Electronics Forum | Wed Apr 08 14:46:34 EDT 2009 | boardhouse
The things to ask your board supplier would be: 1) Was the Pre-preg material that was used on this board within its Shelf life? and ask for the Incoming inspection CofC for the Pre-preg material. 2)Was this order shipped from Stock - this is why
Electronics Forum | Wed Dec 22 01:39:06 EST 2010 | boardhouse
Hi Johan, As a Asian board supplier - I would not recommend using Lead free hasl on any product that has BGA, you would be just looking for issues, flatness being the main. I agree with one of the other replies - Your purchasing dept. should not be
Electronics Forum | Thu May 30 09:55:52 EDT 2013 | rgduval
I like AIM solder paste, personally. But, much like asking which pick and place machine is best on this board, you're likely to get as many opinions as there are paste manufacturers. I just took a look at Alpha's datasheet for this product, and it
Electronics Forum | Wed Sep 20 09:24:09 EDT 2017 | bstogsdill
Hi- I am attempting to determine if the "User Performance Inspections" on table 4-1 are required or are they just optional? Section 4 para 4.2 only refers to Qualification Inspection and Quality Conformance Inspections that are performed by the past
Electronics Forum | Wed May 05 14:37:58 EDT 2004 | Gaz
I'm not in production, but I do repairs by replacing CSP & LGA components on PCB's. Our components are supplied sealed in packs of 5 with a humidity indicator card and desiccant. I recently failed an audit by the company I do the work for because th
Electronics Forum | Fri May 09 09:09:22 EDT 2003 | fmonette
Phil, here is why "dry cabinet storage may not stop the clock" : The moisture diffusion inside a component is actually quite complex. When previously exposed components are returned to dry storage, the moisture gradient that is already absorbed in
Electronics Forum | Sat Jun 30 11:03:29 EDT 2001 | davef
Nice to have you back on SMTnet. Some of the newer folk have missed-out on the solid contributions you�ve made to the Forum. The chicken wire cleaning basket was a classic!!! [It�s a shame that the folk at SMTnet can�t recover those files.] We bu
Electronics Forum | Fri Jun 18 11:37:10 EDT 1999 | Earl Moon
| | | | first of all what is the technical term for the small amount of solder on a plated pad. we are getting poor screen printing gasketing on a 20 mil qfp due to this solder not being even or too high in spots and not covering the length of the pa
Electronics Forum | Fri Jun 01 12:23:22 EDT 2001 | medernach
I've had good and bad experiences with OSP's. First of all, ask yourself, "Why use an OSP?" If you don't need it, don't use it. Solderability is dependent upon the number of thermal passes (the fewer, the better), the thickness of the coating, the
Electronics Forum | Wed Jan 05 11:11:09 EST 2000 | Dave F
Hey Pat: My responses are: 1. Does anyone have experience with the shelf life on immersion white tin? If so, how long can the boards be stored without adversely affecting solderability. I've heard one year. No, we don�t, because we turn boards fa
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