Electronics Forum | Tue Sep 25 14:25:30 EDT 2001 | davef
Points in response are: * Microstencils work fine with paste, although they are a little fussy to use. * Never have used microstencils for flux. * Like Hussman, we dab the uBGA into a puddle of tacky flux and then place it on the board. * On contro
Electronics Forum | Thu Sep 27 16:11:38 EDT 2001 | flipchip
Monkey, I have read all the replies you received. I have extensive experience in reworking these parts. There are several ways to approach your problem. If the chips are bumped you will need to have a stencil to apply the flux. If the chips are u
Electronics Forum | Wed Sep 26 11:15:59 EDT 2001 | Hussman
What do you folks use for control on your wave solder process? Primarily after wave. I know there are a variety of "wave riders" that will assure proper wave solder parameters, but would like to know what down stream controls some are using. We ar
Electronics Forum | Fri Oct 05 08:35:52 EDT 2001 | Hussman
Hey Steven, Achieving the proper profile like you described does require you to engineer proper conveyor speeds and zone temps. Most conveyorized ovens have the inside of the ovens divided into zones. Each zone has a top and bottom heater that can
Electronics Forum | Tue Oct 09 20:27:13 EDT 2001 | davef
That�s a 672 BALL BGA, bud!!! It�s a BIG Mutha!!! [I know. I know. For some reason suppliers call balls "pins".] Let�s focus on: * Clarifying the units on your PCB and aluminum plate thickness measurements. * Describing your use of the aluminum pl
Electronics Forum | Mon Oct 15 23:40:43 EDT 2001 | kenbliss
One thing everyone missed is what is the goal of the company. To make money!!! So how many boards per week are you shipping now and how many would you be shipping if you had seperate stencils or a DISPENSER. With quality being number one always the
Electronics Forum | Mon Oct 15 10:57:32 EDT 2001 | davef
Before this wave solder pallet salesman blather gets too far out-of-control, let�s stop for a minute. The three major approaches you have are: 1 SELECTIVE SOLDERING: Using: * Specialty wave soldering machine to solder specific areas of a board * P
Electronics Forum | Sun Oct 28 23:32:25 EST 2001 | flynhi34
Thanks for the info on the printers. I have printed conductive epoxy on Dek 265 with great success in the past. The issue I have is that I need to attach with both epoxy and solder on the same side of the PCB. I could double print. Print conductiv
Electronics Forum | Thu Nov 01 17:35:04 EST 2001 | davef
A couple of things: * Don�t do it. Securing both the plastic case and the lead to prevent breaking the case seal is very difficult to do while you reform the lead. Just resell the parts and buy the correct parts. * If you will not listen and insist
Electronics Forum | Thu Nov 01 04:52:50 EST 2001 | wbu
Hi Brian, yes that�s possible due to the presence of Au in the joint but nothing to worry if the Ni/Au is done properly (means not to much Au in your plating). "rugged" I haven�t noticed yet, that may depend on the definition and maybe the magnifica
