What is HASL plating?

HASL / Lead Free HASL HASL is the predominant surface finish used in the industry. The process consists of immersing circuit boards in a molten pot of a tin/lead alloy and then removing the excess solder by using ‘air knives’, which blow hot air across the surface of the board.

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.

Is HASL lead free?

It doesn’t use Tin-Lead solder. Instead, Tin-Copper, Tin-Nickel or Tin-Copper-Nickel Germanium may be used. This makes Lead-Free HASL an economical and RoHS compliant choice.

How is solder Levelling carried out?

Coating is achieved by dipping a circuit board into a molten bath of eutectic solder. Follow- ing this, a leveling process, using either an impinging spray of leveling fluid or a hot air blast, removes the excess solder and clears the component holes.

What does hasl stand for?

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.

Does PCB contain gold?

Gold is an important element in the design of printed circuit boards, and looking closely at most PCBs will reveal that the ‘fingers’ on the board include metal contacts fabricated from gold.

Is ENIG better than HASL?

Choosing ENIG over HASL, reduces the use of lead and emission from flux and fusing oil. HASL has a excellent solder-ability and has a good shelf life. ENIG has excellent corrosion resistance, it is good for aluminum wire bonding, excellent for fine-pitch technology, excellent solder-ability and excellent shelf life.

What does HASL stand for?

Is HASL with lead bad?

Lead in HASL is harmful to humans, but lead-free not. The lead eutectic temperature is lower than lead-free, which depend on Lead-free alloy composition. For example, The eutectic of SNAGCU is 217 degrees, the pcb soldering temperature is eutectic temperature plus 30 to 50 degrees.

What is OSP material?

Organic solderability preservative or OSP is a method for coating of printed circuit boards. It uses a water-based organic compound that selectively bonds to copper and protects the copper until soldering. The compounds typically used are from the azole family such as benzotriazoles, imidazoles, benzimidazoles.

What is surface finish in PCB?

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 OSP finish?

OSP (Organic Solderability Preservative) OSP is a water-based, organic surface finish that is typically used for copper pads. It selectively bonds to copper and protects the copper pad before soldering. OSP is environmentally friendly, provides a coplanar surface, is lead-free, and requires low equipment maintenance.

What is HASL-hot air solder leveling?

HASL (Hot Air Solder Leveling) is a metallic surface finishing technique, which is performed on the outermost layer of the PCB board to protect the exposed copper surfaces like tracks until the component placement and soldering is completed.

Is it OK to use HASL on SMT?

Recent fundamental changes in the PCB industry, such as new more complex surface mount technology (SMT), have revealed HASL’s shortcomings. HASL is not suitable for use with fine-pitch SMT PCB Assembly due to uneven surfaces being incompatible with fine pitch components.

Is it OK to use HASL finish on PCB?

While a surface finish may be low cost and robust, fundamental changes in the PCB industry—namely, the rise complex surface mount technology—have exposed its shortcomings. HASL leaves uneven surfaces and is not suitable for fine pitch components.

What’s the difference between Enig and Hasl surface finishes?

A layer of gold protects the nickel during storage. ENIG is an answer to major industry trends such as lead-free requirements and rise of complex surface components (especially BGAs and flip chips), which require flat surfaces.

By Lifehacks

What is hasl plating?

HASL / Lead Free HASL HASL is the predominant surface finish used in the industry. The process consists of immersing circuit boards in a molten pot of a tin/lead alloy and then removing the excess solder by using ‘air knives’, which blow hot air across the surface of the board.

What is OSP plating?

Organic solderability preservative or OSP is a method for coating of printed circuit boards. It uses a water-based organic compound that selectively bonds to copper and protects the copper until soldering. The compounds typically used are from the azole family such as benzotriazoles, imidazoles, benzimidazoles.

Which surface finish is best for PCB?

The PCB surface finish with ENEPIG is very thin (between 0.05μm and 0.1μm), making the assembly and soldering process very simple and definitely more reliable when compared to ENIG….Applications of ENEPIG.

Applications ENEPIG
Flip Chip Yes
High Reliability High
RoHS Compliant Yes
Solder Joint Integrity Good

What is the disadvantage of PCB?

Disadvantages of PCB : Uneven PCB surfaces finish. Not good for fine-pitch. It contains lead. Thermal shock.

What is OSP finish in PCB?

OSP (Organic Solderability Preservative) OSP is a water-based, organic surface finish that is typically used for copper pads. It selectively bonds to copper and protects the copper pad before soldering. OSP is environmentally friendly, provides a coplanar surface, is lead-free, and requires low equipment maintenance.

Why gold is used in circuits?

One of the reasons why is used in electronics is because of its electrical conductivity properties. Gold is highly conductive, meaning electricity can easily flow through it with minimal resistance. When used in electronics, gold allows electricity to flow to and from the respective device with minimal resistance.

Why would someone create a PCB?

Advantages of Designing a Custom PCB When you design a custom PCB, you have control of the location of every piece of copper down to a few thousandths of an inch. This control allows you to more easily mitigate parasitic properties of your circuits.

What’s the difference between Enig plating and Hasl plating?

With ENIG, the surface finish is always smooth thanks to its double-layer metallic coating with nickel. It also sums up a protective barrier to the copper circuits and the surfaces on which you solder the components. The layer of gold always protects the nickel during storage. HASL has board thickness up to 200 mils.

Is it OK to use HASL finish on PCB?

While a surface finish may be low cost and robust, fundamental changes in the PCB industry—namely, the rise complex surface mount technology—have exposed its shortcomings. HASL leaves uneven surfaces and is not suitable for fine pitch components.

What are the different types of PCB finishes?

Below are 5 types of PCB surface finishes, along with their benefits and drawbacks. Finish Type #1 – Hot Air Solder Leveling (HASL) “Hot Air Solder Leveling” is the least expensive type of PCB surface finish. It is widely available and very economical. The board is dipped in molten solder and then leveled off with a hot air knife.

What do you need to know about PCB plating?

PCB Plating can be described in two ways. 1. Surface plating or finishing: This involves the process of covering surface copper traces, protecting them against elements such as oxidation, contamination and moisture. Surface plating is essential to be a sturdy base for soldering components when assembling PCBs.

By Guidelines