High Density Interconnect Manufacturer UK & Europe

High-Density Interconnect (HDI) PCBs are at the core of modern electronic innovation, enabling compact, high-performance, and reliable devices across industries. As electronic products continue to shrink in size while increasing in functionality, HDI technology has become essential for achieving superior circuit density and signal performance.

At Rush PCB UK, we are experts in Printed Circuit Board design, engineering, and manufacturing. As the leading high-density interconnect board supplier in the UK for more than two decades, we have been developing our expertise, working with clients across various industries, and delivering the very best PCBs.

Whether your requirement is for a standalone PCB project or you need assistance with design, manufacturing, and assembly, we will get it done. We have all the necessary equipment to fabricate your HDI boards, test them, and ensure they are fit for the next stage of your project. By choosing British-made HDI circuit boards from Rush PCB UK, you gain the following advantages:

British Manufacturing Excellence

We are at the forefront of the global printed circuit board industry in the HDI
UK. We offer cutting-edge technology, precision manufacturing, and a dedicated commitment to quality.

Advanced HDI Capabilities & Specifications

Our advanced HDI UK PCBs feature fine lines and spaces, along with microvias and high connection pad densities for high-performance, compact devices.

Fast UK Delivery & Support

Our high-technology, HDI PCB manufacturing services in the UK come
with quick turnaround options, such as 1-day, 2-day, 3-day, 4-day, and 5-day
services. Moreover, we offer 24×7 support for design, engineering, and
manufacturing.

In contrast with standard PCB technology, UK PCB fabrication of HDI boards offers a much higher density of components. The traces are thinner, more closely packed, and interconnected with microvias. This allows the use of miniature SMDs, enabling them to be mounted very close to each other.

We manufacture HDI UK PCBs with a symmetrical structure, with the inner layers forming the symmetry axis of the board, while the outer layers serve to clamp the inner layers. HDI builds are typically 1+N+1, 2+N+2, 3+N+3, 4+N+4, and 5+N+5 types.

Our high-density interconnect UK manufacturing capabilities include
fabricating PCBs made of various exotic materials like FR4, high Tg substrates, metal substrates, and high-frequency boards. We offer single- and multi-layer PCBs to meet all your requirements for high-quality boards of any type.

Technical Specifications

We offer HDI assembly in the UK with the following specifications:

Layer Count:
4-20+ Layers

Via Technology:
Microvias, Blind/Buried Vias

Trace Width/Spacing:
Down to 50μm/50μm

Via Size:
0.1mm diameter microvias

Materials & Substrates

For your HDI circuit boards in the UK, we can source materials and
substrates from the suppliers you specify or from our stable suppliers. We offer various types of materials and substrates, including:

FR4 High-Performance Variants

With electronics moving toward higher power densities and higher frequencies, as British HDI manufacturers, we are using enhanced FR4 materials that exceed the limits of traditional FR4 performance. These variants include High-Tg FR4 with a glass transition temperature of above 170 °C, and Low-Dk FR4, which is optimized for improved signal integrity at high frequencies.

Rogers High-Frequency Materials

For our HDI assembly in the UK, we offer the Rogers RO4000 series hydrocarbon ceramic laminates and prepregs for high-frequency applications. Rogers RO4000 series is useful for microwave and millimeter wave frequencies, as these are low-loss materials, with a well-controlled dielectric constant.

Polyimide Flexible Substrates

For flexible HDI boards at our HDI PCB design services UK, we use
substrates of Polyimide films like Kapton. These offer good electrical
performance along with providing heat resistance and flexibility. Other
Polyimide flexible substrates we use include Polyester, PEN, PET, LCP, and composites.

As an HDI PCB manufacturer in the UK, we follow a set of manufacturing
standards and certifications to ensure consistent quality, reliability, and
performance of our HDI boards. They cover various aspects of the process during manufacturing, and this includes materials, design, assembly, testing, environmental conditions, and safety. Briefly, these include compliance with:

IPC-6012 Class 3 Compliance

These standards cover a wide range of topics, including design guidelines, materials, and processes. The IPC-6012 Class 3 compliance ensures our British-made HDI circuit boards meet extreme durability and precision standards, as demanded by aerospace, medical, and military applications.

