EMS PCB for Design, Assembly and Testing of your PCBs

An EMS PCB fabrication services company should be capable of providing customers with high-quality, low-cost PCB services. We can assist in the component selection and assembly process.

PCBTok is one of the most reliable EMS PCB manufacturer in the market. We have been providing our services to our clients around the globe for more than a decade now. Our team consists of highly skilled engineers and designers who are committed towards providing you with quality EMS PCB.

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Strictly Monitored EMS PCB to Ensure Quality

PCBTok is a leading EMS PCB manufacturer in China. We are dedicated to providing the highest quality products and services, and we have strict quality control processes that ensure we meet our customers’ expectations.

Our commitment to quality begins with selecting only the most qualified engineers and technicians for our team, who are then rigorously trained in all aspects of our production process. We also perform an extensive testing process on all of our EMS PCB before they ship out.

We, at PCBTok have strict quality control measures in place to ensure that our EMS PCB meet the highest standards for quality. Our experts are constantly monitoring each batch of EMS PCB for quality assurance purposes, which means that you can be confident that your product will meet or exceed your expectations when it arrives at your doorstep.

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EMS PCB By Types

Prototype PCB

EMS Prototype PCB is an inexpensive and flexible solution for product design. EMS PCB allows you to quickly replace mechanical parts and make it easy to get started on product development.

Quick-Turn PCB

Designed to turn around your PCB as soon as possible, depending on your board features. This is ideal if you need to catch up with a short lead time or due date and can’t afford to wait for full-turn service.

Low-Volume Production

EMS Low-Volume Production of printed circuit boards is an affordable, turnkey solution for low-volume production and prototype manufacturing. With the ability to produce small quantities with fast turnarounds.

High-Volume Production

With the help of high-speed laser machine and multiple components placement head, the production processes become more efficient when making high volume custom design EMS PCBs.


The HDI EMS printed circuit board is a high density interconnect (HDI) technology offering high performance, reliability, and cost-effectiveness by integrating the system board with the electronic components.

High-Frequency PCB

A compound printed circuit board, which is designed and manufactured to meet high frequency operation requirements. Commonly used in manufacturing high-speed radar and transceivers.

EMS PCB Introduction

Companies that create, produce, test, distribute, and offer return/repair services for electronic components and assemblies for original equipment manufacturers are known as electronics manufacturing services (EMS) companies.

EMS providers might be small, one-person operations or global, multi-location corporations. Usually, they are in charge of everything, including original design, tooling, product assembly, and packaging of printed circuit boards. The term “electronics contract manufacturing” also refers to the idea of offering EMS on a turnkey basis.

EMS PCB Introduction
Design and Testing Services

Design and Testing Services

Electronic design and testing is a very complicated process, and if you are not familiar with it, it can be hard to know where to start. If you do have the capital to carry out such activities, you may want to consider outsourcing some of the design activities to an Electronic manufacturing services (EMS) company like PCBTok.

PCBTok’s EMS PCB companies have in-house teams that can support the design and testing of any type of electronic product. As the Electronic Manufacturing Services (EMS) company, we have manufacturing capabilities it would be wise to keep things under the same roof and outsource the entire project here at PCBTok.

Manufacturing and Production Capabilities

PCBTok as your Electronic manufacturing services company has all the equipment, software and expertise needed to create any type of electronic device or system. PCBTok as your EMS PCB company has extensive experience in micro-electronics and is able to deliver high quality prototypes or mass production volumes with great flexibility.

In addition to electronics manufacturing, we also provide production assistance for all stages of product development – from concept to production release – and offer a wide range of services including: PCB layout; mechanical design including 3D CAD solid modeling; assembly design; testing and qualification; documentation creation etc.

Manufacturing and Production Capabilities

Expectations with PCBTok as your EMS PCB Company

Expectations with PCBTok as your EMS PCB Company
Expectations with PCBTok as your EMS PCB Company (1)

PCBTok is a leading EMS PCB Company that provides customers with an exceptional quality of service and products. We provide a wide variety of services to customers through our expert team of professionals.

