Rigid-flex PCB Prototype

  • High-quality
  • Flexible
  • Cost-effective
  • Considerate customer-service

Application of Rigid-Flex PCB

1.Industrial application
Industrial application is includes rigid-flex PCB used in the industry, military, medical. Most industrial parts demands the characteristics of accuracy, safety, and resistance to soil destroy.However, because the high complexity of the process, the output is small and the unit price is very high.

2.Mobile phones
The application of rigid-flex PCB is in mobile phones, such as folding mobile phone hinges, camera modules, keypads, and radio frequency modules, are common.

Application of Rigid-Flex PCB
Common structures

Common structures of Rigid-flex PCB

The rigid flex board is to give one or more rigid layers on the flexible board. The circuit on the rigid and flexible connected through metallization.

Each rigid-flex board has one or more rigid area and a flexible zone The combination of one flexible board and several rigid boards

Design Suggestions of Rigid-flex PCB

Rigid flex PCB board is a product that promotes technical level and application field of flexible circuit boards to help system products move to a broader space. Not only can the product be more miniaturized, but also it can solve many problems in assembly.

Structural considerations are the one of most critical factor in the design of Rigid-flex. It is essential to make the process simple, highly reliable, achieve low cost and application.

Design Suggestions

Venture is one of the leading manufacturers of Rigid-flex PCB Prototypes. We have more than 10 years of experience in manufacturing Rigid-flex PCB Prototypes in China.

As a result of our experience in manufacturing, we are known as a reliable, trusted, and expert manufacturer of Rigid-flex PCB Prototypes.

We offer various sizes of high-quality Rigid-flex PCB Prototypes of different layers with cost-effective prices.

We can also design rigid-flex PCB prototypes according to your specifications.


Your Leading Rigid-flex PCB Prototype Supplier in China

Venture is manufacturing and supplying Rigid-flex PCB Prototypes to the customers globally. We deliver them in the fastest and safest way.

Our goal is to provide high-quality Rigid-flex PCB Prototypes for our beloved customers. We guarantee you its durability and quality.

Rigid-flex PCB is one of the most popular types of circuit boards.

We are offering double-sided circuits, multi-layer rigid, as well as flex circuit assemblies. We can also produce the PCBs to have 3-dimensional connections. Also, we provide different colors of rigid-flex PCB prototypes depending on your needs.

Rigid-flex PCB Prototypes are boards that is a combination of a flexible and rigid board that is integrated together into one circuit. The two-in-one circuit is interconnected.

Venture rigid-flex PCB prototypes is applicable for consumer electronics, industrial controls, medical, military, optoelectronics, semiconductor, testing and measurements, wireless networks, and etc.

Rigid-flex PCB provides better quality control and higher component density. The circuitry of the rigid-flex PCB is consists of multiple flexible circuit inner layers.

Find a trusted supplier of rigid-flex PCB prototypes and choose Venture. We can manufacture rigid-flex PCB prototypes depending on your specifications.

To send your design, please contact us.

Rigid Flex PCB Prototype: The Ultimate FAQs Guide


This guide has all the relevant information you need to know about Rigid-Flex PCB Prototype process.

Whether you want to learn about the cost, classification criteria, trace width, choosing substrate materials, or evaluating properties, you will find all information right here.

So, keep reading to learn more.

What Is A Rigid-Flex PCB Prototype?

It is a PCB prototype that is widely used in the market to test several physical designs.

This is prior to practical manufacturing with less cost incorporation to access any issues related.

Rigid Flex PCB Prototype

Rigid Flex PCB Prototype

The rigid portion of the rigid-flex PCB prototype houses:

  • Signal Traces
  • Power Circuits
  • Power Entry Plane
  • Large Components (Capacitors, Wires, Connectors)
  • Thick Pads (greater than .060 Inches).

The flexible portion of the rigid-flex PCB prototype has leadless components, or connected copper pours on the top surface.

This method is a very common way to create prototypes for complex custom PCBs.

You can customize PCBs with tight space constraints, high-reliability requirements, or when cost-effectiveness is required overproduction.

Why Invest In Rigid-Flex PCB Prototype?

The reasons why you invest in Rigid-Flex PCB Prototype are listed below:

Whether design engineers carefully plan your rigid-flex PCB, there are always small mistakes and problems that can cause their work to fail.

