About Wonderful
Shenzhen Wonderful Technology Co., Ltd. is China’s top model and small batch circuit board manufacturer.
The company targets precision circuit board samples and small batches as the main target market. Since its establishment, it has adhered to the development concept of good quality and important reputation.
Invest huge sums of money to introduce advanced equipment, strictly regulate the operating standards and QC standards for incoming and outgoing materials, to ensure that the shipped products reach Seiko quality.
The self-developed ERP management system can realize the whole process of paperless operations such as online ordering, online payment, online production progress query, online logistics tracking, and online statistical report production, which greatly improves work efficiency.
It ensures that each order can be shipped quickly. After more than ten years of development, the company’s products and services have been well received by the market.
As well as the opening of an electronic component mall, integrated circuits, semiconductors, resistors, capacitors and other products are sold.
The company’s scale is developing rapidly, and the sample and small batch shipment capacity reaches 500 models/day.
The products are widely used in communications, medical equipment, industrial control products, aviation, military products, testing instruments,Automotive, computers and other peripheral products.
We will continue to pay attention to customers, with efficient delivery speed and perfect after-sales service, to become the most trusted brand supplier in the PCB industry.
Wonderful PCB You can send us your requirements first. Click here to contact us.
You can click our component store. Please click here to contact us.
Contact Us
Our Service
1. Various types of PCB design services, including multi-layer, rigid, flexible, rigid-flex PCB.
2. Easily complete highly complex and dense PCB layout designs.
3. Advanced component packaging and library creation, including BGA, QFN packaging.
4. High-speed PCB design, including differential pairs, length matching, etc.
5. High expertise in critical and sensitive signal routing of analog and digital circuits.
6. PCB reverse engineering service
7. Redesign services to correct defects or optimize existing PCB designs to reduce costs
8. PCB prototyping
9. PCB manufacturing
10. PCB design and testing services
Why should you let Wonderful do your PCB board design?
Wonderful Electronics believes in getting it right the first time. Featuring exhaustive white box technology, it ensures that any entrained errors are corrected before the product is brought into your hands. This saves you time, cost, and the frustrating vicious cycle of incorrect output and changes to correct it.
We specialize in electronic product design, including PCB design services. They also offer prototyping services so that you can test device compatibility with PCBs before mass production.
We have over 10 years of excellence in designing and manufacturing a wide range of electronic products that are cost-effective without compromising quality.
Our PCB design services have a high success rate and follow all well known good design practices to ensure nothing goes wrong so your products can get to market faster.
Located in Shenzhen, Wonderful PCB aims to provide our customers with PCB design services, embedded system design and electronic manufacturing to reduce costs and improve quality levels.
Note: The following contents are excerpts from previous articles. For details, please click the link below.
The Best PCB Design Process, Explained for Free
PCB Design Flow Chart
Preliminary Preparation
This includes preparing footprint libraries and schematics.
Schematic
Analyze how to design the schematic, you can search for references to ensure accuracy, this step will affect the subsequent production of the PCB.
Design Schematic Components
Design schematic components and build your own component library. If you encounter an uncertain circuit or component in your design, you can perform circuit simulation.
PCB Structure Design
In this step, according to the determined circuit board size and various mechanical positioning. draw the PCB surface in the PCB design environment, and place the required connectors, buttons, screw holes, assembly holes, etc. according to the positioning requirements.
And fully consider and determine the wiring area and non-wiring area (such as how much area around the screw hole belongs to the non-wiring area).
Guide Netlist
It is recommended to import the board frame before the netlist. Import the board frame in DXF format or the board frame in emn format
Rule setting
Reasonable rules can be set according to the specific PCB design. The rules we call are the constraint manager of PADS. Through the constraint manager, the line width and safety distance are constrained in any link in the design process. Where the constraints are not met During subsequent DRC detection, it will be marked with DRC Markers.
The general rule setting is placed before the layout, because sometimes some fanout work needs to be completed during the layout. so the rules must be set before the fanout. When the design project is large, the design can be completed more efficiently.
General settings are:
Default line width.
Select and set up vias
Line width and color settings for important signals and power supplies.
Layer settings.
PCB Layout
The general layout is carried out according to the following principles.Reasonable division according to electrical performance.
Circuits that complete the same function should be placed as close as possible, and each component should be adjusted to ensure the most concise connection.
For components with large mass, the installation location and installation strength should be considered.
The heating element should be placed separately from the temperature sensitive element, and thermal convection measures should also be considered if necessary.
The I/O driver is as close as possible to the edge of the printed board and to the lead-out connector.
The clock generator should be placed as close as possible to the device that uses the clock.
A decoupling capacitor needs to be added between the power input pin of each integrated circuit and the ground.
