How to Design an HDI PCB

Getting started with designing an HDI PCB can be a daunting task. There are so many things to learn, and so many different aspects of the process. One of the first things to learn is what kinds of designs are accepted and how they are built. Another thing to learn is how to design surface mounts and micro vias. This is important because these types of designs are gaining popularity in the industry, and it’s important to know what the design guidelines are.


Using microvias in HDI PCBs has many advantages, not the least of which is that they take up less space. This, in turn, enables more circuitry to be produced on a single surface. The use of these smaller holes also means that there are less layers to manufacture.

However, deciding upon the microvias that are best suited for your application requires careful consideration. First, you should choose the material that you want to use for your stackup. It’s a good idea to choose a material with a higher Tg. The higher the Tg, the better your chances of surviving more lamination cycles.

The pad size is another consideration. If you have a very coarse BGA component, you may need a pad that is much larger than the hole itself. You can figure this out by referencing the IPC standards based on your product class.


LDI is an amazingly advanced imaging method that’s already a great improvement over conventional methods. It eliminates the need for a photographic plate to cover the panels during the exposure process. This technology allows manufacturers to print dynamic series numbers, date markers and other special personalization features.

The image is then transferred to a copper-clad laminate. The photoresist is then exposed to chemicals to preserve the circuit pattern. The resulting film is plotted from the Gerber data.

Using LDI, manufacturers are able to achieve a tight registration tolerance over the entire area of PCB panels. This helps eliminate the problems of light reflection. It also minimizes environmental impacts.

Moreover, LDI technology provides high-quality exposure of fine lines. This is the ideal solution for PCBs with trace widths that are 0.05/0.05mm (2/mil) or less. This can increase the reliability of your board and improve its electrical performance.

Surface mount

Unlike conventional PCBs, HDI PCB has a smaller footprint, tighter spacing, less number of layers and a more compact structure. This reduces board size and weight and improves signal quality. This technology is commonly used in military, aerospace and industrial applications. The market for HDI PCB is growing rapidly, as manufacturers are responding to the increasing demand for efficient and cost-effective devices.

This technology requires special processing and manufacturing processes. The resultant PCB is more efficient and durable. This technology is ideal for use in complex packages, dense packages and flexible applications.

Compared to through-hole PCB, HDI offers superior reliability and lower cost. They are also very compact and lightweight. They are used in a wide variety of applications, including laptop computers, tablets, digital cameras, wearables, military and defense equipment and VR sets.

Stack-up of first step

Printed Circuit Boards are now being manufactured in mass quantities. They have become key to the design of small electronic products. The trend in miniaturization has forced PCBs to keep up.

One of the most important aspects of PCB layer stackup is component packing. The proper stackup will improve electromagnetic compatibility and reduce radiated emissions. This will also help with the overall cost of production.

Another key aspect of stackup design is the sequential arrangement of layers. This is also important for high speed signal designs. The number of layers should be determined based on the microstrip thickness. In addition, the spacings between layers must be within ten percent tolerances.

Choosing the right materials is an important factor in the design process. The correct choice will also prevent mistakes that may increase the noise level of a circuit.

Design tools for HDI PCB

Printed circuit boards have largely revolutionized the electronic industry. They are used in a variety of devices, from mobile phones to digital cameras. The demand for PCBs is growing rapidly. These boards are also utilized in a number of industries, including medical and aerospace.

HDI PCBs are ideal for military applications, as well as other electronic devices, such as laptop computers and wearable tech devices. They are lightweight and highly reliable. They also offer reduced costs.

The benefits of HDI include reduced signal loss and improved electrical performance. They are also useful in military applications, as they withstand harsh environments. They are also popular in digital cameras, laptop computers, and touch screen devices.

While designing an HDI PCB, you must take into account thermal, electromagnetic, and other physical constraints. You also need to ensure that your design has high signal integrity. This includes sufficient digital and ground planes, analog signal isolation, and power isolation. You must also plan for the best trace lengths and widths.