Electronics Forum | Thu Mar 25 19:29:07 EST 1999 | Graham Naisbitt
| | Hi, | | I have a customer who's electronic assemblies produce RF. He is insisting upon aqueuos cleaning. We switched to a no clean solder years ago and no longer have an aqueous system. | | Is aqueous cleaning necessary to eliminate 'cross ta
Electronics Forum | Mon Mar 29 19:31:29 EST 1999 | Scott McKee
| | | Hi, | | | I have a customer who's electronic assemblies produce RF. He is insisting upon aqueuos cleaning. We switched to a no clean solder years ago and no longer have an aqueous system. | | | Is aqueous cleaning necessary to eliminate 'cr
Electronics Forum | Fri Jan 29 05:14:06 EST 1999 | Graham Naisbitt
Hi guys, I really am at a loss to understand this one. It would appear that there may be some reaction between the flux and the resist? Or maybe you have an OSP on the board that is reacting during soldering? As a fast fix, maybe you should try a
Electronics Forum | Wed Nov 19 13:16:54 EST 2008 | sjpence
Simon, The equivalence factors were used to scale the values measured by ionic testing equipment to the values measured in the standard manual method. There is a good write-up by Bill Kenyon in this Technet Post describing the creating of the facto
Electronics Forum | Wed Oct 18 16:33:26 EDT 2000 | Dave F
Mike: An omega meter has very little to do with ion chromatography. * IPC TM-650, 2.3.25B, Detection and Measurement of Ionizable Surface Contaminants is a process control method that washes boards with an isopropanol / water solution and measures
Electronics Forum | Tue Oct 10 04:10:43 EDT 2000 | Tanu
Hi, Jacko is right!BGA ispection equipment like Xrays are extream expensive if you want a good system. There is some xrays that you can have low cost but if you are planning to do superBGA�s or want better image you need atleast 80-100Kv with good r
Electronics Forum | Wed Jul 05 17:06:36 EDT 2000 | Michael Parker
Patrick- You have not given enought detail of the type of discoloration. Is it "white residue"? Can it be "rust" colored? Whatever it is, you fab supplier needs to be called in immediately and give you an exact reason for this failure. Just rubbing
Electronics Forum | Fri Jul 13 19:08:55 EDT 2001 | mparker
Home plate apertures are designed to reduce or eliminate solder balls that occur when placing a chip and reflow of the solder. This aperture type is usually desired when processing with a "no-clean" solder paste. The design of the aperture is usually
Electronics Forum | Mon Feb 07 13:20:03 EST 2000 | Dave F
Graham STOP!!! You can not be totally serious. A five year old cost model counts bean, and beans are beans. I have to know more about the calculation. If this bores some of your gear-heads, click on "return." � Help me with the terms: - "Ops cos
Electronics Forum | Thu Jan 13 13:16:40 EST 2000 | Dave F
Tony: You have choices: * Hi Temperature Tape: Go with Wolfgang ... too tough to control. * Selective Soldering Pallets: Some like 'em some don't. A lot of your success depends on the pallet fabricator. * Screenable Temporary Solder Mask: Wol