What are the advantages of White PCB?
1.It is should be provide a bright light as compared to the other color of printed circuit board.
2.It gives steady to the electrical circuits
3.It doesn’t lead any inconvenience during the assembly and installation
4.It can ttake a large number of elements on the printed circuit board
5.It offer a compatible and convenient manufacturing proceed as compared to the other PCBs
6.Almost all critical components are normally soldered on the base of the circuit
7.It helps to convenient transfer the electricity throughout the circuit.
What are the Disadvantages of White PCB?
1.They are more expensive to manufacture as compared to the other color types of printed circuit board.
2.They need excessive labor during their proceed and installation.
3. They need difficult cleaning procedures.
4.Sometimes they provide a difficulty with the several surface finishes.
5.The plating and soldering of white-colored printed circuit board need good care.
6.They don’t handle the most delicate details on the circuit board.
Does the Color of the White PCB circuit Matter?
The color of the white PCB doesn’t have a directly impact on its properties and working efficiencies.
However, the meaning color of the printed circuit board is because the presence of different solder masks on the board. So, it will give a different visual impact for each color of the PCB.
The PCB color comes with a correlation for connecting the electronic components to the circuit.
The visual access of the PCB is directly related to the color of it solder mask.
Venture is a professional manufacturer of innovative color PCB in China. We are a supplier of different color PCB throughout the world.
Some common colors for PCB we offer are white PCB, green PCB, black PCB, yellow PCB, orange PCB, purple PCB, and many more.
We are capable of manufacturing a wide array of white PCB through our advanced technology and expert designers.
Your Leading White PCB Supplier in China
Venture is more than 10 years in supplying quality white PCB to different industries around the world. If you are looking for a reliable and trustworthy manufacturer for white PCB, Venture is the right place for you.
Venture white PCB or white solder masks cannot resolve small features unlike the way blue, red, or even green solder masks do. Because it has very high pigment involved with creating a white LPI solder mask.
To achieve a bright white solder mask that resists yellowing, you must use large quantities of special white pigments formulation.
Venture is an expert in manufacturing white PCB that commonly used in LED PCB applications with metalcore. Our white PCB provides more brightness of LED systems.
Venture white PCB is the lease preferred PCB color. Because their components are not seen clearly compared to all other colors. This white PCB is least clear.
Venture is the best manufacturer of PCB with different colors ranging from blue, green, white, red, black, yellow, and many more.
As a leading color PCB provider in China, we can manufacture a high-quality white PCB for your project.
Along with our highly trained designers and engineers, Venture is capable of manufacturing a wide array of white PCB.
Small or large quantities of white PCB order is always welcome at Venture.
If you have any questions about our white PCB, please don’t hesitate to contact us right away!
White PCB: The Ultimate FAQ Guide
In this guide, you will find all information you’re looking for about white PCB.
So, if you want to learn more about these color PCBs, read this guide.
- What is White PCB?
- How does Rigid-Flex and Flex White PCB Compare?
- Which are the Important Electrical Properties of White PCB?
- What are the Advantages of White PCB Material with Low Dielectric Constant?
- How does the Time to Delamination and Peel Strength of White PCB Compare?
- Which are the Main White PCB Materials used to Fabricate Metal Core PCBs (MCPCBs)?
- What is the Recommended Coefficient of Thermal Expansion (CTE) of White PCB?
- How do you Test the Flexural Strength of White PCB?
- When do I need to Panelize my White PCB?
- What are the Advantages of Multilayer White PCB?
- How do you Select the Best Substrate and Copper Foil for High-Frequency White PCB?
- Which are the Categories of White PCB Solder According to IPC-SM-840?
- What factors Determine the Choice of Thickness and Type of Solder Mask for White PCB?
- How do you Apply White Solder Mask on PCB?
- What is the Recommended White PCB Solder Mask Clearance?
- How do you Avoid Solder Mask Relief Problems during White PCB Fabrication?
- What are the Applications of White PCB?
- What is the Main Disadvantage of White PCB?
