What you Need to Know About FR1 PCBs

FR1 PCBs are one of the most popular choices for PCB manufacturing because of their excellent economy, which is perfect for short-run or prototype projects.

Used for electronic products as well as mechanical, medical and other engineering applications, this flexible, low cost technology has become the industry standard for anything requiring an interconnection board.

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Respectable FR1 PCB Manufacturer | PCBTok

PCBTok is the leading designer and manufacturer of electronic circuits for commercial and defense applications. We specialize in producing high quality FR1 PCBs with the latest design features along with customized options.

At PCBTok, a respected FR1 PCB manufacturer, we are dedicated to providing the best manufacturing experience possible. Whether you need to design a single prototype or manufacture thousands of boards, our state-of-the art manufacturing equipment and excellent customer support team will ensure that your project is nothing short of amazing.

At PCBTok, our FR1 manufacturing and assembly team has served the electronic industry for over 10 years. We are dedicated to bringing high quality end-to-end products and services to our customers.

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FR1 PCB By Feature


With full flexibility while having a robust, small form factor, low cost, and easy to use. A flame retardant and self-extinguishing material that can be used as interconnect and internal plane in your circuit boards.


Versatile, flexible and high quality PCB that is used widely in manufacturing and testing applications. FR1 is a one-sided, surface mountable and void-free PCB with excellent solderability of ENIG coating.

Immersion Tin PCB

It has excellent electrical conductivity and corrosion resistance, as well as low thermal expansion rates, which make it a reliable product for use across many different applications.

Immersion Silver PCB

Immersion Silver FR1 is a continuous, conductive layer of silver that results in a cost-effective performance and reliability solution for many mixed-signal applications like wireless connectivity, industrial controls, etc.


ENEPIG FR1 PCB also has fine thermal conductivity and can be used to dissipate quite perfectly heat from the circuit so that your components can work safely and with precision.


HASL FR1 is popular bare board material as one of the best PCB materials due to its electro-mechanical properties. HASL features a non-conductive coating that eliminates the need for a separate resin in the solder plating.

What is FR1 Printed Circuit Boards?

FR1 Printed Circuit Boards are a type of circuit board made from fiberglass-reinforced epoxy laminate. FR1 PCBs are hard, flat materials that consist of a thin layer of copper over a non-conductive phenolic resin.

FR1 boards are commonly used in electronics because they can be produced in large quantities quickly and easily. They are usually manufactured by stamping or etching the copper on a surface that has been chemically coated with an insulating material.

FR1 is most often used for applications where there is low demand for heat dissipation, but it is also commonly used in high-end consumer electronics such as smartphones and tablets.

What is FR1 Printed Circuit Boards
Equipment for PCBs

Most Common Type of Copper PCB | FR1 PCB

FR1 PCBs are the most common type of copper PCB on the market. FR1 stands for “flame retardant 1,” and it’s exactly what it sounds like: a flame-retardant, fiberglass-reinforced printed circuit board that can be used for anything from audio equipment to small appliances.

FR1 PCBs are durable, lightweight, and easy to use. They’re also relatively inexpensive compared to other types of PCBs. If you’re looking for a way to make a project more durable or waterproof without breaking the bank, FR1 PCBs are an excellent option.

Difference and Variation of FR1 to other Fire-Resistant PCBs

FR1 is a fire-resistant PCB that has been developed by PCBTok in order to provide customers with an alternative to fire-resistant PCB and other commonly used materials in the manufacturing of printed circuit boards.

Compared to other fire-resistant PCBs, FR1 has several advantages:

  • FR1 is more affordable than FR4, which means that it can be more readily substituted for FR4.
  • FR1 is easier to process than other fire-resistant materials, making it easier for manufacturers who have never worked with these types of materials before.
  • FR1 is lighter than other fire-resistant materials, making it easier for manufacturers who need to work with lightweight boards (such as those being used in smartphones).
Difference and Variation of FR1 to other Fire-Resistant PCBs

PCBTok | World Class FR1 PCB Manufacturer

PCBTok World Class FR1 PCB Manufacturer (1)
PCBTok World Class FR1 PCB Manufacturer (1)

PCBTok is a world-class FR1 PCB manufacturer. We provide a wide range of services from design to manufacturing to testing and delivery. Our goal is to provide the highest quality products and customer service in the industry.

We use a state of the art manufacturing process that ensures high quality, repeatable results every time. Our products are made using the best materials available and are 100% RoHS compliant.

We know that when you’re looking for a reliable manufacturer of FR1 PCBs, you need to be sure that you’re working with someone who has experience in this area and knows what it takes to produce high quality products on time and within budget. That’s why we take pride in being one of the top FR1 PCB! Call us now!

FR1 PCB Fabrication

Environmentally Friendly Synthetic Resin Bonded Paper

The FR1 PCB board is a material that is designed to be used in the production of environmentally friendly PCB boards. The FR1 is made from resin bonded paper, which is produced with a special binding process to make it more durable than other boards.

The FR1 PCB board is a revolutionary product that has been created by PCBTok to meet the needs of those who want to use environmentally friendly products in their daily lives.

Excellent Flame Retardant Rating

The FR1 PCB has an excellent flame retardant rating, which means it can withstand extreme temperatures and high heat without catching fire. This is important for electronic devices that use heat to function, such as laptops and cellphones.

The FR1 PCBs we offer are manufactured with flame retardant materials.  The FR1 PCBs we offer are also RoHS compliant, meaning they do not contain hazardous substances such as lead, mercury, and cadmium.

OEM & ODM FR1 PCB Applications

IoT Wearables

FR1 is a high-performance PCB for wearable applications. This can be used for IoT wearables, such as trackers, smart shoes, and smart clothing.


Our FR-1 boards are lead-free, ROHS compliant and are manufactured to meet or exceed all industry requirements, especially if they have robots.

Arduino Calculators

The FR1 PCB is a high quality, easy to manufacture board that allows you to create a professional product using Arduino boards and other parts.


The FR1 is a flexible PCB which is used in mobile-phone display devices and other apparatuses that use touch functions.


The FR1 PCB is an ideal board to make your tablets. The FR1 PCB has everything you need to get started on manufacturing modular smart devices.

Simple and Reliable FR1 PCB PCBTok
Simple and Reliable FR1 PCB | PCBTok

PCBTok’s FR1 PCB is a simple and reliable printed circuit board that works well for both prototypes and mass production.

FR1 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
  • “I am a researcher at an academic lab where I work with others. We do research and development on various projects and we rely on our suppliers to deliver the highest quality products. We’ve been working with PCBTok for one year now, and they have consistently delivered the best quality PCBs on time. I have never had any issues with them and they are very responsive if I have questions. They are always very responsive and their support team is very helpful. They deliver high quality PCBs at great prices and have always delivered on time.”

    Kiano Lede, Computer Hardware Professional from Alberta, Canada
  • “We have been working with PCBTok for a number of years now and have always been impressed with the professionalism, quality and value for money of their products. Excellent service, quick responses to any queries, great prices, and above all else the best quality boards. I would recommend PCBTok to anyone looking for quality PCBs.”

    Michel Johnson, IT Support Specialist, Buenos Aires, Argentina
  • “PCBTok is a great online PCB supplier. They have a wide range of products and are fast at production and delivery. Great company! I had been searching for a reliable PCB supplier on the internet when PCBTok presented itself. PCBTok has always delivered our boards on time, and it is a very friendly company to do business with. We appreciate your work PCBTok.”

    David Guetta, Procurement Category Manager from Plovdiv, Bulgaria
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