Questions & Answers on PCB Assembly

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PCB Assembly

Editorial Team - PCB Directory

Sep 15, 2019

Surface mount in a PCB assembly means that each component on the PCB is mounted on the surface of the board. In the PCB Assembly process for surface mount components, solder paste is placed on the PCB board at areas where surface mount components will be placed on the board. PCB Stencils are usually used to apply solder paste on the PCB board and a pick and place machine is used to place SMT compo...read more

What is Through-hole PCB Assembly?

PCB Assembly

Editorial Team - PCB Directory

Jul 26, 2022

In through hole PCB assembly, the components are mounted on the PCB board by inserting their leads/terminals in holes that are already drilled through the PCB board. These terminals are then soldered manually or through reflow soldering to hold the component in place and connect it to the conductive path. One key thing to note about Thru-hole assembly is that it is not very efficient for multi-lay...read more

Handling PCB Rework Properly is Better Than Discarding Them

MOKOPCB - MOKO TECHNOLOGY LIMITED

Apr 21, 2020

In times of difficulty to obtain parts, increasing need for versatility and fast growth cycles, clean as well as affordable PCB remodel to conserve put together or bare printed circuit card are becoming increasingly essential. Every PCB or PCB setting up that can be fixed by rework safeguards our setting by not getting rid of it as well as by not having to generate new PCBs. Bauer Express PCBs hav...read more

What are Non-Plated Through Holes?

PCB Assembly

Editorial Team - PCB Directory

Jun 13, 2020

In through hole technology, the components are mounted on the PCB board by inserting their leads through the respective hole. These holes are called through holes since they are drilled from the top to the bottom of the board. Non-Plated/ Unplated Through Holes orNPTHs have no copper plating on the inner walls and thus provide no electrical properties. Such holes were implemented in single-sided P...read more

What is PCB Tombstoning?

PCB Assembly

Editorial Team - PCB Directory

Apr 24, 2020

PCB Tombstoning occurs due to a mismatch in the solder solidification time during the PCB assembly process. The term solder solidification or ‘Wetting’ comes in to the picture when surface mount components are soldered to their respective pads. To do so, solder is applied on the PCB board, after which the component is placed on the board and then passed through a reflow oven, where it ...read more

What are Castellated Holes on a PCB?

PCB Assembly

Editorial Team - PCB Directory

Jun 13, 2020

Castellated Holes or Castellations are indentations created in the form of semi-plated holes on the edges of the PCB boards. These Castellations help to mount one PCB board on top of another during assembly. Depending upon the application, instead of half holes, they may also look like a small or larger portion of a broken circle. Such holes are designed to provide proper alignment between the boa...read more

What are Plated Through Holes?

PCB Assembly

Editorial Team - PCB Directory

Jun 13, 2020

In through-hole technology, the components are mounted on the PCB board by inserting their leads through the respective hole. These holes are called through holes since they are drilled from the top to the bottom of the board. When using Plated Through Holes, as the name suggests, the inner wall of the holes is covered with a thin layer of Copper, which makes the entire inner hole area conductive....read more

What is SMT or Surface Mount Technology?

Editorial Team - PCB Directory

Aug 22, 2021

Surface Mount Technology (SMT) is an umbrella term that includes the methods of mounting and soldering electronic components directly onto the surface of a PCB. The components that are mounted can be resistors, capacitors, transistors, integrated circuits, etc., and these components are referred to as Surface Mounted Devices, or SMDs. SMD is an electronic device/component that can be soldered dire...read more

What is a Mixed PCB Assembly?

PCB Assembly

Editorial Team - PCB Directory

Sep 15, 2019

Mixed PCB assembly is the use of both Thru-hole and Surface Mount PCB Assembly techniques when populating a board. The requirement of mixed PCB assembly arises due to the fact that there are certain components which are not available in surface mount configuration. As a result of this, we use mixed PCB Assembly.

What is Automated Optical Inspection (AOI)?

PCB Assembly

Editorial Team - PCB Directory

Sep 15, 2019

Automated Optical Inspection (AOI) is a machine-based technique used to test and evaluate PCB boards for potential faults like surface defects, dimensional defects, and component placement defects. As circuits become more complex, it has become almost impossible to manually inspect the boards and thus AOI plays an important role in checking printed circuit boards after assembly. It helps to attain...read more

What are PCB Relays?

PCB Assembly

Printed circuit board (PCB) relays are small relay devices used for power management in control system designs. A PCB Relay protects the printed circuit board from high-voltage ESD or large current surges. These relays have high voltage ratings, and because of their size and weight, they are mounted to a printed circuit board as through-hole components.PCB Relays are available in variable types an...read more

Analysis of Optical Inspection of Soldering in PCB Assembly

PCB Assembly

Editorial Team

PCB Trace

An acute shortage of equipment for automatic control of electronic assemblies currently has led to a curbing of the development of the electronic industry. In this article, we will analyze the structure and functioning of modern optical inspections in Printed Circuit Boards. It discusses ways of improving the functional scheme of optical inspection are considered, and its main components and their...read more

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What is a Gerber Viewer?

PCB Assembly

Editorial Team - PCB Directory

Jan 17, 2023

A Gerber viewer is any software program that uses a comprehensive toolkit to read and examine Gerber files (GRB files). Some of these programs also function as the Gerber editor software, allowing you to view and edit Gerber PCB designs. The program can print the design and export the file viewer in a variety of formats, including SVG, PDF, PNG, PDF, JPEG, etc.While some of these programs must be ...read more

What is PCB Button Plating?

PCB Assembly

Editorial Team - PCB Directory

Apr 18, 2023

PCB Button Plating refers to the process of applying a thin layer of metal (typically gold or silver) onto the surface of the buttons or contacts of a printed circuit board (PCB). The purpose of plating is to improve the electrical conductivity and durability of the buttons or contacts, as well as to protect them from corrosion and wear.The manufacturing process of a rigid printed circuit board (P...read more

Cost Analysis of PCB Assembly

PCB Assembly

Editorial Team

Rush PCB Inc.

Manufacturing costs are always a major concern for OEMs. Printed circuit board or PCB assembly costs include the materials that go into fabricating them, the components mounted on them, and the expertise necessary to make them reliable and safe. In this article, Rush PCB analyzes the cost breakup of a PCB assembly, so that our customers can take more informed decisions.Factors Affecting PCB Assemb...read more

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Questions & Answers on PCB Assembly

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