In most cases, your engineers use a PCB prototype to test the functionality of PCB-based solutions.

You do not always know what exactly needs to be corrected in a product.

You can discover this truth much earlier in the process by using the Rigid-Flex PCB prototype.

Rigid Flex PCB prototype provides you with an opportunity to save extra cost on amateur practical design.

Which Are The Different Types Of Rigid-Flex PCB Prototypes?

There are different types of Rigid-Flex PCBs which include:

Visual Models

Visual Model Rigid-Flex PCB Prototype helps you design and interactively demonstrate your new electronic products.

The visual model is the best way to explain the idea behind the concept visually.

You can use this prototype to present your design to potential investors or customers.

It plays an integral role in the early stages of the rigid flex PCB design work.

Proof-of-Concept Prototypes

This is a physical model of the assembly that you can create to verify the space requirements long before building a costly prototype.

You can use Proof-of-Concept Rigid-Flex PCB Prototype for design verification, testing of digital electronic and analog electronic devices and circuits.

Working Prototype

You can assemble working prototypes to meet a customer’s specific design requirements.

So the end PCB product will showcase final product features and functionality.

You can test the prototype for design functions and determine whether it can be made successfully into a final product.

This flexible electronic assembly technique eliminates costly delays from engineering changes, enabling faster time to market for your products

Functional Prototype

You can use Functional Rigid-Flex PCB Prototype for short-run production, and manufacturers can also source this type for a cost-effective PCB prototype.

It can fit different components fine, especially those with fine pitch, loaded fine and small parts such as IC chips, resistors, and capacitors.

What Are The Advantages Of a Rigid-Flex PCB Prototype?

There are many advantages of the Rigid-Flex PCB Prototype. Some of the major benefits are listed below:

Reliable and Precise:

A good prototype is a way to ensure you that the final product design will work properly.

A prototype with functional testing ensures that design and functionality are upfront and correct when making the final product.

Assists During Manufacturing:

Design flaws, inefficiencies, and a host of other issues can creep into the design process. It’s important to ask the right questions during review to ensure that your designs are flawless before they’re put into production.

Individual Testing of Components:

When developing large projects, thorough unit testing is a great way to identify where problems might occur. By testing each piece of code separately, you can quickly locate faulty sections.


PCB prototypes save you money. They help you catch mistakes earlier on in the design process, and they can be reused for any future production runs.

Time-competitive Completion of Projects:

Pro-technologies like PCB prototyping enable your design team to spot the problems with your product before you even create it.

Without it, your project could be delayed for months as your design team discovers the problems with the prototype and fixes them.

How Does Rigid PCB Prototype Compare To Rigid-Flex PCB Prototype?

Before deciding which type will be the best option for your product, it’s important to understand how these competing materials compare.

Rigid PCB Prototype

Rigid PCB Prototype

Rigid PCBs are the most common types of printed circuit board. They have been the industry standard for decades.

They use pads and strips of conductive material to a non – conductive material to provide a connection between various electrical components.

In general, the non-conductive material has a layer of glass on it to give the board added strength. This glass also provides thermal insulation between the circuitry and the board, protecting the components from extreme temperature changes.

Some of the key differences between Rigid PCB Prototype vs. Rigid-Flex PCB Prototype are listed below:

  • Rigid-Flex PCBs are produced by rigid-masking a flexible PCB. However, there are times when a flexible PCB is designed with a coverlay technique.This gives the exposed circuitry of the flexible PCB a protective mask to prevent moisture, dust, and other contaminants from sticking to it.
  • Unlike rigid printed circuit boards, a flexible printed circuit board can often bend. To achieve greater flexibility, rolled annealed copper is used instead of electro-deposited copper.
  • Rigid circuit boards will inevitably be cheaper compared to flexible circuit boards.But when the need arises to create something extremely small or in tight spaces, flexible circuit boards are best for your needs.

Which Are The Steps Involved In Rigid-Flex PCB Prototyping Process?

