Electronics Forum | Thu Aug 09 15:56:50 EDT 2001 | davef
Thank you. IPC-2222 applies to rigid organic boards. It does not apply to ceramic boards. Since there is no 2222 analog for ceramic boards, I used 2222.
Electronics Forum | Sat Nov 10 07:33:51 EST 2007 | davef
Josh: 2222 will meet your requirements. 2221 is a companion to 2222. So, if you're going to try to get your engineers to follow an accepted standard, you might need both. Although, they probably already have both and are just playing dumb with you.
Electronics Forum | Thu Jul 21 22:14:34 EDT 2005 | Ken
Anyone else disagree with IPC-2222 for min-lead to max hole in the application of ribbon lead connector styles?
Electronics Forum | Wed Feb 22 20:33:25 EST 2006 | davef
Here's your design rules: * IPC-2221 * IPC-2222 Bonus is that they include the works, not just break-away tabs
Electronics Forum | Thu Oct 14 13:26:31 EDT 1999 | Brian W.
I would suggest comparing the profile your factory used and the one they are using. Run a profile on some of the 0402 parts. If the profile is not right, uneven heating will cause this to occur. It could also be the placement accuracy in combinati
Electronics Forum | Thu Oct 14 13:36:37 EDT 1999 | Brian W.
I forgot to mention nitrogen usage. Check if the usage of notrogen is different in your ovens compared to theirs. Brian
Electronics Forum | Thu May 09 17:19:28 EDT 2002 | davef
Can�t help you with the article that you read. Other places to start are: * 2221, 7.2 Heat Dissipation Considerations, 7.3 Heat Transfer Techniques, and 8.1.10 Heat Dissipation * 2222, 9.1.2 Thermal Relief In Conductor Planes
Electronics Forum | Thu Feb 05 08:39:16 EST 2004 | davef
IPC-2222 - Sectional Design Standard For Printed Board For Organic Printed Boards, Table 9-3 � Plated Through Hole Diameter To Lead Diameter Relationships will give you the standard information you require.
Electronics Forum | Wed Jul 07 17:47:00 EDT 2004 | davef
For bare board design for test, try: * IPC-2221 - Generic Standard On Printed Board Design * Section standard for the board type [eg, IPC-2222 - Sectional Design Standard For Printed Board For Organic Printed Boards]
Electronics Forum | Wed Jul 20 17:23:19 EDT 2005 | davef
IPC-2222 - Sectional Design Standard For Printed Board For Organic Printed Boards, Table 9-3 � Plated Through Hole Diameter To Lead Diameter Relationships will give you the standard information you require.
winsouce.jpg)