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 Jan 19 23:24:03 EST 2000 | armin
Hi, We have a couple of pcb's with PTH Crystal. We are looking for a spacer to be placed between the metallic body of the crystal and the via pad/land as they tend to short if wave soldered without a spacer. The spacer we are looking for is somethin
Electronics Forum | Thu Dec 16 11:54:45 EST 1999 | Mike Naddra
At reflow an inert atmosphere is used to mitigate the occurance of oxidation, to me the decision weather to move from an inert atmosphere is based on several things ; PCB surface finish - are you using a HASL finish, OSP or another surface finish and
Electronics Forum | Wed Oct 20 10:49:04 EDT 1999 | Brian
Hi! Stu's method is a half-truth. What it measures is the aggregate of all volatile material with a significant vapour pressure at the baking temperature, not just H2O. Short of very complex methods, it could be complemented by a comparitive measur
Electronics Forum | Thu Sep 02 04:26:02 EDT 1999 | Wolfgang Busko
| | To aid in heat dissipation of our PCB, we would like to try having copper fill areas on the board that are hot air levelled and not covered with solder resist. Then, when the board is reflowed, solder paste would be applied and then solder. Has a
Electronics Forum | Tue Jul 27 11:59:19 EDT 1999 | Wolfgang Busko
While inspecting incoming PCBs we detected around all plated-through-holes (only there and all in the same place) some halfmoonshaped light rings that match obviously only with the pink ring symptom shown in the IPC-A-600 chapter 2.5.2.. That would m
Electronics Forum | Wed Jul 21 13:12:11 EDT 1999 | John Thorup
| I have pcb's in which i am experiencing warping. | the boards are 12.8125" on a diagonal measurement. | they are out approximatley .010". | the boards are combination thru-hole,smt, they also have 3ounce copper.what is acceptable,and what is the pr
Electronics Forum | Tue Nov 03 10:33:10 EST 1998 | Chrys
| We run stiffeners on all of our product through our wave solder process and most of our product through our reflow and adhesive cure oven. The problem is we continually put on and take off stiffeners because of poor reliability of stiffeners stayi
Electronics Forum | Wed Nov 04 16:56:27 EST 1998 | Chris Lampron
| | We run stiffeners on all of our product through our wave solder process and most of our product through our reflow and adhesive cure oven. The problem is we continually put on and take off stiffeners because of poor reliability of stiffeners sta
Electronics Forum | Wed Sep 16 15:45:28 EDT 1998 | Rob Fischer
| | Dave, | | How thick are your PCBs? Do you have adequate topside preheat or are the bottom preheaters turned up to ensure proper filleting on the top side? | | Rob | Rob, The average PCB is .062". There is no topside preheaters on our
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