Electronics > Beginners

ENIG necessary for SMD?

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level6:
I read somewhere that for SMD components you really want to have ENIG pads, the reason being that ENIG is flatter than HASL. Is that really the case?

ataradov:
Depends on the complexity/price of the boards and your scale and the number of failures you are willing to accept. In small scale manufacturing it does not matter that much. if you are making iPhones, then it may make a huge difference.

Also depends on the size of components. For 0603 and up, it really makes no difference.

Psi:
Yes ENIG is flatter, and this good for really tiny stuff and BGAs but usually you don't *need* ENIG, it just makes the yields better.

For hand assembling hobby stuff using 0402 and TQFPs HASL is 100% fine.
If your doing some advanced hobby stuff with BGAs you might want to consider ENIG to make things easier for you, but it's still not needed.
Usually if you're working with big BGAs you can afford to pay a few extra dollar for ENIG.

Yansi:
Larger pitch BGAs work absolutely fine even with HASL.

HASL is a bit easier to handsolder too, from my experience.

JustMeHere:
I have no problem with HASL.  It might even make small components a bit easier.

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