Professionally Designed 20 Layer PCB by PCBTok

In essence, a 20-Layer PCB has twenty copper layers integrated into them that are altered by a substrate referred to as an epoxy resin. Moreover, they are considered multilayered.

PCBTok has adequate quality in-stock resources to fulfill your purchases. Additionally, in every Prototype PCB, we offer quick turnaround service within a 24-hour timeframe.

Other than that, all files undergo extensive file CAM review before production, we conduct 100% E-Test and AOI, and we offer different layer types from 1 to 40.

Get to enjoy our best offers by sending us your 20 Layer PCB specifications today!

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Aiming to Supply the First-Rate 20 Layer PCBs

Since PCBTok places a high priority on quality products, we constantly develop our staff members’ capabilities to provide higher-quality services.

In order to create a superb 20-Layer PCB, we consistently use top-tier building resources and superior technologies. Additionally, we guarantee total customer fulfillment.

Likewise, we can individually tailor this product to your needs and intended uses; we have the necessary equipment to fulfill your requirements.

As PCBTok doesn’t accept subpar work, we can ensure a spectacular product outcome.

We can’t wait to implement your ideal board parameters with you alongside us. Please get in touch with us for guidance straight away!

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20-Layer PCB By Copper Thickness

1 oz Copper PCB

The 1 oz Copper PCB that we particularly integrate into this board offers low dielectric constant, controlled resistance, and high decomposition temperature that can be ideal for countless applications, including medical, automotive, and industrial.

2 oz Copper PCB

The 2 oz Copper PCB that we particularly incorporate in this board can be a great alternative for 1 oz Copper; however, it can be expensive because its thermal control is way better than the 1 oz. In addition, they are ideal for wireless devices and wearables.

3 oz Copper PCB

The 3 oz Copper PCB that we particularly integrate into this board has glass fiber and wood pulp as its reinforcing material. Moreover, it has an excellent heat and electrical conductor, and both sides of the board have copper-clad reinforcements.

4 oz Copper PCB

The 4 oz Copper PCB that we particularly incorporate in this board can be deployed in circuit systems that necessitate large current capabilities; thus, they are commonly found in industrial applications, control systems, and military devices.

6 oz Copper PCB

The 6 oz Copper PCB that we particularly integrate into this board can be highly suitable for high-load applications since it possesses high current carrying capacity. In addition, it features the effective use of thermal vias that distribute heat evenly.

10 oz Copper PCB

The 10 oz Copper PCB that we particularly incorporate in this board has been widely deployed in the military industry, including weapon control systems and radar management. Additionally, it is utilized in power supplies and charging systems.

What is a 20 Layer PCB?

One robust multilayer circuit board has 20 layers or more. It has 20 layers, each constructed of copper and epoxy resin alternately. In addition, solder masks, silkscreen, etc. are included. Also, the materials used in its production have a low dielectric constant.

It typically ranges from 3.2 to 4.8 mm thick, with a nearly 10% thickness variation. In technological circuits, it provides outstanding structural accuracy. They are appropriate for HDI operations because of how the signal layers and ground layers are organized.

In high-speed signal layers of Multilayered PCBs, this feature guarantees trustworthy insulation. In summary, a 20-Layer PCB offers exceptional performance in electrical gadgets due to its superb features.

Contact us right away to learn more about this board.

What is a 20 Layer PCB?
Base Materials of 20-Layer PCB

Base Materials of 20-Layer PCB

The 20-Layer PCB is made primarily of FR4, epoxy resins, copper foils, and CEM-3. Also, copper foil and fiberglass resin ingredients are squeezed and fused collectively.

The uniformity of the mechanical and electrical qualities is guaranteed by these elements, which are also inexpensive. Another good PCB substance that offers a sufficient glass transition temperature, a low coefficient of thermal expansion, and exceptional moisture resistance and particle infiltration is FR4.

Additionally, it guarantees adequate dielectric strength, which is crucial for the 20-Layer circuit board’s shielding qualities.

Also, Rogers 4350b and 4360 are used in High TG 20-Layer PCBs to achieve a transition temperature of more than 180 °C. This PCB can be used with a wide range of digital communication systems owing to these qualities.

Primary Advantages of 20-Layer PCB

Generally, there are countless benefits a 20-Layer PCB can offer in your applications and devices. In this section, we’ll discuss its other significant advantages.

  • Miniature Design – It has a compact design for signal and ground layers that are stacked up to one another; thus, they are ideal for smaller devices.
  • Durability – In comparison to other multilayered boards, it is recognized to be highly reliable due to its layer count which makes the board’s structure robust.
  • Current Conduction – Since it can tolerate various copper traces, it is capable of handling current-carrying loads efficiently.
  • Functionality – They are widely preferred in HDI, High-Frequency Signal Transfer, and High-Power PCB devices and applications.
  • High Density – It is feasible to place components on its surface that can boost efficiency for High-Speed purposes; thus, ideal for lightweight devices.
Primary Advantages of 20-Layer PCB

Go for PCBTok's Superb Performance 20-Layer PCB

Go for PCBTok's Superb Performance 20-Layer PCB
Go for PCBTok's Superb Performance 20-Layer PCB

We are PCBTok, one of the top producers in China and a business that prioritizes authenticity. We do have about twelve years of experience in this field.

That being said, we are qualified to meet your required criteria for a particular usage. We are capable of producing it quickly both domestically and abroad.