- Which are the White PCB Assembly Techniques?
- What are the Advantages of SMT Assembly of White PCB?
- Which are the Main Source of Signal Loss on White PCB Trace?
- What are the Information Provided by Silkscreen of White PCB?
- Why is Liquid Photo Imaging the Best White PCB Silkscreen Printing method?
- How do you Perform Silkscreen Printing on White PCB?
- Which are the Recommended Font Size, Line Width, and Clearance Values for the Best White PCB Silkscreen Result?
- What is the Difference Between ENEPIG and ENEPAG Surface Finish for White PCB?
- Which are the Quality Tests for White PCB?
- How do you Perform White PCB Inspection during Manufacturing?
- Which Requirements should an Impedance Controlled White PCB Meet?
- What are the Requirements for Auto White PCB Assembly?
What is White PCB?
This circuit board is built to supplement the electric components with mechanical support and incorporates a white solder mask.
Also, you will use high-density white pigment formulations to make a white PCB solder mask. This allows the white PCB to maintain its white color without yellowing.
Because white PCB emits greater light than other colors of the PCB, it is appropriate for usage in LED systems.
How does Rigid-Flex and Flex White PCB Compare?
Here is how the two types of white PCB compare:
Flex White PCB
With this PCB, you can fit the circuitry in electronic devices or core products. Besides, as a manufacturer, you do not need to design a casing around the PCB as the board can adapt to the current design easily.
This is advantageous when producing hardware or components with complex designs. For example, traditional boards might be unacceptable if you are concerned about the overall weight, mobility, and durability of a given product.
Sometimes flexible PCBs need to be adjusted to the restrictions of a product. It may be necessary to minimize board size and shift circuits or rebuild them to fulfill the standards of casing and dimensions.
All circuits are put in a separate design, including the components. Then you will highlight it by using a malleable base substance, like copper.
Some of the areas that you will use this PCB include medical fields, smartphones, computers, and automotive electronics.
Here are some pros and cons of a flex white PCB:
- They are reliable and excellent since they lack mechanical connectors.
- Besides, they are expensive than rigid-flex white PCB.
- They have a low resistance to temperature than rigid-flex white PCB.
- Also, they are completely flexible.
- They can fit on any design and weigh less than rigid-flex white PCB.
- Also, you can use them in applications that exert rapid movements and a lot of stress.
Besides, it is suitable that you use this kind of PCB in areas that need the following:
- Wiring solutions that will fit in areas that rigid-flex PCB will not fit.
- Durable, lightweight, and thin products.
- Miniature systems.
- Three-dimensional packaging geometry
- Few devices inter-connects
- Vibration and shock resistance.
Rigid-Flex White PCB
This PCB uses both flexible and rigid circuitry systems and contains several layers. Depending on the production needs, they have extra conductive layers that can have rigid or flexible insulation systems.
The outer layers have pads and covers for safety purposes. Also, you will use conductors for the main rigid layer.
Flexible plated through-holes are for any extra layers, whether rigid or flexible. Some of its applications include industrial PCB and medical wearable.
Here are some pros and cons of rigid-flex PCB:
- They are reliable since they have fewer solder joints.
- Price is lower than that of flexible white PCB.
- They also have an excellent temperature resistance than that of flex white PCB.
- Besides, you can use it in applications that have more than average stress and movements.
- It will last long since they have fewer interconnections and parts.
- Also, it is easy to maintain.
- They weigh more than flex white PCB.
Which are the Important Electrical Properties of White PCB?
Dielectric Constant (Dk) or Relative Permittivity (Er)
An impedance and signal integrity are two of the most essential aspects determining the electrical performance of a dielectric constant.
In general, between 3.5 and 5.5 is the dielectric constant (Er) of a white PCB material.
The degree of Er of a substance will normally decrease with an increase in frequency. In particular PCB materials, the DK level fluctuates less than in others.
A consistent dielectric constant is vital for the safety of high-frequency applications. Also, it should be constant throughout a wide range of frequencies.