When board space is tight, a tantalum capacitor can be added around several integrated circuits.
A discharge diode should be added to the relay coil.
Layout requirements should be balanced, dense and orderly.
Wiring
Routing is the most important process in the entire PCB design. This will directly affect the performance of the PCB board.
Carefully adjust wiring for optimum electrical performance. Next is beauty. If your wiring is messy, it will bring great inconvenience to testing and maintenance. The wiring should be neat and uniform, and not criss-cross without any rules.
Wiring optimization and silk screen
Silkscreen, be careful not to be blocked by the device or removed by vias and pads. At the same time, when designing, face the component surface, and the words on the bottom layer should be mirrored to avoid confusing the level.
Check
Before light painting, it needs to be checked, including the requirements of principle, design, production and other links.
Output Light Painting
Before the light-painting output, it is necessary to ensure that the veneer is the latest version that has been completed and meets the design requirements. The light-painting output files are respectively used for the board factory, the steel mesh factory to make the steel mesh, and the welding factory to make process documents.
Light Painting Review
After outputting the light painting, it is necessary to perform the light painting inspection.
4 DFM Problems in PCB Design
PCB Design
The design of the printed circuit board is based on the circuit schematic diagram to realize the functions required by the circuit designer.
The design of the printed circuit board mainly refers to the layout design, and the layout of external connections needs to be considered. Excellent layout design can save production costs and achieve good circuit performance and heat dissipation performance.
Acute Angle
Sharp angles are sharp or odd angles on copper components in a printed circuit board that can cause acid build-up during the PCB creation process. This problem occurs before the washing process, and the sharp angles cause residual acid to get trapped in these areas and not be able to be removed. Eventually, the copper components needed for the Gerber files contained on the board begin to corrode, causing the copper wires to “break” or disappear.
Copper Bar
The solder mask is very important for PCB design because the scribe lines of the etch traces are very fine and the pins are very closely spaced. The absence of a solder mask can result in large slugs of solder (especially between the pins) during assembly, which can lead to short circuits. In addition, it reduces the corrosion protection of other copper on the outer layer. To prevent these problems, it is important to check the alignment between the pad to the etch line and the outline, and the spacing between solder masks (sidebands). Also, make sure that the solder mask does not cover the pins – our board factory can advise the minimum sideband space and alignment allowed.
Radiator
A heat sink absorbs and dissipates heat from an electronic device through contact with a metal substrate or thermal interface material. If the flux opening in the heat sink is too large, it may cause the device to float off the pad once the solder paste melts. To prevent this, reduce the amount of solder paste you put on the heat sink – don’t use one large flux opening, instead, try dividing it into several smaller flux openings. This will help ensure that the device does not float and bump into other components during the baking process, avoiding short circuits.
Cold Solder Joint or No Solder Wire
It is critical to inspect vias within the pads – if the vias are not placed properly, it can cause solder paste to flow into the vias. This will result in cold solder joints or no real solder connection. We need to determine: the percentage of vias that are allowed in the pad before the vias are required to be plugged. Note: It is the holes in the vias that are causing the problem, not the pads in the vias.
Most software should be able to check for these issues, but if the software we’re using can’t, we have to manually check the design to make sure it meets assembly house standards.
How Are Components Selected?
Minimize the use of sockets as inductance is introduced. Some components have different packages. One type of component may support shorter circuit trace lengths than another.
The choice of components and the size of the PCB are interrelated. Therefore, the PCB footprint must be considered when choosing the right components for either a rigid or flexible PCB.
Component package shape should prioritize heat dissipation. The best way to dissipate heat is to place the power pads directly below the IC package that is connected to the internal plane. Even the smallest change in pad shape can tighten the routing and reduce connection length.
How to Accommodate Your Components in PCB Size?
Please start by drawing a basic PCB outline and drawing all components on the PCB. Make sure to use the actual or scaled size of the component or board to get a clear idea of the size and type of components that can be used. Some software even lets you view 3-D layouts.
Some parts may encounter height restrictions. Component height needs to be considered when selecting components.
The manufacturing process should be considered first when selecting components and designing the footprint. The best welding process should be considered.
Components will have to be selected according to the fixation process.
If there is no suitable prototype, the size can be customized.
Other Considerations
Other assembly details to keep in mind during the design phase include heating and cleaning. Make sure you know the maximum heat level for your components, whether they can be cleaned, and the type of assembly required. If hand soldering is to be done, the board design must include space for soldering tools.
Make sure your capacitors are all facing the same direction. This saves pick and place machine time during component placement.
Watch out for hot parts. The space around these components must be carefully inspected. Make sure the heat does not negatively affect any components or traces around them.
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