PCB Libraries Forum : Minimum Gang Solder Mask Web https://www.PCBLibraries.com/forum/ Tue, 07 Apr 2026 01:14:39 +0000 Wed, 11 Sep 2024 07:40:35 +0000 http://blogs.law.harvard.edu/tech/rss Web Wiz Forums 12.07 360 https://www.PCBLibraries.com/forum/RSS_post_feed.asp?TID=3344 <![CDATA[PCB Libraries Forum]]> https://www.PCBLibraries.com/forum/forum_images/PCBLForumLogo.gif https://www.PCBLibraries.com/forum/ <![CDATA[Minimum Gang Solder Mask Web : Thank you very much for your reply....]]> https://www.PCBLibraries.com/forum/minimum-gang-solder-mask-web_topic3344_post13657.html#13657 Author: bab27
Subject: 3344
Posted: 11 Sep 2024 at 7:40am

Thank you very much for your reply.]]> Wed, 11 Sep 2024 07:40:35 +0000 https://www.PCBLibraries.com/forum/minimum-gang-solder-mask-web_topic3344_post13657.html#13657 <![CDATA[Minimum Gang Solder Mask Web : I provided IPC-7352 with the silkscreen...]]> https://www.PCBLibraries.com/forum/minimum-gang-solder-mask-web_topic3344_post13648.html#13648 Author: Tom H
Subject: 3344
Posted: 03 Sep 2024 at 8:15am

I provided IPC-7352 with the silkscreen and solder mask illustration on page 34. 

IPC (as a standards organization) does not have any guidelines for silkscreen because they don't believe in silkscreen. They're recommendation is "No Silkscreen", but I think that's in reference to mass production boards. 

As PCB designers we all create prototype boards that require silkscreen for small batches. We recommend a silkscreen line width between 0.12 mm minimum, 0.15 mm nominal and 0.20 mm maximum. 

IPC has no rules or guidelines on solder mask. The current range for solder mask annular ring in the electronics industry (from component manufacturers recommendations) is between 0.05 mm minimum, 0.07 mm nominal and 0.10 mm maximum. 

The gap between the silkscreen and solder mask would be the tolerance of the application of both, which is 0.07 total. You don't want any silkscreen encroaching in the solder mask removal area. If there is silkscreen in the solder mask removal area, the fabrication shop will automatically trim it off for you. 

]]> Tue, 03 Sep 2024 08:15:57 +0000 https://www.PCBLibraries.com/forum/minimum-gang-solder-mask-web_topic3344_post13648.html#13648 <![CDATA[Minimum Gang Solder Mask Web : I&#039;m looking for an IPC for...]]> https://www.PCBLibraries.com/forum/minimum-gang-solder-mask-web_topic3344_post13647.html#13647 Author: bab27
Subject: 3344
Posted: 03 Sep 2024 at 5:58am

I'm looking for an IPC for these kinds of specification.

IPC-7352 Page 34, there is an example with 0.50 mm Pitch SOP with 0.05 mm Solder Mask from copper and 0.075 mm from Solder Mask to Legend (silkscreen).

Do you know if there is more information according to the fabrication level, A, B or C about that?

]]> Tue, 03 Sep 2024 05:58:43 +0000 https://www.PCBLibraries.com/forum/minimum-gang-solder-mask-web_topic3344_post13647.html#13647 <![CDATA[Minimum Gang Solder Mask Web : There is something you need to...]]> https://www.PCBLibraries.com/forum/minimum-gang-solder-mask-web_topic3344_post13358.html#13358 Author: Tom H
Subject: 3344
Posted: 20 Dec 2023 at 10:12am

There is something you need to know. 

If your fabrication shop requires a 0.10 mm solder mask sliver, if you don't Gang Mask the row of pads in your PCB library, your fabrication shop will run a check on your Gerber data to find every pad that has a sliver less than 0.10 mm and they will gang mask the row of pads without even asking you. 

