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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 PCB Test points?

Editorial Team - PCB Directory

Aug 20, 2022

A test point in a PCB is an exposed copper pad that can be used to check whether a circuit is functioning to specification. During production, users can inject test signals via probes through the test points to detect potential issues. The test signals output determines if a given signal is low/high when compared with the desired result and optimal changes can be made to achieve the same.The PCB T...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 Solder Dewetting?

PCB Assembly

Editorial Team - PCB Directory

May 2, 2023

Proper soldering techniques are essential to creating electronic devices that function properly. In the electronics industry when a PCB is manufactured, the immediate next step is to solder all the electrical components like resistors, capacitors, and many other components to the PCB traces. However, sometimes the process doesn’t go as planned and which eventually leads to soldering issues a...read more

Understanding the PCB Requirements for Automotive Applications

PCB Assembly

Editorial Team - PCB Directory

Jan 12, 2024

The automotive industry is undergoing a transformative shift towards advanced technologies, with electronic components playing a central role in shaping the future of vehicles. As automobiles become increasingly sophisticated, the reliance on Printed Circuit Boards (PCBs) has grown exponentially. From powering safety features to facilitating communication systems and enabling advanced driver assis...read more

What are the PCB Design Considerations for Cryogenic Applications?

PCB Assembly

Editorial Team - PCB Directory

Jan 4, 2024

Cryogenic applications involve the utilization of extremely low temperatures, typically below -150°C or -238°F, for various scientific, industrial, and technological purposes. These environments pose unique challenges and necessitate specialized approaches, particularly in the design of printed circuit boards (PCBs). As the backbone of electronic systems, PCBs play a pivotal role in ensuri...read more

What is Solder Paste Inspection (SPI) Equipment in PCB Fabrication?

Editorial Team - PCB Directory

Mar 4, 2024

Solder Paste Inspection (SPI) Equipment is a critical component in the electronics manufacturing process, playing a pivotal role in ensuring the quality and reliability of electronic assemblies. This equipment is designed to inspect and verify the precise deposition of solder paste onto printed circuit boards (PCBs) during the surface mount technology (SMT) assembly process.Understanding Solder Pa...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

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

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 are Solder Paste Dispensers?

Editorial Team - PCB Directory

Dec 26, 2023

A solder paste dispenser is a specialized device employed in electronics manufacturing, designed for the precise and controlled application of solder paste onto electronic components. It plays a crucial role in the soldering process by ensuring accuracy and repeatability in the deposition of solder material.Importance in Electronics Manufacturing:In the realm of electronics manufacturing, the sold...read more

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 Dry Cabinets in PCB Manufacturing and Assembly?

Editorial Team - PCB Directory

Dec 21, 2023

Dry Cabinets are specialized cabinets used in PCB manufacturing and assembly that are designed to create and maintain low-humidity environments, safeguarding electronic components from the detrimental effects of moisture. By maintaining optimal humidity levels, dry cabinets play a crucial role in enhancing the quality, reliability, and overall performance of electronic devices.Electronic component...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 are Some Common PCB Problems and Circuit Board Issues?

Editorial Team - PCB Directory

Jul 14, 2023

Printed Circuit Boards defects are minor or major errors in PCBs that can hinder their electrical efficiency and mechanical strength. There are multiple factors that contribute to defects in PCBs and a manufacturer should be aware of them to protect the production of their PCBs from any manufacturing or assembly hazard.In this article, we will go through an in-depth analysis of some of the most co...read more

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