Globally Recognized 3 oz Copper PCB by PCBTok

We have been recognized worldwide because of our commitment to providing our consumers only the highest-quality 3 oz Copper PCB and top-notch services.

  • Twelve years of dependable service in the PCB industry.
  • Payment options are versatile.
  • Before placing large amounts of purchases, test items are distributed.
  • We will send a weekly report to your PCB regularly.
  • Your engineering-related questions will be available to you in about an hour.
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The Superior 3 oz Copper PCB from PCBTok

Since we started in the PCB industry, we have been supplying our consumers with superior and top-notch 3 oz Copper PCB. Thus, this brought us lots of recognition worldwide.

PCBTok strives to please our customers by listening to their suggestions and ideas and putting them into action.

With us, you can guarantee that we will work hard to achieve your desired specifications and requirements without experiencing any defects in the final product.

If you’re looking for a manufacturer that will value your ideas, PCBTok is the one!

We will always consider our client’s needs and be delighted to help and listen to them. Your PCB concepts can become a reality using PCBTok.

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3 oz Copper PCB By Feature


The HDI PCB offers exceptional signal integrity because of its blind vias technology; hence, this can be ideal for the communication industry and antenna systems. In addition, it is reliable and reasonably priced.

Multilayer PCB

The Multilayer PCB is ideal for applications requiring numerous components in a compact design board but has a maintained weight. Additionally, this board is commonly found in industrial, medical, and military applications.

Power Supply PCB

The Power Supply PCB offers exceptional thermal control to the entire board due to its incorporated internal copper layer. This particular layer is mainly responsible for evenly distributing the heat in the whole circuit board.


The FR4 PCB is one of the most popular board types because it is relatively inexpensive and has a wide array of benefits. This includes high dielectric strength and resistance to moisture, and it has a High TG value.

Flexible PCB

The Flexible PCB is the perfect option if you plan to integrate this particular board in a constrained space since it is flexible to install. In addition, it eliminates connectors, improves thermal management, and is inexpensive.

Rigid PCB

The Rigid PCB is among the most popular type of board in the PCB industry since it offers exceptional reliability and can be deployed in various applications. This includes aerospace, automotive, and electronics industry.

3 oz Copper PCB By Layer (5)

  • 2-Layer PCB

    The 2-Layer PCB has plenty of room for a ground grid; hence, they are known to reduce the electrical noise of the board. Also, it has enough space for additional components compared to the single-layer type of board.

  • 4-Layer PCB

    The 4-Layer PCB has enhanced ground and supply layers that can prevent the occurrences of EMI. In addition, this type of layered board is widely deployed in many electronic devices because of its wide array of benefits.

  • 6-Layer PCB

    The 6-Layer PCB has exceptional electrical properties; hence it can provide high-speed performance even in compact design devices. Additionally, it has a quality-driven design, enhanced durability, and a lightweight design.

  • 10-Layer PCB

    The 10-Layer PCB has reduced radiation emissions from its power planes and mass. Moreover, it has a decreased occurrence of cross-talk, minimizes external noise, and is cost-efficient in product production.

  • 12-Layer PCB

    The 12-Layer PCB is made using high-quality and most reliable raw materials to withstand even the heaviest applications, increasing its reliability. Also, it has enhanced flexibility, and it is more powerful.

3 oz Copper PCB By Color (6)

  • Green PCB

    The Green PCB is the most common color used in many circuit boards because of its good contrast between the planes, traces, and empty spaces. In addition, this type of color comes in two varieties; we have gloss and matte finish.

  • White PCB

    The White PCB is primarily used in most LCD applications because of its contrast between the silkscreen layer and the black printing on the board. However, it can be hard to clean, maintain, and remove stains.

  • Blue PCB

    The Blue PCB is popular among the Arduino boards; however, we still deploy this color to any circuit board, including the 3 oz Copper PCB. However, when checking defects, we recommend using a magnifying tool.

  • Black PCB

    The Black PCB offers minimal contrast and provides more visibility than the white-colored solder mask. They are commonly found in LCD back panels since it isn’t distracting to the eyes of the viewers when looking at the screen.

  • Red PCB

    The Red PCB is becoming the second most popular solder mask color in the market because it offers good eye contrast and visibility. In addition, cleaning the red flux residues of this color is made easy.

  • Yellow PCB

    The Yellow PCB has almost the same advantages as the green one; however, its silkscreen doesn’t offer a good contrast relationship with the board. Also, light-colored residues in this board are easily cleaned.

Main Features of 3 oz Copper PCB

The following are the specifications of a 3 oz Copper PCB:

  • Reinforcing Material – It is made of glass fiber and wood pulp. In addition, it has a copper clad on both sides of the board.
  • Heat Dissipation – It has improved the ability to transfer heat throughout the board, preventing uneven heating and damage to the board.
  • International Standards – Its materials conform to the established guidelines.
  • Conductor – It has exceptional electrical and heat conductor properties.

Kindly message us through our socials if you have further clarifications concerning these features. We will address it as soon as we can.

Main Features of 3 oz Copper PCB
Materials Deployed in a 3 oz Copper PCB

Materials Deployed in a 3 oz Copper PCB

A 3 oz Copper PCB isn’t an exception; almost all types of Copper PCBs are constructed using Copper Lamination Board. Additionally, it uses the following materials:

  • Tin Alloy – It adds up to the overall thickness of the board.
  • Conductive Components – It helps to strengthen the circuit integrity of the board.
  • Steel Wood – It aids in durability, sturdiness, and reliability.
  • Prepreg Materials – We deploy it to withstand extreme temperature conditions.
  • Carbon Steel – This adds to the board’s durability since it is shock-resistant.

