High-frequency PCBs are ideally suited for communications applications such as radar, antennas, microwave, and guidance systems. They can provide better electrical performance than their low-frequency counterparts and transmit electromagnetic waves up to frequencies in the GHz range. High-frequency PCBs typically require a large number of dense alignments and complex components, such as small through-hole sizes and fine-pitch technology. This allows speeds in excess of 1 GHz while reducing interference and improving operational stability and electrical performance. Common applications for high-frequency PCBs include aerospace, medical devices, 5G communications, and gaming electronics. High-frequency PCBs require special attention when designing, as they are more fragile than other types of PCBs and require a more complex manufacturing process, followed by an in-depth look at the processes involved in printing high-frequency PCB boards.
High-frequency PCB board manufacturing process
First, open material
Board as the core material for the production of printed circuit boards, bearing the printed circuit board conductive, insulating, supporting the three major functions, the quality of which determines the performance of the printed circuit board, the quality of manufacturing in the processability, manufacturing level, manufacturing costs, and long-term reliability. Other manufacturing processes are: the inner line, compression, laser drilling, mechanical drilling, copper sinking, plating, graphics, solder mask, text, flying pins, moldin,g, and other production lines.
Second, high-frequency PCB board mechanical drilling
Through the use of numerical control technology, control the high-speed rotation of the cutting drill and PCB board high-speed accurate relative movement, to realize the PCB board drilling processing in different locations. Adoption of an all-digital dynamic simulation analysis design means, high-precision parts and a scientific and mature manufacturing process, as well as strict quality control, to ensure the machine's high-precision drilling accuracy. The three axes are driven by high-speed linear motors, with advanced digital control technology and excellent performance of the high-speed spindle, as well as independent fast drilling function, to ensure high-efficiency drilling efficiency, drilling 0.25mm small aperture faster.
Third, high-frequency PCB board plating and copper sinking
In the high-frequency PCB board electroplating copper pretreatment, generally uses the copper deposition process and conductive adhesive process, Topfast uses a horizontal copper immersion line, deburring, and slag removal horizontal copper immersion line to ensure process quality and production efficiency, compared to the traditional process of vertical copper immersion line, horizontal copper immersion line copper deposition speed is fast, high palladium concentration, suitable for high-aspect-ratio of the production of boards, the aspect ratio can be done to 12:1, and the inner layer of copper and hole copper The combination of the inner layer of copper and hole copper is better, the deposition rate is fast, for blind holes can deposit good chemical copper layer, do HDI board without pressure.
Fourth, high-frequency PCB board LDI exposure
The use of an LDI exposure machine for high-precision exposure, for the demand for high-precision communication module boards, and industrial boards, the minimum line width line spacing can reach 3mil, in order to meet the PCB board precision line design. The corresponding line graphic file is imported, put into the substrate board with the pressed film, and the exposure is executed, and the dry film in the graphic area is cured by the energy of the laser light source, which greatly improves the product quality. The image is directly imaged on the PCB by laser scanning, resulting in a finer and more accurate image.
Topfast high-frequency PCB board prototyping manufacturer, specializing in difficult unconventional boards, precision boards, and special boards, providing high-frequency PCB board prototyping, production, and processing services, expedited 8 hours, 12 hours, 24 hours, 48 hours, etc., with excellent workmanship and high test pass rate. Topfast offers up to 16-layer high-frequency customizable PCB boards, ideal for communication and radar applications. Our boards feature copper-filled vias, high-density designs, crisp details, and gold-plated exteriors. With up to 16 customizable layers, you can customize your wiring needs and reduce interference between components. These boards offer excellent assembly capabilities for industry-leading quality.