Electronics Forum | Electrical Engineering Forum - PCBGOGO

E****son

How does double-sided SMT assembly work?

14 0 Jun 17.2022, 13:40:47

Hello everyone and welcome to this article. Today we are going to have a look at double-sided Surface Mount Technology (SMT) assembly and how it works. It is good to remember that Surface Mount Technology is used in attaching electrical components to a printed circuit board where the components are attached on the surface of the PCB without drilling holes. The components attached can be either leaded or non-leaded. Also, you need to remember that double-sided PCBs, are a type of board that provides both sides with conductive layers for the components. This means that both the bottom and the top layers have conductive paths. Both sides of the board have a covering of copper which acts as the current-carrying material. Now let us have a look at how the double-sided SMT assembly is done.What SMT assembly isSMT assembly stands for Surface Mount Technology assembly and it is classified as a type of soldering technology that employs the use of the reflow soldering technology or any other def...

C****les

When should you use heavy copper PCB?

24 0 Jun 16.2022, 14:08:22

Modern electronics gadgets employ the use of printed circuit boards as the most crucial component that has ensured that they perform effectively. Without the use of them, it is very difficult to achieve a better functioning electronic device. When you have compact and more durable printed circuit boards, you do not make your electronics devices heavy. Have a look at 98% of the hight-current systems available in the market and you will not miss an aspest of PCBs in them. From smartphones and tablets to 3D printing devices, they all have a printed circuit board in place.The printed circuit boards have traces and vias that make the interconnection of the components successful. Copper is the most employed element that ensures that the interconnection is achieved perfectly. Copper plays a great role in ensuring that the PCB can transfer signals from one component to the other. In this article we are going to have a longer discussion about this copper especially heavy copper soldered PCBs an...

z****lon

PCB layout experience sharing

27 0 Jun 15.2022, 16:02:22

In design, layout is an important part. The quality of the layout result will directly affect the effect of the wiring, so it can be considered that a reasonable layout is the first step to a successful PCB design.There are two layout methods, one is interactive layout and the other is automatic layout.Generally, it is adjusted by interactive layout on the basis of automatic layout. During layout, the gate circuit can also be redistributed according to the wiring situation, and the two gate circuits can be exchanged to make it the best layout for easy wiring.After the layout is completed, the design files and related information can also be returned and marked on the schematic diagram, so that the relevant information in the PCB board is consistent with the schematic diagram, so that the future filing and design changes can be synchronized. The information is updated to enable board-level verification of the electrical performance and functionality of the circuit.Common rules for wirin...

E****son

How does Functional Testing work in PCB Assembly？

26 0 Jun 06.2022, 10:04:49

In every industrial setup, some things define acceptable and nonacceptable behaviors. This could be defined in the requirement or functional specifications. It is a guide that explains what the user is allowed to do and how he can determine the system and application conformance to it. In addition, this could include the exact business scenario that should be validated. In these introductory remarks, it is good to take note that functional testing can be carried out by making use of these two well-known techniques:Requirement-based testing: this will entail all functional specifications that will form the foundation of all the other tests to be carried out.Business scenario-based testing: here it is done based on the information that is perceived from how the system will behave when it is ready for business or market point of view.The PCB design process involves several components that are required to achieve several functions. These components must be tested to ensure that they ach...

C****les

What Is Stiffener for Flex PCB?

34 0 Jun 02.2022, 17:55:07

Flex PCB is a patterned arrangement of printed circuits and components that makes use of flexible base material with or without a flexible cover layer. It can be bent, wound, folded freely, and withstand millions of dynamic bending without damaging the circuit. Flex PCBs are characterized by being soft, thin, and bendable. But they will be difficult to handle when certain thickness and hardness are required for component mounting and connection. Stiffeners are particularly used to reinforce a specific area of flexible circuitry. Benefits of Stiffener Stiffeners are attached to flexible boards for a variety of purposes. They are not a part of electricity circuitry but only provide mechanical support for the Flex PCBs. There are mainly two purposes as follows. 1. Improve the harness of the connection terminalsWhen the connectors are placed on the flex PCBs, the pads are easy to fall off after multiple insertions. The stiffener provides a certain degree of hardness and wo...