The steps involved in manufacturing of Rigid-Flex PCB Prototype are listed below:

  • The initial step to creating boards starts with material selection. First, it is important to choose the type of board that best suits your needs.Cleaning is also necessary for this step to ensure that the board can be used for further processing.
  • Next step in Rigid-Flex PCB Prototype manufacturing produces the desired circuit pattern by following two techniques, including photo imaging and screen printing.
  • After the circuit pattern is generated, it is etched (or etched together) with an etching process.Next, a rigid-flex material is applied to a copper laminate containing the circuit pattern. To achieve the desired results, the laminate and material are simultaneously etched.
  • Now, it’s time to drill the correct number of holes and vias in the board. For highly accurate drilling, ultra-small holes can be created with high-speed tools.For smaller holes, rigid-flex circuit boards are manufactured with lasers. The most commonly used lasers are Excimer YAG lasers and CO2 lasers.
  • This is a crucial step in the process of manufacturing rigid-flex PCB.After holes are drilled in a precise manner and plated with copper, layers of copper are deposited on top, creating an electrical interconnection.
  • Protective coatings are applied to circuits to protect from the elements.In many cases, a polyimide film is used with an adhesive to cover the surface. This is then laminated overusing screen printing techniques.
  • Trimming individual flex boards that are not in the exact place they should be during production.Often, manufacturers of rigid-flex PCBs will choose to do the work manually with a punch tool.But for manufacturing on a large scale, employ hydraulic punching to speed up the process.
  • The final step in the production of circuit boards is testing.This is necessary to ensure that all features and circuits meet the required specifications.The boards undergo electrical testing in several different ways. Most commonly, they are tested with grid probes and flying probes.

What Types Of Adhesives Do You Use In The Fabrication Of A Rigid-Flex PCB Prototype?

Adhesives used in the fabrication of Rigid-Flex PCB Prototype are listed below:

Polyamide Adhesive:

When choosing a thermal transfer material, it is important to look at its durability and temperature–resistance.

Polyamide Adhesive

Polyamide Adhesive

Polyimide is a great choice for this job because it is resistant to extreme heat, has a low coefficient of thermal expansion. Moreover, you can useit for multi-layer circuit production.

Polyester Adhesive:

This is a low-cost polyester adhesive used for making rigid-flex PCBs.

Polyester Adhesive

Polyester Adhesive

While the material is inexpensive, it is extremely brittle and cannot bear high temperatures or sudden fluctuations. Today’s manufacturers have switched to altered polyester adhesives, which are more robust and less likely to fail.

Acrylic Adhesive:

These adhesives are a great choice for all sorts of applications.

Acrylic Adhesive

Acrylic Adhesive

They have excellent heat resistance, exceptional chemical strength, and easy to use. They’re not the most expensive choice, but they are readily available in most retail stores.


The flexible nature of epoxy resin makes it perfect for general-purpose adhesives, construction materials, and protective coatings.

Epoxy Resin

Epoxy Resin

Today’s epoxies are also safe to handle and are resistant to solvents and other chemicals.

Protective Films:

The protective films on rigid-flex PCBs are carefully chosen to provide the most effective protection for your product.

Protective Films

Protective Films

We recommend that you avoid extremely corrosive liquids, aerosol sprays, and other dust- or dirt-prone environments for best results.

Which Are The Vias Drilling Technology Applied In Rigid-Flex PCB Prototype Manufacturing?

There are many different ways to create vias however, they all have one thing in common.

They will be drilled through the outer layers of PCB assembly and then soldered to make a conductive connection between the two layers.


Vias Drilling

Vias Drilling

Vias are used to create connections from one layer of material to another. They are typically created by using a laser drill or via plating.

Mechanical drilling is another technology that plays its part in vias drilling.

Xray locator can be utilized in vias drilling to locate excat hole locations on PCB prototype. You also need a computer to do the drills, this will aid in doing the task precisely and speedily.

What Is The Recommended Thru-Hole Plating Thickness In Rigid-Flex PCB Prototype?

Thinner plating is recommended for through-hole construction on rigid-flex PCBs.

Thru Hole Plating Thickness

Thru Hole Plating Thickness

he minimum thickness to increase mechanical support of the laminate, whereas satisfactory results can be obtained with ½ mil metallization.

When selecting a plating thickness in a rigid-flex PCB prototype, factors to consider include the outermost layers, flexible design, and assembly costs.

Is There A Standard Aspect Ratio For Holes/Vias Of Rigid-Flex PCB Prototype?

There is no specific standard aspect ratio for vias or holes, but it depends on the application and design rules of the circuit board.

