Electronics Forum | Mon Mar 03 13:22:20 EST 2003 | MA/NY DDave
Hi I see David F already gave a good answer. The basic advantage, if you can afford it, is a more stable PCB during the soldering process. Higher Tg enables this. Also some materials serve to match CTEs (coefficient of thermal expansion) a bit bett
Electronics Forum | Thu Feb 27 12:23:47 EST 2003 | woodsmt
James, Have you considered going to a No-clean process? BGA's can be difficult to impossible to clean using an aqueous process. The water just won't penetrate under the entire BGA and efficiantly remove your flux residues. The tighter the pitch
Electronics Forum | Fri Feb 28 10:32:45 EST 2003 | pjc
Cookson Electronics Equipment- Electrovert AquaStorm 200 highly recommended options: Checkmate Conveyor Hurricane Jets in Wash and Rinse 4 Additional Top Spray Bars in Wash *Closed Loop Filtration System for Wash *Positive Displacement Chemical Meter
Electronics Forum | Mon Apr 28 09:59:04 EDT 2003 | davef
Your customer's question is reasonable. Soldering to nickel is not always a walk on the beach [can of corn, or whatever]. This issue is flux not solder. Your Sn63 will have plenty of strength, providing the solder connection is well formed. You s
Electronics Forum | Wed Apr 30 20:33:15 EDT 2003 | davef
Haaaa!!!! Yes, we�ve seen things like that. We found that a high input impedance amplifier worked fine in a room with a controlled environment and worked poorly in the sweat-shop portion of our plant. We were using good ol� WS609, straight water w
Electronics Forum | Tue Jun 10 08:27:18 EDT 2003 | davef
Q1: Suppose I want to qualify a SMT product for lead free, do I need to use a lead free solder paste or any other normal solder paste will do ? A1: Today, most solder pastes contain lead [Pb]. Q2: What are the impact of using a lead free solder past
Electronics Forum | Thu Jul 31 11:33:51 EDT 2003 | yngwie
I faced problem over connecter's pin that were hot air soldered. This connector has 168 pins ( similar to the straddle connector ). The process is to apply the flux onto the connector's J-leads, and the hot air pencil were then ran thru' the leads to
Electronics Forum | Mon Sep 29 18:13:20 EDT 2003 | lysik
Good points Ken But the reality of the matter is that we are selling off some fuji equipment that even though it is 1994/1995 still has a sale value of 45-65K Each. I am replacing it with faster systems with 0201 specs. With the margins so razor thin
Electronics Forum | Mon Nov 24 11:24:34 EST 2003 | Bill
Sorry for the long delay in response.. As it turns out, the float switch on our transfer station was gummed up (probably by the defoamer residue) and allowed the transfer station to get behind (backing up the gravitational flow of the wash system).
Electronics Forum | Sat Nov 08 09:42:22 EST 2003 | ethercom
Hi: I have seen this problem before. It is caused by improper curing of solder mask by the fab manufacturer. When you run the board thru' wave solder, and then wash the board, you see the problem of white residue. However, when you apply heat, you c
