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20 mil RO4003C PCB
20 mil RO4003C PCB
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What's the Difference of HF Board, HDI Board and Ordinary PCB board?

  • May 18. 2022

The Difference of HF Board, HDI Board and Ordinary PCB board


High frequency PCB is used in radar detection, instrument and vehicle anti-collision system software, communication satellite system software, wireless communication system software and other industries. HDI board is used in small volume, multi-component electronic products, the bottom products choose double panels.


High frequency board is a special circuit board with high electromagnetic frequency, and its process performance, precision and performance parameters are very high. FR4 glass white fiber board is usually selected, and the whole board is made of epoxy glass cloth. The palette of this board is symmetrical and bright. Relative density is higher than low frequency plate. Usually, the high frequency plate is used for the frequency of more than 1G power supply circuit, its dielectric constant is very important, must be very small and smooth, dielectric loss is not easy to absorb water and moisture, high temperature resistance, corrosion resistance and other characteristics of high quality.


What is hybrid pcb? HDI board is a High power Density Inverter. It is a kind of mobile phone board with High circuit distribution Density using micro-blind buried hole technology. It is a compact product designed for small volume users. It adopts modular parallel design, a module capacity of 1000VA (height 1U), natural cooling, can be directly placed in a 19 "rack, up to 6 modules in parallel. The product adopts full digital signal process control (DSP) technology and a number of patented technologies, with full range of load adaptability and strong short-term overload capacity.


Are PCB boards with blind holes all called HDI boards?


HDI boards are high-density interconnected circuit boards. The boards with blind hole plating and secondary pressing are ALL HDI material boards, which can be divided into first-order, second-order, third-order, fourth-order and fifth-order HDI. For example, the main board of iPhone 6 is the fifth-order HDI. A simple buried hole is not necessarily an HDI.


How to distinguish First HDI PCB and second and third stage?


The first stage is relatively simple, the flow and process are easy to control. Second order began to trouble, one is the counterpoint problem, a drilling and copper plating problem. There are various designs for the second order. One is staggered positions of each order. When the secondary adjacent layer needs to be connected, the middle layer is connected through wires, which is equivalent to two first-order HDI.


The second is that the two first-order holes overlap, and the second order is realized by superposition. The processing is similar to the two first-order holes, but there are many technological points to be specially controlled, which is mentioned above.


The third way is to drill directly from the outer layer to the third layer (or N-2 layer), which is a lot different and more difficult to drill.


And the analogy of order 3 to order 2 is theta


Printed Circuit Board (PCB), also known as Printed Circuit Board, is an important electronic component, is the support body of electronic components, is the carrier of electrical connection of electronic components. Because it is made by electronic printing, it is called "printed" circuit board".


Its role is mainly electronic equipment adopts the PCB, due to the consistency of the same kind of PCB, so as to avoid the artificial connection error, and can realize automatic instrumentation or SMT electronic components, automatic soldering, automatic detection, ensure the quality of the electronic equipment, improve the labor productivity, reduce the cost, and easy maintenance.


Ordinary printed circuit board a lot of low-end materials pressed together, such as: paper substrate, composite substrate, epoxy board (also known as 3240 epoxy board, phenolic board), FR-4 fiberglass board (board) production, paper substrate and composite substrate.


Bicheng devote to supplying PCBs over 18 years with stable and strict quality gurantee, which service cellular base station antenna, satellite, high frequency passive components, microstrip line and band line circuit, millimeter wave equipment, radar system, digital radio frequency antenna and other fields wordwide. We are mainly providing high frequency PCBs which built on 3 high frequency material brands: Rogers Corporation, Taconic and Wangling. Dielectric constant ranges from 2.2 to 10.2 etc.


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