PCBTok is the best choice for you since we strictly monitor the quality of our goods, only utilize high-quality, eco-friendly materials, provide a variety of 20-Layer PCB varieties based on your needs, and are favored by substantial IT and automotive corporations.

In the end, we have a large group of professionals who are trained, seasoned, and competent to support you. Regarding our pricing, we constantly have incredible offers!

Purchase from us right away to take advantage of our excellent discounts!

20-Layer PCB Fabrication

Design Specifications of a 20-Layer PCB

In order to produce a well-functioning 20-Layer PCB, there are certain parameters that need to be followed. We’ll discuss all of its specifications in this section.

Firstly, it should be composed of twenty copper layers. Secondly, ensure that the product is capable of handling high-density and high-speed purposes.

Another thing to consider is its ability to support both buried vias and blinded vias. Therefore, having said that, it should have a minimum of 0.5 mm BGA Pin-Pitch.

Also, it should have a minimum separation and width for routing of 4 mils, a minimum hole size of the via should be 8 mils, and a signal differential of 10 GHz.

If you wish to have in-depth knowledge of these, feel free to message us.

Drawbacks of 20-Layer PCB

Even though a 20-Layer PCB has countless advantages on them, it can still possess flaws. However, these can be addressed through the right manufacturer.

In essence, there are only two (2) disadvantages to producing this kind of board. First, it can be challenging to design and manufacture due to its layer count.

Thus, it is essential that the manufacturer will pay close attention during its production phase since if neglected, it can significantly affect its performance.

Ultimately, it possesses substantial complications on them compared with the Single-Sided and Double-Sided PCBs; it is essential to have a reliable supplier.

Consult us; we guarantee that your boards won’t experience this.

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PCBTok | Reputable 20-Layer PCB Chinese Supplier

Our goal is to give our clients a 20 Layer PCB that they can utilize to the maximum.

All we want is for your time with us to be as pleasant as possible.

20-Layer 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.

Quick Quote
  • “Since PCBTok performs its job with the utmost professionalism, I’ve been looking for the proper terms and expressions to convey my encounter with them. My 20-Layer PCBs are all fully functioning and of the highest quality. They also provide the most welcoming atmosphere in their customer relations. They took care of all of my demands, handled my transaction, and shipped my things incredibly swiftly and without any difficulties. Personally, I’m blown away by the performance they gave me, and I’m thrilled and delighted with the way they treated me. I’ve decided to stick with them going forward because they’re excellent at providing my PCB necessities.”

    Samuel Monroe, Supply Chain Director from Detroit, Michigan
  • “I have never once had a problem with how PCBTok communicates with me or treats me during my entire voyage with them. Assisting me till I obtained my 80 pieces of 20-Layer PCB purchase from them, they promptly attended to all of my requests. If you’re still not sure where to buy your PCB requirements, PCBTok is the place to go. Their work is excellent, and I truly admire their workmanship performed on it. I can guarantee that it’s worthwhile to test their offerings and services.”

    Jake Pearson, Procurement Component Manager from Ballarat, Victoria
  • “I started purchasing from PCBTok in early 2021, and they’ve always been pleasant and accommodating. They continue to give me a first-rate shopping experience and exceptional products. Every time I had a problem with one of my buys, they took care of it right away and didn’t stop until I was happy with the outcome. I never had a bad encounter with them during that time. But because this is my first time giving them feedback, I believe they ought to be aware of our perspectives. If you still have any reservations about PCBTok’s competence, now is your chance to select them as your supplier. They are a reputable Chinese PCB manufacturer on a global scale.”

    Darius Sullivan, Electronics Engineer from Omaha, Nebraska
Major Difficulties in Constructing 20-Layer PCB

Since a 20-Layer PCB features thicker layers, thinner dielectric layers, and compact placements on them compared with lower-layered count boards, it requires exceptional attention during its manufacturing phase to avoid potential errors on them.

Below are some of the challenges in producing this particular board:

  • Layer Alignment – Since its outer layer alignment tolerance is lower than the inner layers, it can be difficult to stack them up efficiently.
  • Arrangements of Inner Layers – Due to the materials of this board that possesses High TG value, High Dielectric Strength, and Low Relative Permittivity; thus, it requires excellent design control and impedance stability.
  • Drilling – As this board has a high layer count, it can deliver high roughness during the drilling phase; hence, it becomes extremely challenging to perform it.
  • Layer Coupling and Pressing – Similar to drilling, pressing difficulties to rise as its inner layer count increases. Thus, leading its coupling highly challenging as well.
What are the Applications of 20-Layer PCB?

There are countless applications you can deploy a 20-Layer PCB; we will discuss some of the industries that utilize this sort of board in their devices.

  • Consumer Electronics – They are useful in the production of devices like calculators, music players, watches, cellphones, and other gadgets that are often used in homes and workplaces.
  • Communications Industry – It can be used to create satellites, GPRS, radar electronics, communication towers, and computer servers.
  • Computers and Laptops – They are beneficial in the creation of motherboards, power supplies, graphic cards, EEPROMs, and other components.
  • Automation – Considering industrial operations are frequently subject to pressure, filth, weather, moisture, and stress, the 20-Layer PCB is particularly dependable. This PCB is also used in a variety of industrial applications, including conveyor belts, robots, and the manufacture of automobiles.
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