White Solder Mask PCB
Dielectric Loss Tangent (Tan δ) or Dissipation Factor (Df)
If the loss tangent is low, a material loses less power. The dielectric loss tangent (Tan δ) of white PCB materials is usually between 0.02 and 0.001.
The first value is for the materials that you will widely use and the second value applies mainly to high-end materials.
Tan δ will also increase with the frequency and the loss tangent is often a small concern for digital circuits. Any application where the frequency level surpasses 1GHz would cover expectations for this rule.
For analog signals, the loss tangent is more critical.
Volume Resistivity (ρ)
This is the resistance of the dielectric material to electric current or insulation. A white PCB material that has a high resistivity seldom facilitates electric charges.
Also, you will use ohm-meters (Ω-m) and ohm-centimeters (Ω-cm) to measure the resistivity of a specific dielectric.
The material on a white PCB, like other dielectric insulators, should be very resistive, preferably between 103 and 1010 Megaohm centimeters. External elements such as heat, cold, and humidity can affect the resistivity of a material.
Surface Resistivity (ρS)
This is the surface resistance of dielectric materials to electrical currents and insulation. Surface resistivity needs to be high, suitably in the range of 103 to 109 megaohms per square.
Moisture and extreme temperature fluctuations can impact surface resistivity.
This is the ability of the dielectric material to offer resistance against electrical breakdown across the Z-path of white PCB. Its unit of measurement is volts/mil.
The electricity strength of most white PCB materials is between 800 V/mil to 1500 V/mil.
What are the Advantages of White PCB Material with Low Dielectric Constant?
Longer Length Mismatch
The parallel nets in the signal bus must have the lengths matching. This will guarantee that signals will arrive simultaneously at the destination components.
Simply put, this means that all parallel traces on the bus must have their lengths as close as possible. The length or time difference is the allowed skew that is between parallel high-speed nets within a bus.
When you know the time difference, the speed of the signal and the difference in time is proportional to the allowed length. Low dielectric constant white PCB has greater signal speeds thus also has a larger allowed length mismatch.
Less Capacitive Coupling
Between the traces and vias, the strength of the capacitive coupling is dependent on the dielectric constant of white PCB substrate materials. Low dielectric constant white PCB has a smaller capacitance between the neighboring conductors.
This in turn means the strength will be lower for the capacitive crosstalk.
Also, when the dielectric constant is less, you can place the conductors close to one another. This is possible for specific allowed strength for crosstalk signals.
Besides, the strength of these capacitive crosstalks will lessen for some vias, traces, or conductor spacing.
Longer Critical Length Transmission Line
Here, you will compare the rise time for the digital signals or oscillation duration for the analog signals with propagation delay. After comparing these, you will quantify the crucial length of the interconnect.
However, this does not offer the best way for you to determine the critical length. The easiest way involves evaluating differences between the input impedance of the transmission line and the impedance of the source line.
How does the Time to Delamination and Peel Strength of White PCB Compare?
Here is how they compare:
Time to Delamination
This is the duration it takes a dielectric material to resist delaminate-causing effects. It will determine the time it takes for the layers of the white PCB to be undone.
This happens when you expose it to extreme temperatures above a specific threshold. Besides, a white PCB material can also delaminate when you expose it to humidity or thermal shock.
This is the ability of the copper layers and dielectric layers in white PCB to bond. Here, you will test the peel strength on a one-ounce thick trace of copper in the following conditions:
- After thermal stress
- In high temperatures
- After chemical exposure
Which are the Main White PCB Materials used to Fabricate Metal Core PCBs (MCPCBs)?
These materials are:
This is a cost-effective material that has a suitable capacity to eliminate and transfer heat.
This material is rigid than aluminum or copper. Besides, it has lower thermal conductivity than these two.
It is expensive but offers a great performance than aluminum.
What is the Recommended Coefficient of Thermal Expansion (CTE) of White PCB?
It is 70 ppm or below.
How do you Test the Flexural Strength of White PCB?
