Electronics Forum | Thu Apr 12 00:56:20 EDT 2007 | Jani
Our SMT production and storage area is air-conditioned, constant temperature is maintained but the humidity is not controlled , the raw SMT material is stored in a "Drier" cabinet, but since we assemble hybrid SMT and thru-hole PCB assemblies, the SM
Electronics Forum | Fri May 18 04:05:39 EDT 2007 | bartlozie
I'm looking for a SMT prototype & small series assembly machine, needs to be very accurate, no need for high speed. For assembly batch size 1 to 50 pcb's. The machine needs to be accurate and flexible, able to place chips 0402 up to BGA components.
Electronics Forum | Thu Jun 26 10:02:06 EDT 2008 | rdnggbsss1
I am a PCB Designer and I have to put a note on the assembly drawing to tell the assembler how to clean the board. This is new to me. Here is a sample note. Can someone give me some feedback on it? "Use water washable, no clean solder paste for t
Electronics Forum | Thu Jun 26 13:55:56 EDT 2008 | dyoungquist
Water will not remove no clean flux residues because they are not water soluble. Solder paste with no clean flux should only be used when the assemblies do not need to be cleaned. That said, you can buy special cleaning solvents specifically for re
Electronics Forum | Tue Jul 29 08:29:21 EDT 2008 | davef
Beyond the materials cost, one approach to estimating the cost of assembling a board is: 1 Direct cost * Determine the processes required to assemble the board * Separate parts on BOM according to process * Multiply number of parts in each process by
Electronics Forum | Mon Aug 04 15:17:38 EDT 2008 | willleu
what is the going rate for fine pitch (microscope) SMT assemblers? i have several opportunties available in San Diego and would like to know what to offer. candidates must also be able to identify components, read assembly drawings, and must be U.S
Electronics Forum | Fri Sep 12 08:01:55 EDT 2008 | davef
There is no standard. On the web, you can find shelf life estimates for various types of solderability protection on bare boards. These estimates won't translate directly to the storage of assembled boards, because assembled boards [and the solderabi
Electronics Forum | Thu Aug 13 03:41:30 EDT 2009 | robhs
At risk of raising a topic that has already been discussed at length, if that is the case then please point me in the right direction. We have a Lead-Free assembly that has BGA devices on both sides of the board. Any recommendations as to how we mig
Electronics Forum | Thu Aug 19 10:28:26 EDT 2010 | tpearson
We want to complete an end of life build on a leaded no-clean circuit board assembly. I was asked how long the assembly can be stored for future use. Assume it is in a temperature controlled warehouse. Boards will be placed into individual ESD bags f
Electronics Forum | Wed Sep 01 05:29:40 EDT 2010 | arjan
We baked the parts just before assembly. 2>we baked the parts and store them in 4 days in drycab (60degC, Rh0,5%)and finally assembly 3> we baked the parts and refowed them on a leadfree profile and finally the assembly on the boards. The same we als
