Electronics Forum | Tue May 26 10:23:53 EDT 2009 | mun4o
hi, i am proccess eng solder wave process.I have problem with a PCB.There have ceramic SMD capacitor, SMD thermistor and SMD inductor 1uH.After reflow all is OK, but after SW these components are broken???The pin is separated from the body???the que
Electronics Forum | Sat Jun 06 15:14:35 EDT 2009 | ysutariya
If the concern is the increased moisture absorption associated with lead-free capable materials, you probably have the most experience with phenolic materials like Isola IS410 or 370HR. The best move would be to switch to an IPC 4101/99 or /124 mate
Electronics Forum | Wed May 27 13:24:51 EDT 2009 | ck_the_flip
These are becoming extremely popular at my company. I have searched the SMTNet archives and found this: http://www.smtnet.com//forums/index.cfm?fuseaction=view_thread&CFApp=1&Thread_ID=7575&#Message30119 Has anybody used other attachement methods?
Electronics Forum | Thu May 28 11:22:37 EDT 2009 | kvirden
Dear Craig, Quick note for you. The Model 1800 W has been replaced by the new MKIII series. The new updates, just won best new product and Vision Award at the Apex show last month�so lots of good things going on there. Not sure where you are loc
Electronics Forum | Thu May 28 12:05:11 EDT 2009 | wrongway
We have A heller 1809 2005 model have replaced the chain drive motor twice have replaced 2 top blowers and one bottom blower as far as reflowing the solder performance has been great. the tech support has been great as well. we run 3 shifts 5 days
Electronics Forum | Thu May 28 16:10:07 EDT 2009 | operator
How does one keep a pcb safe from ESD when applying an aerosol conformal coating on a flat surface? Even if you had an ESD mat to place the pcb on it would quickly be coated. The only thing I can think of is an ionizer. Does not the aerosol create a
Electronics Forum | Thu May 28 23:03:15 EDT 2009 | davef
10kv on the surface of the board. To avoid this charge: * Use an electric paint sprayer to apply liquid -base conformal coating * Purchase a metal nozzle for an electric spray gun so that it can be connected to ground * Use a nuclear ionizer where th
Electronics Forum | Fri May 29 23:19:46 EDT 2009 | isd_jwendell
I too have heard of the ESD problem when using aerosol spray conformal coating, but I haven't found any documentation. I have been spraying SR conformal coating for ~ 10,000 boards with no failures due to the coating. The person spraying is grounded
Electronics Forum | Thu Jun 04 14:35:11 EDT 2009 | floydf
We wound up using a ramp to spike profile with 50 sec. between 150C and 217C and 90 sec. above 217C. The idea being the flux is still active when it hits reflow, and it stays in reflow long enough for the weird alloy in the parts lead to wet. All par
Electronics Forum | Mon Jun 01 22:56:39 EDT 2009 | davef
Reflow soldering de-ages the capacitors. Two things may be affecting your testing. * Capacitance measurements are often erratic during testing for about 10 hours after de-aging. * Test limits should be set so that the capacitance value is within the
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