World-Class CPU PCB Manufacturer in China

PCBMAY – Your Reliable CPU PCB Manufacturer in China

Our well-maintained manufacturing plant in China is fully equipped to handle your orders. With over ten years of practice, we believe we have perfected the craft of CPU PCB manufacture.
We are very accommodating — we customize products in order to fit your specific needs.
We are proud of providing excellent CPU PCB products, covering the following applications:

• Computer PCB
• Motherboard PCB
• Medical PCB
• Mobile Phone PCB
• Industrial Control PCB

We are the experts in manufacturing CPU PCBs. This is proven by our numerous certifications which have met well-respected standards such as ISO-9001, and quality system certifications from the USA and Canada UL(E477880).

We are a good PCB manufacturer, with over 500 workers. We train our people to be strict with safety standards. This is a must in the competitive CPU PCB industry.

In addition to these, in order to ensure we are giving you satisfaction, we offer free CPU PCB samples before committing to a large-scale order. You can trust us to provide you with CPU PCB applications, whatever line of business you are in.

We value the need for a clean and orderly manufacturing plant. As well, we are watchful of environmental, safety, and health standards. Rest assured that we fulfill the strictest global requirement for environmental safety.

Lastly, our salespeople handle customers professionally. We adjust to customer needs according to their local time.

To guarantee that you are getting your money’s worth, we update you with the status of your CPU PCB order in real-time. Because we value your time, your orders will arrive at the time you expect them to.

If you’ve got any questions regarding our rigorous standards, plant safety, and product quality, we gladly answer your queries.

You can reach us through our dedicated 24/7 customer service hotline.

Contact us immediately for your orders!

CPU PCB: The Ultimate FAQ Guide

You might have a CPU in many electronics you use. For example, CPU PCB is used in your smartphone, computer, and devices like those. Your computer keyboard, monitor, printer, everywhere you will have microcontrollers (CPU) that use CPU PCBs.

If you are looking for a way to know about CPU PCBs, you landed in the right place. Here we have collected various knowledgeable questions about CPU PCB and are going to clear them to you.

Let’s move to the point.

What Is CPU PCB?

PCB or the printed circuit board is the base of electrical components used to power up and conduct the workability of the electronics.

It is mainly made of an electrically conductive material such as copper, which is etched to conduct the current flow. The base block is made of different non-conductive materials such as prepreg, TEFLON, etc.

A CPU PCB

A CPU PCB is a printed circuit board that holds the computerized device’s controllers or central processing unit-CPU. The PCBs also include modular PC cards, peripheral component interconnect-PCI, industry-standard architecture. The genre extends with PCI extension for instrumentation card- PXI, and the embedded technology extended-ETX.

How To Design A CPU PCB?

There are some fundamental differences between typical PCB designing and CPU PCB board designing. You will have to follow some extra steps to complete a PCB design. Here you will see how to design a CPU PCB with multilayer boards.

Choose The Component Mounting Technology

There are two types of component mounting technology you will find: through-hole and surface mounting. The components could be positioned through the surface mounting process by an automated machine.

Through-hole allows you to place the components by drilling the base of the PCB. So, you determine which method would be preferable for the particular design.

Determine The Microcontroller

The central part of the CPU PCB is the microcontroller. Choose a suitable microcontroller for the proper purposes. Consider the overclocking speed and performance of the microcontroller.

Choose The USB To Serial Converter

The CPU will need to interface with the computerized system to operate the performance. An external chip is needed here to assist the translation to the automated system through a USB port.

The signal can be accessed on the microcontroller using serial communications peripherals such as the UART.

Choose The Analog To Digital Peripherals

The right analog to digital signal converter is essential to convert your analog signals into digital and enhance usability. Determine which one you will use.

Analog To Digital Signal Converter Module

Design The Circuit

Design the circuit by drawing the schematic design of the board. The schematic is the visual of the CPU PCB, which shows how the PCB will be. Schematic is the blueprint of your PCB.