The standard aspect ratio for a hole/ vias can be 15:1. This ratio helps to minimize the problem of stress concentrators in high-frequency designs.

Vias are the holes that are placed in the PCB to aid in joining layers. They can be designed to assist in pattern flow or allow for space between connections.

Many vias are located on rigid-flex PCBs to make insulating material sandwiched between the layers for more flexibility.

Why Does Rigid-Flex PCB Prototype Have Longer Lead Times Than Rigid PCB?

The reasons for these relatively longer lead times for rigid-flex pcbs are:

  • When prototyping rigid-flex PCBs, the amount of time it takes to bake the board is days or sometimes even weeks.Add this together with the amount of time required for the board to cure and dry fully. This is in addition to weeks of bad manufacturing time.
  • The lead time to produce prototypes varies greatly depending on the complexity and volume of the PCB design.Many designs with intricate design elements are more complicated to build and are therefore time-consuming for prototyping purposes. An example includes buried vias, and bookbinding takes 12 weeks together alone.
  • Performance of various elements in a Rigid-Flex PCB can be accessed, which incorporates additional lead time.

What Is The Thickness Of The Rigid-Flex PCB Prototype?

Another important thing to consider is how thick a Rigid-Flex PCB prototype is.

Several factors must be considered when determining how thick a Rigid-Flex PCB Prototype should be.

One of the most common mistakes in designing and fabricating prototypes underestimates the thickness needed to accommodate the components.

The thickness of a Rigid-Flex PCB prototype varies for each panel size, typically ranging from 0.4mm to 3.2mm.

This depends on the number of layers required and if Solder Mask needs to be applied.

Which Are The Key Considerations For Rigid-Flex PCB Prototyping?

The key considerations for Rigid-Flex PCB Prototype are listed below:

  • Learn about the different types of printed circuit boards and how to flex PCBs are different from rigid PCBs
  • Identify the best techniques that are used for making flexible PCBs
  • Find out which are the best PCB flex mounting techniques that are widely used in manufacturing.
  • As you plan your move, consider how many contact layers you’ll need and how they will be used.
  • As the temperature rises, the device may have problems. To protect your devices from extreme heat, take precautions to lower their surface temperatures.
  • Material selection has a direct impact on manufacturability, cost, and performance. Therefore, material selection should be prioritized when a design is being made.

What Are The Substrate Materials For Rigid-Flex PCB Prototype?

The performance of rigid-flexible PCBs depends on the flexible substrate they are printed on.

The most important PCB material used is the adhesive film and dielectric film of the substrate.

Substrate materials are listed below:

  • Polyester (Mylar)
  • Polyamide (Kapton)
  • Fluoropolymer (PTFE)
  • PET
  • Fiberglass

As for polyimides, the dielectric constant is the highest, and their mechanical and electrical properties are outstanding.

They’re also designed to be temperature resistant; besides, they are prone to moisture.

Polyimide is a material used in many applications.

Polyester, which is notorious for its higher temperature resistance.

PTFE is a polymer of tetrafluoroethylene that has a low constant of the dielectric.

Does The Rigid-Flex Circuit Board Type Leads To Difference In The Manufacturing Technology Of Rigid-Flex PCB Prototype?

Different types of flexible circuit boards (Kapton, PTFE, MYLAR) require different types of manufacturing technology.

Manufacturiing technologies that are widely used are listed below:

  • Fine circuit manufacturing technology
  • Microvia manufacturing technology

Manufacturing technologies based on board types include:

  • Flex Rigid PCB manufacturing technology
  • Embedded Flexible PCB manufacturing technology

Flex-rigid PCBs are manufactured by aligning and stacking rigid and flexible PCB sheets.

The alignment is achieved through careful placement of the flexible copper tracks on top of the rigid copper ones.

An embedded flexible PCB is a circuit board that is made from flexible material. It is then placed inside a rigid PCB, and then it undergoes an assembly process.

Not all interconnections are available between the equivalent layers of flexible and rigid circuit. They are not always possible because of blind vias or buried vias.

What Are The Key Properties To Consider During Selection Of Rigid-Flex PCB Prototype Materials?

