Electronics Forum | Tue Aug 24 21:52:06 EDT 2004 | rose
recently I met one very interesting issue with my board and connector. substrate of the board is copper with immersion silver, pad size is about 3x1mm. we print lead-free paste on the pad, then put the connector on the paste. The board was reflowed u
Electronics Forum | Wed Aug 25 21:25:28 EDT 2004 | davef
First as a nit, your �substrate� is probably NOT copper. It�s probably FR4 fiberglass/epoxy. Substrate. Base Material. A supporting insulating material upon which parts, components, and elements are attached. Second, enough of that, on to your i
Electronics Forum | Wed Sep 08 06:11:24 EDT 2004 | Rob
Hi Peter, We're typically seeing 60% on the average subcontract job, but on high volume, high density & well laid out boards we are seeing up to 95% on our chipshooters. The things that usually kill the speed for us are: multiple circuit panels (3
Electronics Forum | Wed Aug 25 20:48:17 EDT 2004 | rose
Hello recently I met one very interesting issue with my board and connector. substrate of the board is copper with immersion silver, pad size is about 3x1mm. we print lead-free paste on the pad, then put the connector on the paste. The board was refl
Electronics Forum | Thu Aug 26 16:48:37 EDT 2004 | davef
You're correct. Operators shouldn't be doing "touch-up". [No value added] Take that as your clue for areas to improve process. Babbling about touchup: * Left to itself, touchup feeds on itself, operators are parinoid that inspectors will "ding" th
Electronics Forum | Fri Aug 27 00:26:14 EDT 2004 | charly
hi, encounter few cases PCB was delam after reflow, and the supplier was refuse that this is a PCB manufacturing defect as the fallout is low within one lot. the cost for this scrap is high after PCBA level, my query here are 1) is there any way
Electronics Forum | Fri Aug 27 12:00:54 EDT 2004 | pemnut
Looking in My book, it describes "E" in the last data field as follows. Load error. This function code is not programmed as part of a pattern step. The controller uses the E code as an error marker. While a pattern program is being loaded into memory
Electronics Forum | Mon Aug 30 16:07:06 EDT 2004 | Shean Dalton
Hi Chen, Based on your posted message, the following ideas are for your consideration: "brown residue" The water soluble solder paste you are using could be a water soluble rosin solder paste formulation. Perhaps the solder paste may not be proper
Electronics Forum | Mon Aug 30 15:41:35 EDT 2004 | Frank
Hi, In 2006 we will need to produce Lead free PCB and for now it's hard to get answer to my questions. I'm from Canada and the PCB vendors we actually have are not ready to produce Lead Free PCB ( HASL Lead Free ). For sure OSP (Entek) is not good
Electronics Forum | Wed Sep 01 03:13:15 EDT 2004 | laxman
Here I want to ask 1. Is Lead Free soldering really meaningful when the total lead content in the PCBA industry is less than 0.02% when compared to the other industries?. 2.The lead free soldering transition has to take place in the following indust