Check here how to design your microcontroller board:

Design The CPU PCB Layout

PCB layout is the most crucial part of PCB designing. The layout design is impacted by choosing the characteristics of the analog signals. Ground plane also should be considered to design the layout of the PCB.

Analog signal traces must be kept away from the high-speed digital traces in the layout.

Order The PCB Stackup

The arrangement of the CPU PCB layers is essential for the performance, conductance. So, consider the following things during the PCB design.

• Number of the PCB layers
• Layer order
• Space among the layers
• Purpose of each layer
• The thickness of the layers, etc.

Choose The Right Components

Right components for the proper purposes are essential. The parts you selected should meet your requirement in terms of the intention to use your CPU PCB.

PCB Fabrication And Assembly

Now the CPU PCB board is ready to be fabricated and assembled. The thermal paste on PCB, such as solder mask, should be used to coat the PCB board.  Other PCB fabrications such as photoresist, surface finishes should be appropriately applied.

Assemble the right components in the right place of your PCB, and solder them if you choose the through-hole mounting. Also, SMT could be used as well to assemble the components correctly.

What Are CPU PCB Ground And Ground Technique?

PCB Ground

The grounding in the CPU PCB or electronics means the backup path track of the electric current that facilitates an alternative to the current flow back to the ground if any fault happens to the wiring or current conducting.

The active wire for the current flow provides the currents, and the neutral pathways safely send it back to the ground.

PCB Grounding

Floating ground, virtual ground, AC ground, Earth ground, and chassis ground are the different terminologies for the grounding in the PCB or electronics. Wrong use of grounding techniques could reduce the performance of the electronics or your PCB.

Different grounding techniques might be used for grounding a CPU PCB.  Following are among them.

I. Ground Plane

One of the most popular and widely utilized grounding techniques is the ground plane. This is done with a big piece of copper foil. The open regions of the PCB, which do not include any trace or component, are generally covered with copper by the CPU PCB makers.

The ground plane should be put on the base layer of a two-layer CPU PCB, while the parts and signal pathways should be on the top layer, as indicated by ordinary PCB ground plane rules.

II. Ground Plane Vias

On the off chance that the CPU PCB load up has a few ground planes, the ground planes would be connected employing discrete vias in different areas on the PCB. Vias are holes in the PCB that allow you to link the two sides together. This confirms that the ground planes on the PCB may be accessed from any part of the board.

III. Connector Grounds

All connectors connecting the circuit on the CPU PCBs should also be connected to the grounding. You should use ground pins to isolate the connections so that all signal conducts are parallel.

What Are The Materials Of A CPU PCB?

There are various materials used to form a CPU PCB.

Prepreg

Prepreg is a light fiberglass fabric that has been dealt with and relieved with epoxy resin. The prepreg is processed to make the CPU PCB utilizing a particular prepreg treater gear.

FR4 Epoxy Resin

The prepreg that is utilized to assemble a CPU PCB incorporates FR4 epoxy sap, Teflon, and polyamide. They start as a liquid condition and afterward cold and become firm.

Copper Clad Laminate

Prepreg is used with a copper-clad cover, which is compacted along with high tension and warm structure. Copper-clad turns into a plastic composite in the CPU PCB when the prepreg solidifies.

Copper Foil

To pass current flow via the CPU PCB, copper foil is utilized to etch copper traces. The copper traces are held in place by the outer or inner layer of the PCBs.

Solder Mask

The thermal paste on CPU PCBs is a solder mask, which protects them from oxidation and corrosion. Because the external circuitry of the boards is left unprotected, they should be covered with thermal paste.

Silkscreen

Silkscreen is a kind of white ink used to recognize the areas of the CPU PCB. It shows what parts will be put in which regions on the bind veil layer utilizing white letters.

The color of the silkscreen might be different, though.

