Your Custom Experienced Prototype PCB Assembly Manufacturer in China

PCBMay is a professional prototype PCB assembly supplier in China, we will provide many types of prototype PCB assembly for you.

  • Over 12 years prototype PCB assembly manufacturing experience
  • Prototype PCB assembly from rigid, flexible, and rigid-flex PCBs
  • No MOQ for new orders, even one piece
  • 100% E-test and AOI inspection
  • 7/24 sales and engineering tech support
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PCBMay: Your Premier Prototype PCB Assembly Supplier in China

If you are looking for a reliable prototype PCB assembly manufacturer, PCBMay is your best choice.

PCBMay is not only just a leading PCB fabrication manufacturer but also a one-stop provider for all your PCB assembly requirements. We provide different kinds of prototype PCB assembly to customers all around the world. From components sourcing, PCB fabrication, prototype PCB assembly to final testing, all processes are in-house.

We handle all types of prototype PCB assembly with any quantity, small-batch assembly, low volume PCB assembly, SMT PCB assembly.

Send us your Gerber data and BOM list files, you will get an awesome product.

Many Different Types of Prototype PCB Assembly Speed up Your Projects

Lead-free Protoype PCB Assembly

PCBMay doesn’t only build lead-free circuit boards but also provides RoHS Compliant PCB assembly services: lead-free material analysis, single and double-sided assemblies, wave soldering of lead-free, lead-free circuit board rework, lead-free selective soldering, and much more.

Consignment Prototype PCB Assembly

The client provides the necessary components in the consignment PCB assembly process. It seems reasonable to go with the consignment PCB assembly process if you manufacture expensive products having exclusive parts. This will ensure that your product is not replicated and yet the manufacturing process stays cost-effective.

Mixed Signal Prototype PCB Assembly

Mixed-signal PCB assembly is now very popular because using this design of the PCB board(hybrid PCB) actually reduces the cost in the long run. Thus mixed-signal IC’s are actually a staple in consumer electronics. Thus mixed-signal print circuit boards are great for prototyping and for low volume production as well.

Automotive Prototype PCB Assembly

PCBMay offers different kinds of power PCB(heavy copper PCB), any electronic product has a power supply assembly, which needs to be changed from AC voltage to DC voltage, including our common TVs, computers, DVDs, stereos, switches, routers, etc., which have power supplies.

Consumer Product Prototype PCB Assembly

A security device or token is given to authorized users for them to use when authenticating to network resources, such as Bank security device, access control device, keypad, wireless keypad, Weigand keypad, card reader, prox card, and key fob, camera,alarm system, detector, etc.

Home Appliance Prototype PCB Assembly

There’re many types of smart switches, such as smart switches, lighting equipment, smart door locks, electric curtains, bathroom toilets, kitchen appliances, sweeping robots, and terminal controllers. The features of this product are video demands, remote access, and energy saver.

PCBMay is a Reliable Prototype PCB Assembly Manufacturer for You

If you’re looking for a high-quality prototype PCB assembly supplier?PCBMay is always here to support you.

PCBMay will handle prototype PCB assembly quantities from 1 to 50 pieces, our engineering team works very closely to optimize the panel design and review full CAM files prior to manufacture.

We will send engineering questions and component issues to you prior the prototype PCB assembly proceed. Since we get your BOM list, our purchase team follow all the components part number or model, supplier, and ect. to source them. We will give you replacement if couldn’t find it.

We have brought many high-tech equipments, especially the automatic SMT production lines and wave soldering production lines.

PCB Assembly Production line

Related Prototype PCB Assembly Products

SMT PCB Prototype Assembly
SMT PCB Prototype Assembly
PCBMay can provide different kinds of SMT PCB Assembly, please send inquiry to
BGA Prototype PCB Assembly
BGA Prototype PCB Assembly
PCBMay is a professional BGA PCB Assembly supplier in China, we can help you when you have the demand.
LED Prototype PCB Assembly
LED Prototype PCB Assembly
LED PCB assembly is very popular in every industry, PCBMay could provide quick turn prototype LED PCB assembly for you.
Power Supplier PCB Assembly
Power Supply PCB Assembly
PCBMay could also provide different types of Power Supply PCB Assembly, we can provide PCB and assembly service for you.

