Circuit board stencil, also known as pcb stencil, is an important tool used to guarantee the quality of circuit boards and plays a key role in PCB manufacturing. It consists of a layer of metal mesh fixed on the surface of the printed circuit board, which is used to control the position of solder paste […]
A stencil printing is an important tool used in the PCB manufacturing process. stencils used in electronics factories are mainly used in the manufacture of parts of printed circuit boards. They are an integral part of modern electronics, and it can not be made without the use of stencils in electronics factories. A stencil is
What is solder mask layer? Soldermask, the soldering surface layer used to assemble electronic components, is usually made of a solderable material with a specific surface treatment and chemical composition that allows the components to be easily attached to the PCB. The surface of the soldermask is usually coated with a thin layer of solder
Solder balls are small spheres made of pure tin or tin alloy. It has good corrosion resistance and electrical conductivity, so they have a wide range of applications in electronic component manufacturing, soldering and energy storage. Classification of tin balls1.SnPb C4 Bump (SnPb C4 tin ball)Traditional solder balls made of tin-lead (SnPb) alloy with a
What is a substrate in semiconductor?A semiconductor substrate is a key material used in the manufacture of integrated circuits. It is usually made of monocrystalline silicon and is characterized by high purity and absence of impurities. The surface of the substrate is coated with a layer of photoresist to create graphics by photolithography. Oxide and
Thick film ceramic pcb is printed metal wiring layer by screen printing process, and then degreased and sintered (generally 850~900℃) to form a circuit. Depending on the viscosity of the metal paste and screen mesh size, the thickness of the prepared metal wiring layer is generally 10μm to 20μm (increasing the thickness of the metal
Flexible Copper Clad Laminate (FCCL) refers to a kind of flexible insulating materials such as film on one or both sides, through a specific process, and copper foil bonded together with the formation of copper cladding board, FCCL is a flexible circuit board (Flexible Printed Circuit, FPC) processing substrate, according to the structure of the
Coplanarity, or the degree of co-planarity of the pins, refers to the deviation of the ends of the pins of an SMT component relative to an ideal plane. Ideally, all pins should be completely coplanar so as to ensure good contact with the PCB pads during the placement process. Insufficient coplanarity may lead to poor
In the design and manufacture of circuit boards, pcb dimensions tolerance is a very critical issue that directly affects the effectiveness and performance of the circuit board.PCB board dimensional tolerances refer to the range of deviations allowed on the basis of set standard dimensions.Usually the dimensional tolerances of pcb plates are categorized into maximum and
What is solder flux? Flux is a substance that helps soldering of electronic components, and at the same time protects the soldered parts and prevents oxidation. Common fluxes are rosin-based mixtures that remove oxides from the solder and the soldered surface, thereby reducing surface tension and improving solderability. Solder flux according to its form can
Flexible aluminum pcb refers to the aluminum as the substrate, through a variety of ways to enhance the flexibility of the material of a material. The addition of other elements, the modulation of the organizational structure and the treatment of the surface can improve the flexibility of the aluminum substrate without affecting its thermal conductivity
Flex PCB coverlay is an insulating protective layer covering the surface of the flexible printed circuit board, playing a role in protecting the surface conductors and increasing the strength of the substrate. The protective material of the outer layer of graphics, there are generally two types to choose from. The first type is dry film
Aluminum substrate pcb is a kind of metal-based copper cladding board with good heat dissipation function. Generally, the single panel consists of three layers of structure, which are circuit layer (copper foil), insulation layer and metal base layer. For high-end use, there are also designed for double-sided boards, the structure of the circuit layer, insulation
Soldering tinning is an important industrial raw material for connecting electronic components in soldered circuits. It is a kind of solder with a low melting point, mainly referring to the solder made of tin-based alloy. The production method of soldering tin is to melt the ingot first, and then pressure processed into material. An important
Circuit boards are an integral part of modern electronic equipment, and they are usually subjected to a variety of processes during production, such as drilling, surface treatment, gold sinking, soldering, etc., as well as being exposed to a variety of contaminants and chemicals. Therefore, cleaning circuit boards is necessary to remove surface contaminants and improve
Teflon material is polytetrafluoroethylene, the Chinese name Teflon, Teflon is a resin, the chemical name is called polytetrafluoroethylene, is the ethylene (C2H4) in the four hydrogen (H) are replaced by fluorine (F), into tetrafluoroethylene (C2F4), and then formed by polymerization. Since Teflon is made of carbon and fluorine atoms and does not contain hydrogen, it
Waterproofing electronic circuit boards means that the environment around and within water can prevent the equipment from being damaged by moisture or immersion in water. Generally, the waterproofing of circuit boards is realized by applying waterproof coatings. At the same time, in the design and installation of circuit boards, it is also necessary to consider
A 4 layer PCB, or four-layer printed circuit board, adds two internal copper layers to form a signal layer and a power layer compared to a double-layer PCB. As a result, the components on the PCB can be arranged more densely, resulting in smaller packages, higher levels of integration, and better immunity to interference. At
What is a heat sink in PCB? A heat sink is a component made of a thermally conductive metal with a large surface area. It is usually connected to pcb components, including power transistors and switching devices. The function of this part is to absorb and dissipate heat. PCB heat sinks work through the principle
What is LTCC?LTCC is Low temperature cofired ceramic, low temperature cofired ceramic technology. Low temperature cofired ceramic technology (LTCC: low temperature cofired ceramic) is a multilayer circuit made by stacking unfired cast ceramic materials together, with printed interconnect conductors, components, and circuits inside, and sintering the structure into an integrated ceramic multilayer material. LTTC utilizes
SIP (System in Package) and SOC (System on Chip) as two important trends in PCB design, their development not only affects the performance and size of the product, but also has a far-reaching impact on the future direction of the entire electronics industry. SoC is System on Chip. From a narrow perspective, SoC is the
Microwave circuit board is a special kind of circuit board, which has good performance for the transmission of high-frequency signals. Compared to general printed circuit boards, it has a more unique circuit layer structure, commonly single, double and multilayer. Microwave circuit boards (high-frequency boards), refers to the specific microwave substrate copper-clad boards, the use of
What is Solder Paste Inspection?SPI, or Solder Paste Inspection, is a technique for inspecting the solder paste printing aspect of SMT processing. It evaluates the printing quality of solder paste by measuring the volume, area, height and other parameters of the paste on the circuit board, so that problems such as insufficient, excessive or offset
Solder mask in pcb, is also called PCB solder mask film in flexible circuit boards, using green, yellow, red, black, blue and other photosensitive inks sprayed on the surface of the PCB circuit board.Solder Mask is a protective layer applied to the surface of a circuit board that prevents short circuits from occurring when other
