Electronics Forum: 20-25 2005 (Page 1 of 1)

smt zener color codes

Electronics Forum | Wed Jun 22 14:20:25 EDT 2005 | mmjm_1099

http://www.crystalradio.net/cal/diodeid.shtml

PCB cosmetic reject after reflow

Electronics Forum | Mon Aug 08 20:25:39 EDT 2005 | plcc

Hi Davef, I'm suspecting that too! The recipe we are using is the optimum for good soldering results. I'm checking with our supplier on the type of pcb material. Do you know the recommended material for pcb undergoing reflow, under ROsH condition?

Touch or no touch-up

Electronics Forum | Fri Feb 11 08:20:25 EST 2005 | Rob

Depends what the joint is on, and how historically it has performed - ie. is it a part that won't wick on the wave, or near a ground plane that never forms properly. It may be that they know something you don't about the board. However any info s

SMEMA conveyor

Electronics Forum | Fri Nov 04 20:25:47 EST 2005 | mika

Always happy to share information. Perhaps other viewers on this thread, can get some ideas of "how to". /Sincerely Ps. There is a so called "standard height" which the conveours/machines from different manufactories must be able to reach; without r

BGA Specifications for IPC Class

Electronics Forum | Wed Feb 02 21:56:11 EST 2005 | davef

Based on X-ray imaging, IPC-7095 standard specifies three categories for void size for BGA solder joints. These categories are based on the percentage of joint cross sectional area occupied by the voided area. Class III Small: Void area is LT 9% Cla

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