E****son

All About PCB Panelization

56 0 May 28.2022, 12:16:53

PCB panelization is to combine multiple separate circuit boards that share the same number of layers, thickness, and other parameters into one large board. In this way, a variety of boards can be produced at one time which speeds up the production and lowers the cost of PCB prototypes. Benefits of PCB panelization Improve the utilization rate of the boardGenerally, the copper-clad laminates used in PCB production are of fixed size. Rotating specially shaped boards from 90° to 180° and fitting them into the standard size panel can maximize space and reduce waste.Figure 1 PCB rotating in a panel Facilitate SMT assembly processIt is more effective to process multiple boards at once. Several boards into a panel increase the number of components for the placement, which also improves the efficiency of the Pick and Place machine. Types of PCB panelization V-cutV-cut is the most popular panel method for PCB manufacturing. It refers to a dividing line cut by a rotary cutter at a...

C****ian

The Control of Light and Moisture In PCB Factory

99 0 May 26.2022, 17:53:52

Some electronics hobbyists may have known how to make a custom PCB in-house. However, do you know how do printed circuit boards manufacture in streamlines or factories?PCB manufacturing is more related to chemical and photo-logy than physics. Most PCB manufacturers adopt the dry film developing technique to print circuits into the boards. They also use chemical reactions to electroplate vias and holes on the PCBs.What is Printed Circuit Boards?A printed circuit board (PCB) is the board base for physically supporting and wiring the surface-mounted and socketed components in most electronics. In applications where fine conductive traces are needed, such as computers, PCBs are made by a photolithographic process, in a larger-scale version of the way conductive paths in processors are made.Electronic components are typically placed by the machine onto a finished PCB that has solder joints in place. The PCB bakes in a reflow oven to melt the solder, which joins the connections. Most PCBs...

E****son

PCB Vias: Types, Design, Covering

137 0 May 25.2022, 15:38:16

Due to the miniaturization of electronic products and the increasing complexity of PCB design, multi-layer boards are widely used, of them vias are one of the important structures that establish connections between isolated copper layers. Types of vias Vias either serve as the electrical connection between layers or are used for fixing or positioning devices. There are three commonly seen vias: Through-hole, Blind via, and Buried via. Through-hole Through-hole is the most common type of hole which goes from one side of the circuit board to the other side. Through holes includes plated through holes (PTH) and non-plated through holes (NPTH). The way to distinguish them is to see if there is a layer of copper plating inside the hole wall. Vias are made by drilling. As the interior of the PCB is an insulating material, electroplating is applied to allow the electrons to move and conduct electricity. Figure 1 NPTH versus PTH The diameter of NPTH is usually larger than that o...

C****les

What is solder paste and how to print it on PCBs in SMT assembly?

228 0 May 21.2022, 11:13:37

Electronic devices are composed of separate components with different functions. By sodering these components to the printed circuit board and forming electrical connections, we can build many kinds of electronics products. Surface-mount technology (SMT) prevails worldwide in the PCB assembly process. Apart from the bare board and components, there are many important raw materials used in SMT assembly, and solder paste is one of them. The quality of the solder paste directly affects the soldering quality of the PCB and even the quality of the entire board, which has a significant impact on the reliability and service life of the final products. What is solder paste?Solder paste is used to solder electronic parts on the circuit board. It is one of the important materials indispensable to the progress of modern technology, which contributed to the miniaturization of Todays electronic devices. Solder paste is similar in shape to the toothpaste we use every day. It can stick the ...

C****ian

What is the difference between advanced PCB and standard PCB?

72 0 May 20.2022, 17:34:07

Printed circuit board is derived from the PCB (Printed Circuit Board), or also known as PWB (Printed Wiring Board). After the 1960s, various electronic and electrical products have been manufactured using electroplated through-hole circuit boards with heat-resistant and high dimensional stability substrates, which have developed rapidly and are still the main resin substrates. As the semiconductor technology developing to high-density structure, the component density also increasing, which formed the trend of advanced PCB. History of Printed Circuit BoardThe concept of laminate circuit board design has existed since 1967, but it was not until 1990 when IBM released SLC technology that microvia technology became practical. Before that, the industry to the full through-hole board, multiple lamination board to build a high wiring density. Due to the rapid progress in materials, photosensitive, thermopolymer insulation materials have been on the market, microvia techn...

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