Electronics Forum | Fri Mar 02 06:25:04 EST 2001 | PeteC
Thanks for your feedback. All the 0603 chips have the round solder lands but the 0805 chips and larger are rectangular. After speaking with the designer on it he said they chose round lands for the 0603 chips to get higher density of the circuit trac
Electronics Forum | Tue Nov 30 21:23:55 EST 1999 | cklau
hello; When we are doing component land pattern design , one thing will always be in our mind; that is the basic criteria or common land pattern design guideline for reflow and flow solder assemblies. For basic fomula in calculating resistors are:
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
Electronics Forum | Mon Oct 02 16:31:17 EDT 2000 | Larry
I have seen people take old stencils and cut out land patterns, place the component over the land pattern and use a orange stick to move the leads back into place.
Electronics Forum | Fri Aug 11 10:47:51 EDT 2000 | Peter Curtis
Does anybody have any information regarding the plus's and minus's of both copper and solder resist defined lands?
Electronics Forum | Thu May 11 11:14:05 EDT 2000 | �ngelo Marques
Hi, Your solder land it`s OK? Send me the dimensions of the solder land and the capacitor n.� of componentes in the PCB and the dimension of the PCB for trying help you. Sory my bad English. �ngelo
Electronics Forum | Tue Apr 27 12:32:53 EDT 1999 | Frank Hinojos
What is the current spec for sizing PCB pads for a land grid array? How about for a ball grid array? Are there industry spec's I can reference? Thanks, Frank
Electronics Forum | Wed Mar 20 15:18:09 EST 2002 | angiewest
You may want to check out IPC-SM-782 "Surface Mount Design and Land Pattern Standard" http://www.ipc.org Good Luck
Electronics Forum | Wed Feb 11 16:47:31 EST 2004 | Jim Hampshire
We are looking for industry input on solder mask patterns being used with fine ptch BGAs. Undersized mask openings vs. the land/pad, Solder mask defined lands/pads etc. Thank You.
Electronics Forum | Wed May 05 07:26:08 EDT 2004 | Frederic
Unfortunatly there is no land pattern in the component datasheet beside i am not fan of the land pattern recommendation from datasheet.
