Electronics Forum: landpatterns (Page 1 of 2)

Re: Tombstoning

Electronics Forum | Tue Feb 23 09:09:34 EST 1999 | Steve Schrader

| What to look for that causes tombstoning and the corective action. | Check your land-patterns. If they do not meet IPC standards, change your CAD libraries to IPC (or some other industry accepted standards such as SMTPLUS). If you have "home-gr

Re: IPC Land Pattern Vs Manufacturer's Recommendation

Electronics Forum | Wed Sep 06 09:06:05 EDT 2000 | Wolfgang Busko

Randy: Seems you have a long way to go to DFM. To your strategy: - proof that in the case of wrong landpattern design the IPC would have been the better choice - count money ( what�s the cost of redesigns due to bad landpatterns ) - establish at leas


Electronics Forum | Fri Dec 14 02:15:56 EST 2001 | helag

I would like to know if anyone else has experience with testing bga's with xray ? We are trying to find out what would be the best landpattern shape

PCB land pattern for RC0402 and CC0402

Electronics Forum | Fri Sep 26 12:19:09 EDT 2008 | davef

For the IPC Land Pattern Viewer, look here: http://landpatterns.ipc.org/default.asp


Electronics Forum | Mon Dec 09 16:10:50 EST 2013 | davef

IPC-7351 Land Pattern Calculator and Tools [landpatterns.ipc.org/] Generic requirements for surface sount Design and Land Pattern Standards, is supplemented by a footprint expert software tool

DPAK pad layout

Electronics Forum | Mon Nov 20 20:38:21 EST 2006 | davef

�IPC-7351 LP Wizard� is the library maintenance tool that is revolutionizing the way designers work. The IPC-7351 LP family tools can give you access to options that will allow you to quickly and easily browse your PCB land pattern library to locate,

Re: PLCC Land Pattern specs, SM-782A

Electronics Forum | Tue May 23 10:42:37 EDT 2000 | Wolfgang Busko

Hi Brett, we like designer who care about pad design, welcome on board. Go to the IPC-homepage under www.ipc.org. There you find the information how to order IPC-documents, you don�t have to be a member to get them. Also you can find an online landp

Re: IPC Component ID

Electronics Forum | Wed Mar 29 02:42:21 EST 2000 | Wolfgang Busko

Michael: "C1005" stands for Capacitor 0402. For the package 0603 you need to choose "C1608". This is out of IPC-SM-782. I don�t know where it�s coming from we also deal with 0603 or 0805. IPC uses RLP-numbers (Registered Land Pattern Number) to ident

solder paste coverage

Electronics Forum | Wed Jun 01 07:34:19 EDT 2005 | davef

It's unusual to use a horseshoe shaped pad for a 0805. Commonly when people want to reduce the paste volume to reduce solder balling, they print a "home plate" aperature. We print paste 1:1 with the pad. �IPC-7351 LP Wizard� is the library mainten

LGA36 6.5 x 3.5 mm

Electronics Forum | Fri Apr 06 16:36:39 EDT 2007 | mika

Ah, I almost forget (forgot?) to mention that according to the Gerber files (which is the info we send to the PCB-house) the PCB land pattern for this LGA-36 0.35mm rounded pads and the boardhouse cannot achieve this. I understand them; 0.35mm pads,

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