Fail-Safe 4 oz Copper PCBs of PCBTok

PCBTok is a leading provider of fail-safe 4 oz copper PCBs. Our products are manufactured in a state-of-the-art facility, and we use only high-quality materials. The result is a PCB that is both durable and reliable. We offer several options for our customers, including:

  • We’re always here to support your custom PCBs
  • All printed circuit boards meet IPC Class 2 or 3
  • Follow up your local working time and quote in time
  • Engineering questions(EQ) will be sending within 1-2hours
  • Attending the trade shows such as Electronica Munich and PCBWest
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Meticulously Manufactured PCBTok 4 oz Copper PCB

Copper PCBs are used in various electronic devices, ranging from computers to cell phones. These boards are manufactured using a process that involves heavy machinery and workers who have been trained to handle the equipment. The main goal is to create a board that is both durable and reliable.

PCBs are the foundation of every electronic product. They’re the circuit boards that contain all the electrical components and controls. At PCBTok, we make PCBs with care and precision, using our proprietary manufacturing process. We start by selecting the best materials for your project, including 4 oz copper.

At PCBTok, we are proud to manufacture the highest quality PCBs in the industry. Our 4 oz. copper boards are carefully constructed professionally and backed by our satisfaction guarantee.

Our 4 oz PCBs from PCBTok are used in a wide range of applications, including consumer electronics like cell phones and tablets; industrial devices like medical equipment and semiconductors; and military applications such as missiles and aircraft systems.

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4 oz Copper PCB By Type

Single-Sided PCB

Has a thin thickness which meets the requirements of most applications requiring high quality printed circuit boards in addition to small size and weight.

Double-Sided PCB

Most ideal choice for high frequency circuits, where surface mount leadframe has large thermal resistance, allows solder masking on both sides of the board.

Multilayer PCB

To achieve the best combination of performance and reliability, we use the highest quality materials for Multilayer 4 oz Copper PCB  environmentally friendly.

Flexible PCB

Allows your project to bend, twist, and move in ways previously impossible with traditional rigid PCB, an adhesive backing.

Rigid PCB

Stable performance and high quality. Rigid 4 oz Copper PCB. Customization available, design a custom printed circuit board today!

Rigid-Flex PCB

Rigid-Flex 4 oz Copper is a printed circuit board in which the copper foil is combined with a rigid core, which serves to enhance rigidity.

4 oz copper PCB by Layer (5)

  • 4 Layer PCB

    4 layer 4 oz copper pcb is ideal for use in your next project. It comes with two component side and two signal side. Built in power/ground plane and the holes on centerline, so you can work with standard drill patterns.

  • 6 Layer PCB

    The 6 Layer 4 oz Copper PCB features the same outer dimensions and trace clearance, but includes four layers of copper to handle high current applications. This PCB can be used for projects that require high density traces!

  • 8 Layer PCB

    This four ounce, high density 8-layer PCB is made with the highest quality and incredibly durable. It comes in a variety of different sizes and thicknesses, making it ideal for any size project you might have.

  • 10 Layer PCB

    The 10 Layer PCB is the ultimate example of our expert manufacturing capabilities. Produced using our advanced 10-layer production process and is designed to support complex power and ground distribution.

  • 12 Layer PCB

    The 12 Layer PCB is also used when you need to build a large circuit, or when you want to isolate certain parts of a circuit. This is specifically useful in RF applications where certain frequencies need to be isolated.

4 oz copper PCB by Soldermask Colors (5)

  • Green PCB

    With green solder mask, ideal for DIY electronics and prototyping. The green color is perfect for switches and if you need to match the color of your other components.

  • Yellow PCB

    Made from high quality materials and meets all the specifications. This yellow soldermask goes through rigorous inspections to ensure quality standards are met.

  • Blue PCB

    Made from blue soldermask and 4 oz copper. The optimal thickness of 4 oz. copper provides superior performance in both strength and thermal conductivity.

  • Black PCB

    Black PCB is a black soldermask color made of 4 oz pure copper. The solder mask prevents oxidation and contamination of the surface of the freshly-laid board.

  • Red PCB

    Give your circuit boards life with this Red PCB. When you make a new circuit, the Red colored soldermask 4 oz Copper PCB makes a great first impression for others to see.

Introducing PCBTok 4 oz Copper PCB

PCBTok is a board manufacturer with over 10 years of experience in the industry. With our new product, PCBTok 4 oz copper PCB, we are offering a different kind of circuit board that is affordable and durable.

Now you can get a high-quality circuit board at an affordable price. This is an ideal option for those who want to prototype their product or start their own business. With PCBTok 4 oz copper PCB, you can create your own custom-made circuit boards without spending too much money.

You can also use it as a replacement part if you have damaged ones or if your old ones are not working properly anymore. Our boards are designed in such a way that they will last longer than other similar products on the market today. Our manufacturing process has been optimized so that we can make sure that each individual component meets the strictest standards set by ISO certification requirements.

Introducing PCBTok 4 oz Copper PCB A PCB for Everyone
PCBTok A Dependable Source of 4 oz Copper PCB

PCBTok | A Dependable Source of 4 oz Copper PCB

PCBTok is a dependable source of 4 oz copper PCBs. We are dedicated to providing our customers with the highest quality products at affordable prices.

