Electronics Forum | Tue Jun 07 16:19:58 EDT 2005 | davef
Q1) How to identify on good or bad ICs lead that could contribute to dewetting? A1) Distinguish between good or bad IC that could contribute to dewetting by testing for solderability, according to J-STD-002. Q2) What actions that must be taken in fa
Electronics Forum | Fri Mar 03 20:19:05 EST 2006 | Paul wood
THE IS A REASON ITS FOR SALE CHEAP THE DRS 24 IS BEING SOLD BECAUSE ITS NOT SO GOOD FOR LEAD FREE BGA REWORK IT CANNOT RAMP UP THE PCB AND PARTS AT THE SAME RATE BECUASE OF THE HOT PLATE.ITS A OLD MODAL AND LOTS FOR SALE AT $10K AS NO ONE WANTS THEM
Electronics Forum | Thu Aug 11 08:53:40 EDT 2005 | stefwitt
I�ve seen new table-top machines for $ 15,000 at exhibitions, but only one time and the same vendor didn�t show up the next time. Realistically, new machines capable of doing 0402 and 20 mil and a few kpph under $ 15,000 do not exist. Any used mach
Electronics Forum | Mon Aug 22 10:33:23 EDT 2005 | davef
Q1. What is recommended viscosity standard? A1: There is no standard. ASTM D4040-05 "Standard Test Method for Rheological Properties of Paste Printing and Vehicles by the Falling-Rod Viscometer" is a test method that might work. For more, look her
Electronics Forum | Thu Sep 01 18:53:08 EDT 2005 | Board House
Pr. I agree with some of the above responses. if you are seeing Delam issues with incoming PCB's the following should be check. 1) Check the OEM Print to what Material they are calling out to be manufactured with. 2) If they are calling out for S
Electronics Forum | Sat Aug 27 12:45:44 EDT 2005 | Mark
Thanks for the replies. Interesting white paper. Didn't quite answer my concerns but still a good read. I was actually surprised that to test temperature uniformity across the zone, they attached T/C's to the substrate rather than measure the ai
Electronics Forum | Wed Nov 09 07:31:41 EST 2005 | smtspecialist
The part I'm having problem with is a simple 0805 resistor 0R the inspection is done optical not mechanical and 75% of the rejects rate has the message: one or too many bad leads found. and the other 25% the messages will give a Background or Contras
Electronics Forum | Wed Nov 16 10:48:23 EST 2005 | aj
Hi, There are a few different types of CP6 which I think the main differences are on the board loading side of things. To briefly answer your questions: 1.What is the actual CPH you are getting during production. There are a lot of variables to c
Electronics Forum | Fri Jan 20 11:44:40 EST 2006 | Mike Dolbow Atotalgps.com
I have seen 100% Matte Tin plating and a lot of Sn/Ag/Cu plating for gull wing parts. This is the most common type of plating. Also in a lead free process you will see that the very end Toe of the part will not flow. This is due to the metal being cu
Electronics Forum | Tue Jan 10 20:39:06 EST 2006 | aqueous
Of course there are solvents which are less harmful to the environment than others. The operative phrase is �less harmful�. As a rule, water-based chemistries are �greener� than solvents. There are some solvent blends designed for aqueous-based eq
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