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I have noticed that most of the boards with the white/silver finish are very easy to tarnish and then not so easy to solder
I dont think its all RoHS boards just the white/silver finish ones
I have a few boards that have become very difficult to get solder to flow properly and have resorted to a quick rub with some fine emery cloth gets it going again
I worry about the longevity of these boards and like to get them soldered ASAP
The boards from Oakley, JH and Bridechamber solder no problem and I believe they are all RoHS compliant
So I would vote for a different finish on the boards lead free HASL is quite good and solders more like normal lead boards with both RoHS and lead solder
----- Original Message -----From: Suit & Tie GuySent: Sunday, December 21, 2008 11:04 AMSubject: Re: [ModularSynthPanels] Re: LPG's
On Dec 20, 2008, at 3:39 PM, thomas white wrote:2oz copper - does if make any electrical difference insound? Does it last longer?it makes not a significant difference in sound or longetivity that i'm aware of.however i makes a huge impact on the reworkability. i've been using 2 oz copper process for 2.5 years now and have only lifted a trace once through rework. fyi: that module never shipped.the supplier i work with charges only a few pennies extra per board for 2 oz process. they are speedypcb.com, and are a broker for a chinese firm from the shipping cost and packing list that comes with the boards.
tin/lead finish - Have you had a problem with the RoHScompliant finish before?the problem is twofold. first i'm assuming some of the difficulty i'm having in soldering this comfortably has to do with the low trace weight. another is the lead-free finish. the other issue i have stuffing this PCB is the extremely small solder pads. i'm really not sure what is the biggest issue is, but i'm interested. the low trace weight should make "taking" the solder easier, however it makes me nervous to work with because i worry about damaging the board while soldering.i'm using a Weller WES51 with a ETH tip at 750 degrees farenheit. i moved to this tip because of the smallish pads on an early PCB which were corrected, and it's still large enough to make me freak out about how long it takes for this board to flow solder ... i worry about damaging the soldermask when i'm working with this board. i'm also open to criticism of my solder technique. i could just be a Mr Complainey Pants as i seem to be the only person whining.---Suit & Tie Guysuitandtieguy. comstgsoundlabs. com