me their level of professionalism. There are no hidden fees, and their prices are reasonable given the high caliber of work they produce. To ensure that you know exactly what you paid for, you receive an itemized invoice. You can also have a work-in-progress report. You don’t need to call anyone else for all of your circuit boards; save their number.”

    Gene Kobata, Supply Chain Manager from Honiara, Solomon Islands
  • “The PCBTok team was very accommodating and questioned me to ensure they were ready to fulfill my order. Speaking of which, the customer service staff’s punctual arrival and friendly demeanor were commendable for a non-English speaking team. They were able to finish the installation of my PCB order quickly and expertly, and I am extremely happy with both their services and products.”

    Cleo Anton, Purchasing Supervisor from Heraklion, Greece
Large PCB Special Considerations

When designing large PCBs, you should be aware of the following:

  • Impedance Control –It is a problem that is related to designing high-frequency PCBs.
  • PCB Routing — If these are high-speed applications, you must be aware of signal interference.
  • Carrying power currents on PCB traces are a consideration.
  • Through-hole drilling is more practical, but microvia may result in greater energy savings.

Lastly, large boards may need more financial investment in your part.

Large PCB Design Tips

The largest size of PCB can be up to 59 inches.

What comes with size are special considerations in the PCB schematic.

You can rely on professional PCB software like Altium, KiCad and Eagle.

If you opt for paid subscription, it will give you an easier time, especially if you need to collaborate on your designs.

You board can be a wholly Rigid board, or it can have PCB connectors.

In this case, Polyimide PCB can be a great option for better thermal performance.

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