Electronics Forum | Mon Apr 19 02:45:31 EDT 1999 | Brian Sloth Bentzen
| | We process both tin/lead plated boards and gold plated boards in our surface mount group. I have used Sn62/Pb36/Ag2 solder paste on all gold plated boards to help prevent gold scavaging. To reduce the amount of different solder pastes we have t
Electronics Forum | Mon Feb 22 13:39:22 EST 1999 | Justin Medernach
| Can anybody give me the Pros and Cons of of using Cartridges over jars and/or vice-versa. Also, if using cartridges, what is the best way to keep the paste from seperating, short of buying a mixer that cost over $5000.00 | Thanks, | Bill | Bill,
Electronics Forum | Fri Feb 19 00:32:40 EST 1999 | ZEEK
| We are using .040" diameter fiducials (global and local) on our boards. They are solder covered and HASL. I get batches of boards where the p&p vision system has trouble reading the fiducial. The fiducial looks dark on the screen. The board ven
Electronics Forum | Fri Feb 19 14:44:24 EST 1999 | Lance A. Smalley
You don't say what kind of machine you are using but several just use the edge of fiducials to determine area (and centers). If you are teaching in binary and have the ability to select a decision level (threshold), use a level half way between loss
Electronics Forum | Mon Jan 04 23:15:35 EST 1999 | Kris Ewen
Where I worked, we used 0.014" square aperatures (several mfgs. have proven the benefits of square & I've seen a better transfer efficiency myself). Some mfgs use smaller edge lengths & have had success. 0.005" thick stencils give better transfer e
Electronics Forum | Wed Dec 09 19:21:13 EST 1998 | Bill Schreiber
Dave, Be careful if you plan to clean misprinted PCBs in a spray type batch cleaner. There is an article written by Dick Clouthier of AMTX Stencils regarding batch cleaners and their use for cleaning misprints. He describes it as a "solder ball nig
Electronics Forum | Wed Jul 22 10:21:46 EDT 1998 | Dave F
| Hi all, | I am new to SMT. In past I've made many PCB boards with my small hands at home, but I've used regular technology drilling the holes for the components. | I am trying to use SMT for my projects. SOP packages I was able to solder using a re
Electronics Forum | Fri Jan 30 14:18:24 EST 1998 | M cox
| | Using metal squeegees on GSPs has caused premature stencil wear. Has | | anyone had any success with this combination? How much snap off did you | | use? We are using .5 mm pitch and have a no clean process. | I have been using lots of metal
Electronics Forum | Mon Dec 29 09:37:25 EST 1997 | Craig Wilmer
| Can anybody give me feed back on the pro and cons of | using Pace, OK, Hakko, Metcal, etc... Kris, Pace is going to be your best bet when it comes to productivity. I used to do rework and repair for Compaq and all of the PCA lines in their manufa
Electronics Forum | Tue Apr 01 09:03:39 EST 2003 | kmorris
Hi: I'm looking for input from anyone who has experience assembling the MLP package on PCBs. We are experiencing solder opens after assembly, and I'm curious to see how others are processing these critters. The part we are using is a Semtech SH3000
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