Electronics Forum | Wed Sep 20 19:46:31 EDT 2000 | David Harper
We have the very same problem.. In our next job our assemblers will be placing 2 million PTH LEDs. Fortunately we get all out LED's from the same manufacturer and hope they come in bags. If not we gotta cut them off the tape.. and well... that just m
Electronics Forum | Thu Sep 14 13:34:43 EDT 2000 | Boca
Of course the others have great answers, try NOT to do it, for all of their reasons. However, had to do it in the past, OEM, custom chip, die wouldn't fit in a SM package, volume wouldn't support a second package type ...... and on and on. So we us
Electronics Forum | Mon Sep 11 14:07:26 EDT 2000 | Steve
Hi ya'll!! We've got some PCB's in receiving inspection that has these little nodules in plating inside all of the barrels. These are microwave PCB's and have almost all of the surface area on both sides covered with with solid metal planes, and no
Electronics Forum | Tue Sep 05 16:04:43 EDT 2000 | Dave F
Pascal: Responding to your questions: 1 Do we have to dry the PCB after cleaning (sic)? Generally, nothing says you have dry the PCB after aqueous cleaning. Along this line, I received several thoughtful responses when I posted a similar thread.
Electronics Forum | Wed Aug 30 00:16:15 EDT 2000 | Craig
We are reflowing ceramic resonators and are finding their tops falling/popping off when handling the pcbs during final assy. The epoxy seems to be coming off the components base and adherring to the lid. The components are "RFM resonators", case type
Electronics Forum | Thu Aug 31 04:25:03 EDT 2000 | Chris May
Dougie, If you have square, rectangular etc; shaped PCB's maybe you could have routing between circuits. "V" shaped grooves top and bottom. I found this extremely good especially if the assemblies are wave soldered. No gaps for flowing up and over.
Electronics Forum | Mon Aug 28 17:54:59 EDT 2000 | Steve Thomas
We're trying out 0603 packages on some 0805 footprints (at this stage only on some test boards) since our vendor tells us the 0805's are going to be getting harder to get, and more expensive to pay for. I understand the IPC footprint for the two is
Electronics Forum | Mon Aug 28 15:34:19 EDT 2000 | Steve Harshbarger
Hello Ramon, This is a very common problem that usually can be overcome. Can you tell me the flux type you are using (manufacturer, and flux number)? Has your board vendor, or type of PCB's changed (are they entec coated - bare copper)? What is t
Electronics Forum | Wed Aug 30 09:56:37 EDT 2000 | NLykus
Hi Ramon, We have had this problem before on our Seho Wave Solder Machine. We are currently using a spray fluxer as well. By imersing the PCB into the flux you stated you are getting good results. What you need to do is check your spray patter
Electronics Forum | Mon Aug 28 14:12:51 EDT 2000 | Earl Moon
1/4 thimble! Obviously, you read none of may articles. HASL has more than a simple topographical problem, and so on. You also would know that TCE, while being an important issue, can be overcome as a problem with optimized pad designs. You would kno