Surface Finish

Surface finishes are the ultimate layer of protection for CPU PCBs against corrosion and oxidation. Surface finish coating might be used to protect copper holes and pads on PCBs. Surface finishes are applied using various metals such as gold, nickel, silver, tins, etc.

How Do Thermal Characteristics Impact The CPU PCB?

FR4 is the most used prepreg, which has a dense relation with the thermal characteristics. The thermal factors of the CPU PCB mainly impact the flexible material on it. See the following to check how the thermal state of the CPU PCB impacts.

Mainly thermal properties are divided into four parts. And they separately impact the PCB.

I. Glass Transition Temperature

The CPU PCB substrate gets soft at a specific temperature. The substrate returns to its normal state when the temperature is removed from it. This temperature is known as the glass transition temperature (Tg).

Glass Transition Temperature Effect On PCB Material

The range of the glass transition temperature should be under 200° C to 250° C.

II. Decomposition Temperature

The CPU PCB substrate loses 5% of its mass when exposed to the decomposition temperature (Td). Td has a permanent impact on the CPU PCB, but Tg has a transient effect. As a result, the Td range should be more than 250° C.

III. Coefficient Of Thermal Expansion

The expansion of the CPU PCB substrate is known as the coefficient of thermal expansion (CTE) when it goes under the Td. Usually, the CTE ranges between 10 to 20 parts per million (ppm). Up to 70 ppm is a safe expansion for the board substrate.

IV. Thermal Conductivity

The thermal conductivity(k) is in the form of the ability of a PCB to conduct heat through it. The higher the k-level, the better is the performance and thermal conductivity. The copper has the best thermal conductivity of 386 W/mK.

This range is far better than the typical dielectric constant, which generally ranges 0.3 to 6 W/mK.

What Are The Top Microcontrollers That Are Used In CPU PCB?

The significant features of microcontrollers are they compact the size and cost of the chips by using microprocessor, memory, and input-output devices in a single place. As the performance gets raised with cost-efficiency, the use of IoT is becoming handy day by day.

Here we show the top 5 microcontrollers that are primarily used in modern electronics.

I. ATMEGA328P-AU

• 32 pin TQFP along with 8-channel 10-bit analog to digital converter
• 32KB ISP flash memory
• 1024B EEPROM
• 2K SRAM
• 23 general-purpose i/o lines
• 32 general-purpose working registers
• Serial programmable USART, three adaptable timers

ATMEGA328P-AU Microcontroller

II.  ATMEGA328P-PU

• 6-channel 10-bit analog to digital converter
• 32KB ISP flash memory
• 1024B EEPROM
• 2K SRAM
• 23 general-purpose i/o lines
• 32 general-purpose working registers
• Serial programmable USART, three adaptable timers

III. ATMEGA2560-16AU

• 8-bit based low-power CMOS
• AVR enhanced architecture
• 1MIPS per MHz

Which Factors Should You Be Considering Choosing Microcontrollers?

The size of the microcontroller, speed, power utilization, streak memory, vital peripherals, costs, and environment support is, for the most part, factors that planners consider to choose a microcontroller. Most of the current realities here are affected by design needs.

To put it another way, the expense of a microcontroller is relative to its size. Subsequently, the planners just select as much as is required. The application’s objective dictates the fringe to utilize. Also, because speed and force productivity is often compromised, planners ought to return to their particulars.

PIC32MX250F128B Microcontroller

As far as force utilization and which peripherals and hinders are dynamic versus not dynamic, low-power modes are ideal. Regarding the size of the flash, planners should remember that as flash size increases, the pin count and the cost are also increased.

What Is The Solder Mask And Its Functions On A CPU PCB?

When you finish the fabrication of a CPU PCB, the copper traces on the PCB remain at risk of oxidation and corrosion. This happens due to exposure of the board to the environment. To protect the board from this type of destruction, a protecting coating is used. This coating is known as the solder mask.

