Your Expert Large PCB Manufacturer in China

Your Original Large PCB Supplier

PCBMay is a highly recommended manufacturer and supplier of Large PCB. We are a reputable company in this PCBs industry. We obtain a rich experience, and that experience enables us to deliver our products with confidence.

Its unique feature allows us to build up to 24 inches of PCB with almost any PCB material type.

We offer a wide selection of Large PCB like Mother Board PCB Circuit Board, Home Electronic Dishwasher PCB, Large-Sized PCB Assembly, Custom Good Quality PCB Assembly, Two-Sided PCB Mother Board Scale, and many more.

PCBMay, a professional Large PCB manufacturer, is genuinely trusted supplier when you use it. PCBMay Large PCB has passed quality inspection to ensure the best work in your PCBs production line.

We are your excellent answer for your Large PCB materials. We keep prioritizing professional services and manufacturing high-quality products. Subjected to lifetime support and assistance for your Large PCB businesses and projects.

We can provide you an excellent Large PCB with the best design and best capacity. PCBMay can supply you Large PCB that is suited and perfect for your business. We always strive to meet your project’s Large PCB requirements.

And addition, We also offer installation and operator training to ensure the proper use of every piece of Large PCB and other types of PCBs. We are the perfect solution for any PCB needs.

PCBMay is a professional Large PCB Assembly. Get the best and high-quality types of PCB at PCBMay services.

Please feel free to contact us for more information, orders about our Large PCB. Send your inquiry Now!

Large PCB: Ultimate FAQ Guide

Large PCBs are something we don’t see very often on our electronic devices. With each large PCB, there is a specific function.

Large PCBs are subjected to a time-consuming procedure. This is why it is critical to work with a big, reputable PCB maker such as PCBMay, who can deliver high-quality large PCBs in a short period.

What Is A Large PCB?

A circuit board with a width of over 12 inches is regarded as a Large PCB. It goes without saying that when you draw up a plan 20 inches wide via whatever length, you are working on a giant board.

The limits of mechanical surface mount technology have reached a width of 30 inches or more. Anything must be taken into consideration if broader than this and other production techniques. Another thing to remember is the number of layers in your design.

Large PCB

A Large PCB is often utilized fiber like a backplane, which necessitates using many layers. Furthermore, these boards usually have many connections and broad power and ground surfaces, among other characteristics.

What Are The Large PCB Features?

Large PCBs are used in specific situations because of their unique characteristics. Manufacturers often use large PCBs because of their distinct advantages over standard PCBs. Large PCBs  have a number of features, including:

Enhanced reliability

The Large PCB is ensured to function reliably for a long time by a range of inspections, testing, and aging tests.

Great designability

The criteria for different characteristics (electrical, mechanical, chemical, physical) of PCB can be met via standardization and normalization of design, which can be completed in a short amount of time and with excellent efficiency.

Great productivity

Using contemporary management techniques, it is possible to carry out standardization, scale-up, automation, and other aspects of production while maintaining consistency in product quality.

Easy testing analysis

The manufacturer undertook the development of a reasonably comprehensive trial method, test standard, and various test equipment and instruments to verify and evaluate the quality and life of the Large PCB product.

Capability for assembly

PCB products enable standardized assembly of different components, but the parts can also be automated and bulk manufactured. Manufacturers can simultaneously build PCBs and other elements into more extensive modules, platforms, and entire machines.

Great maintenance

As PCB goods and components are combined into standardized, developed, and produced pieces, they are likewise standardized. When the system fails, the system may be rapidly, quickly, and flexibly changed.

PCB Maintenance

What Are The Large PCB Applications?

Every electrical device makes use of PCBs. Large PCBs are utilized in large projects or goods. This kind of PCB is not used in consumer electronics. Instead, it is used in a variety of sectors, including the automobile and aerospace industries. We will look at some of the applications for Large PCB in this section:

Industrial Application

The equipment in industries must be durable, heat resistant, and capable of high performance. As a result, Large PCB is an excellent use for it.