So either you provide the correct data or they will correct your data. 

]]> Wed, 20 Dec 2023 10:12:17 +0000 https://www.PCBLibraries.com/forum/minimum-gang-solder-mask-web_topic3344_post13358.html#13358 <![CDATA[Minimum Gang Solder Mask Web : OK ,Some of my fab shop don&#039;t...]]> https://www.PCBLibraries.com/forum/minimum-gang-solder-mask-web_topic3344_post13357.html#13357 Author: yvoren1
Subject: 3344
Posted: 20 Dec 2023 at 10:04am

OK ,
Some of my fab shop don't want to go under 0.1mm , but now i know how far i can go
Thank you Tom!
]]> Wed, 20 Dec 2023 10:04:19 +0000 https://www.PCBLibraries.com/forum/minimum-gang-solder-mask-web_topic3344_post13357.html#13357 <![CDATA[Minimum Gang Solder Mask Web : First, setting the solder mask...]]> https://www.PCBLibraries.com/forum/minimum-gang-solder-mask-web_topic3344_post13356.html#13356 Author: Tom H
Subject: 3344
Posted: 20 Dec 2023 at 9:57am

First, setting the solder mask web to 0.10 is overkill. 

Fabrication shops can easily produce a 0.07 solder mask sliver. 

Where the Fabrication industry needs is a 0.05 mm solder mask swell and a 0.05 solder mask web. 

This will ensure a solder mask sliver between every SMD pad stack and eliminate Gang Masking of entire rows of pads. 

Ask your fabrication shop how accurate is their solder mask application process. 

]]> Wed, 20 Dec 2023 09:57:44 +0000 https://www.PCBLibraries.com/forum/minimum-gang-solder-mask-web_topic3344_post13356.html#13356 <![CDATA[Minimum Gang Solder Mask Web : Yes, that’s what I would like...]]> https://www.PCBLibraries.com/forum/minimum-gang-solder-mask-web_topic3344_post13355.html#13355 Author: yvoren1
Subject: 3344
Posted: 20 Dec 2023 at 6:43am

Yes, that’s what I would like to know!]]> Wed, 20 Dec 2023 06:43:36 +0000 https://www.PCBLibraries.com/forum/minimum-gang-solder-mask-web_topic3344_post13355.html#13355 <![CDATA[Minimum Gang Solder Mask Web : Are youwondering why the solder...]]> https://www.PCBLibraries.com/forum/minimum-gang-solder-mask-web_topic3344_post13354.html#13354 Author: Tom H
Subject: 3344
Posted: 19 Dec 2023 at 4:35pm

Are you wondering why thesolder mask excess isn’t limited to prevent a sliver instead of increased tofill the sliver?

]]> Tue, 19 Dec 2023 16:35:53 +0000 https://www.PCBLibraries.com/forum/minimum-gang-solder-mask-web_topic3344_post13354.html#13354 <![CDATA[Minimum Gang Solder Mask Web : Hi, I’d like to understand how...]]> https://www.PCBLibraries.com/forum/minimum-gang-solder-mask-web_topic3344_post13353.html#13353 Author: yvoren1
Subject: 3344
Posted: 19 Dec 2023 at 1:17pm

Hi, I’d like to understand how work Minimum Gang SolderMask Web in SMD Pad Stack Rules

I have these specifications in Component Data




If I use 0.10 mm for the Minimum Gang Solder web mask, I get a0.83 x 0.40 mm mask, so the web mask = 0.10 mm that is correct





IfI use 0.10 mm for the Minimum Gang Solder web mask, I get a 0.83 x 0.50 mm mask,hence the web mask. I don't understand why the mask becomes 0.40 mm to 0.50 mm.

Iexpected the mask to stay at 0.40 mm for a 0.10 mm web



]]> Tue, 19 Dec 2023 13:17:41 +0000 https://www.PCBLibraries.com/forum/minimum-gang-solder-mask-web_topic3344_post13353.html#13353