Electronics Forum | Tue Nov 18 01:21:14 EST 2008 | kywl
Hi all, I am referring to IPC 1720, and i notice that there's electronic assembly type 1A, 1B, 1C, 1X, 2B, 2C... 2Z... can anyone please help explain what do those numbers mean? I have no clue at all... Thanks!
Electronics Forum | Thu Jul 10 09:55:47 EDT 2003 | davef
A reading of the pictures is: A1: Looks like pad [B1] is smaller than the other pads. It�s weird that the pads are such different colors. A2: Looks like pad [B1] is smaller than the other pads. Solder mask opening [B1] is misregistered and seems s
Electronics Forum | Mon Apr 04 18:23:35 EDT 2005 | GS
Solder volumes is very important parameter to keep under control in order to get a good and reliable CCGA solder joint, and an automatic 3D paste volume inspection is strongly recommended practice to use. Questions: - what Column pitch do your CCGA h
Electronics Forum | Mon May 31 03:53:38 EDT 2010 | saa
Hi Nicolas, For level 4 and above you can NOT stop the floor life when the items are exposed for more than 8 hrs even if you store them in a dry cabinet or seal them back in MBB. For Level 3 and below you can stop/ pause the floor life whenever y
Electronics Forum | Tue Jul 17 00:10:32 EDT 2012 | amitsindwani
Referring to IPC/JEDEC J-STD-033B.1 section 3.3.2.2 'The amount of desiccant used, per moisture barrier bag, shall be based on the bag surface area and WVTR in order to limit the interior relative humidity in the MBB to less than 10% at 25°C.' So wha
Electronics Forum | Wed Feb 08 11:46:19 EST 2023 | tommy_magyar
Yes, your statement is correct. J-STD-033B.1 section 5.3.3.2 SMD packages not sealed in a MBB may be placed in a dry atmosphere cabinet, maintained at not greater than 5% RH. Storage in these dry cabinets may be considered equivalent to storage in a
Electronics Forum | Thu May 18 10:20:55 EDT 2006 | slthomas
Russ asks good questions and I think Chunks pretty much nailed it. Aspect ratio (aperture width/stencil thickness) s/b 1.2 minimum (I like 1.5 if I can get it). If your aperture width = lead width (.008"), yours is 1. Tough to get consistent paste r
Electronics Forum | Tue Mar 23 16:28:07 EST 1999 | CHANCE TURNER
| I am looking for clip art images of electronics assembly. Images like wave soldering, surface mount components, soldering irons... just general assembly graphics. Many sites have different individual images that they use I was just wondering if a
Electronics Forum | Wed Mar 24 16:54:38 EDT 2010 | stepheniii
J-STD-033B.1 Says "For cavity packages in which water may be entrpped, water clean processes after first reflow can be an additional source of moisture. This may present an additional risk, which should be evaluated." And it talks about derating if
Electronics Forum | Mon Jun 13 07:56:37 EDT 2022 | spoiltforchoice
This is basic spreadsheet manipulation. Sort your exported BOM from your pick and place machine into the same order as your BOM. Now paste the columns you want to compare from one to into the other. In an empty adjacent column you can now put in a fo