Industrial Equipment

Electric drills, electric conveyor belts, electric presses, cranes, hooters, and cutters

Power Equipment

DC-AC inverters, Servo Motor Driver, Power controller, and PLC.

Automotive Applications

Electric cars have become more prevalent in recent years. Electronics are used in the automotive industry. To function, they must utilize large PCBs.

Safety and Detection

The newest vehicles have sophisticated electronics that utilize lenses and radar systems to identify objects nearby and prevent collisions. This safety mechanism works with high-end PCBs.

Navaids

Many vehicles now have GPS trackers for safety. Many businesses need this when selling new cars to consumers.

Audio/Visual Devices

Advanced decks in modern vehicles utilize audio equipment, including FM radio loudspeaker driver circuitry and USB players. Similarly, tiny LCD video gadgets to listen to music or monitor the situation behind the vehicle for safety.

Aerospace Applications

Aircraft Large PCB

Aerospace encompasses anything that can fly & reach the upper atmosphere. Aircraft, drones, quadcopters, fighter aircraft, rockets, satellites, and spacecraft, among other things, fall under this category.

The machine’s designs must include a high degree of accuracy and long-term endurance. As a result, the electronics connected with them must be durable and reliable while also functioning correctly.

Aircraft

One example is the use of accelerometers and gyroscopes in precise positioning and guidance systems for rockets and missiles, tracking and control premised on thermal imaging, pressure gauge, temperature probe, moisture sensor, height sensor, torque, as well as force sensors, and other electronic devices such as these.

Satellite Control

Magnetic sensors, Gyroscopes, and response wheels, and Solar Panel deployment electronics are all examples of electrical devices.

What Are The Different Types Of Large PCB?

Large PCBs are often categorized according to the frequency they operate at, the number of layers they include, and the substrate they are made of. Some of the more common kinds are described further below.

Single-Sided PCB

Single-sided PCBs are the most common circuit board since they include just one layer of substrates or base material.

Double-Sided PCB

Unlike single-sided PCBs, double-sided PCBs contain metal conducting layers on both surfaces of the substrate.

Double-Sided PCB

Multi-layer PCB

Multi-layer PCBs are circuit boards containing over two copper layers, such as 4L, 6L, 8L, and so on.

Flexible PCB

Flexible PCBs are built on an elastic base material.

High-Frequency PCB

High-frequency PCBs are utilized in the frequency band of 500MHz to 2GHz.

Rigid PCB

Typically, rigid printed circuit boards whose base substance is made of solid material and thus cannot be bent.

What Is The Standard Dimension Of A Large PCB?

Large PCBs are created for each gadget and project. To accommodate this, they need various sizes and proportions. For a large PCB, it is not possible to take a base dimension. Instead, you can design your own that is tailored to your own device’s needs.

Because the typical Large PCB substrate panels measure 19.7” by 31.5”, this is the theoretical highest dimension for a single PCB if we utilize the whole board like a substrate.

PCB Sizes

What Are The Considerations While Designing A Large PCB?

Because of the vast quantity of factors in Large PCB design, if you are not acquainted with the terms and concepts. It will be described in detail at this step how your PCB will look, how it will work, how it will contain the components, where it’ll be placed in your device, and its overall size.

Schematic documentation

A proper design approach begins with detailed diagrams. Questions about the board’s physical arrangement often emerge during manufacturing. A clean diagram may save time by showing the intended circuit flow. Include as little detail as feasible on the layout schematic, like trace length, part placement requirements, board housing details, etc.

PCB Schematic Documentation

Added eyes

Often the designer and engineer of the circuit are not the same. In such situations, the PCB layout specialist should contact the original designer to verify the layout fulfills the design requirements. Cooperation at this point can save time & expense in the production of PCBs that work as planned and perform as expected.

