Electronics Forum | Wed Oct 10 02:04:10 EDT 2007 | omidjuve
hi we use a no clean solder paste with the sn63pb37 alloy and our high frquency board doesn`t have any problem in test but after this product is finished now we use 2 different solder pastes 1. sn62 pb36 Ag.4 RA tape 2. NC type lead free with Ag i
Electronics Forum | Sun May 10 09:29:23 EDT 2009 | davef
Q1: Can I know is Chromium restricted from RoHS? A1: RoHS Restricted Substances (Pb, Hg, Cr6+, PBB, PBDE, Cd) Q2: Is this chemical will effect the content of Lead free solder? A2: It's possible that the metals that comprise the stainless steel probe
Electronics Forum | Fri Jan 27 09:00:14 EST 2012 | davef
A thermocouple is a set of two wires welded together at one end, where a junction is formed between the two wires. Because each wire is composed of a different type of metal, each wire reacts differently to the temperature of the junction. Because of
Electronics Forum | Tue Mar 06 15:59:33 EST 2007 | pima
hello I would like to ask you for advise. I have problem with one of my SMT line and skewed parts at the end of line after reflow. My line is composed: DEK, 3d visual inspection of paste printing, IP3, 8 zones reflow oven. I m builidng there produc
Electronics Forum | Mon Jul 08 22:03:39 EDT 2019 | eddy2019
Many beginners do not know how to start learning hardware circuits. In fact, the "hardware circuit" is composed of a part of the "unit module circuit". The so-called "unit module circuit" includes: various regulated power supply circuits (like the LM
Electronics Forum | Thu Nov 16 06:13:16 EST 2000 | Adam Seychell
I am currently building a home PCB etching tank based on the ammonia/ammonium sulfate chemistry. The etching system consists of a etching tank, and an electrolytic copper recovery tank. The result is a infinitely replenishable etching system without
Electronics Forum | Wed Dec 08 10:10:41 EST 1999 | John Thorup
Hi Dave I think you just provided the key to understanding the problem. By your description you are talking about a CBGA (ceramic). These typically have balls composed of 10/90 Sn/Pb which melts at a higher temperature than the 62/36/2 Sn/Pb/Ag (or
Electronics Forum | Wed Aug 18 12:35:41 EDT 1999 | Earl Moon
| | WE ARE CURRENTLY HAVING PROBLEMS REFLOWING BOARDS WITH WHITE TIN PLATING. WE ARE NOT GETTING GOOD WETTING ON THE PADS. | | WE HAVE CHECKED THE REFLOW PROFILE AND TRIED DIFFERENT PASTE'S. | | WE THINK THERE MAY BE CONTAMINATION OR OXIDATION ON THE
Electronics Forum | Thu Apr 23 20:27:41 EDT 1998 | D.Lange
| | | | I need immediate help temporary, permanent,contract or whatever. Have three quad 3c 100's, one with vision, and one 3-head Mamiya MHP 30B MarkII. Seriously need Extended PM's and regular PM if your PM schedule permits. Need permanent operator
Electronics Forum | Tue Jan 13 08:08:37 EST 1998 | Vanessa Munoz
I have recently been put in charge of our SMT line. We have to developed a SPC. My questions are: q1. What are the �most� important parameters to monitoring and which of the control charts do you usually use depending of the parameter..? Our line is