ISO 9001:2015 Certified UK Facility

Ours is an ISO 9001:2015 certified UK facility. As a British HDI
manufacturer, we operate within a framework that implements effective quality management systems. Compliance with ISO 9001 quality standards allows us to demonstrate our commitment to meeting customer requirements, continuous improvements, and adherence to defined processes.

AS9100 Aerospace Standard

As a high-density interconnect board supplier in the UK, we conform to
The AS9100 Aerospace Standard for designing, developing, and providing aviation, space, and defense products and services to improve quality, cost, and delivery performance. We accomplish this through the reduction and elimination of organization-unique requirements, wider applications of good business practices, and the implementation of quality management systems.

Telecommunications & 5G Infrastructure

Our HDI circuit boards UK offer a decisive edge in the mobile environment, as product cycles here are short and competitive. We refresh designs rapidly while integrating new features. Our HDI designs ensure short and well-isolated signal paths.

Medical Devices & Healthcare Technology

Cleanliness and traceability are highly desirable aspects in medical equipment. We manufacture our HDI UK boards with medical-grade laminates that are capable of resisting moisture and sterilization chemicals. We ensure that, even under repeated use, the device’s performance remains steady.

Aerospace & Defense Electronics

PCBs used in the aerospace and defense sectors undergo the harshest conditions imaginable. Our HDI UK boards can withstand extreme mechanical shocks, radiation exposure, temperature, and interference from electronic warfare. For us, failure is not an option.

Automotive Electronics & EV Systems

In contrast to performance requirements in mobile and telecom devices, the automotive industry requires PCBs to be durable. In operating vehicles, our HDI UK boards endure vibration, heat, and long operating hours. Yet, they deliver consistent speed and precision.

Consumer Electronics & IoT Devices

Here again, intense competition forces product cycles to be short, and our HDI assembly UK PCBs hold a decisive edge. We stack more layers of circuitry in our HDI boards, which minimizes board area while improving performance and functionality.

Via Structure Design Rules

As microvia PCBs in the UK, our HDI boards make extensive use of microvias with holes less than 150 microns in diameter. We also use blind and buried vias, and we stack or stagger them as necessary to gain maximum routing space.

Layer Stackup Optimization

At our UK PCB fabrication, although we typically employ the 1+N+1 and 2+N+2 structures, our advanced HDI boards typically employ any-layer technology. We use microvias to connect any two adjacent layers in the board.

Signal Integrity Considerations

Our highly advanced HDI circuit boards in the UK take care of critical signal integrity management. We typically keep signal traces close to reference planes, while avoiding crossing splits in reference planes.

Thermal Management in HDI Designs

As a British HDI manufacturer, we design our HDI boards for efficient thermal management. For this, we start with suitable low-loss and high thermal conductivity materials. We also use copper-filled microvias for better heat conductivity.

Sequential Lamination Technology

As an HDI PCB Manufacturer in the UK, our manufacturing process involves creating individual subsets and sequentially bonding them together. These subsets undergo the same manufacturing process as the final board. Typically, prepreg sheets between each pair of subsets help in the bonding process.

Laser Drilling & Microvia Formation

We use a tightly focused laser beam to create the holes in our microvia HDI PCB UK, which we then plate to create microvias. The spot size of the laser beam decides the hole diameter, and we use staggered and stacked microvias.

Advanced Plating Processes

Our UK PCB fabrication uses advanced plating processes to build up a layer of copper on both the board and the surface of the microvia. This is a critical process for ensuring the integrity of the PCB, as there are high-density interconnections.

Quality Control & Testing

Our HDI PCB design services in the UK ensure quality by using advanced inspection methods involving AOI and X-Ray inspections to detect defects. We also ensure the reliability of our boards by subjecting them to reliability tests that include thermal cycling, electrical performance tests, and vibration testing.

Competitive HDI Pricing Structure

By simplifying the stacking structure, our engineers at UK PCB fabrication can optimize the number of layers in the stack, thereby making the HDI pricing structure highly competitive.

Fast Turnaround Options

Our special HDI UK PCB quick-turn, rapid-cycle production process results in fast turnarounds that benefit our customers. We typically ship simple HDI boards in 24 hours, and complex boards in about 5 days under our fast turnaround options.

Volume Discounts Available

At our HDI PCB design services in the UK, production volumes significantly influence the cost of our HDI PCBs. With increasing quantity, the unit cost decreases substantially, as we can spread our fixed costs across a larger number of units.