Electronics Forum | Fri May 15 21:59:42 EDT 1998 | Earl Moon
| Hi, | There has been a lot of disputes in our company | about changing present HASL to another Finishing | which can provide more flatter pad surface in fine | pitch applications. ( perhaps Ni/Au, OSP ) | The target is to reduce solder defects, t
Electronics Forum | Wed Feb 02 20:53:34 EST 2000 | Dave F
Dennis: Several points: 1 If you're talking AlphaLevel process (?): � Good solderability, as HASL, even no-cleans bite well. � Planarity, uniform deposit, no bridgin� of FP. � Doesn't store as well as NiAu ... LT 6 months sealed � Very sensitive t
Electronics Forum | Sun Jan 28 13:26:27 EST 2007 | Sweet Old Bob
Okay you CM haters I don't see anything about the design of the board, other than OSP which is strike one. What is the board size? What is the board thickness? Where is the BGA located on the board? What is your ball to pad ratio? What is your aspect
Electronics Forum | Wed Dec 28 16:03:53 EST 2005 | Chris
I have lots of experience with thermosonic gold ball bonding. You can read the literature and you will probably find some papers that say you can do it. I have never been able to do it. We gold ball bond all day long with little problems at all bu
Electronics Forum | Wed Mar 11 11:05:06 EST 1998 | Earl Moon
| I am having a problem with Entek coated boards. The solder past seem to just ball up on the pads. I had no problems with the board when it was hot air leveled. The board is double sided surface mount. I have tried adjusting the oven profiles mak
Electronics Forum | Sun Mar 15 23:58:01 EST 1998 | Phill Hunter
| | I am having a problem with Entek coated boards. The solder past seem to just ball up on the pads. I had no problems with the board when it was hot air leveled. The board is double sided surface mount. I have tried adjusting the oven profiles m
Electronics Forum | Thu Sep 02 10:00:29 EDT 2004 | russ
If you are concerned about shelf life and handling of raw or partially assembled PCBs use Immersion gold and hope that you don't get black pad, I still love this finish but I have been fortunate to never receive bad boards. If I understand your ques
Electronics Forum | Thu Feb 22 20:34:25 EST 2007 | davef
This [ http://www.smtnet.com/library/index.cfm?fuseaction=view_article_html&file=no_hasl ] describes HASL [hot air solder leveling], as well as other common types of solderability protection. It goes on the discuss the impact of the use of these coa
Electronics Forum | Tue Jul 15 16:12:23 EDT 2008 | boardhouse
Hi Armynski, I sell for an offshore board house, yes, it is common for offshore board shops to fill vias. The bubble is caused by air entrampment within the hole it self, when heat is applied during Hot air and the via is covered on both sides the e
Electronics Forum | Mon Apr 26 16:14:08 EDT 1999 | John W
| Hi Murray! | | Justin pretty much summed things up...covered all the points. So I'm just gonna give you my preference of what I like other than HASL finish. | | Electroless Nickle/Immersion Gold...nice flat pads...hmmmmmmm, Steve likes flat pads.