Component location

For board functioning, essential components, including power sources and input/output ports, should be specified. Another part arrangement can also degrade PCB performance, such as arranging circuits so that the physical proximity doesn’t affect one another’s functioning.

Power supply

Large circuits need power supply routing to reduce “noise.” Standard techniques like rails-to-ground or rails-to-rail may be successful.

Parasitics

Parasitic capacitance, or stray capacitance, may cause problems in large circuits. Knowing the cause of such capacitance and preventing circuit instability or oscillations is critical for large PCB design. Parasitic concerns on PCB design include ground plane use and packaging.

Routing/shielding

Circuitry with high-speed signals may cause signal interference on boards. PCB designers should prepare appropriately to prevent signal route conflicts using various techniques.

Materials

The materials used in board manufacturing help reduce noise levels and crosstalk. Dielectric properties vary across materials, and dielectric loss constants result in faster displacement.

Trace construction

The usage of microstrip traces can also affect signal quality. Trace length, depth, and material capacitance all have a role. Its impedance, inductance, and capacitance influence the signal route’s efficiency and possible noise separation.

How To Manufacture A Large PCB?

Due to all necessary design details and data, the PCB maker will build the input board. There may be many various circuit boards, including single-sided PCBs, multi-layer layouts, and flexible circuits. In this instance, we examine the basic procedures to manufacture an additional circuit board.

Making a Circuit Design

The initial step in producing circuits is to transform digital pictures from PCB design databases to boards. One of two methods is used to transfer picture data to the board.

The standard imaging technique for PCB manufacturing since mass production began. A photoplotter can generate precise film circuit pictures that are used to guide screen printing.

Circuit Board Layering

Co-circuit boards have multiple layers of dielectric and copper conductors. Other insulators, such as FR-4, are used as well. FR-4 is a carbon dielectric main composition sandwiched between copper foil layers.

Inner Layer of Large PCB

The first step is to create circuit pictures on the inner cores of PCBs:

A film foil protects a copper plate in the center. Patches and streaks in the copper circuit show the picture resistor.  The copper is chemically removed from its unprotected etching.  After this, the core sheets are inspected for defects using AOI.

Drilling Holes:

Multiple holes or passive elements should be boiled through the PCB during the manufacturing process. They serve various functions. Installing modules with holes is a certainty. Another is aligning the adjunct faculty layers. This is crucial for multi-layer PCBs.

Drilling Holes In PCB

Silk-Screening

Soldering and depthless fiber layer are the last two steps of PCB manufacturing. A solder mask is put over the Large PCB to prevent corrosion of the copper to guarantee proper soldering. The panel has names, figures, symbols, component IDs, and other word elements written in silk.

Bare-board test

“Tracksuit bottoms” as well as “available” are typically ticked on blank plates. This is called electric PCB testing. The connection between two locations should never be short. They lack an open connection between subjects.  The CAM device instructs the electrical testing to provide a voltage to every contact point and confirm that voltage.

Assembly

The device pipes are inserted through slots, and the holes hold the elements in place. The piece is surface mounted on the PCB, with edges aligned with the pads or on the PCBs borders. The solder pad initially holds the modules in place until the surface-mounting parts are bonded to the PCB on both sides.

The connections are soldered using a hole and a substratum mount; after they are cooled and strengthened, the soldering holds the modules safe in place and connects them electromagnetically to the frame.

This video will give you a better understanding of the PCB manufacturing process

What Are The Issues When Fabricating Large PCB?

The manufacturing of a Large PCB will provide unique challenges that a standard PCB will not contend with. Here are some of the areas where a broad board may have an impact.

High-layer fabrication

Long PCB producers can be qualified for CM layer counts based on manufacturing capabilities. Specific abilities range from 2 to 4 levels, 6 to 10 layers, and 12 and above. Larger layer counts need more specialized suppliers, slowing PCB manufacturing.

Quick Response PCB

High-speed layout, voltage control, copper density, and copper widths for traces will slow down sheet manufacturing.