Solder mask is a liquid photo imageable layer on the top and bottom surface of the PCBs. The main jobs of the solder mask are:

• To protect the CPU PCB from oxidation and corrosion
• Increase the lifespan of the board
• Creating shorts during soldering so that the solder bridge cannot be formed

Applying Solder Mask On PCB

You will find four types of solder masks:

1. Epoxy Liquid Solder Masks
2. Top And Bottom Side Solder Masks
3. Liquid Photoimageable Solder Mask
4. Dry Film Photoimageable Solder Mask

What Are The Types Of CPU PCB?

Different types of CPU PCBs are made in terms of rigidity and layers.

1. Single-Sided PCB

The single-sided PCB is the most common CPU PCB. It is made up of a single copper conductive layer. On one side, components are inserted, while the etched traces are visible on the other.

2. Double-Sided PCB

The double-sided PCB has a copper layer on both sides. Vias are utilized to link the board’s metal components. Both through-hole and surface mount technologies can be used to install components on a double-sided PCB.

3. Multilayer PCB

A multilayer printed circuit board is made up of at least three conducting layers. Multilayer PCBs are made up of several double-sided PCBs sandwiched together.

4. Rigid PCB

PCBs that are rigid cannot be folded or twisted. The boards are made on a robust substrate that prevents the PCB from bending and keeps it sturdy.

Rigid CPU PCB

5. Flexible PCB

Flexible PCBs are composed of bendable, adaptable materials. A flexible PCB is often made of polyamide PEEK or transparent conductive film.

6. Rigid-Flex PCB

Rigid-Flex PCBs are a hybrid of rigid and flex PCBs designed for specific applications. The PCBs’ flex regions are utilized to link the rigid boards and keep the circuit size small.

What Is The Electrical Property Of CPU PCB Material?

The ability to flow electric current is the electric property of the CPU PCB. Electric properties are different.

1. Dielectric Constant (DK) and Relative Permittivity (Er): They impact the CPU PCB’s signal integrity and impedance. To ensure frequent signal uniformity, keep DK at a consistent value.

Dielectric Properties On PCB

1. Volume Resistivity, ��� (Ω/m2): The volume resistance of a dielectric is measured by it. To ensure isolation between layers, keep it as high as possible.

• Surface Resistivity (ρS): Surface resistivity (S) obstructs a dielectric material’s surface to protect and power.

1. Electrical Strength: It describes the CPU PCB’s capacity to withstand z-direction failure.

In Which Sectors CPU PCBs Are Used?

CPU PCB modules are used in data transport, audio and video operations, and integrated devices. The communications and control system includes PXI cards that enable the necessary real-time measuring application.

Microcontroller PCB Used In Automobiles

ETX cards are used to augment computer-embedded systems in industrial applications. ETX cards come with all of the functionality required to run a computer in a tiny space.

The CPU PCB is also employed in:

• Toys, cameras, washing machines like consumer electronics
• Instrumental process control such as multimeter, Oscilloscopes, etc.
• Medical devices such as ECG, Accu-chek, etc.
• Automobiles such as speedometer, pilot control, etc.

What Are Controlled Impedance And Its Importance In A CPU PCB?

The coordination of capacitance and inductance during a high-recurrence signal is known as impedance.

During the high-recurrence signal travel employing the copper follows, the controlled impedance guarantees impeccable recurrence. This ensures that there is no signal misfortune, bending, or recurrence debasement.

The matching impedance is the only way to get the highest signal power. On the other hand, more caution should be exercised when it comes to high-frequency signals. Otherwise, it may be twisted and damaged. Unexpected failures also could have happened.

Why Are Vias Used In A CPU PCB?

Vias are the drilled holes in a multilayer PCB. They are used to join the layers of multilayer PCBs together. The connections made through the vias allow the CPU PCBs to be kept small.

Spot copper pads on each layer of the PCB and drill an opening through them to make a by vai. Electroplating or putting copper chambers directly in the penetrated holes makes the opening conductive.

