PCB Libraries Forum : J-STD-001: Plated Through-hole Obstruction https://www.PCBLibraries.com/forum/ Wed, 15 Apr 2026 10:21:02 +0000 Fri, 06 Oct 2017 06:55:12 +0000 http://blogs.law.harvard.edu/tech/rss Web Wiz Forums 12.07 360 https://www.PCBLibraries.com/forum/RSS_post_feed.asp?TID=2145 <![CDATA[PCB Libraries Forum]]> https://www.PCBLibraries.com/forum/forum_images/PCBLForumLogo.gif https://www.PCBLibraries.com/forum/ <![CDATA[J-STD-001: Plated Through-hole Obstruction : There are some PCB Layout notes...]]> https://www.PCBLibraries.com/forum/jstd001-plated-throughhole-obstruction_topic2145_post9247.html#9247 Author: Tom H
Subject: 2145
Posted: 06 Oct 2017 at 6:55am

There are some PCB Layout notes that I created here - https://blogs.mentor.com/tom-hausherr/ 

More will be coming.

]]> Fri, 06 Oct 2017 06:55:12 +0000 https://www.PCBLibraries.com/forum/jstd001-plated-throughhole-obstruction_topic2145_post9247.html#9247 <![CDATA[J-STD-001: Plated Through-hole Obstruction : I learned many things till now...]]> https://www.PCBLibraries.com/forum/jstd001-plated-throughhole-obstruction_topic2145_post9245.html#9245 Author: Anderson
Subject: 2145
Posted: 06 Oct 2017 at 2:46am

I learned many things till now online but I want to know more, specifically want to get practical knowledge. Is there any blog or tutorials you want to refer me?]]> Fri, 06 Oct 2017 02:46:31 +0000 https://www.PCBLibraries.com/forum/jstd001-plated-throughhole-obstruction_topic2145_post9245.html#9245 <![CDATA[J-STD-001: Plated Through-hole Obstruction : Hello, I am beginner to Soldering...]]> https://www.PCBLibraries.com/forum/jstd001-plated-throughhole-obstruction_topic2145_post9079.html#9079 Author: JamesUS
Subject: 2145
Posted: 12 Aug 2017 at 7:07am

Hello, I am beginner to Soldering and IPC Training, as I know the IPC J-STD-001 is a training program which require learning the material in the J-STD-001 specification related to various assembly methods. When I needed some help related to soldering I usually go to www.ipctraining.com.]]> Sat, 12 Aug 2017 07:07:48 +0000 https://www.PCBLibraries.com/forum/jstd001-plated-throughhole-obstruction_topic2145_post9079.html#9079 <![CDATA[J-STD-001: Plated Through-hole Obstruction : IPC-J-STD-001 identifies Hole...]]> https://www.PCBLibraries.com/forum/jstd001-plated-throughhole-obstruction_topic2145_post8893.html#8893 Author: Tom H
Subject: 2145
Posted: 15 May 2017 at 6:25pm

IPC-J-STD-001 identifies Hole Obstruction as “Partsand components shall be mounted such that they do not obstruct solder flow ontothe solder destination side lands (pads) of plated through holes (PTH’s)required to be soldered”.

Example of Hole Obstruction:

This issue pertains to through-hole terminals that are under the component package where the bottom of the package sits directly on the PCB surface and can be resolved by simply lifting the component package slightly off to PCB surface. IPC-J-STD-001 states minimal acceptable conditions for supported holes for through-hole terminals are Acceptable for Class 1, Process Indicator for Class 2 (means the assembly process can be improved) and a Defect for Class 3.

Thesolder for PTH parts should reveal “Visible Wetting” on the top side of thePCB.


Toavoid Hole Obstruction, component manufacturers are forming the package body tolift it off the PCB allowing the Air in the hole to be pushed out and form anadequate solder joint.


4-pinPTH Oscillator with bottom side bumps:




LEDwith Lead Stops to prevent the component body from touching the PCB:



RadialCapacitor with Kinked Leads to be able to inspect “Visible Wetting”:



]]> Mon, 15 May 2017 18:25:26 +0000 https://www.PCBLibraries.com/forum/jstd001-plated-throughhole-obstruction_topic2145_post8893.html#8893