Electronics Forum | Thu Feb 22 10:32:25 EST 2001 | CAL
SCOTT- We do solderability testing for the electronics industry using a Multicore and Kester Wetting Balance testers. The standards we test to is IPC J-STD 002 for components and J-STD 003 for PCBs. There is also a system called SERA we co-developed
Electronics Forum | Wed Apr 18 20:55:20 EDT 2001 | davef
Yins are bad, this guy's serious. Generally, solder pastes are comprised of: 90% solder powder, 5% flux, 4% solvents, and 1% activators [by weight]. Where: * Solder powder, when reflowed, is a metal bonding agent that mechanically and electrically
Electronics Forum | Fri Aug 03 15:58:07 EDT 2001 | arsmoriendi
Hi again! First thanks to all for your help. Second, i beleive that i need to clarify something, the unsoldered component was caused due a missing window in the stencil, the process engineer leave the stencil in the production line after i
Electronics Forum | Thu Jan 27 17:54:37 EST 2000 | Steve Harshbarger
Casimir, I have seen exactly what you are experiencing with the Kester 958 on other wave lines. No clean fluxes vary in how much flux residue is visually left behind. These no clean residues are typically not harmful to the PCB, but they are often
Electronics Forum | Tue Oct 12 04:18:12 EDT 1999 | Scott Davies
| | We have three buckets filled with leftover solder paste from our screen printing process. Kester has informed me that they no longer take paste, but only dross and pot dumpings. Does anyone know if there's someplace I can recycle this, or am I
Electronics Forum | Thu Apr 22 18:07:38 EDT 1999 | Tom B.
| On various PCB's after building processes,such as reflow, flowsolder and wash. The soldermask on the PCB's have become discoloured, like a 'marble' effect all along the solder side of the board, it is lighter in contrast than normal, although when
Electronics Forum | Mon Mar 15 15:52:38 EST 1999 | Earl Moon
| After switching from No-clean flux to Water soluble (Kester)we encountered voids problem (X-ray and microsectioning). Reducing the apperture sizes made the voids smaller but did not eliminate them. So we had to go back to No-clean. Any idea why voi
Electronics Forum | Tue Feb 09 11:44:31 EST 1999 | john
| Hi. | I'm trying to looking for a manner to enlagre the solder tip life. I have heard about some chemicals substances that | help both avoid or eliminate oxidation on tips. | Anybody can suggest me some of those products | Thanks in advance | Mario
Electronics Forum | Fri Jan 22 17:03:55 EST 1999 | Ross Berntson
| I'm currently planning to do an evaluation of RMA flux solder pastes for mil type applications. Does anyone have any suggestions for vendors to try? I'm especailly interested in pastes that aid application on boards with 20 mil pitch. | I am fro
Electronics Forum | Mon Oct 19 13:32:06 EDT 1998 | Mark Schwarz
| How are solder pastes manufactured right from the level of extracting lead and tin ? | | | The Tin Institute is good but I rarely find that the raw metals industries guys know about pastes. Making a tin-lead alloy for pastes, as for raw bars, is
