TECHNET Archives

September 2010

TechNet@IPC.ORG

Options: Use Monospaced Font
Show Text Part by Default
Show All Mail Headers

Message: [<< First] [< Prev] [Next >] [Last >>]
Topic: [<< First] [< Prev] [Next >] [Last >>]
Author: [<< First] [< Prev] [Next >] [Last >>]

Print Reply
Subject:
From:
Guy Ramsey <[log in to unmask]>
Reply To:
TechNet E-Mail Forum <[log in to unmask]>, Guy Ramsey <[log in to unmask]>
Date:
Thu, 2 Sep 2010 11:24:36 -0400
Content-Type:
text/plain
Parts/Attachments:
text/plain (154 lines)
There is a local OEM of solar powered highway signs. They order black mask.
The black mask is what we see as we fly by the warning sign. LEDs and black
mask. All the other parts are on the back side of the board.

Guy

-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Dennis Fritz
Sent: Thursday, September 02, 2010 10:55 AM
To: [log in to unmask]
Subject: [TN] NTC - Re: [TN] Is green solder mask the default by any IPC
standard or is it default by common usage?

Interesting comments on solder mask color.  In the dark ages (early 1980's)
I was product manager for solder mask at MacDermid - dating myself as they
have been out of the mask business for years, now.  

Anyway, legend has it that mask was green to blend with the background color
of laminate.  Seems the story was that the first adhesion promoter for glass
fiber to coat with epoxy resin was based on Chromates.  They were green,
giving the laminate a green tint.  Of course, for good environemental
reasons the adhesion promoter was changed to silanes, years ago.  I heard
green tint was added to laminate so there would be less customer reaction to
the change.  At the same time, there was red laminate, blue laminate and
black laminate.  Those made really great etched/plated wall hangings -
Constitutions, Declarations of Independence, ships, dogs, etc.  Think more
colored laminate was sold for non-work projects than for actual boards.  

Solder mask is similar, but does have some useful colors.  A number of OEMs
use red or blue for static sensitive boards. Of course, there is the debate
over matte or gloss mask.  The most interesting "custom mixed mask" I
remember was black.  Not total coverage with black marking ink, a black
mask.  Fabricator did not want the customer to see the traces under the mask
- don't know why, but Solder Mask over Bare Copper - SMOBC was a pads only
version.  Beautiful. 

Denny Fritz






-----Original Message-----
From: Douglas Pauls <[log in to unmask]>
To: TechNet <[log in to unmask]>
Sent: Thu, Sep 2, 2010 9:18 am
Subject: Re: [TN] Is green solder mask the default by any IPC standard or is
it default by common usage?


Gregg,
 have always liked the old military adage that said you can have any 
olor solder mask you want, as long as it is green.
To my knowledge, there is no default color requirement for solder mask in 
ny IPC specification, at least one that is current.  And as I am vice 
hair on the solder mask committee, that is a pretty good estimate.
Doug Pauls

"Temkin, Gregg" <[log in to unmask]> 
ent by: TechNet <[log in to unmask]>
9/01/2010 12:35 PM
lease respond to
echNet E-Mail Forum <[log in to unmask]>; Please respond to
Temkin, Gregg" <[log in to unmask]>

o
[log in to unmask]
c
Subject
TN] Is green solder mask the default by any IPC standard or is it default 
y common usage?



s green solder mask the default by any IPC standard or is it default by 
ommon usage?
In other words, if a drawing does not specify the solder mask color, is 
here a color IPC standards default to, or is it uncontrolled?
Thanks,
Gregg
______________________________________________________________________
his email has been scanned by the MessageLabs Email Security System.
or more information please contact helpdesk at x2960 or [log in to unmask] 
_____________________________________________________________________
---------------------------------------------------
echnet Mail List provided as a service by IPC using LISTSERV 15.0
o unsubscribe, send a message to [log in to unmask] with following text in
he BODY (NOT the subject field): SIGNOFF Technet
o temporarily halt or (re-start) delivery of Technet send e-mail to 
[log in to unmask]: SET Technet NOMAIL or (MAIL)
o receive ONE mailing per day of all the posts: send e-mail to 
[log in to unmask]: SET Technet Digest
earch the archives of previous posts at: http://listserv.ipc.org/archives
lease visit IPC web site http://www.ipc.org/contentpage.asp?Pageid=4.3.16 
or additional information, or contact Keach Sasamori at [log in to unmask] or 
47-615-7100 ext.2815
----------------------------------------------------

______________________________________________________________________
his email has been scanned by the MessageLabs Email Security System.
or more information please contact helpdesk at x2960 or [log in to unmask] 
_____________________________________________________________________
---------------------------------------------------
echnet Mail List provided as a service by IPC using LISTSERV 15.0
o unsubscribe, send a message to [log in to unmask] with following text in
he BODY (NOT the subject field): SIGNOFF Technet
o temporarily halt or (re-start) delivery of Technet send e-mail to 
[log in to unmask]: SET Technet NOMAIL or (MAIL)
o receive ONE mailing per day of all the posts: send e-mail to 
[log in to unmask]: SET Technet Digest
earch the archives of previous posts at: http://listserv.ipc.org/archives
lease visit IPC web site http://www.ipc.org/contentpage.asp?Pageid=4.3.16
for 
dditional information, or contact Keach Sasamori at [log in to unmask] or 
47-615-7100 ext.2815
----------------------------------------------------


______________________________________________________________________
This email has been scanned by the MessageLabs Email Security System.
For more information please contact helpdesk at x2960 or [log in to unmask] 
______________________________________________________________________

---------------------------------------------------
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
-----------------------------------------------------


______________________________________________________________________
This email has been scanned by the MessageLabs Email Security System.
For more information please contact helpdesk at x2960 or [log in to unmask] 
______________________________________________________________________

---------------------------------------------------
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
-----------------------------------------------------

ATOM RSS1 RSS2