The following properties of materials you need to consider while selecting fabric for your Rigid-Flex PCB Prototype:

  • Coefficient of Thermal Expansion
  • Glass Transition Temperature
  • Decompoaition Temperature
  • Time to Delamination

Coefficient Of Thermal Expansion

The CTE is used to determine the expansion of material upon heating.

An insufficient CTE can lead to failures during assembly, which could potentially cause serious damage to the product.

Glass Transition Temperature

The glass transition temperature is when the material transitions from a hard glass-like structure to a more flexible rubbery-like one.

Decompoaition Temperature

The temperature at which the laminate material decomposes is a measure of its reliability.

It is a critical design parameter, and can be an important factor in shelf life and safety.

The temperature below which the material will degrade to 5% of its original weight is a critical failure point.

Time To Delamination

There is a time when the epoxy layer of PCB will separate from the substrate.

The core of the PCB might be affected by the softening of the epoxy, and it will get deformed or even destroyed.

That could lead to some serious malfunction and failure.

Which Is The Recommended Copper Foil For The Conductive Material Of Rigid-Flex PCB Prototype?

There are two types of foils which are recommended for the Rigid Flex PCB prototype.

  • Electro Deposited Copper Foils
  • Rolled Copper Foil

You can choose from a variety of weights and thicknesses that you want to use for flex rigid pcb prototype.

These materials are highly valued for their high electrical conductivity and reliability.

What Is The Preferred Trace Width For Rigid-Flex PCB Prototype?

The preferred trace width for rigid-flex PCBs prototype is listed below in the table.

This is due to the material thickness of the substrate, which usually varies, and the polyimide laminate.

Sr. No.DescriptionPreferredStandard
1Trace Width (0.5 Oz Copper)5.0 or more3.0 to 4.0
2Trace Width (1.0 Oz Copper)8.0 or more5.0 to 7.0

Why Is Rolled Annealed Copper Foil Considered The Best Conductor Material For Rigid-Flex PCB Prototype?

The best conductor material for rigid-flex PCB prototypes is rolled annealed copper foil.

It is made by flattening out copper ribbons which are then processed to ensure electrically conductive.

Rolled Annealed Copper

Rolled Annealed Copper
They are always made with copper foil as the main conductor material as it is flexible and can withstand repeated bending without breaking.

Annealed rolled copper foil is used to make a rigid Flex PCB prototype because of its:

  • Flexibility
  • Structural Strength
  • Ease Of Fabrication And Processing
  • Mass Fabrication
  • Circuit Performance

What Is The Minimum Lead Time Of Rigid-Flex PCB Prototype?

The delivery time for a rigid-flex PCB prototype is generally four to six weeks.

The turn-around time may vary depending on the complexity of the design and volume needed, but lead time can be minimized by planning.

The reason for this relatively long lead time is several reasons. Some of these reasons include a lengthier baking cycle, time association with designing complex elements, and performance evaluation processes.

How Does Embedded Rigid-Flex PCB Prototype And Traditional Rigid-Flex PCB Prototype Compare?

The differences between embedded rigid-flex PCB prototype and traditional rigid-flex PCB prototype are described below:

Low-cost embedded flexible PCBs can be manufactured by affixing flexible circuits onto a rigid board compared to the traditional Rigid-Flex PCB Prototype.

The flexible circuit area is often much larger than the rigid-flex PCBs, allowing for more flexible substrates to be used at once.

Connecting plated through-hole to the rigid circuit in a single layer was not employed in the past.

Still, now advanced manufacturing techniques can be carried out by using in-layer connections.

The embedded flex PCBs can solve the many problems in the fabrication of rigid-flexible PCBs. The embedded units allow manufacturers to use less material and reduce waste, allowing them to increase their flexibility of use.

What Does Overlay Mean In Rigid-Flex PCB Prototyping Process?

For flexible circuits, the overlay is used as a solder resist. However, it has less flexibility than conventional solder masks.

Nevertheless, it provides adequate flexibility for flex-circuits that require greater bendability.



The copper structure is protected by gluing overlay.

Overlay, a type of protective film that covers components without blocking their function. It is used on the top and bottom of the circuit board to provide the maximum level of protection.

Which Are The Available Solder Mask Colors For Rigid-Flex PCB Prototype?

Solder mask colors for rigid-flex printed circuit boards are available in a wide variety of industry-standard colors.

They including green, red, blue, black, yellow, and white.

