Golden fingers are one of the surface processes of PCB. PCB gold fingers can be divided into ordinary PCB gold fingers (flat fingers), segmented gold fingers (discontinuous gold fingers), and unequal length gold fingers (curved gold fingers). The specific PCB gold fingers are as follows:

Neatly arranged at the edge of the PCB, with the same length and width as the rectangular solder pads.

Rectangular solder pads have different lengths at the edges of the PCB and the front end has already been disconnected.

Rectangular pads are located at the edges of the PCB, but with different lengths.

Perhaps you have this question: "Why do PCBs need to have different lengths of gold fingers?" Let's take a look at the reasons below.

Ensure that the PCB can be properly inserted into the corresponding slot in the device.

Realize reliable electrical connections between PCB and other device components.

Try to minimize the resistance on the signal path to reduce noise and interference that may cause errors or malfunctions during operation.

Allow PCB to be securely connected to other PCBs within the same system, thereby achieving efficient data transmission between different boards when necessary.

Compared to copper or aluminum contacts used in certain PCB connectors, gold has superior corrosion resistance, thereby improving the durability of PCB connections.

After the gold plating is completed, the wires are removed by milling and etching, but the products made by this process will have residual leads around the PCB gold fingers inside the PCB board, causing exposed copper, which cannot meet the requirement of not allowing exposed copper.

However, the leads of the inner or outer circuit of the PCB connected to the gold finger have been electroplated with gold fingers, so copper exposure around the gold finger should be avoided. But when the circuit density is high, the circuits inside the PCB are very few and dense. So using this technology will not keep the leads inside the circuit layer; This technology is powerless to isolate the golden finger (which is not connected to any circuit).

Some customers need to add side edges to all four sides, including the PCB gold finger part of the panel. This is also possible, but some manufacturers are unable to achieve it. At Haibo, we can do very well.

The standard splicing method for hard gold PCBs is back-to-back splicing, with the PCB's gold fingers facing outward, which makes production more convenient. Generally, this method does not add edge strips at the position of the gold fingers.

Gold finger leads are used to connect PCBs and other electronic components. They provide electrical connections between the circuit board and its external environment.

Golden fingers can be used as connectors for various devices, including computers, mobile phones, DVD players, printers, household appliances, etc. Gold plated contacts can also reduce corrosion caused by oxidation. Gold finger leads can provide better signal integrity for high-speed data transmission.

Therefore, the gold finger lead is an essential component for any device that needs to be connected to a PCB. It also provides reliability, durability, and cost-effectiveness for any OEM application.

Cut off the golden finger lead diagonally to obtain neat golden fingers.

When processing gold finger leads of different lengths, a secondary etching process is usually required. Simply put, the first etching process is to etch the circuit of the PCB, then cover the circuit area with a dry film or peelable blue photomask, gold coat the gold finger area near the gold finger lead, cover all areas except for the gold finger lead with a dry film, and finally perform a second etching on the PCB gold finger lead.

If pursuing cost-effective FPC manufacturing services, choosing a Chinese manufacturer is the best choice. As a manufacturing powerhouse, China has abundant resources, cheap labor, and a large number of technical personnel. We recommend Haibo, a Chinese FPC assembly service provider with over 10 years of experience, who has performed outstandingly in various aspects

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