Please contact us if you want further details regarding its materials.

Choosing High-Quality 3 oz Copper PCB

Since we value our consumers in PCBTok, we want to share with you the factors to consider in selecting a high-grade 3 oz Copper PCB. Here is some of it:

  • Weight – It should be on average weight to avoid breakage during use.
  • Space – It should have enough space to integrate circuits.
  • Availability of Components and Connections – Before you decide to manufacture it, your desired materials should be accessible to the supplier.
  • Impedance – The thickness of the PCB is directly proportional to its impedance control; the dielectric material of a 3 oz Copper PCB is capable of dealing with it.
  • Flexibility – We suggest picking thick layers to prevent breakage.
Choosing High-Quality 3 oz Copper PCB

Choose the First-Rate 3 oz Copper PCB from PCBTok

Choose the First-Rate 3 oz Copper PCB from PCBTok
Choose the First-Rate 3 oz Copper PCB from PCBTok

One factor to consider in choosing the proper manufacturer for your 3 oz Copper PCB is their experience; they should have adequate knowledge in the industry. PCBTok has more than twelve (12) years of working in the industry.

Concerning this, we can follow your desired specifications without hesitations and problems; we will make it happen regardless of its complexity.

Additionally, we constantly ensure that all of our products satisfy international guidelines and are thoroughly tested to evaluate their performance.

PCBTok utilizes sophisticated technologies and materials in manufacturing your 3 oz Copper PCB. Furthermore, we can provide you with the best deal if you plan to purchase from us. Grab our best deals today, and contact us!

3 oz Copper PCB Fabrication

Design Considerations: 3 oz Copper PCB

One of the essential factors to perform is the design of your board since this can dictate the overall performance of it your applications.

In designing your 3 oz Copper PCB, we only consider four (4) essential factors; trace width, trace spacing, hole placement, and connection points.

We carefully consider its trace width since it provides the overall connection of components to the board. In terms of spacing, we ensure that it has ten mils.

Now, for hole placement, we thoroughly consider it since it will determine the positioning of the components and connection points for the location of the electronic component.

If you want more information about this, feel free to contact us.

Quality Standards of 3 oz Copper PCB

PCBTok values the quality of its 3 oz Copper PCB for our consumer’s benefit; hence, we always ensure that we adhere to the quality standards.

We complied with the following standards; namely, BS-123200, IEC-61189-11, BS-6221-5, BS-CECC-23200-801, and BS-EN-61188-5-3.

All of these are crucial in determining the performance of your 3 oz Copper PCB. Hence, we are highly strict in complying with these mentioned quality standards.

In addition, we conduct thorough inspections and evaluations to solidify our products’ performance further. We want you to experience only the best items with us.

Feel free to message us if you have clarifications about this.

OEM & ODM 3 oz Copper PCB Applications

Communications Industry

Since most devices and equipment in the communications industry are prone to heating, it requires a board that can tolerate it; a 3 oz Copper PCB can perform it.

Consumer Electronics

Due to the 3 oz Copper PCB capability to reduce the occurrences of electricity wastage; they are widely preferred in consumer electronics.

Aerospace Equipments

One of the advantages of using a 3 oz Copper PCB is its exceptional mechanical support to the device; hence, they are widely used in aerospace devices.

Automotive Industry

Most automotive industry devices require a board that features exceptional heat and electrical conductors; a 3 oz Copper PCB has this certain feature.

Medical Instruments

Since 3 oz Copper PCB has an enhanced signal transmission; hence the occurrence of signal loss while transmitting is reduced in medical instruments.

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PCBTok - China’s Highly Reputed 3 oz Copper PCB Manufacturer

Our main goal is to consistently provide our clients with the best 3 oz Copper PCB and create positive interactions.

We hold our customers in the highest regard and value them greatly.

3 oz Copper 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
  • “This is the first time I’ve had exceptional products and outstanding service. To test its performance, I ordered roughly 20 pieces of 3 oz Copper PCBs, and I’m satisfied with the outcome. Now that all my test pieces are functioning well and my supervisor is impressed with their performance, I’ve decided to repurchase from PCBTok. Many thanks for your tireless efforts, PCBTok!”

    Alexander Burns, Project Engineer from Raleigh, North Carolina
  • “PCBTok never failed to impress me every time I order from them regarding their offerings. Since I became their valued customer in 2018, they have continued to treat me with the same respect as before. With PCBTok, I can comfortably say that PCBTok will take care of my concerns because they consistently update me on the status of my PCB orders every week and always show me the full transparency of the steps my items took to get to me. My clients in the industry have expressed satisfaction with the flawless operation of every product I’ve provided for their devices. Therefore, I can say that I am forever grateful to PCBTok. Also, I will continue buying PCBs and availing services from them.”

    Thomas Barett, Electronics Engineer from Manchester, United Kingdom
  • “One of the right decisions I made in my life is getting PCBTok as my number one supplier of PCBs. They have the most organized process and professional staff I have encountered. Also, all of the products I always get from them are zero defects, and they always put my concepts in mind and suggestions into action. I feel like I am one of their VIP customers every time I transact with them; however, they do not have that special kind of treatment. They value all of their customers fairly; all the customers, even if it’s your first time purchasing from them, you get to experience the most special treatment. I also love that they provide me with weekly updates concerning my orders; it puts my mind at ease. If you’re still reluctant to purchase from them, you should hurry and grab your PCB products. I guarantee you that you won’t regret it.”

    Shirley Price, Design Engineer from Juneau, Alaska
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