Subject: | |
From: | |
Reply To: | |
Date: | Wed, 18 Aug 2010 10:50:12 -0500 |
Content-Type: | text/plain |
Parts/Attachments: |
|
|
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.
---------------------------------------------------
Technet Mail List provided as a service by IPC using LISTSERV 15.0
To unsubscribe, send a message to [log in to unmask] with following text in
the BODY (NOT the subject field): SIGNOFF Technet
To temporarily halt or (re-start) delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL or (MAIL)
To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest
Search the archives of previous posts at: http://listserv.ipc.org/archives
Please visit IPC web site http://www.ipc.org/contentpage.asp?Pageid=4.3.16 for additional information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 ext.2815
-----------------------------------------------------
|
|
|