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What is a PCB Prototype?
07/25/2022 at 08:28 • 0 commentsPCB prototype refers to the trial production of printed circuit boards before mass production. After the electronic engineer completes the PCB circuit design, the process of small batch trial production to the PCB factory is the so-called “PCB prototyping”
The printed circuit board (PCB) is the foundation of every electronic device in the world today. The versatility of high-tech products determines the complexity and high performance of the PCB.
The PCB prototype is an indispensable step before a new product enters mass production. The PCB prototype can correct design defects and improve design performance at a lower cost and faster speed. In addition, it helps to avoid more problems and reduce risks in mass production. Below JHD will walk you through everything you need to know about PCB prototyping.
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What Does PCB Testing Check?
07/25/2022 at 08:27 • 0 commentsThe purpose ofPCB testing and inspection is to check whether the PCB conforms to standard printed circuit board performance. Ensure that all PCB manufacturing processes are functioning properly to project specifications and are free of any defects.
A PCB consists of different components and assemblies, each of which affects the overall function of an printed circuit board. These elements are analysed in detail to keep PCB quality well. The test content to be performed should include the following checks:- Lamination: Lamination quality is critical to the longevity of a PCB. Peeling laminate can directly cause problems with board functionality. Typically, lamination tests are used to test the resistance of laminates to peeling by force or heat;
- Pore Wall Quality: Pore walls are typically analyzed in environments with cycling and rapid temperature changes to understand how they respond to thermal effects. Make sure that the hole walls do not crack or delaminate when the PCB is put into service.
- Copper Plating: The copper foil on the PCB is attached to the PCB board to support conductivity. Test the quality of copper, detailed analysis of tensile strength and elongation.
- Cleanliness: The cleanliness of a PCB is a measure of the board’s ability to withstand environmental factors such as weatherability, corrosion and humidity.
- Solderability: Materials are tested for solderability to make sure that components can be fixed stably to the board and prevent soldering defects in the final product.
- Electrical Testing: Conductivity is essential to any PCB, and the ability to measure the minimum leakage current of a PCB is essential. For detailed electrical testing content and methods, please refer to “Comprehensive Understanding Of PCB E-Testing“.
- Cleanliness: The cleanliness of a PCB is a test of the board’s ability to resist environmental factors such as corrosion and humidity.
- Environmental Testing: This is a performance and quality change test for the PCB to run in a humid environment. A weight comparison is usually made before and after placing the PCB in a wet environment, and a significant weight change is considered a rejection.
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What Is A Flexible PCB?
07/25/2022 at 08:25 • 0 commentsAs the name suggests, flex circuits is a bendable PCB, which is used in some products that require a PCB that can be bent. Similar to the structure of rigid PCB, the flexible board uses a layer of PI (Polyimide) with high temperature resistance and good dielectric layer as the base material, and then uses the adhesive layer of Epoxy to bond the copper foil layer on the top layer. If it is a double sided flexible PCB, the upper and bottom layers of copper foil need to be bonded.
For more PCB substrate properties, please refer to “Introduction To The Material Properties Of PCB CCL” -
What is a Rigid Flexible PCB?
07/25/2022 at 08:17 • 0 commentsRigid-flex PCB is a special circuit board made by pressing a rigid circuit board (PCB) and a flexible circuit board (FCB). The rigid pcb part usually choose fr4 material and the flex pcb part is polyimide. The flex-rigid board combines the advantages of the rigid characteristics of rigid PCB and the flexible characteristics of flexible PCB, so that the PCB is no longer in two-dimensional space, but is folded by three-dimensional internal wiring and arbitrary bending. In this way, the rigid-flex board can realize complex circuit layout in a small space. And it has the characteristics of light weight and small size, which is suitable for some fine electronic products.
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What PCB Silkscreen And Design Considerations.
07/25/2022 at 08:13 • 0 commentsA printed circuit board (PCB) design has many different layers, and silkscreen is the topmost layer of a printed circuit board (PCB) and often occurs as the last step in the printed circuit board manufacturing process. As the pcb screen printing must be printed on the PCB surface, each PCB has two silkscreen layers layers at most,on the top side and the bottom side. In order to provide reference marks for components on PCB.
It is a non-conductive epoxy ink, which is a specially formulated ink. Its common color is white color, besides there are other pcb silkscreen colors of yellow, blue,black,red and so on.
Silk screen printing is a layer of oil traces which used to spot component parts, testing points, PCB elements, warning sign, signs and tabs.Useful information for specifying PCB boards to help manufacturers and engineers locate and identify all components during assembly. It is used to pick out elements values, PN numbers,test points, etc.