In the mSAP process, the core of impedance control lies in ensuring that the impedance of PCB traces meets design standards through comprehensive parameter management throughout the entire process. Compared to traditional subtractive methods, impedance control in the mSAP process is characterised by three key aspects: precision, consistency and adaptability. Whilst impedance deviations in traditional […]
The flight control board is the core control unit of a drone, responsible for attitude calculation, sensor fusion and the execution of flight algorithms. Its PCB primarily carries high-speed signals, placing extremely high demands on impedance control, signal integrity and EMI/EMC performance; it typically employs an HDI structure and micro-blind via design to achieve a
mSAP (Modified Semi-Additive Process) is a high-precision manufacturing technology designed for High-Density Interconnect (HDI) PCBs. Its core principle is ‘seed copper plating + selective etching’. By adopting an ‘additive’ approach—the opposite of the traditional subtractive method—it achieves fine-line processing: an ultra-thin copper foil, just 3μm thick, is bonded to the substrate; photoresist is used to
FPC surface treatment is not merely an optional auxiliary process, but a critical step that determines soldering reliability and storage life. Bare copper is highly susceptible to oxidation; without protection, subsequent processes such as surface-mount assembly and bonding face a high risk of failure. Different surface treatment processes correspond to varying costs, performance characteristics and
With 5G moving towards millimetre-wave frequencies and 6G targeting the terahertz range, high-frequency signals place unprecedented demands on PCB substrates to achieve low loss. Low dielectric polymer materials, with their extremely low dielectric constant (Dk) and dielectric loss factor (Df), have become the key to overcoming signal attenuation and ensuring stable, high-speed transmission. The core
The Multidimensional Composition of Flex PCB Thickness: Beyond the Definition of “Board Material” When we talk about flex PCB thickness, we are dealing with a dynamic, multi-material composite system. Unlike the single-board concept of rigid FR4, the thickness of a flexible circuit board (FPC) is precisely composed of multiple functional layers, and every micrometer increase
77GHz radar primarily utilises Frequency-Modulated Continuous Wave (FMCW) technology: by transmitting a linearly frequency-modulated ‘chirp signal’ and analysing the frequency and phase differences between the reflected echo and the transmitted signal, it extracts information on the target’s range, velocity and bearing. This operating principle places key demands on PCBs, and Rogers PCBs, thanks to their
Compared to conventional printed circuit boards, high layer PCBs are characterised by greater board thickness, a higher number of layers, denser traces and vias, larger component dimensions, and thinner dielectric layers. This places higher demands on the utilisation of internal layer space, inter-layer alignment accuracy, impedance control and product reliability. Key manufacturing challenges of high
The drone pcb board serves as the core component of the flight system, and its electromagnetic compatibility directly affects the stability of the drone’s flight. In high-frequency operating environments, circuit boards are susceptible to various forms of electromagnetic interference; it is therefore necessary to identify the causes of such interference and implement targeted mitigation measures.
In drone pcb board design, the printed circuit board directly impacts signal stability, flight safety and flight endurance. Striking the right balance between performance, cost, weight and reliability is key to selecting the appropriate number of PCB layers. The reason why 4-layer and 6-layer boards have become the mainstream solutions for consumer-grade and industrial-grade applications,
Ceramic PCBs are not merely a simple substitute for FR-4. Thanks to their inherent advantages—such as low thermal expansion, high insulation and high-temperature resistance—they are widely used in demanding applications such as RF communications, automotive electronics and medical equipment. However, their characteristics of being ‘hard and brittle’ and ‘sensitive to thermal mismatch’ make the SMT
Solder balls are discrete particles of molten solder that form during the reflow soldering process when the molten solder fails to wet the component leads or PCB pads properly, and subsequently splatters, separates and cools under the influence of external factors. The core mechanism behind their formation can be summarised as ‘uncontrolled solder’ – whether
Stencil design is central to ensuring the quality of SMT printing; however, in practice, three key issues frequently arise: deviations in aperture design, defects in the substrate and manufacturing process, and defects in auxiliary structures. Negligence in any of these areas can lead to soldering defects and financial losses during mass production. Three Major Categories
Surface Mount Technology (SMT) is a core process in modern electronics manufacturing. Its production workflow comprises a series of interlinked precision processes, with every stage critical to the quality and reliability of the final product. From the precise application of solder paste to the high-speed placement of components, and from ensuring electrical continuity during reflow
The stability of the dielectric constant (Dk) is central to the electromagnetic compatibility (EMC) of Rogers PCBs and represents the most significant distinction between them and standard FR-4 PCBs. Many PCB professionals encounter failed EMC tests in their projects; the root cause often lies in impedance shifts caused by fluctuations in the dielectric constant, which
The impedance of an FPC (flexible printed circuit) refers to the electrical resistance encountered by a signal as it travels along the circuit; it is a key indicator of signal transmission quality. It is not a physical barrier, but rather a composite characteristic determined by factors such as the substrate material, trace width and thickness,
FPC quotations are influenced by a combination of four key factors: materials, structural design, manufacturing requirements and order volume. Any variation in the selection or specifications of these elements will be directly reflected in the final price. MaterialsMaterial costs form the core component of FPC quotations, accounting for 30% to 50% of the total. Differences
The Physical Nature and Standard Evolution of FR4 pcb Thickness In the field of printed circuit board (PCB) manufacturing, FR4 (Flame Retardant Rating 4) is not only a material but also a cornerstone of the electronics industry. When we discuss FR4 PCB thickness, we are actually discussing a core variable that affects the mechanical strength,
The coverlay serves as the core flexible insulating protective layer for FPCs. Consisting of a PI film substrate combined with a specialised adhesive layer, it provides insulation, reinforcement and coverlay protection for flexible printed circuits through a thermal lamination process. The Core Functions of FPC Coverlay Electrical insulation protection is the most fundamental and core
In the manufacture of RF and microwave circuits, Rogers PCBs serve as the core substrate due to their low dielectric loss and high dielectric stability. As the critical process for connecting components to the PCB, the soldering process directly determines the product’s signal integrity and long-term reliability. Unlike conventional FR4 boards, the special materials used
In high-frequency circuit design, Rogers PCBs have long been recognised as the industry standard thanks to their outstanding performance. With their stable dielectric properties and low-loss characteristics, they are virtually indispensable core materials in high-end fields such as 5G communications, millimetre-wave radar and aerospace. As the key medium for signal transmission, the choice of transmission
Rogers material is the material of choice for high-frequency applications due to its excellent dielectric properties, but its high cost limits its widespread use; FR4 material offers outstanding value for money, yet struggles to meet the demands of high-frequency signal transmission. By scientifically combining these two materials, Rogers hybrid laminates achieve the dual objectives of
The extended service life of RO4835 at high temperatures stems from the systematic synergy between its material formulation, structural design and process optimisation. In harsh high-temperature environments such as outdoor base stations, automotive engine compartments and industrial equipment, standard high-frequency substrates are highly susceptible to oxidation, embrittlement and performance drift. As a core product of
As a benchmark product in the field of specialised high-frequency substrates, the thermal stability and reliability of Rogers PCBs directly determine the performance and service life of equipment in high-end sectors such as 5G communications, automotive millimetre-wave radar and medical devices. Unlike standard FR-4 PCBs, Rogers PCBs rely on a unique material system and process
