Electronics Forum | Fri Oct 25 16:40:06 EDT 2002 | davef
Nor ment as a criticism of anyone, but you really need to become intimate with your stencil supplier. This is not one of those "throw it over the wall" buying relationships, like you can have with buying pencils. View this an opportunity to develop
Electronics Forum | Fri Oct 25 11:57:34 EDT 2002 | ricardof
Hi, I would like to know what would be the main steps to set-up a COB process? or what would be the main requirements to accomplish this? (eqipment: Die mounter, wire bondig, etc. Documentation: Certifications, etc. Plant readiness: Lay-out, eytc), I
Electronics Forum | Tue Oct 29 11:01:56 EST 2002 | yngwie
Ok..I will refer to the past thread myself....but, just an update, after getting the BGA rebaked ( as I didn't see an evidence from Production saying that they hv baked these batch of BGAs). The shorts are all gone. But one thing thou', if the proble
Electronics Forum | Sun Oct 27 07:56:58 EST 2002 | wongmanchung
Does any expert here know the specification of board deflection when we mounting component by pick and place machine? That is when the nozzle place the chip on the pcb, the board will have some deflection. And are there any requirment that we need t
Electronics Forum | Tue Oct 29 14:24:24 EST 2002 | genny
SOP small outline package SOIC small outline integrated circuit TSOP thin SOP TSSOP thin shrink SOP PQFP plastic quad flat pack (also CQFP is ceramic QFP) LQFP low profile QFP VQFP I don't know QSOP a guess is 'quad small outline pkg'
Electronics Forum | Wed Oct 30 09:28:50 EST 2002 | gregp
How about your designator actually contains size info in a code. For example, SO14-237-050-090. That is "package type" - "width" (over leads) - "lead pitch" - "thickness". The problem with this is a great deal of thought has to be put in before comm
Electronics Forum | Wed Oct 30 17:18:01 EST 2002 | Frank
What does it mean to 'register' a machine? Pay the fee and get service? Sounds like extortion... Does this happen in other industries as well? You can easily pay $60K-$100K (the price some new low end machines) for some exotic cars and you don't
Electronics Forum | Thu Oct 31 03:16:30 EST 2002 | swalter
I have read a number of discussion relating to cars purchases and it maintenance . As far as I know , in cars, you drain your money on that piece of luxury , however, for production equipment , you are investing to grow your money , we are all argui
Electronics Forum | Wed Oct 30 15:50:39 EST 2002 | dphilbrick
Dan Generally it is a good practice. If we are doing PTH type assembly or "low end" assembly I would probably not worry, but many board finishes today such as white tin, gold and OSP mandate special handling. Oils from dirty hands can cause solderin
Electronics Forum | Wed Oct 30 23:14:41 EST 2002 | caldon
Doug is right contaminates can be transfered from hands to boards easily. I also know gloves are a good practice as some times people wear moisturizers and hand creams that can also cause issues. Another thought is that you do not want people handl
