Electronics Forum | Wed Sep 20 19:44:04 EDT 2000 | David Harper
We have the very same problem.. In our next job our assemblers will be placing 2 million PTH LEDs. Fortunately we get all out LED's from the same manufacturer and hope they come in bags. If not we gotta cut them off the tape.. and well... that just m
Electronics Forum | Wed Sep 20 19:46:31 EDT 2000 | David Harper
We have the very same problem.. In our next job our assemblers will be placing 2 million PTH LEDs. Fortunately we get all out LED's from the same manufacturer and hope they come in bags. If not we gotta cut them off the tape.. and well... that just m
Electronics Forum | Mon Aug 28 17:54:59 EDT 2000 | Steve Thomas
We're trying out 0603 packages on some 0805 footprints (at this stage only on some test boards) since our vendor tells us the 0805's are going to be getting harder to get, and more expensive to pay for. I understand the IPC footprint for the two is
Electronics Forum | Mon Jul 24 18:19:08 EDT 2000 | Darby
Nick, Like John says, it will only be a short time and you will "just know". In the meantime you might want to try - 1. All the placement machine manufacturers have show pcbs for the exhibitions, many of these show pitch and package types on the silk
Electronics Forum | Wed Jun 28 12:37:05 EDT 2000 | Brian W.
HASL plating, by its very nature, is inconsistent in terms of thickness and consistency. The plating varies from spot to spot on the pad, as well as pad to pad. This will wreak havoc on your screen printing process and your placement. From talking
Electronics Forum | Thu Jun 22 12:06:10 EDT 2000 | Wolfgang Busko
Hi Sal, I assume your homeplates are designed with the peaks towards the componentcenter. I can imagine that due to placement inaccuracy not both sides sit in the same amount of paste and that wetting difficulties prevent same force factors for both
Electronics Forum | Fri Jun 02 16:30:42 EDT 2000 | Michael Parker
I found a reference to Cost of Conversion earlier this year. Basically, the average cost to convert a single component from raw materials to assembled goods is $.08, just after pick and place. After placement and before reflow, repair (solder paste r
Electronics Forum | Tue May 30 09:52:21 EDT 2000 | Sal
Problems with dry joints on a 184 pin Berg connector with locating pins.Using a 0.005"screen, on a n-tek finished board and using Nitrogen. The problem is really intermittent.We tryed using a variety of placement forces using our siemens F5. The comp
Electronics Forum | Mon May 22 12:04:03 EDT 2000 | Michael Parker
80%. There are too many factors at hand to point the finger yet. We need to build a truth table and dot the i's and cross the t's before stepping up to Goliath (Samsung). Is you placement guranteed good? What x-ray have you used? Are your fab.'s know
Electronics Forum | Mon May 22 16:50:50 EDT 2000 | Kathy Palumbo
Mike, Is that greater than 80% yeilds, or less than? Here are the answers to your questions: Is you placement guranteed good? YES What x-ray have you used? Nicolet Are your fab.'s known good? YES Could you de-solder Samsung and replace with ano