Prototype PCB Assembly Details As Following Up

Please see the capabilities from PCBMay as below:

No.ItemProcess Capability Parameter
1Order Quantity≥1PCS
2Quality GradeIPC-A-610
3Lead Time24 hours expedited service can be offered. 3- 4 days normally for PCBA prototype orders. We will give you an accurate lead time when we quote for you.
5Board TypeRigid PCB, Flexible PCB, metal core PCB
6Min Package01005 (0.4mm*0.2mm)
7Max PackageNo limit
8Mounting Accuracy±0.035mm(±0.025mm)  Cpk≥1.0 (3σ)
9Surface FinishLead/Lead-free HASL, Immersion gold, OPS, etc.
10Assembly TypesSurface mount (SMT), Through-hole (DIP), Mixed Technology (SMT & Thru-hole)
11Component SourcingTurnkey (All components sourced by PCBMay), Partial turnkey, Kitted/Consigned
12BGA PackageBGA Dia. 0.14mm, BGA 0.2mm pitch
13SMT Parts PresentationCut Tape, Partial reel, Reel, Tube, Tray, Laser-cut Stainless Steel
14Cable AssemblyWe supply custom cables, cable assemblies, wiring looms/harnesses, and power leads for various industries including automotive, security, mining, medical, and entertainment.
15StencilStencil with or without frame (offered free by PCBMay)
16Quality InspectionVisual inspection; AOI checking; BGA placement – X-RAY checking
17SMT Capacity3 Million~4 Million Soldering Pad/day
18DIP Capacity100 Thousand Pins/day

Why Choose PCBMay for Your Prototype PCB Assembly

PCBMay will become your excellent partner for your prototype PCB assembly, whether you have a single-sided PCB or multilayer PCB.

Our fastest delivery time for your prototype PCB assembly will be 48h when the components are ready. There’re three options for the components as following:

  • You will order all components from Digikey or Mouser and then provide them to us, we will help you to assembly in-house and then ship it to you;
  • You will provide partial components to us and we will purchase the left components, then assembly and ship them to you;
  • We will provide turnkey prototype PCB assembly from all component sourcing, PCB manufacturing, and assembly together.

Our PCB assembly plant has a workshop of 8,000 square meters and over 500 workers. There are 6 fully automatic SMT production lines, 3 wave soldering production lines, 5 assembly lines, and auxiliary testing and aging facilities.

Whoever you are an electrical engineer, a purchasing manager, a project manager, or a product designer looking for prototype PCB assembly, PCBMay will be your excellent prototype PCB assembly supplier in China.

If you have any questions, please quote us.

Prototype PCB Assembly: The Ultimate FAQ Guide

Only an expert and professional company can accelerate the prototype PCB assembly process, easier, and better.

Prototype PCB assembly

Prototype PCB assembly

The use of stencils for PCB assembly is becoming an increasingly common approach with the transition to SMT components and the ever-growing number of components used.

What is Prototype PCB Assembly Process

A prototype of a printed circuit board is its technological model, created as a result of design and construction, but has not yet been put into mass production.

Further testing and examination of the prototype allow developers to:

  • Identify and eliminate inaccuracies
  • Design errors
  • Defects in the created printed circuit board

Having tested the prototype, the customer can check how functional and efficient the newly designed printed circuit board is.

How it meets certain technological requirements?

The direct manufacturer of the future series of printed circuit boards, in turn, having studied the Prototype PCB Assembly, can correlate the actual production capabilities with it, adjust something, improve and rationalize.

Why a Prototype PCB Assembly is Important before Mass Production

In the process of designing a printed circuit board, it is almost impossible to avoid mistakes and inaccuracies.

This is why starting mass production without testing a prototype is likely to result in a large number of defective items.

As a result, the project as a whole will receive a significant but senseless rise in price. Its implementation will stretch over time.

The process of creating a prototype circuit board involves a fairly large number of stages.

This process begins with the:

  1. Definition of the characteristics of the circuit.
  2. Then the stage of designing the circuitry of the board
  3. Then the stages of designing the board at the physical level and its production

The entire process is completed by Prototype PCB Assembly.

Prototype PCB assembly

Prototype PCB assembly

What is the Prototype PCB Assembly Process

1, Solder Paste Application

At the beginning of the assembly process, solder paste must be applied to a new,component-free PCB.

Solder paste is applied only to those areas of the board where you need to create conductive contact between the component and the metalized mounting pad.

Typically, a soldering stencil is used for this. Moving along the solder mask placed directly on the board and fixed in the desired position, the slider squeezes a small amount of solder paste onto the board through the holes in the mask.

Since the solder mask is formed from data generated during the PCB design process, it has holes where the pads should be.

And thus solder is applied only to the pads that are intended for soldering.

There are two basic types of solder stencils:

  1. Frame stencils for use in soldering equipment
  2. Without frame stencils for hand-applying solder paste

2, Component Placement

Component placement can be done either manually or using the equipment. In manual placement, the technician uses tweezers to position each component on a specific area of ​​the solder paste.

In machine placement, a special mechanism with components loaded into it grabs the components and places them on the board.

The pulling force of the solder paste is usually sufficient to hold the component in position.

Component placement equipment uses component location and orientation data (which is usually stored in Centroid files) as reference information to correctly place components on the board.