This is the ability of the dielectric substance not to break when you expose it to physical stress. The SI unit is kilograms per square meter [kg/m2] or pounds per square inch [lbf/in2].
To conduct the test, you will support the ends and apply strength at the center of the white PCB.
When do I need to Panelize my White PCB?
Paneling is necessary when your white PCB dimensions are lower than 50mm x 100mm or when it is irregular. Irregular white PCBs are those that are not rectangular and have odd shapes.
If the white PCB will make use of surface mounting equipment during assembly, it is vital to conduct panelization.
Panelized White PCB
What are the Advantages of Multilayer White PCB?
The main advantage of multilayer white PCB is their sizes. Due to their layered design, they are smaller than other PCBs that tend to offer the same functionality.
This benefits modern technology as the trend is to make them smaller yet powerful.
This white PCB eliminates the need to use several connectors to interlink it which is common in single and double-layers PCB. It proves favorable in modern electronics since they need to be more mobile.
They have the best quality since it undergoes several steps during its manufacture. This makes them have a higher quality than single-layer white PCB. Also, this makes them more reliable.
By their nature, white multilayer PCBs are usually strong. They must be able to bear the heat and pressure that binds them, and their weight as a whole.
Also, between the circuit layers, they will make use of several insulation layers. This binds them with protective substances and a prepreg bonding agent.
While this does not apply to all multilayer white PCB assemblies, some employ flexible manufacturing techniques which make the PCB flexible. This is useful in an application that might experience bending and flexing may happen irregularly.
Also, the more layers are in a white PCB, the less flexible it becomes.
They are high-density packages that have several single white PCBs. These tight quarters permit the PCB to become more connective.
Also, their inherent electrical characteristics allow them to attain more speed and capacity despite the small size.
Single Connection Point
Instead of working together with other PCB components, multi-layer white PCBs will function as a single unit. This means they have one connection point in contrast to several connection points for several single-layer white PCBs.
Also, this will benefit electronic product designs since the final product will have one connection point. It is advantageous to small gadget designs to reduce weight and size.
How do you Select the Best Substrate and Copper Foil for High-Frequency White PCB?
Different materials such as epoxy and glass fibers are within the substrate of a white PCB.
To manufacture high-frequency circuits, a substrate needs to have a low dielectric constant. For copper foils, ensure you select the one that will lower resistance.
Which are the Categories of White PCB Solder According to IPC-SM-840?
T – Telecommunication
It incorporates telecommunication systems, laptops, computers, and systems you will use in non-critical military usages.
H – high Reliability/Military
This covers equipment where downtime is unacceptable and progressive performance is vital.
FT – Flexible Printed Board Applications (Telecommunications)
It covers materials that you will use for flexible boards in telecommunication gadgets.
FH – Flexible Printed Board Applications (High Reliability/Military)
It covers materials for flexible white PCB usages for military applications requiring high reliability.
What factors Determine the Choice of Thickness and Type of Solder Mask for White PCB?
This depends on the width of copper traces on the white PCB.
How do you Apply White Solder Mask on PCB?
The process involves the following steps:
Cleaning the Board
Here, you will clean and dry the board to eliminate dirt and contaminants.
In this phase, you will load the board on a vertical coater to apply the white solder mask ink. The thickness of the coating depends on factors like the reliability and application of the white PCB.
Also, the thickness of the solder mask depends on the different sections of the PCB such as copper foil, traces, or substrate.
Here, you will make the coating to be relatively solid on the PCB. It assists in eliminating extra coating in the developing stage.
Imaging and Hardening
Here, you will use a photo film that is laser plotted to illustrate the solder mask region. Also, you will align the film to the panel that has the dry ink coating.
Besides, you will expose the film on the panel to UV. The UV light moves through the film on the opaque regions thus hardening the ink below it.
In this stage, you will submerge the PCB under a developer to clean the extra solder mask. This will ensure an accurate exposure of the copper coil.
