Looking for info about PCB finishing process

[jayasuryan]

Hello All............

Anyone know about PCB finishing process?
Plz its very urgent....

Thanks in advance.........

 

[kender]

pcb finish

This chart might help: **broken link removed**

 

[Rame]

finishing pcb

Hi,

Check the below link,it will help you...

https://www.smtnet.com/library/index.cfm?fuseaction=view_article_html&file=no_hasl


Regards,

Ramesh

 

[v_kumar]

finish pcb

you can go through the book by COOMBS

Printed circuit board - coombs

i am attaching here with the summary of types of surfaces finish

Thanks

 

[jayasuryan]

pcb finish types

Thanks all.......It really helped me a lot

 

[flypcb]

types of pcb finish

HASL - cheapest but with environment harmful, basiclly forbidden in US and Euro markets.
OSP - cheaper one with short deposit time
Immersion Tin, Silver - Cheap with reasonable deposit time
Immersion Gold/ENIG - Not cheap but with very good hardness and quality, adequate for most cases
Electrolytic Gold - high price with best quality, merely used for gold finger basically

To save money, some buys choose OSP + selective ENIG, for one side osp save lots of money, for the other side, selective ENIG can protect some import and unwearable parts

 

[House_Cat]

sn100c finish pcb

LFH (lead free hot air leveling) replaces HASL as a cheap PCB finish. It is exactly the same process as HASL - it just uses lead free solder alloys instead of leaded solder.

You can read about it here: http://www.rohmhaas.com/electronicmaterials/CBT/vol5/papers/Leadfree_solder.pdf