We offer standard, high-quality PCBs that can be customized to suit your needs. Our engineers will work with you to design the perfect layout for your project and make sure that it functions exactly as you want it to.

If you need assistance determining what type of copper PCB is right for your project, please contact us today!

The Perfect Combination of Copper and PCB | 4 oz Copper PCB

There are many people who think that the perfect combination of copper and PCB is a perfect combination, but in fact, it is not. The best combination for copper and PCB is 4 oz copper PCB. There are many reasons why this combination is better than others, but first we will talk about the benefits of 4-ounce copper PCB.

4-ounce copper PCB is stronger than other types of material such as 2 ounce copper or 3 ounce copper because it has more metal inside it which means that it can withstand more pressure than other types of material.

The Perfect Combination of Copper and PCB | 4 oz Copper PCB

4 oz Copper PCB Production

4 oz Copper PCB Production
4 oz Copper PCB Production (1)

PCBTok is a leading provider of 4 oz copper pcb, which are used in various industries. They are manufactured using modern techniques, and their quality is unmatched. The company has been in business for many years, and they have a great reputation. Their products are competitively priced, and they offer discounts to repeat customers.

PCBTok’s 4 oz Copper PCB is a great option for anyone who wants to get their hands on a high-quality product without breaking the bank. This copper PCB is made from 100% pure copper, which means that you can rest assured knowing that it will last for years to come.

You’ll be able to get your hands on this 4 oz copper PCB at an affordable price point—making it an excellent choice for anyone looking to save money while still receiving top-quality service and products!

4 oz Copper PCB Fabrication

PCBTok 4 oz Copper PCB’s Quality Testing Process

PCBTok is a leading PCB manufacturer and supplier in Shenzhen, China. We are specializing in manufacturing and supplying various PCB products, such as 4-layer PCB, 6-layer PCB and so on. Our company has strict quality control system to ensure every product has high quality. In this section we will show you our quality testing process for our 4oz copper PCBs.

We also conduct thorough inspection of all components used in our products during the production process to ensure that they meet the required standards of our company and meet customer requirements.

Choose Your 4 oz PCB’s Soldermask Colors

When you buy PCBs, the soldermask color is one of the last details you’ll decide on. We’re here to help you choose a soldermask color that fits your project. The primary purpose of the soldermask is to protect other components on the board from oxidation and corrosion, but it also plays an important role in distinguishing between different parts on a circuit board.

The soldermask color of your 4 oz PCB can make a big difference in the way it looks. It can also affect how long it lasts and the visual appeal of your product, so it’s important to choose one that works best for you!

OEM & ODM 4 oz Copper PCB Applications

Aerospace Industry

Used frequently in aerospace applications due to its high strength, excellent thermal stability, and conductivity. Ideal for use on inner layers due to the low solubility that results in limited corrosion over time.

Power Distribution

Designed to distribute power among various components. It features a 4 ounce copper thickness and a tin-silver-copper plating process. Great for any application where you need high current capability and low thermal resistance.

Welding Equipment

Use in our welding equipment to produce a beautiful and professional finish. It is perfect for both beginners and professionals. Lighter and resistant to shock, providing the best protection for your welding or other electrical equipment.

Solar Panel

These high-quality conductive double sided copper boards are specially made for a variety of electrical and electronic applications. Features: High quality copper plating on both sides to provide reliable connections, great solderability and durability.

Automotive Industry

A type of printed circuit board which has the capability to withstand extreme temperature and humidity levels. 4 oz PCB for Automotive Industry has more copper filling compared to other types of printed circuit boards.

Dependable and Reputable 4 oz Copper PCB PCBTok
Dependable and Reputable 4 oz Copper PCB | PCBTok

Looking for a dependable and reputable 4 oz copper PCB? At PCBTok, we offer the best quality products at an affordable price.

Inquire about 4 oz Copper PCB from PCBTok today!

4 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
  • “PCBTok is a dependable and reliable company, and they are incredibly nice and attentive. We were having an issue with an order and they worked hard to correct it, even after the parts had already been shipped. They are always available to answer any questions, and they are eager to help you succeed in your business. The PCBs always arrive on time, which is not something you can say about many companies these days. That’s hard to find these days! They will be our go-to PCB supplier from now on.”

    Jerome Myers, IT Expert / Engineer from Ontario, Canada
  • “The PCBTok facilities are top notch. I was a bit concerned about using an overseas company for work that requires such precision, but the quality of their work is excellent. They are highly responsive and professional. I needed some bare PCBs and microphone PCBS for my project and it was easy to get in touch with them, communicate my needs and get the PCBs quickly. They were very responsive and helpful. I would definitely use them again.”

    Justin Sykes, Tech Company Purchasing Agent from Illinois
  • “We have been using PCBTok for our bulk projects, and we are very pleased with their level of service. They are always responsive to our needs and go above and beyond in helping us get our jobs done. Their prices are the lowest I’ve found and the quality is excellent. I highly recommend PCBTok for anyone’s PCB needs.”

    Joshua Gwaltney, Procurement Staff of Electronics Company, Taiwan
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