Centroid files are usually generated from data generated by the CAD system during board development.

3, Reflow Heating and Soldering

After the components are installed on the board, the next step in the Prototype PCB Assembly process is to run the board through the bulk solder.

Reflow soldering is the most common method for soldering SMT components, especially for prototypes, although wave soldering equipment is sometimes used.

4, Testing

Functional testing of the board in order to verify its functionality.

As you can see from this sequence of steps, the Prototype PCB Assembly process begins with the application of solder paste.

To securely solder pinned components, the hole in the board must be filled with solder.

Another prerequisite for reliable soldering is that there is no solder outside the mounting pads of the SMT component, otherwise short circuits may occur.

5, Benefits of Using Solder Paste

The process of pre-applying solder paste to the board and then placing the components in the solder-paste areas has great advantages.

Because the placement quality is improved as the solder paste is evenly distributed under the components before reflow.

The question, however, is how best to apply the solder paste. For this, I use a stencil.

To get a PCB prototype assembly quote for your custom PCB project, please click the following button and upload your circuit spec and BOM. We will give the PCB Assembly price within 48 hours.

Prototype PCB assembly

Prototype PCB assembly

What are the Advantages of Prototype PCB Assembly

  1. Trying new suppliers with smaller quantity orders can help you pick the correct one suited for your needs at a minimal expense.
  2. Discovering issues with your design in the prototype stages is much less expensive than discovering issues when you have production quantities of thousands of units.
  3. Testing your prototypes is another great way to discover issues before getting to production quantities and thus taking minimal losses in case an issue arises.
  4. Once you have your prototype PCBAs in hand you can now use them to construct prototypes of your final product as well and conduct tests and reviews on those as well.
  5. After completing a prototype run both you and your supplier will have a clearer picture of what a high volume run will look like in terms of lead time, price, and potential component stock issues.
  6. Doing multiple prototype runs allows you to experiment with different designs and components, thus allowing you to also reduce the cost of your project if that is your aim.
  7. A prototype PCBA can be used as a proof of concept and to test various theories that can lead to an improved and more efficient production PCB design.

Prototype PCB assembly

Prototype PCB assembly

What is a Stencil?

Stencils are specially made in accordance with the requirements of the board on which the components are going to be mounted.

Usually, the stencil is made from a sheet of hard material (aluminum, copper, or mylar). In most cases, there are two ways to make a stencil: make it yourself or order it from a specialized company.

Buying a Custom Stencil

In the process of buying any fairly serious production equipment for making stencils within the company, it often comes to the expert decision.

It is best to use the services of a specialized prototype PCB assembly company to create the stencil that you need.

The advantages of a custom stencil from a specialized manufacturer are:

  • Quality
  • Speed of manufacture
  • The possibility of repeated orders

In addition to using various materials, stencils are available in two basic classes: frame and mock-up.

Frame stencils are built on the basis of a special type of mounting hardware (frame) for attaching the stencil to the equipment for applying solder paste.

Dummy stencils are not mounted on the frame.

Instead, the three edges of the stencil are usually bent at right angles, creating a notch for the solder paste, stiffening the stencil, and allowing the operator to work with it.

The dummy stencils are optimized for working with board prototypes. Model stencils have the following properties:

  • Availability
  • Actually have the same quality as the production stencils
  • They can be made quickly
  • Compactness
  • Ease of use
  • Are used once and are recyclable

When is a Stencil Economically Viable?

It is possible that the Prototype PCB assembly company that assembles the boards is the best fit for you.

Or maybe your project is so simple (for example, all components with pins are used).

It is best to take a soldering iron and manually unsolder a huge number of components.

How do You Find the Optimal Solution?

The easiest way to use layout stencils is in the following cases.

  • A significant number of surface mount components are available.
  • Multiple changes are expected, but at this stage, the final layout of the components is accepted
  • It is necessary to simplify the soldering process (with high quality).

Let’s consider how you can improve the technological route using a stencil.

Estimating the time it takes for prototype PCB assembly by hand soldering, we get a pickup/placement/soldering time of 2min 20s per component.

This is on average. It takes less time for passive components. And much longer for large discrete components or connectors.

But if you consider the stage of filling the pads with solder, placing the component using tweezers, and soldering the leads, then 2:20 per component looks quite real.

Since the technician prepares and solders each component individually, the preparation and reflow time is included in the average estimated time for each component.
A different picture appears when using a soldering stencil for soldering.

Unlike manual soldering, when using a stencil, the technician quickly applies a thin layer of solder paste to the entire board.

The time required for the application of the paste becomes fixed, i.e. the application time for a large and complex board is the same for a more compact and simple board.

Let’s assume that it takes 2 min 30 s to apply solder paste to the board using a stencil.

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