Jack, what the line and spacing of the board? Is it HDI?
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Sent using BlackBerry
----- Original Message -----
From: Bev Christian [mailto:[log in to unmask]]
Sent: Wednesday, August 18, 2010 11:53 AM
To: [log in to unmask] <[log in to unmask]>
Subject: Re: [TN] Matte Mask and SolderBalls
Jack,
NOT a boring subject. I am just surprised that your board supplier doesn't have a single matt finish solder mask in production. THAT is strange, to my mind anyways.
Bev
RIM
-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Jack Olson
Sent: Wednesday, August 18, 2010 11:50 AM
To: [log in to unmask]
Subject: Re: [TN] Matte Mask and SolderBalls
That's what seems so strange to me.
Everyone lists plenty of advantages for matte mask, no one presents any
downside to using them (except personal preference for shiny boards in
marketing photos?) and yet the fabricators don't have them, at least not
without costly change-overs and extra processing. I still think I must be
missing something....
oh well, sorry to clog the TechNet with a boring subject,
Jack
.
On Tue, 17 Aug 2010 09:56:30 -0500, Nigel Burtt <[log in to unmask]>
wrote:
>Matt soldermasks in my experience always reduced the incidence of solder-
>balls at wave and selective solder when we could alter from semi-gloss or
>glossy. They also helped reduce the incidence of stubborn PCB design
feature-
>related solder bridges. With no-clean fluxes, the residues are often less
>obviously visible too. A side benefit is that operators working on the PCBs
>especially for any close visual inspection will experience less eye-
strain/fatigue
>than with shiny/glossy boards.
>
>PCB suppliers usually want to stick with a limited number of different masks,
>preferably one, throughout their factory. So to change for you will require
>some leverage to other customers, or extra cost.
>
>One response might be... OK the PCB supplier wants to charge an extra 3%
>but we save 3+x% in rework costs and improved operator health benefits,
>meanwhile we work on the supplier to move to our preferred mask at 0% cost
>increment.
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