Hardening and Cleaning
This is the final stage that makes available the solder mask ink when you mount it on the surface of the PCB. Then, you will clean the board before other processing such as the application of surface finish.
What is the Recommended White PCB Solder Mask Clearance?
The clearance of the solder mask should be half the widths of the conductor spacing.
How do you Avoid Solder Mask Relief Problems during White PCB Fabrication?
By maintaining the relief at the standard 2-mil boundary of your design.
What are the Applications of White PCB?
They are common in LED systems as they offer the brightest solutions than the other colors.
Of course, depending on your application requirements, you can also deploy them in other uses.
Application of White PCB
What is the Main Disadvantage of White PCB?
It offers the least visibility and some low-quality masks turn yellow when you expose them to heat.
Which are the White PCB Assembly Techniques?
When it comes to white PCB assembly, you can use either:
What are the Advantages of SMT Assembly of White PCB?
Some of the benefits include:
- They are time efficient as it needs you to drill fewer holes on the white PCB.
- It is cost-effective.
- SMT uses smaller parts that offer higher density per unit area.
- Also, you can place the assembly on both sides of the PCB.
- It is easy to rectify small errors automatically.
- They offer better mechanical performance in low resistance and vibration environments.
Which are the Main Source of Signal Loss on White PCB Trace?
In most cases, the signal loss in white PCB maybe due to the following reasons:
- Dielectric losses
- Resistive heating within traces
What are the Information Provided by Silkscreen of White PCB?
In your white PCB silkscreen, you should provide the following information:
- Reference designators
- Component symbols
- Pin markings
- Special markings
Why is Liquid Photo Imaging the Best White PCB Silkscreen Printing method?
It is because you will use epoxy to coat the laminate, expose it to UV light, then cure and develop it which offers better accuracy.
How do you Perform Silkscreen Printing on White PCB?
It involves the following steps:
- Begin by making a negative soldering film
- Proceed to punch the position holes for the negative film
- Clean the surface
- Configure the printing ink
- Then print both sides of the white PCB
- Preheat, expose, then develop the board
- Hot set
Which are the Recommended Font Size, Line Width, and Clearance Values for the Best White PCB Silkscreen Result?
Use a font size of 0.050-inches and do not go below 0.035 inches. The line width should not be smaller than 0.006-inches.
Also, the clearance should be at least 0.005 inches from the PCB pads.
White PCB Silkscreen
What is the Difference Between ENEPIG and ENEPAG Surface Finish for White PCB?
In ENEPIG, you will deposit gold on the surface during an exchange reaction. This reaction produces thickness levels that vary on different pad sizes making it hard to conduct gold wore bonding.
ENEPAG process reduces the gold deposit thus delivers a homogeneous gold layer state making it good for gold wire bonding.
Which are the Quality Tests for White PCB?
You can conduct any of the following quality tests when verifying performance of white PCB:
- Flying probe
- In-circuit Testing [ICT]
- Functional testing like board level, system level, circuit board, sub-level assembly, and cables and harness.
- Burn-in test
How do you Perform White PCB Inspection during Manufacturing?
Inspection will assist in the early detection and rectification of errors during manufacturing.
These processes include:
- Automated Optical Inspection [AOI]
This will ensure the accuracy of missing components, soldering, and placement of components.
- X-Ray Inspection [3D and 2D]
It offers accurate visual verification against insufficient fills, voids, and shorts.
Which Requirements should an Impedance Controlled White PCB Meet?
Some of the most important requirements include:
- Definition of prepregs and base materials.
- Impedance adjustment to the layer assembly.
- Signal routing compliance with impedance methods.
- Marking of signal tracks.
- Assigned reference planes.
- Determining tolerance and nominal values of impedance.
What are the Requirements for Auto White PCB Assembly?
- Glue dot file
- Solder paste file
- Design database
- Parts list
- Part centroid text files that contain Reference Designators
- Numerical control drill file
- Gerbers in 274-X plus fabrication drawings
At Venture Electronics, we will help you get high quality and reliable white PCBs.
Contact us today for all your white PCB needs.