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 Used to discuss all useful information about PCB, including assembly, manufacturing, design, etc.
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Explanation of PCBA technical terms
Explanation of PCBA technical termsWe can see many technical terms in the PCBA industry. Because these words are not relatively long or exist in the form of phrases, it is not convenient to read, so we usually present them in abbreviated form, which is often not good for electronic enthusiasts or non-professionals. Next we will explore terms that frequently appear in the PCBA industry.
Commonly used professional terms in the PCBA industry
AOI: This is a detection method used in PCB assembly and PCB manufacturing, which is called automatic optical inspection. In the PCBA project, manufacturers ensure the quality of PCBA boards through various testing methods, and AOI inspection is one of them. In general, we can divide PCB testing methods into two types: equipment testing and manual testing. Just like its full name, AOI inspection is a means to rely on equipment to find component welding problems. Professional testers rely on AOI equipment to capture issues such as offset and polarity of soldered components.
AQL: This term refers to the defect rate in the PCB production process acceptable to electronics manufacturers. The full name is Acceptance quality limit. As the number of PCB layers or component soldering increases, the probability of PCB assembly or manufacturing failure increases exponentially, which is detrimental to the manufacturing cost of PCBA boards. In order to control costs and delivery time, electronics manufacturers will specify their acceptable defect rate when communicating with PCBA processing plants.
BGA: It is the term of PCB and PCBA production technology, and its full name is ball grid array. For most electronic devices, we recommend the use of integrated circuits, but traditional DIP is difficult to install components, so BGA was born. First of all, when manufacturing PCBs, manufacturers will leave rows of square dense holes on the board surface, which are used for BGA assembly. Most of the time electronics manufacturers require this technique because it increases the efficiency of the board since they use ball posts instead of pins.
CAD: It means that designers use computers and other equipment to carry out PCB layout design. The full name is computer-aided design. We can find many PCB design tools on the Internet, they may be free or paid, but most of them do not provide three-dimensional space layout, which means that you need to observe the circuit on a plane. The CAD layout tool is different, it can provide the design of three-dimensional graphics, that is to say, you can observe the layout of the PCB 360° without dead angle through this software.
CAE: An acronym for Computer Aided Engineering, referring to schematic software packages used to develop and visu... -
The Most Complete PCB Assembly (PCBA) Process Tutorial
The Most Complete PCB Assembly (PCBA) Process TutorialStep 1: Solder Paste Printing
Solder paste printing is the first step in PCBA processing. We apply solder paste to the area of the printed circuit board where components need to be assembled. This step is accomplished by applying solder paste on the stainless steel template, which corresponds to the circuit board, and the solder paste drips from the holes of the template onto the PCB. 96.5% tin is gray and it contains 3% silver and 0.5% copper. In order to protect the environment, FS Technology uses lead-free solder paste. The solder paste will be heated and melted in step 3 and form a strong joint
Step 2: Pick and Place of Components
The second step of the PCBA processing flow is to place the components on the PCB, which is completed by a high-speed SMT placement machine. At design time, the PCB designer creates a file, which is used to control the SMT device. The file identifies the X, Y coordinates of the PCB assembly, and thanks to this information, the pick and place machine accurately places the SMD components on top of the solder paste through the vacuum nozzle.
At the beginning, humans completed the picking and placement of components by manual soldering, but this is obviously not good for large-volume orders. In order to ensure fast turnaround, we use SMT assembly machines, which can ensure the consistency and accuracy of PCBA.
Step 3: Reflow oven melts and cures solder paste
We need to use a reflow oven to melt and solidify the solder paste. It is best to use equipment with ten temperature zones for this process. The PCB is transferred to the reflow oven through the docking station. The oven can generate a maximum temperature of 250 degrees Celsius, which is enough to completely melt the solder paste. The melted solder paste will form a joint at the junction of the PCB and the component, forming a strong solidified solder joint after entering the cooler, which will create a permanent joint between the SMD component and the PCB.
Step 4: QC Check
Due to the influence of many factors, the soldering quality of the circuit board may be poor. Since the circuit board is an essential component in electronic equipment, no matter how small the error is, it will lead to a circuit board short. Therefore, we need to use a variety of detection methods to ensure its quality.
