Electronics Forum | Wed Jan 30 17:49:41 EST 2002 | davef
PCB never expire, they just become more difficult to solder. [Many shops impose �shelf life� periods for their boards, but they aren�t going to discard the boards if the exceed the limits, unlike they would with some other process materials.] IDENT
Electronics Forum | Mon Apr 01 20:01:13 EST 2002 | davef
tombstone. These we do get nuts about with the fabricator.] 90+% of our capacitors are commodities. [So, we could care less who supplies them.] We qualify the remainder based on engineering requirements. Capacitors are a widely diverse class of
Electronics Forum | Fri Apr 26 12:18:24 EDT 2002 | Yngwie
Today the line experienced the white gloves turns green at the point of contact when holding fresh board that came out from wave soldering. Was that the effect of inproper solder mask curing at PCB house during fabrications ? For a proper cured solde
Electronics Forum | Wed Jun 19 22:03:23 EDT 2002 | davef
If you can assemble flawless products with these boards, do not be concerned about post-assembly quality issues. There is no current related specification in the US. Although, there may be some old military specifications that apply, but you would
Electronics Forum | Mon Nov 25 15:55:32 EST 2002 | davef
Sorry, no tricks for you. The good news is: your reflow recipe should be similar for both imm tin and HASL. Imm tin requires more attention to detail by both the fabricator and the assembler than HASL. There is a fair amount of discussion on imm
Electronics Forum | Mon Dec 02 20:53:29 EST 2002 | davef
Gerber[R] Data (File). Used in directing a photoplotter during printed circuit board and stencil artwork fabrication. Gerber Scientific Instrument Company used to be the dominant producer of the photoplotters used for "shooting" film, back when mec
Electronics Forum | Sun Jan 26 14:46:48 EST 2003 | Jkhaiar
Hi Every one Very interesting Subject Nothing new to add just to make it alive I think it have to do a lot with the market now. The low demands in the market and price competition have lowered the QC budget. Some one has said it; a reputed and resp
Electronics Forum | Mon Jan 27 13:15:33 EST 2003 | dphilbrick
Thanks for the revival of the thread! I have to assume there are quite a few factors creating this reduction of quality. I am not hearing about quality suffering in the assembly side of the industry here in the good ol' US but in the board fab side w
Electronics Forum | Fri Jan 17 15:47:28 EST 2003 | davef
There is no documentation like you seek. The life of your part in storage is primarily a function of: * Quality of the part fabrication process. * Ingenuity and diligence you apply in protecting the parts from the environment. You need to: * Handle
Electronics Forum | Mon Mar 03 11:28:24 EST 2003 | MA/NY DDave
Hi Normally I wouldn't do it. There are too many proto express shops that supply good results and in 1-3 days. Yet if you need to, you can buy some equipment that is designed just for prototypes. And right now their are huge fire sales. YiEng, MA
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