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HDI Rigid-Flex PCB

HDI Rigid-Flex PCB

HDI Rigid-Flex PCBs have blind and buried vias with a very thin 0.6mm rigid area thickness. This HDI Rigid-Flex PCBs are an not easy design, but with the help of advanced equipment and decades of manufacturing experience, we successfully manufacture this HDI Rigid-Flex PCBs with zero defect rate.


HDI Rigid-Flex PCB, also named as multilayer rigid-flex circuit with the advantages of both rigid and flexible pcb. And HDI Rigid-Flex PCBs have a higher interconnect or trace density than normal PCBs. This enables the use of smaller vias, microvias and advanced package techniques.


HDI rigid-flex circuit boards are made by bonding multilayers thin flexible circuit materials. The layers are first laminated together to form a single flex PCB. Adhesives are then used to bond the layers together. These resulting laminated boards are withstand high temperature and pressure to ensure a tight bond between the two rigid and flex layers.


HDI rigid-flex boards feature high circuit density, heat dissipation, and chemical resistance, so they are mainly used in a variety of electronic devices, including mobile phones, laptops, and tablets, but also in medical equipment, military equipment, and the aerospace industry.

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HDI Rigid-Flex PCB Stackup

The rigid-flex PCB structure uses blind and buried holes, that is, HDI rigid-flex circuit. HDI rigid-flex circuit boards are typically driven by high-density BGA applications requiring vias in pads. This type of construction may also require an asymmetric construction if the blind vias need to be interconnected to the flex circuit layer. 


2F+6R+2F HDIRigid-Flex PCB Stackup


This is a 10 layers rigid-flex board with HDI blind and buried via design. And HDI rigid -flex board adopts the first-order HDI+VOP process. After laser blind vias, need to be plated and filled, and the resin plugging process must meet the requirements of product design signal stability. Please see the first-order HDI rigid-flex board stackup.



This stackup is built for a 10-layer Rigid-Flex board, mainly for artificial intelligence products. This first-order HDI rigid-flex board stackup shows all layer thicknesses and drill hole locations. The FPC part has buried vias, and the rigid part has blind holes.


2R+2F+2R HDIRigid-Flex PCB Stackup

Rigid-flex board adopts HDI technology, its design flexibility, reliability and wiring efficiency are significantly improved. Please see the bellow2R+2F+2R HDI Rigid-Flex PCB Stackup.



This is a 2+ HDI rigid-flex circuit stackup, and its structure is 2R+2F+2R, that is combined with 2 Rigid layers, 2 flex layers and 2 rigid layers. And this HDI rigid-flex pcb has buried vias, blind vias.  

The HDI rigid-flex pcb has a blind via from L1 to L2 and a buried via from L2 to L5. Finally, there is a blind via at the bottom from L6 to L5. This 6 layers HDI rigid-flex circuit is a symmetrical structure in which the flexible layer is located in the center of the material stackup.


2R+2F+2R Every layer interconnection (ELIC) HDI Rigid-flexPCB Stackup


As multilayer rigid-flex circuits with more layer counts and the circuit layers of rigid-flex boards are becoming thinner, new HDI technologies are used to increase interconnect density. Every layer interconnection (ELIC) is a higher HDI technology that allows PCB design engineers to Allows PCB design engineers to create ultra-thin, more flexible rigid-flex boards with high functional density. The advanced Every layer interconnection (ELIC) HDI rigid-flex boards contain multilayer copper-filled stacked microvias in pads to achieve more complex interconnects. Please see the bellow 2R+2F+2R Every layer interconnection (ELIC) HDI Rigid-flexPCB Stackup.




This 2R+2F+2R Every layer interconnection (ELIC) HDI Rigid-flex PCB stackup is applied in medical equipment requiring high-density interconnection. Stacking microvias saves space and increases density, providing greater internal connection flexibility, better routing capabilities, and lower parasitic capacitance. If you want to know more HDI Rigid-Flex PCB, please contact me freely.

HDI Rigid-Flex PCB manufacturing process

As we all know, the HDI PCB manufacturing process is complex. And the HDI rigid-flex pcb also is complex and challenged. Please see the 6 layer HDI Rigid-Flex PCB manufacturing process.

HDI rigid-flex PCB Advantages

Ordinary rigid-flex boards are increasingly unable to meet some durable, reliable, high-quality, and high-density requirements, so engineers began to develop HDI rigid-flex boards. Here are some advantages of HDI Rigid-Flex boards, which have more advantages than ordinary Rigid-Flex boards, please see the advantages below:


Thinner: HDI Rigid-Flex PCB can be as thin as 0.1 mm because of utilizing HDI technology.

Lighter Weight: HDI Rigid-Flex PCBs are 50% lighter than common Rigid-Flex boards, making them ideal for products where weight matters.

More flexible: HDI rigid-flex boards are more flexible, making them easier to use and install in a variety of applications.

Higher reliability: HDI rigid-flex PCBs are more reliable because they have thinner circuits and higher interconnect density.

HDI rigid-flex PCB Application

HDI rigid-flex boards are used in a variety of consumer electronic devices, medical equipment, military equipment, and the aerospace industry.


Consumer Electronics

HDI rigid-flex pcb has a higher interconnect circuit density, more flexible, mobile phones, laptops and tablets Electronic devices capable of bending or bending, such as mobile phones and tablets. Because HDI rigid-flex pcbs are more resistant to vibrations and shocks, they are also suitable for use in electronic equipment that often moves or is subject to shocks.


Medical equipment

HDI rigid-flex pcb is smaller, lighter, flexible and versatile, suitable for use in a variety of medical devices such as pacemakers, implantable cardioverter defibrillators (ICD), MRI machines, cochlear implants and wearable medical equipment.


Military equipment

With the rapid development of military technology, the requirements for electronic equipment are getting higher and higher. HDI rigid-flex pcbs are light, flexible and resistant to shock and vibration. So it can be customized to meet the specific needs of the army.


Aerospace industry

HDI rigid-flex pcbs are constructed of layers of conductive material and a dielectric substrate bonded together to form a rigid board with flexible connectors. This unique construction provides exceptional strength and durability while allowing design and routing flexibility. Therefore, it is very suitable for extreme environments and is used in different aerospace applications, including avionics, satellite communications and aircraft control systems.


Any HDI Rigid-flex pcb demands, please contact me freely. Our professional engineer help to solve your questions online.


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BETON Rigid-Flex PCB facotory products are widely used in communication equipment, industrial control, automotive, medical equipment, security electronics, consumer electronics, aerospace and other high-tech fields.

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