Manual Inspection... -
What you have to know about PCB manufacturing and assembly
As far as modern PCB manufacturing technology is concerned, electronic products are advancing at a very fast pace and it has a great impact on our daily life. Human habits of using electronic products are changing. This PCB manufacturing and assembly technology advances have brought many advanced devices in the world that we could not imagine about 10 years ago.
A PCB is usually usually a green piece of component that can be rigid, flexible, rigid-flexible with various electronic components on it. After the manufacturer mounts the different components on the PCB we call it a PCBA board. These assembly or soldering techniques include: SMT assembly, DIP assembly, hybrid assembly, BGA assembly, etc. A PCB consists of a substrate made of glass fiber, components, copper layers for making alignments, holes for mounting components and layers that can be both inner and outer layers. At FS Technology, you can get prototype rigid PCBs with 1-56 layers
The inner PCB substrate and electronic components are insulated with a solder resist layer and held together with epoxy resin. In addition to our common green boards, there are a large number of other colors of solder resist layers: red yellow, purple, etc. The function of the circuit solder resist layer is to block the components from the tracks to avoid a short circuit in the circuit board or a short circuit in the components.
The role of PCB copper traces is to transfer the signals of electronic products from the left side of the board to the right side of the role. Common types of signals include high speed digital signals and discrete analog signals. Customers can make their own demands on the manufacturer, and FS Technology believes in making thicker traces to carry power/electricity to power the components.
For 5G base stations or microwave circuits that require the use of high power currents or voltages, the PCBs used in the circuit are set up with a ground plane, and the top PCB components are connected to the internal GND plane or internal signal layer through "vias".
PCBA fabrication, or PCB board assembly, is the process of mounting electronic components onto the surface of a bare board circuit so that the circuit will function as the engineer intended. Electronic engineers design these circuits for the purpose of realizing PCB functions. If the assembly manufacturer makes a slight mistake in the assembly work, the PCBA will not be able to run. Common mistakes made by non-standard PCB assembly manufacturers include: wrong placement of SMD components, scratches on the bare PCB, and no electrostatic treatment.
There are many functions of PCBA, some complex and some simple, it all depends on the customer's needs and description. Manufacture... -
pbc circuit board design software-FS Technology
Abstract: Design a printed circuit board based on a schematic circuit to perform the functions required by the circuit manufacturer.Print design design refers to the circuit design, which must take into account the external design of the joint, the detailed design of the internal electrical components, and the detailed design of the metal joints and holes. What are the PCB circuit board design software? FS Technology will introduce you the mainstream pbc circuit board design software
The most popular circuit board design software in China
Protel, protel 99se, protel DXP, Altium are widely used in China. All of this software is developed and continuously developed by the company; the current version, Altium Design 15, is straightforward and can be used to easily create FS Tech PCB boards. But these softwares are not suitable for making hard PCBs.
FS Technology-hot swap pcb
Design better circuit board design software
Cadence SPB software Cadence SPB is Cadence software, the latest version is Cadence SPB 16.5; ORCAD design program is a global standard, and is also the most used circuit board design software by FS Technology; PCB design and simulation are more complete, and the use is much more complicated than Protel. The requirements and features are complex; but the rules are designed for the design, so the design is better, less work, and significantly stronger than the prototype.
FS technology pcb designer
Circuit board design software that few people use
Metor Boards and EEs, which only work on BOARDSTATION UNIX systems, are not designed for PCs, so they are rarely used; the current MentorEE version is Mentor EE 7.9, Cadence SPB is the same standard as PCB design software, and in some respects is better than Cadence Poor SPB. FS Technology has hardly used this type of board design software
FS Technology pcb fabrication
The most popular circuit board design software in Europe and America
Eagle Layout is the most widely used PCB design software in Europe. Most of the PCB design software mentioned above are the most widely used, with Cadence SPB and Mentorai kings being the most ideal. If you are new to PCB design, FS Technology believes that Cadencespb is better, it can give manufacturers a good design experience and ensure good design quality. -
The value of pcb copy board-FS Technology
On the one hand, it promotes the research of forward technology, and on the other hand, reverse research finds a broad space for development, which brings more opportunities for e-commerce.Summary: The PCB hype industry is also often referred to as circuit board copying, PCB copying can accomplish the removal of entire technical data sets from any electronic product, as well as product simulations and clones. So what is the cost of PCB copying? How to use PCB copy board? Then let's learn about it with FS Technology.
