PCB Libraries Forum : Double Segment Polarity Mark

PCB Libraries Forum : Double Segment Polarity Mark https://www.PCBLibraries.com/forum/ Tue, 07 Apr 2026 06:15:03 +0000 Mon, 22 Oct 2012 09:59:42 +0000 http://blogs.law.harvard.edu/tech/rss Web Wiz Forums 12.07 360 https://www.PCBLibraries.com/forum/RSS_post_feed.asp?TID=251 <![CDATA[PCB Libraries Forum]]> https://www.PCBLibraries.com/forum/forum_images/PCBLForumLogo.gif https://www.PCBLibraries.com/forum/ <![CDATA[Double Segment Polarity Mark : We have decided that on many...]]> https://www.PCBLibraries.com/forum/double-segment-polarity-mark_topic251_post2086.html#2086 Author: Tom H
Subject: 251
Posted: 22 Oct 2012 at 9:59am

We have decided that on many component families there is no room for double silkscreen outlines for Polarity Marking.

Instead, the new standard is the "Lack of Silkscreen" is the new polarity marker.

Can you look at this QFN picture with the physical component installed and tell me where Pin 1 is?

Nice solution for bottom only terminal parts and micro-miniature packages.

]]> Mon, 22 Oct 2012 09:59:42 +0000 https://www.PCBLibraries.com/forum/double-segment-polarity-mark_topic251_post2086.html#2086 <![CDATA[Double Segment Polarity Mark : If there is room, add a short...]]> https://www.PCBLibraries.com/forum/double-segment-polarity-mark_topic251_post605.html#605 Author: RLS2004
Subject: 251
Posted: 29 May 2012 at 5:48pm

If there is room, add a short ss segment to improve visibility of the pin 1 polarity.

EG for DIOSC95P205x160x80-4N Place a short silkscreen line segment, the length of pin 1, just above the upper silkscreen line by pin 1 (like a double line).]]> Tue, 29 May 2012 17:48:18 +0000 https://www.PCBLibraries.com/forum/double-segment-polarity-mark_topic251_post605.html#605