What’s the Difference Between PCB Immersion Gold and Gold Plating?
PCB gold plating is different from immersion gold plating. In immersion gold plating, only the pads are covered in gold or nickel. It will not cause gold wires to run along the pads, but it will cause the copper layer to bond better with gold. This will cause a slight short. PCB gold fingers have a higher gold thickness.
Hard gold plating is better than soft gold plating
When deciding whether to use hard or soft gold plating for your PCBs, there are a number of factors to consider. The first factor is the metal’s melting point, which can be higher for hard gold than for soft gold. The other factor to consider is the type of environment the product will be exposed to.
There are also rules for plating PCBs with gold. If the PCBs don’t comply with these rules, they may fail to connect with the parent circuit board and may not fit in motherboard slots. To help prevent this problem, PCBs must be plated with gold alloy and adhere to the guidelines. Gold alloys are known for their strength and conductivity. They are also able to withstand hundreds of insertions and ejections without the contact material wearing away.
Another important factor is the thickness of the gold. The thickness of gold on a PCB must be minimal. Too thick or too thin will compromise functionality and cause an unnecessary increase in costs. Ideally, the gold on a PCB should be no more than a few microns.
Hard gold plating process is toxic
There is a good chance that the hard gold plating process is toxic, but there are still ways to make it more environmentally friendly. One way is to use organic addition agents, which are less toxic than cyanide. These compounds have the added benefit of producing thick, ductile deposits. They also have a lower toxicity level than cyanide and are more stable at pH levels below 4.5.
When gold is plated on copper, there is usually a barrier layer between it and the base metal. This layer is necessary to prevent copper from diffusing into the gold. Otherwise, the electrical conductivity of the gold would decrease dramatically and corrosion products would cover the gold surface. Nickel plating is the most common gold plating method, but if you have an allergy to nickel, you should avoid this process.
When comparing hard and soft gold plating, you should always consider the type of gold that you want to coat your products with. Hard gold plating will produce a much brighter finish, while soft gold will have a grain size similar to a fingernail. The soft gold finish will fade after time and may be better for less-handling projects. Hard gold, on the other hand, will stand up better to contact and may be better suited for projects that require a high level of visibility.
Hard gold plating process discharges chemical wastewater
The hard gold plating process involves the use of cyanide, a gold salt, to coat metal objects with a layer of gold. This process generates chemical wastewater, and it must be treated to comply with environmental regulations. Hard gold plating factories cannot operate without a sewage treatment license.
PCB gold fingers have a higher gold thickness
Gold fingers on PCBs are used for interconnection of various components. They are used for a variety of applications, such as the connecting point between a Bluetooth headset and a mobile phone. They can also serve as a connector between two devices, such as a graphics card and a motherboard. Since the technological advancement is increasing, interconnection between devices becomes more important.
Gold fingers on PCBs have slope edges, which make them easier to insert. They are also beveled, which turns sharp edges into slopes. The process of beveling is usually completed after the solder mask is disposed. Once beveled, the fingers snap into place more securely.
Gold fingers on PCBs are made with flash gold, which is the hardest form of gold. The thickness should be at least two microinches to ensure long-term working life. They should also be copper-free, as copper can increase the exposure during the beveling process. Gold fingers may also contain five to ten percent cobalt, which increases the rigidity of the PCB.