Electronics Forum | Mon Aug 07 14:02:54 EDT 2000 | Brian W.
If you are satisfied with the apertures, then you need to check placement pressure, plant humidity, and the reflow profile. If the placement pressure is too great, it will separate minute portions of the solder from the pad. When the solder reflo
Electronics Forum | Thu Aug 03 19:49:16 EDT 2000 | Darby
I presume you have no vision alignment. Buy yourself a little monocular measuring microscope ( about $100 ). You are not going to get the registration you require between stencil and pcb for each print if you are running off tooling pins , edge clamp
Electronics Forum | Thu Jul 13 05:23:30 EDT 2000 | Donnie
There a few questions that I have for you. 1. What type of flux are you using? 2. What temps are your preheaters set at? 3. Can you possibly place them on after the wave? The reason I'm asking is that there may be some adjustments to the wave to bur
Electronics Forum | Thu Jun 22 11:01:54 EDT 2000 | Chrys Shea
Jason, Double sided reflow should be no problem. People have been doing it for years. The surface tension of the molten solder will hold the components on the bottom side during your second pass. This is almost always the case, unless you have re
Electronics Forum | Thu Jun 22 11:02:13 EDT 2000 | Chrys Shea
Jason, Double sided reflow should be no problem. People have been doing it for years. The surface tension of the molten solder will hold the components on the bottom side during your second pass. This is almost always the case, unless you have re
Electronics Forum | Fri Jun 02 17:19:56 EDT 2000 | Big K
I am currently experiencing several problems with QFP's on one of our IP3's. The first problem is with QFP240 devices. We are experiencing a high reject rate with these parts when using vision type 100. What appears to happen is that the vision syste
Electronics Forum | Fri Jun 02 10:07:15 EDT 2000 | aflewelling
A new and more powerful search function will be in place on SMTnet by noon Friday June 2nd. The new search feature allows you to search all of the SMTnet components individually and have the results displayed to you more quickly than under the prev
Electronics Forum | Tue May 30 11:51:43 EDT 2000 | JAX
Sal, I have seen this problem placing SMT connectors which exceed 60mm in length. Although I did not use siemens equipment at the time I am not sure if they will place enought force to seat the entire connector flush to the board. They have a maximun
Electronics Forum | Mon May 29 02:15:06 EDT 2000 | Dreamsniper
Hi Buddy, We've tried shifting to this process before and from our point of view here are some of the advantage and disadvantages that we discovered. Advantage 1) Cheap Equipment cost as you just need to use your Solder Paste Printer rather than buy
Electronics Forum | Thu May 18 22:00:38 EDT 2000 | Dean
...ahh....memory lane. 10 years ago I worked on a project for a customer who needed a low cost, high volume board for RFID tags for cows (yes, moo). These boards were 0.50 inch in diameter, 50 per panel, double sided SMT punch style fabs. 300,000 b
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