We pride ourselves on being able to provide the best service possible so that our clients can focus on other aspects of their business while we handle their PCB needs. To ensure this happens, we offer a variety of different options for getting your order done quickly and efficiently.

We believe that excellent customer service starts with understanding exactly what you need. We want to make sure that you know what we can do for you and how we can help your business succeed. If you have any questions about our services or about anything else related to PCBTok, please don’t hesitate to contact us!

EMS PCB Fabrication

OEM vs EMS Difference

An OEM is a company that sells parts, components and even finished products to other companies. An OEM doesn’t make products itself; instead, it purchases them from third-party suppliers. In addition, an OEM doesn’t just sell these items for its own use; it also sells them to its customers.

In contrast, an EMS is an electronics manufacturing service provider that specializes in the production of electronic equipment. It typically provides contract manufacturing services to other companies. The main difference between an EMS and an OEM is that an EMS doesn’t sell any of its products directly to consumers or businesses.

SMT and THT Technology for EMS PCB

Both SMT and THT Technology is available for EMS PCB. It is important to note that although these two technologies are different, they have different processes and requirements.

Through-Hole technology involves inserting components with tails or leads into holes drilled in the PCB. These components will be described as through hole components.

Surface Mount Technology is a method that is used to assemble electronic circuits, where the components are mounted or placed directly onto the top surface of printed circuit boards.

OEM & ODM EMS PCB Applications


The EMS printed circuit board for telecommunications is designed to ensure a high-quality, reliable connection between your equipment and the rest of your telecommunications system.


EMS PCB are an essential to any product that uses a radio frequency. RF circuits vary in complexity from simple to complex. Can be used to build a single-chip transceiver or multi-chip transceiver.

Aircraft Instrumentation

EMS PCB for aircraft instrumentation is a high-quality, low-cost solution for your product needs. We take pride in our ability to deliver high-quality products on time, and we can help you do the same.

CD Player

The EMS PCB designed for CD players. The PCB has been designed with high-quality materials and components. Made using the advanced technology, which makes it durable and reliable.


EMS PCB which is designed for Remote Control Toys, is a high quality, reliable, and cost-effective circuit board that can be used in a variety of applications especially for remote control toys.

Trustworthy and Steadfast EMS PCB Company PCBTok
Trustworthy and Steadfast EMS PCB Company | PCBTok

Looking for a trustworthy and steadfast EMS PCB company? PCBTok is the perfect option for you. Our company has been providing services for the past 12 years. We have been serving clients from around the world.

EMS 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
  • “Good communication, fast response and helpful attitude. Very good quality of service. The product was the same as described on the website and in the order confirmation email. PCBTok is the best! I have purchased more than a few PCBs from them and they’re always made to spec and fast delivery. The customer service is amazing too, they make sure you’re happy with your order! I would recommend PCBTok to my friends, family and everybody else.”

    Beverley Alli, Systems Engineer from Lincolnshire, England
  • “PCBTok is a reliable supplier for the electronic circuit boards. I have ordered from them many times and the quality of their products are good. The price is also affordable. The customer service is very responsive, and they always send you samples before you place your order. In addition, they will also provide you with free shipping when you place your order in bulk amount. Their delivery time is also fast and most of all, they’re so much cheaper than other suppliers that offer the same products with better quality.”

    Efren Saldivar, Electronics Technician from Brownsville, Texas, U.S.
  • “The customer support at PCBTok is excellent! A handful of my PCBs required a different finish, and they quickly altered it for me. The only business I could locate that offered free delivery was PCBTok, and you guys more than lived up to my expectations! My boards arrived in fantastic shape, and shipping only took approximately 3 days. When I required assistance with some design issues, the man who answered the phone was quite helpful, and overall PCBTok is a terrific site to get PCBs!”

    Russell Maurice Johnson, Computer Hardware Engineer from Ontario, Canada
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