Additional Charges

Plates support PCBs. When you own a panel, the more PCBs you produce, the cheaper each PCB becomes. Since large boards don’t fit into standard sizes, you pay a fixed fraction per unit.

Multiple Connectors

The test mount must contact all adapter objectives to thoroughly test and verify the large PCB fabrication and assembly processes. With so much electrical wiring in the background, it will take longer to test.

Thermal impact

Heating and cooling solder joint procedures may be influenced by irrigation and electricity planning. More copper on the chassis means more heating and corrosion. This may prolong the adjustment of the connection heat treatment profile.

Thermal Impact On Large PCB

What Is The Standard Thickness Of A Large PCB?

Many variables influence the functioning of a PCB during manufacture. One is the PCB thickness. Your PCB’s thickness will affect its conductance and resistance; therefore, you must select the right thickness for your application. This section will explain the different PCB thickness regulations and how to choose the right one for you.

PCB Thickness

Layer count affects total PCB thickness. The combined core and prepreg’s average thickness range is between 0.008-0.240 inches.

Standard PCB Thickness

The usual depth is 0.063 inches (1.57mm). This is because 0.063-inch plywood sheets are utilized as substrates in electrical equipment.

PCB Thickness

Copper Thickness

The PCB’s current typically determines the copper thickness. Internal copper layers generally are 1.4-2.8 mm thick and 2-3 oz.

PCB Trace thickness

The designer typically specifies PCB trace thickness. The copper traces may overheat and destroy the PCB as the current flow rises.

What Are The Components Mounted On Large PCB?

A Large PCB’s parts are assembled to power our gadgets. To get you started, here are ten typical electrical components placed on PCBs! Once you look at them, the concept of having many distinct elements in a PCB doesn’t appear to be so alien anymore.

PCB Components

• Resistors
• Capacitors
• Inductors
• Transformers
• Transistors
• Diodes
• Integrated Circuits
• Switches and Relays
• Sensors
• Oscillators

What Are The Assembly Standards Of Large PCB?

IPC-A-610 is one of the most frequently utilized industrial standards in the production of large circuit boards. This standard covers the handling of electronic assemblies, appropriate hardware installation techniques, acceptable soldering outcomes, and many other elements of producing surface mount.

Assembly Standards Of PCB

Other IPC assembly requirements your manufacturer should use in creating your Large PCB include:

IPC-A-600—Printed boards acceptability. This specification is used to examine bare PCBs arriving from a PCB manufacturer.

IPC/WHMA-A-620C—Cable and Wire Harness Assembly. Your manufacturer uses this to make cables for your PCB assembly.

IPC-A-630—Acceptability Standard for Electronic Enclosure Manufacturing, Inspection, and Testing

IPC 7711/7721C—Electronic Assemblies Rework, Adjustment, and Repair

Although several additional IPC standards apply to the assembly PCB, these are the most important ones which your manufacturer should utilize to guarantee the success of your boards.

What Are The Large PCB Assembly Process Step By Step?

The assembly procedure of a large PCB can be complicated since numerous variables are needed. In PCBMay, we have the finest large PCB assembly equipment and the expert to supervise the whole process.

Here you can use the assembling procedure for your large PCB.

SMT Paste Screening Solder

The first stage is the application of the solder paste in the bare PCBs in the PCB assembly process.

Machine Placement

After applying solder paste to the base PCBs, they are transferred to automated Pick & Place equipment for component installation.

Pick And Place Machine

Reflow Soldering

With firmly installed components with solder paste below the pads, the PCBs must undergo the reflow soldering stage.

X-Ray Inspection

X-Ray Inspection will take place with any boards comprising BGA, QFN, or other leadless packaging types.

Wave Soldering

Wave soldering is a PCB assembly technique that includes transmitting panels on a conveyor by use of a “wave” of molten solder.

Manual Soldering

Manual soldering is usually employed when a PCB design includes sections not suited for reflow or wave welding.

