Electronics Forum | Mon Sep 30 09:00:26 EDT 2002 | arcandspark
Russ, I have been reworking BGA's for over five years now and have never been able to remove voids in the solder balls without removing the BGA itself. Your thermal profile can also cause the voids along with a poor solder paste. I have experimented
Electronics Forum | Mon Sep 30 09:47:37 EDT 2002 | Zoran
Hi, I was wondering whether anyone could explain to me, point me in the right direction or send me a schematic on how to build Current Amplifiers. I am building a automated temperature controlled cooling unit and I need to build a current amplifier
Electronics Forum | Wed Oct 09 17:50:09 EDT 2002 | alj
Wrong..! It is a money loser for Teradyne and it will be cut in the future. Wow, auto thermal profiling.. Gee, that is a little late. When will the summit platform be redesigned. It's the same thing they sold 10 years ago with a few modificati
Electronics Forum | Mon Oct 21 08:46:15 EDT 2002 | davef
60% ||||36% of ball area|| >36% ||Class2|| Accept|| Reject ||||45% of ball diameter|| >45% ||||20.25% of ball area|| >20.25% ||Class3|| Accept|| Reject ||||30% of ball diameter|| >30% ||||09% of ball area|| >09% II. Missing Ball: This is prohi
Electronics Forum | Mon Jan 20 09:55:09 EST 2003 | Claude_Couture
The carrier tape and cover tape of static sensitive components are either conductive or dissipative. as for the P&P machine, as long as they are made of metal and grounded, static buildup is not an issue. All PCB conveyors I've seen have static condu
Electronics Forum | Wed Apr 09 14:09:54 EDT 2003 | davef
MA/NY DDave, I'll take your money. I'm betting on the Class II, whatever that is, because: * Solder is the same. * Board is the same from a fabrication and probably materials standpoint. * Components are the same. * Processing is the same. ... but
Electronics Forum | Wed Jun 25 09:42:09 EDT 2003 | caldon
SR. Here is a shot in the dark but have you try'd KNS? I know they have been working on some cool polymers...send them a note as they may have something that meets your needs. They may not have anything that can be removed but it is worth a try. pol
Electronics Forum | Tue Sep 09 00:51:33 EDT 2003 | iman
everyone made good observations in the arena of improvements. being rather pessimistic today, I'd like to say the one core area of little (if none at all) improvement is the over-reliance of human (aid/non-aid) inspection of SMT output soldering de
Electronics Forum | Sat Sep 06 21:50:09 EDT 2003 | Hoss
Sr. Assuming you are processing the garden variety 63/37 paste on FR4 substrates, a good starting point is to plan for 3.5 to 4.5 minutes of process time on the board. If you measure the total heated length of your oven and you use the range above,
Electronics Forum | Tue Sep 09 18:07:18 EDT 2003 | davef
We would be very wary of allowing 50 uinches, because this will likely result in reduced shelf life due to intermetallic growth. As a guesstimate, at least 10 uinches of that 50 uinches, and maybe more, is already intermetallic when you receive the b
