Design Con 2015

What Buyers Must Know About PCB Surface Finishes

NO RATINGS
View comments: newest first | oldest first | threaded
Michael Allen
User Rank
Blogger
Re: Re : What Buyers Must Know About PCB Surface Finishes
Michael Allen   8/1/2014 10:01:40 AM
NO RATINGS

No, size does not matter.

tirlapur
User Rank
Supply Network Guru
Re : What Buyers Must Know About PCB Surface Finishes
tirlapur   7/28/2014 3:55:40 PM
NO RATINGS

@Michael: ENIG seems to be a great surface coating for PCBs, but is there a surface coating policy for different sizes of PCBs?

tirlapur
User Rank
Supply Network Guru
Printed Circuit Boards
tirlapur   7/28/2014 3:54:31 PM
NO RATINGS

The return of investment for using higher material board surface finishes is greater than using cost-effective surface finishes, but only until the growth curve reaches the saddle point. If we are talking about PCBs in a yearly updating technology (like motherboards etc.) then using high density surface finishes will reduce the profits of the company, as these low maintenance surface finishes last at least 2 years but for an annually changing technology, this is simply not needed.

docdivakar
User Rank
Stock Keeper
Immersion Tin
docdivakar   7/22/2014 3:40:23 PM
NO RATINGS

Regarding Immersion Tin, one needs to be careful about PCB floor planning. Under certain conditions, Tin Whiskers can pose a big headache via shorting. Additives to Tin as well as stress relieving can lessen the potential for Whisker growth, see:

http://www.atotech.com/data/publications/pcb/Immersion_Tin-Kinetics_of_Whisker_growth.pdf

MP Divakar



More Blogs from Michael Allen
When designers don't know or care about manufacturing, they build in costs that buyers can't take out. This can be changed.
Using a contract manufacturer's in-house design team, rather than a standalone design firm, can improve both design and manufacturing.
When you outsource PCB assembly, here’s what you need to ask your EMS partners about ESD protection for your boards during production.
By adapting the solder process to each unique board design, rather than using a handful of "one-size-fits-most" thermal profiles, EMS partners can deliver higher yields and lower costs to OEM buyers.

Datasheets.com Parts Search

185 million searchable parts
(please enter a part number or hit search to begin)
EBN Dialogue / LIVE CHAT
EBN Dialogue enables you to participate in live chats with notable leaders and luminaries. Open to the entire EBN community of electronics supply chain experts, these conversations see ideas shared, comments made, and questions asked and answered in real time. Listed below are upcoming and archived chats. Stay tuned and join in!
Archived Dialogues
Live Chat 11/12: Examining the Cyberthreat to Supply Chains
The number of cyberattacks is on the rise and hackers are targeting the supply chain. Drew Smith, founder and CEO of InfoArmor, will be on hand to discuss the reality of today's threat landscape and what to do about it.
Live Chat 11/06: Enterprise Risks, Intellectual Property & Supply Chains
Enterprise risk management (ERM) frameworks can be useful to identify, assess, and manage intellectual property (IP) risks that arise in supply chain compliance. We'll look at real-world examples and strategies for mitigating those risks.
Latest Poll
EBN Newswire
SINGAPORE AND SAN FRANCISCO   11/20/2014
Menlo Logistics Keen to Build on 2014 Growth in South Asia
Twitter Feed
EBN Online Twitter Feed