Last inspection

Inspections should be carried out with each step of the Large PCB assembly to help locate the cause of any problem

What Are Types of The Large PCB Packaging Process?

Large PCB packaging has to protect PCBs from high heat, physical damage, and more. The packaging does not safeguard the components against high temperatures but protects against electrostatic discharges (ESD) that are essential.

Bubble wrap

This is likely the most minimal packaging you will see unless you are sending bare PCBs. This is acceptable for elementary, sturdy boards, but you want to bump them up if you have sensitive components.

ESD Bags

Many ESD-sensitive parts on circuit boards and bulkier hardware are transported inside ESD bags. They are bright, silver, and typically feature a Ziploc-style closure.

Moisture barrier

If your Large PCBs are sensitive to moisture (mainly at a certain level) or are transported by sea freight in a wet environment, look for water-resistant packaging.

PCB Moisture Packaging

Vacuum sealed

You can suck all air out of the packing surrounding your PCB for the hard-core moisture-sensitive circuit board applications.

How To Specify Control Impedance In Large PCB?

The impedance control of your large PCB increases the operation of your board. Initially, you need to understand the factors that may influence impedance control.

Trace Width

The trace width of a Large PCB is equivalent to the width and coating of a copper foil.

PCB Trace Width

Copper Thickness

The thickness of copper influences the impedance. If the thickness of copper rises, the impedance decreases.

Dielectric Thickness

The dielectric depths that of the insulating substance that separates the track from the circuit board.

Dielectric Constant

A PCB’s dielectric constant tends to vary with frequencies inversely. The Large PCB is excellent for higher frequency and lower power impedance.

What Are The Testing And Inspection Methods Of A Large PCB?

Assembly testing of PCBs is a crucial component of the manufacturing process. Though manufacturers employ different methods. Typical Large PCB testing and inspection techniques include:

In-circuit Testing

This is presently the most effective PCB assembly testing method. This testing is typically done on stronger connections. This test includes the use of fixed probes that are set out in a manner that corresponds to the PCB design.

The probes inspect the solder connection to ensure that it is in good working order. It takes just a few simple presses of the board against the bed of needles to begin the test on the nail bed.

PCB In-Circuit Testing

Automated Optical Inspection (AOI)

One or more 2D or 3D cameras are used to image the Large PCB. The software then compares your board’s photos to the board’s designs. Whenever a board does not conform to the design to a particular extent, the board is highlighted for examination by a technical staff member.

It is possible to utilize AOI to identify problems early on and shut down production as soon as possible. Unfortunately, it does not provide power to the panel and may not provide 100 percent coverage for all component types in all situations.

X-ray Inspection

This testing is called AXI. This is a comprehensive inspection tool, not a testing device.

Flying Probe Testing

Flying probe testing uses needles attached to a probe placed on an x-y matrix created using basic CAD. This video will provide you with a more in-depth understanding of PCB testing and inspection.

How To Choose The Right Large PCB Manufacturer?

When looking for a manufacturer to construct your prototype, make sure they can create big circuit boards. Before choosing a manufacturer, find out:

Manufacturing processes

Find out whether the manufacturer can manage problems like big board thermals and if their manufacturing methods are flexible enough to meet these requirements.

Large PCB Manufacturing

Testing capabilities

Another problem is how many connections can be tested and if the capabilities of manufacturers can thoroughly test your giant board.

Fabrication vendors

The manufacturer you select should also have connections with PCB manufacturing companies that can rapidly produce big PCBs.

Finally, when designing big PCB prototype boards, you need a manufacturer who understands the difficulties and concerns of manufacturing larger panels. With the proper knowledge and skills, your prototype has the most excellent chance of success.

Conclusion

Large PCBs are utilized in a variety of significant applications and gadgets. As a result, it should be meticulously manufactured and assembled to exacting standards. Due to their size and usage, Large PCBs can be challenging to manufacture.

PCBMay is China’s best Large PCB manufacturer. If you do have any questions regarding Large PCB, please contact us.