What is ENIG in PCB manufacturing?
Electroless nickel immersion gold (ENIG or ENi/IAu), also known as immersion gold (Au), chemical Ni/Au or soft gold, is a metal plating process used in the manufacture of printed circuit boards (PCBs), to avoid oxidation and improve the solderability of copper contacts and plated through-holes.
What is PCB surface finish?
A PCB surface finish is crucial for a printed circuit board as it prevents the copper (exposed traces, pads, holes and ground plains) from oxidation – a critical ingredient to high-level application performance. A surface finish is essential for making a reliable connection between the PCB and the electronic component.
What is the difference between ENIG and HASL?
HASL is generally preferred for hand-soldering due to the easy joint formed. However, HASL leaves an uneven surface despite the leveling process. ENIG, on the other hand, provides for a very flat surface making ENIG preferable for fine pitch and high pin count components especially ball-grid array (BGA) devices.
What is HASL finish PCB?
HASL or HAL (for hot air (solder) leveling) is a type of finish used on printed circuit boards (PCBs). The PCB is typically dipped into a bath of molten solder so that all exposed copper surfaces are covered by solder. Excess solder is removed by passing the PCB between hot air knives.
Is Enig a RoHS?
ENIG PCB finish is a double layer metallic coating with nickel that acts both as a protective barrier to the copper circuits and a surface on which the components are welded. A layer of gold protects nickel during storage. Enig is Rohs compliant and people tend to use the tersm together.
Is Enig conductive?
excellent electrical conductivity, anti-oxidation & anti-rust, good heat dissipation, higher surface thickness.
Is Enig lead free?
ENIG. ENIG is short for Electroless Nickel/Immersion Gold and its structure is displayed below. As a lead-free surface finish, ENIG features some obvious ADVANTAGES, including long storage time, excellent solderability and flat surface.
Is Enig a Rohs?
Is ENIG lead free?
Is ENIG conductive?
Which surface finish is best for PCB?
Immersion silver is a non-electrolytic chemical finish applied by immersing the copper PCB into a tank of silver ions. It is a good choice finish for circuit boards with EMI shieldingand is also used for dome contacts and wire bonding. The average surface thickness of the silver is 5-18 microinches.
Why choose Enig finishes for PCB fabrication?
During PCB fabrication, each aspect is essential. The placement of wires, finishing touches, and the PCB’s overall design determine the proper functioning of the board. Regarding surface finishes, ENIG finishes are becoming favorites because of their good electrical performance.
What are the characteristics of ENIG PCB pads?
Initially, the copper pad is covered by a Nickel (Ni) layer followed by a thin immersion Gold (Au) layer. ENIG provides good oxidation resistance, excellent surface planarity and allows for easy soldering which results in excellent electrical performance of the PCB board.
What is ENIG finish?
ENIG is one of the most made surface finishes by PS Electronics, the services contain custom gold thickness, selective gold plating, etc. If any issues about ENIG, just contact us to get it through.
What is Enig plating?
Electroless nickel immersion gold ( ENIG) is a type of surface plating used for printed circuit boards. It consists of an electroless nickel plating covered with a thin layer of immersion gold, which protects the nickel from oxidation.