Electronics Forum | Mon Jan 31 14:08:26 EST 2000 | Ashok Dhawan
I have got a number of assemblies back from a customer with feedback that the solder fillet is less than 25% of chip height per IPC-Standard-610B Class 2. Most of my joints are having good wetting but fillet height does not meet min ht requirement of
Electronics Forum | Wed Jan 12 20:20:54 EST 2000 | Bene
I had the opportunity to spend time with a demo and one on one with the inventor of the Ersa scope inhouse a few months ago. I see the scope complimenting X-ray inspection but not as a substitue. It allows you to view attributes of a solder joint t
Electronics Forum | Mon Dec 13 21:11:53 EST 1999 | Curtis T.
Steve, I have done countless board profiling and oven reflow profiles. Here are the critical factors on you need to address. What is your board surface finish, if it is something like an OSP it will need a good amount of an active (aqueous) flux to
Electronics Forum | Thu Dec 16 16:46:47 EST 1999 | Mike Naddra
Steve , I use a general set of guidlines when developing reflow profiles: Ramp rate to 140 deg C - 50-60 seconds Time at preheat (140-160 deg C) - 90-120 sec Time above liquidous (183 deg C) - 45-90 sec Time at peak (215-225 deg C) - 9-12 sec peak t
Electronics Forum | Fri Nov 12 08:55:43 EST 1999 | Wolfgang Busko
Hallo Edmund, what does dull mean in your case ? It�s nearly impossible to say something about it without more information. Dull or shiny isn�t a clear or better no indicator for good or bad. Some companies add other metalls to the solder to get rid
Electronics Forum | Wed Sep 29 23:54:07 EDT 1999 | Dreamsniper
Hi everyone, Greetings! I�ve got a 2-layered through-hole PCB�s having the following problems: Solder Mask peels after wave soldering at random locations and only at the bootom side of the PCB Insufficient Solder and some solder never make it to t
Electronics Forum | Thu Sep 30 12:29:01 EDT 1999 | Dave F
| Hi everyone, | | Greetings! | | I�ve got a 2-layered through-hole PCB�s having the following problems: | | Solder Mask peels after wave soldering at random locations and only at the bootom side of the PCB | Insufficient Solder and some solder ne
Electronics Forum | Thu Sep 30 21:37:44 EDT 1999 | Dreamsniper
| | Hi everyone, | | | | Greetings! | | | | I�ve got a 2-layered through-hole PCB�s having the following problems: | | | | Solder Mask peels after wave soldering at random locations and only at the bootom side of the PCB | | Insufficient Solder an
Electronics Forum | Wed Sep 22 22:21:31 EDT 1999 | JAX
| Hi All, | | We have 19 Siemens machine running here and lately I was assigned to come out with a proposal on the wrong part issue on Siemens Machines. All of our machines are equip with siemens part verification in which there the part barcode is
Electronics Forum | Wed Sep 22 21:23:03 EDT 1999 | se
| | I've had some trouble pasting a test board for a MicroBGA trial. Most of the paste remains in the stencil apertures. | | The stencil is 6 mil thick, laser cut and electo-polished. | | The apertures are 12 mil in diameter with 20 mil pitch. | | We
