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Everything That You Need To Know About Pcb Gold Fingers

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By Author: Ryan
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PCB gold fingers

We all are familiar with the interconnections among different devices in today’s technology-based world. Gold finger PCB is liable for all these connections no matter whether it is the connection between your laptop and your mobile or the connection between your mobile and Bluetooth headset. There are no other options apart from gold fingers PCBs in connecting the motherboards of two different devices through signals. The importance of creating interconnections among different devices is increasing due to the up-gradation of the technology. Naturally, the significance of PCB gold fingers is only going upwards.

When you observe the structure of a PCB or printed circuit board, you will only find tiny columns in the circuit board’s connective edge. Generally, the plating of tiny columns is done with gold, and this is why we call those columns PCB gold fingers. The main use of PCB gold fingers started for connecting secondary PCBs to the motherboards of computers. However, there is ...
... no such rule that PCB gold fingers will only be used in computer CPUs. Today you will find that for connecting other devices like smartphones and smartwatches gold fingers are used. Here we will discuss the types and benefits of PCB gold fingers.

PCB gold finger beveling

The beveling process completes the surface finish in the case of PCBs or printed circuit boards. After completing the disposition of solder masks, the beveling process of the gold fingers of a PCB gets initiated. In terms of making insertions quicker and more effortless the process of PCB gold finger beveling is unavoidable. Insertions will be more difficult than usual unless and until the gold finger beveling is completed.

You need to know which angle you are supposed to bevel the edges after learning about the beveling process. Usually, to ease up the particular slot’s insertion process PCB gold fingers are beveled at angles of 30 or 45 degrees. However, according to the requirements of the clients, engineers, and technicians bevel PCB gold fingers. On the size of a particular circuit board, the beveling angle of gold fingers depends.

Design specifications for PCB gold fingers

PCB gold fingers also consist of specific designs and specifications like other technical devices and circuit boards. For plating gold PCB, the following given points will discuss the design specifications. These points will better design the gold fingers in case you are attempting to create a complete circuit board.

You have to make sure that the inner layers of the PCB are copper-free. During the process of beveling the presence of copper in the inner layers of the PCB can generate excess exposure. We do not expect additional exposure during beveling. Therefore, the inner layers of the PCB don’t use copper materials.

Every PCB has PTH or plated through holes, and those holes should be posited carefully. Within a 1 mm area of the gold fingers, the plated through holes of a PCB shouldn’t be posited.

You will find the main board outline if you carefully observe the PCB. There should not be any association between the board outline and the gold fingers, and between the gold fingers and the board outline, there must be a gap of 0.5 mm.

There are standard spacing guidelines given, and violation of these guidelines may lead to a malfunction. To avoid any kind of malfunctions the design of a gold-plated circuit board must follow these guidelines.

Each and every PCB includes solder masks and screen printings all over. But technicians and engineers need to keep one thing in mind no solder mask or screen printing should be nearby the gold fingers. The advice regarding the usage of a PCB that has screen prints or solder masks near the gold fingers is not given anymore.

A technician needs to remember that the gold fingers shouldn’t be facing the center of the PCB during setting the design of a PCB. While creating the design of a PCB it is one major thing that has to be followed.

PCBs with segmented gold fingers

Here you will find that the sizes of a particular PCB’s gold fingers may differ from each other. In water-resistant electronics, the usage of this kind of PCB is mainly observed.

PCBs with non-inform gold fingers

These PCBs include gold fingers that are shorter compared to the standard size. Mainly in memory card readers, you will come across these kinds of gold fingers.

PCB gold fingers Quality measures

Every electronic circuit has to be tested before there is any type of input inside a particular device. There is a need for such a circuit board has to go through various performance checks and quality measures. We are going to mention some quality measures of PCB gold fingers in the following portion.

The gold plating of a PCB’s gold fingers should include 5-10% cobalt mandatorily. There has to be a certain amount of cobalt in the gold plating that will allow the gold fingers to gain the expected rigidity.

When it comes to the thickness of the gold fingers there is a strict guideline. According to the guideline, the thicknesses of the gold fingers of a PCB have to be between 2-50 microinches.

Apart from the above quality measures, to judge the quality of the gold fingers of PCB visual tests are also performed. The gold fingers of a PCB should be smooth, clean, and there has to be no additional nickel-plating. With magnifying glasses, the visual inspection is generally performed.

To measure the quality of circuit board fingers these are procedures, and these techniques are used to detect whether the PCB is useful for inserting into a device.

Gold fingers revolution

As mentioned above, for better connectivity the interactions between the circuit boards and motherboards of different devices are necessary. With the ongoing rapid development in technology, smartphones, PCs, and other devices have become faster and more advanced. The importance and significance of PCB gold fingers are increasing with the technology and connectivity that are getting smarter. Gold-plated circuit boards have made the technology as smart as it is today. Technology keeps getting more improved and faster with the advancement of time. It is happening due to the improved versions of gold-plated circuit boards. Insertion and ejection have become easier and faster due to the gold fingers of a circuit board. Starting from smartphones to other smart devices, everything is dependent on the functions of the gold fingers. One thing that can take the improvement of smart technology to the next level is the advancement of gold finger PCB and the enhancement in their performances. The performances of printed circuit boards of different devices are enhanced by the advanced and improved versions of gold fingers. Hence it can be said that for the incredible up-gradation of smart technology the gold fingers are liable, and it is changing the global digital trend effectively.

More About the Author

High Quality PCB Co., Limited is a leading PCB(Printed Circuit Board) Manufacturer in China since 1995. Dedicated to the technologies innovation, being engaged in IC Substrates, High-Density Interconnect PCB, Multi-layer PCB, Rigid Flexible PCB, Flexible, Radiofrequency PCB.

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