Electronics Forum | Tue Jun 17 12:57:26 EDT 2008 | sleech
You are correct. For the 70 deg. C drying temperature to be effective, the relative humidity must be as near to zero as possible. A pulling a vacuum on the chamber is an inexprensive and reliable way to accomplish this. Contrary to some claims, our e
Electronics Forum | Fri Nov 05 11:30:53 EDT 2010 | deanm
We have a Quad QSV-1 pick and place machine that has performed fine for us with the exception of cylindrical glass (MELF) type diodes. The machine often fails to pick these out of the tape to the point where it is easier to hand place them. As far
Electronics Forum | Sat Apr 21 08:26:57 EDT 2007 | Cmiller
Has anyone experienced a problem with conformal coating adhesion to IS-410 boards? We are having problems with one suppliers boards. IS-410 boards from other suppliers are fine and all FR-4 boards that I have looked at are fine. We are using Conap
Electronics Forum | Tue Nov 01 10:06:00 EDT 2011 | davef
Humiseal says: Typically, there are three main approaches to avoid coating wicking into press-fit connectors (and other keep out areas). Wicking is a phenomenon caused by a combination of low viscosity of conformal coating material and strong capilla
Electronics Forum | Thu Dec 22 10:51:12 EST 2005 | killer1994
Yes, I have been using it for 4 years now. We have the 4 axis, 3 head, 2 lines. Inspection station and ir oven. I have to say you will NOT get better support anywhere in this industry than from PVA. Their crew is top notch, always going above and bey
Electronics Forum | Wed Feb 10 08:10:26 EST 2010 | davef
Here is a posting by P Kinner at Humiseal ... Typically, there are three main approaches to avoid coating wicking into press-fit connectors (and other keep out areas). Wicking is a phenomenon caused by a combination of low viscosity of conformal coa
Electronics Forum | Fri Feb 06 03:56:47 EST 2004 | JaMi Smith
BGAs and QFPs packaged in Trays are oriented with Pin 1 or corner A1 oriented towards the Pin 1 identifier on one corner of the Tray, which is usually identified by a chamfered corner. The Trays themselves are usually governed by JEDEC Registered Ou
Electronics Forum | Fri Jan 15 15:06:30 EST 1999 | Earl Moon
| Hello, | | We are qualifying new sources of PWB vendors. We've got the first lot of "produciton" boards in and we want to put them through the paces before turing the vendors on. | | So far, the tests I can think of performing, and that we have
Electronics Forum | Fri Jan 15 15:17:21 EST 1999 | Earl Moon
| | Hello, | | | | We are qualifying new sources of PWB vendors. We've got the first lot of "produciton" boards in and we want to put them through the paces before turing the vendors on. | | | | So far, the tests I can think of performing, and tha
Electronics Forum | Tue Jul 23 12:02:17 EDT 2002 | gdstanton
Ken, Excellent discussion!!! I've also seen this problem. Spent and am still spending significant time policing. I don't think it is just a buyer issue though. There are many dimensions to the problem. Suppliers, Engineering, Manufacturing, and