1. FS Technology analyzes the pcb copy board from a professional point of view
PCB clones can help businesses stay up to date and keep up with the latest trends. Bring products to market in the shortest time and with the lowest development costs. And with the support of today's nearly perfect FS technology electronic cloning technology, product quality has been consistently guaranteed.
2. In terms of user experience
The pcb circuit boards produced by FS Technology are of good quality and low price. easily accepted by the public. It can not only enrich people's lives and experience new emotions of fashion trends, but also improve the profitability and industry competitiveness of enterprises.
3. For specific industries or research institutions.
It can quickly overcome technical barriers, promote the development of active research, and narrow the gap with advanced technologies in developed countries. It is an effective and necessary tool.
4. About reproduction technology
FS Tech copy board is not just copying or copying from time to time. It belongs to the field of reverse research. Once you have mastered the technology of the original equipment and tested its operation and use, you can carry out secondary development, that is, on the basis of fully understanding its schematic diagram, you can cut the product you need. Not only can you avoid "copyrights," but you can build your brand quickly, with shorter growth cycles, lower costs, and great profits.
5. For the entire pcb industry
Help to accelerate the development of the entire pcb industry. FS Technology electronic engineers are also actively looking for ways to maintain their superior market competitiveness and enhance product differentiation for a longer period of time. Its characteristic competitiveness has been maintained for a long time. -
Basic knowledge of PCB board making-FS Technology
Therefore, the copper surface of the PCB used for soldering must be protected by a solderability protective layer or a solderability barrier layer in order to reduce or avoid failure problems.PCB concept
PCB can be said to be common or uncommon in our lives. It is an important electronic component and a support for electronic components. All electronic products in our lives contain PCB boards. The full name of PCB is Printed Circuit Board, which is called "printed" circuit board because it is made by electronic printing.
The role and function of PCB in various electronic devices
1. Pad: Provide mechanical support for fixing and assembling various electronic components such as integrated circuits.
2. Wires: wires used to connect various electronic components, which can help circuit boards achieve wiring and electrical connection (signal transmission) or electrical insulation between components. Provide the required electrical characteristics.
3. Green oil and silk screen: Provide solder mask graphics for automatic assembly, and provide identification characters and graphics for component insertion, inspection, and maintenance.
Development history of PCB technology
Since the advent of PCB, if we look at the development of PCB assembly technology, FS Technology has divided it into three stages
THT-Through Hole Technology Stage
The role of metallized holes:
(1). Electrical interconnection---signal transmission
Literally, the electrical appliances are directly connected or indirectly connected through transformers and the like
(2). Supporting components---pin size limits the reduction of through hole size
a. Rigidity of the pins
Pin, also called pin. It is the wiring from the internal circuit of the integrated circuit (chip) to the peripheral circuit, and all the pins constitute the interface of this chip. A segment of the end of the lead, which is formed by soldering to form a solder joint with the pad on the printed board. Pin can be divided into bottom, toe, side and other parts.
b. Requirements for automated instrumentation
There are three ways to increase density
(1) Under the regulations (aperture ≥ 0.8mm) to reduce the size of the device hole, why is there a regulation? This is because of the rigidity of the component Pin pins and the limitation of the insertion precision.
(2) Control line width/spacing: 0.3mm—0.2mm—0.15mm—0.1mm
(3) Increase the number of layers of the circuit board: the better the technology, the more layers can be added, FS technology can achieve all the layers, 64 layers - 12 layers - 10 layers - 8 layers - 4 layers - double-sided - single noodle,
The perfect circuit board made by FS Technology
SMT-Surface Mount Technology Stage PCB
1. The role of the via hole: it only plays the role of electrical interconnection, the aperture can be as small as possible, and the hole can also be plugged.
2. The main way to increase the density
①. The size of the via hole decreases sharply: 0.8mm—0.5mm—0.4mm—0.3mm—0.25mm
②. The structure of the via has undergone essential changes...
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