PCB Libraries Forum : Mask opening for 0201 parts https://www.PCBLibraries.com/forum/ Tue, 14 Apr 2026 15:48:12 +0000 Tue, 01 May 2012 20:00:18 +0000 http://blogs.law.harvard.edu/tech/rss Web Wiz Forums 12.07 360 https://www.PCBLibraries.com/forum/RSS_post_feed.asp?TID=43 <![CDATA[PCB Libraries Forum]]> https://www.PCBLibraries.com/forum/forum_images/PCBLForumLogo.gif https://www.PCBLibraries.com/forum/ <![CDATA[Mask opening for 0201 parts : Hi Tom, Thanks for your suggestions...]]> https://www.PCBLibraries.com/forum/mask-opening-for-0201-parts_topic43_post123.html#123 Author: Nightwish
Subject: 43
Posted: 01 May 2012 at 8:00pm

Hi Tom,
 
Thanks for your suggestions and we already remved the mask between the pads. When the DFME check the board using Valor, the mask less than 3mil will reported as a silver error and this  is also one of the reason we decide to remove the mask.
 
Thanks,
 
Nightwish
]]> Tue, 01 May 2012 20:00:18 +0000 https://www.PCBLibraries.com/forum/mask-opening-for-0201-parts_topic43_post123.html#123 <![CDATA[Mask opening for 0201 parts : Yes, Gang Mask is used when...]]> https://www.PCBLibraries.com/forum/mask-opening-for-0201-parts_topic43_post118.html#118 Author: Tom H
Subject: 43
Posted: 28 Apr 2012 at 3:25pm

Yes, Gang Mask is used when the solder mask sliver is less than 3 mils. i.e.: it's better to have no solder mask than a fine line sliver. I have never heard of assemly solder problems due to no solder mask.
 
As a matter of fact, I've worked on many RF and Space Satellite boards that did not have any solder mask. But these get tricky because the solder will start to run down the trace during reflow when there is no solder mask.
 
But for your application, removal of solder mask between pads is common.
 
]]> Sat, 28 Apr 2012 15:25:05 +0000 https://www.PCBLibraries.com/forum/mask-opening-for-0201-parts_topic43_post118.html#118 <![CDATA[Mask opening for 0201 parts : Hi Tom, Our DFME suggest that...]]> https://www.PCBLibraries.com/forum/mask-opening-for-0201-parts_topic43_post117.html#117 Author: Nightwish
Subject: 43
Posted: 28 Apr 2012 at 12:08am

Hi Tom,

Our DFME suggest that the mask should be removed from the gap between two pads for 0201 components. What do you think about this?
 
Thanks,
 
Nightwish
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