Solder Mask Colors

Solder Mask Colors

Different color options are useful for other applications.

PCBs that use copper can be soldered with any solder mask color. On the contrary, those that use a conductive adhesive may allow only specific color options.

What Are The Typical Applications Of Rigid-Flex PCB?

There are several different applications of Rigid-Flex PCB Prototype. Some of the applications are described below:

  • Microwave equipment
  • Instrumentation
  • Consumer manufacturing
  • Contract manufacturing
  • Aerospace
  • Automotive
  • Telecommunications
  • Radio communications
  • Medical electronics
  • Lighting
  • Power supplies
  • Instrumentation and controls

Can You Manufacture Multilayer Rigid-Flex PCB Prototypes?

Yes, it is possible to manufacture a multi-layer rigid-flex PCB prototype.

To manufacture multi-layered printed circuit boards, a layer of epoxy-infused fiberglass is laminated onto a conductive core.

Multilayer Rigid Flex PCB Prototype

Multilayer Rigid Flex PCB Prototype

The layers are then laminated in a hydraulic press at high pressures and temperatures. The joint is created by compressing different layers of material at varying temperatures until the layers fuse.

How Do You Specify Rigid-Flex PCB Prototype?

You can specify your Rigid-Flex PCB prototype by determining the following specifications:

Sr. No.FeaturesSpecifications
1MaterialsPolyamide, FR4, RF etc.
2Copper Thickness9, 12, 18, 35 µm
3Surface FinishOSP, plated Ni/ Au
4Minimum Line Spacing125/ 125 µm
5Stiffener MaterialSteel, Aluminum, FR4
6Annual ring150 µm
7Drill Aspect Ratio15:1
8Outer layer Drill to Copper8.0 Mil
9Inner Layer Drill to Copper10.0 Mil
10Minimum Solder mask100 µm
11Minimum Pitch0.5 mm
12Copper Thickness0.5 Oz – 4.0 Oz
13Copper to board edge0.007”
14Coverlay opening0.003”
15Minimum hole size0.004”
16Control depth drillingYes

Which Quality Certifications And Standards Should Rigid-Flex PCB Prototypes Adhere To?

The standards you must use in delivering Rigid-Flex PCB Prototype are listed below:

  • ISO 9001:2008 Certification
  • IPC – CC – 830B Compliant
  • IPC – WHMA – A – 610 Compliant
  • All assemblies are built to IPC – A – 610 – D & ANSI/J – STD – 001 standard

What Is The Rigid-Flex PCB Prototype Cost?

The cost of the Rigid-Flex PCB Prototype depends upon several factors.

These factors include:

  • Material
  • Number Of Layers
  • Board Type, Size
  • Quantity
  • Overlay
  • Hole Size
  • Silkscreen
  • Gold Finger
  • Stiffener
  • Surface Finish
  • Design Elements
  • Evaluation Process

The option exists to select your desired specifications depending on your needs. In general, the cost of Rigid-Flex PCB Prototype lies in the range of $500 to $1100 per piece.

How Do You Conduct Electrical Testing And Verification On The Final Rigid-Flex PCB Prototype?

The last stage in the production process for a rigid-flex PCB is to conduct rigorous electrical tests on the boards.

You need to make sure that your boards are fully functional and execute every last test to achieve an exceedingly high level of PCB quality.

To ensure reliable circuit performance, circuits must be tested with flying probe and grid tests. Flying probe testing methodologies are highly efficient and accurate techniques for testing integrated circuits with high quality and reliability.

In addition to verifying the PCB shape parameters, it also helps you to confirm the PCB reliability.

For example, suppose your product is related to the automotive industry.

In that case, the PCB should be verified for moisture and chemical properties like heat and shock

It is then tested for resonance, flex fatigue, and chemical deterioration.

Can You Design And Fabricate A Low-Cost Rigid-Flex PCB Prototype?

Yes, you can design and fabricate a low-cost Rigid-Flex PCB Prototype.

Several factors affect the cost of the Rigid-Flex PCB Prototype. It depends on the application and on the intended function that your Rigid-Flex PCB Prototype is low cost or not.

At Venture Electronics, we help you in all your rigid flex PCB fabrication process.

We work closely with your team ensuring you have the best rigid flex PCB.

Contact us today for all your rigid flex PCB prototype.

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