Electronics Forum | Thu Feb 21 10:13:27 EST 2002 | Vince Whipple
Hi Dave G, This is an interesting problem.. I can only add the following: - Try trimming the pins and see it this helps.. sometimes the decreased surface area will lessen the surface tension enough to minimize the effect of bridging. - As Dave F was
Electronics Forum | Mon Feb 25 18:10:13 EST 2002 | stepheno
When you say "dropping" I assume you mean "rejecting" them because co-planarity is outside the tolerance you have set and the machine is putting them on the reject belt or tray as the case may be. I worked for a CM with an MPA-G3. One customer suppl
Electronics Forum | Thu Feb 28 07:57:52 EST 2002 | caldon
Marcos- BGA's and soldering manually is difficult. Typically soldering BGAs requires reflow just as a reflow oven does, so I recommend a rework station. Go to http://www.empf.org/html/empfset.htm and download Jan 2002, Dec 2001, Sep 2001, Aug 2001,
Electronics Forum | Mon Mar 25 13:48:52 EST 2002 | bcceng
We are currently applying solder bumps to hundreds of BCC's for rework. It is impossible to print to the PWB. It is recommended to apply solder bumps to the BCC's with 63/37 alloy making the rework faster and easier. Applying the solder bump on the
Electronics Forum | Thu Mar 28 13:25:43 EST 2002 | Mike Konrad
Hi Dave, No-clean paste is more difficult to remove in post-reflow cleaning applications. In stencil, misprint and tool cleaning applications however, no-clean paste poses no extra degree of cleaning difficulty. There are few special requirement
Electronics Forum | Tue Apr 02 22:58:10 EST 2002 | davef
Whatever I've said, my intent has never been to insult you. Smack you yes, insult you no. True, you never said the word �strings� but you did say � * �� shouldn't I be able to expect enough green strength from my epoxy to hold 0603 caps in place wi
Electronics Forum | Mon Apr 08 20:43:58 EDT 2002 | davef
Regardless of the design technology of the board, we use shop floor management software that: * Calculates the period that it takes to assemble a job. Obviously, we enter product-manufacturing information [ie, BOM, material receipt dates, process fl
Electronics Forum | Tue Apr 09 10:36:32 EDT 2002 | gregp
I assume there are a variety of people that participate in this forum, i.e. contract manufacturers, OEM's, in a variety of job functions related to the production of surface mount boards. I have read about many concerns regarding the wrong part issu
Electronics Forum | Mon Apr 15 05:04:02 EDT 2002 | ianchan
On a more layman's terms (am not a expert), here goes : 1) resistivity of DI rinse must be greater than 10M-ohms (some say greater than 16M-ohm?), dunno what is the FIX industrial standard? 2) DI water rinse usually is the end zone rinse, before th
Electronics Forum | Sun Apr 14 14:13:25 EDT 2002 | davef
I assume you're looking at stencil fab equipment because you need 'faster turns' than you can get from available stencil suppliers. While you're assessing this, consider other alternatives, such as: * Dispensing paste. [A very funny SMTNetter, livin