Vias On PCB

The non-conductive substance is utilized to cover the vias’ inner sides. Copper plating is used on the outside of the vias to make them conductive. And this outer layer links the CPU PCB’s layers.

How To Control The Quality Of CPU PCB?

You should follow the following step to keep the quality of your CPU PCB standard.

• Check that the CPU PCB maker is IPC guaranteed for PCB production.
• Foster very much established procedure ranges to guarantee the nature of CPU PCBs.
• Must appropriately adjust each crucial element. Determine that the fastening activity is done securely.
• Collect the PCBs with care. Utilizing a robotized technique is desired.
• To ensure that the PCBs are working, utilize an assortment of testing methodology. ICT, X-ray, Flying-test, AOI, and other testing techniques are accessible for some sorts of testing.

X-ray Inspection On PCB

• The maker should ensure a very much planned and super-advanced specific workplace.

What Are The Components Used In A CPU PCB?

In a CPU PCB, you will see the following most common components:

• Microcontroller
• Diodes
• Transistors
• Transformers
• Capacitors
• Resistors
• Inductors

Different Types Of Components For PCB

• Silicon-controlled Rectifier
• Potentiometers
• Oscillators
• Sensor
• Switch and Relays

Here, different components are explained for a CPU PCB:

What Are The Design And Layout Considerations Of CPU PCB?

To obtain a quality design and result in a quality CPU PCB, you must consider some vital facts and assemble the PCB during the procedure.

• Select proper and quality material for the CPU PCB
• Components selection should be authentic
• Determine the component placing method before designing the board
• Keep short the high-frequency traces
• Facilitate ground plane with high-frequency signals
• Keep separate the analog and digital circuitry
• Try to avoid the auto-routing
• Think about the proper coating for the board
• Don’t drill the vias under the components
• Keep the via hole size as small as possible

How To Prevent Corrosion In CPU PCB?

Corrosion is the process of oxidation on the metal of the PCB, especially on the copper, when oxygen bonds with the metal. It produces rust and causes loss of the chemical properties of the metal. CPU PCBs are made of copper and other metal, so corrosion happens to them.

Galvanic and electrolytic corrosion are the two most common electrochemical corrosion processes. When there is an ionic contamination or electrolyte solution in two different metals, as well as an electrical contact, galvanic corrosion happens.

Electrolytic corrosion happens when an ionic liquid or electrolytic solution contaminates nearby traces.

Flux corrosion is another type of corrosion. Corrosion of copper traces and holes is caused by flux residue left over during soldering.

Surface Coating On PCB

Corrosion prevention isn’t as difficult as you would imagine. Applying a radiative protective layer to the exposed areas of copper and other metals is all it takes. Corrosion solutions include solder mask covering, epoxy lamination, and aerosol spray. Surface finishes would also be the optimum covering to keep the outside copper regions from corroding.

Who Are The Quality CPU PCB Manufacturers?

There is no one word saying that you could say that only one manufacturer in the world is the best. You will find several standard features on the quality CPU PCB manufacturers. Based on the quality, you could consider each one of the best.

A good CPU PCB manufacturer would hold the following features, which could help you to recognize them.

• They are experienced in the industry
• They provide extraordinary customer services
• Facilitate standard working space and use modern technology
• Able to meet the deadline
• Have bulk production ability at a time
• Ensure the precise quality PCB

You could select a manufacturer for your CPU PCB production if you get such features on them.

Last Words

If you wish to make your CPU PCBs, designing and manufacturing them will be a little more complicated. Also, if you’re a retailer looking for a large quantity of CPU PCBs, you’ll need to get them from a reputable PCB manufacturer.

PCBMay is a prominent CPU PCB maker with extensive PCB manufacturing expertise in the market. You might think of us as a PCB factory for your CPU. We deliver the most outstanding services while ensuring that the highest quality standards are met.