Electronics Forum | Wed Dec 21 22:59:23 EST 2005 | Joseph Khiew
Dear all, If anyone familiar with the banned substance, Thiourea which is used during chemical solution of pcb with immersion tin. We have check with some of the labs but they are unable to provide such test report for the thiourea content on bare p
Electronics Forum | Sun Apr 08 14:15:24 EDT 2007 | davef
Look here: * http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=496035 * http://www.emeraldinsight.com/Insight/viewContentItem.do?contentType=Article&hdAction=lnkpdf&contentId=878290 * http://www.smta.org/knowledge/proceedings_abstract.cfm?PRO
Electronics Forum | Thu Aug 31 08:47:33 EDT 2017 | hxamalia
Hello Hetal, Good day , it is Amalia from HX Circuit Technology Co.,Ltd in China, we are a prefessional PCB factory with many years. We forcus on producing Aluminum PCBs for LED , please contact with me now ,thanks Email: amalia@hx-circuit.com Sk
Electronics Forum | Wed Jul 12 21:47:41 EDT 2000 | Dave F
Celiav: Mark is probably spot-on on his comments about a board fab problem. It is weird that you have similar problems from two suppliers though. Recommendations are: � Get rid of any bird brain contractor that installs processes that affect your
Electronics Forum | Wed Nov 12 09:32:30 EST 2008 | markhoch
Are there better options? Dude, EVERYTHING else is a better option. Gluing aluminum foil down to the bare copper would be a better option. ENIG (Electroless Nickel Immersion Gold), Immersion Silver, Immersion Tin, and OSP all provide flatter surfac
Electronics Forum | Mon Apr 27 14:39:38 EDT 2015 | davef
Anirudh: When board fabs talk "surface finishing" they're talking about the solderability protection that you'd like on the solderable copper component mounting pads that you laid-out for each component: * Bare copper pads corrode very quickly * Corr
Electronics Forum | Thu Jun 16 17:02:40 EDT 2011 | boardhouse
The finish looks like Immersion Tin or Silver. if its lead free Hot air - could be issue of to high of a Tin Content. find out what brand of Hasl they are using. SL100 Example. Is this tarnished look only being seen after assembly or have you seen
Electronics Forum | Mon May 14 13:33:36 EDT 2007 | jax
Solderability!!! The CM in question has probably seen too many solder problems with White Tin in the past. We have had the same issues. To save us from spending too much time and money(verifying pure Tin plating thickness, Chemical leaching from th
Electronics Forum | Fri May 18 15:07:56 EDT 2007 | jbecircuits
Thank you for all your help. I help all my customers to understand more about the production of their parts. I even build free parts using 3-4 different finishes so they can evaluate the parts. In working with CM's many of them are always asking us t
Electronics Forum | Mon Jun 18 21:21:25 EDT 2001 | davef
Two things: 1 A flat surface will probably help the "balls on the socket sliding off the ridge of HASL" problem, but possibly consider less risky choices for your flat surfaces that immersion silver, like: OSP, ENIG, and immersion tin. 2 Don�t throw-
