Electronics Forum | Wed Jan 19 22:28:20 EST 2000 | Dave F
Taking things from a slightly different angle: Cost of assembling various packages based on volume: C/R placement: |$0.01 to 0.04 per part SOIC: | $0.03 PLCC based on lead count: | 20-39 $0.16 | 40-59 $0.18 | 60-79 $0.20 | 80-
Electronics Forum | Thu Jan 20 02:36:29 EST 2000 | erico
Hi wolfgang,Dave & PC: What I facing are: 1. The component lie flat on the board but only one side can get solder.The pad is ok, problem is with the chip. 2.I desolder the chip and go to view it under microscope and found that there is a line near t
Electronics Forum | Fri Jan 14 16:21:42 EST 2000 | Dave Chapman
We are having mid chip solder balls on chips and resistors. Seeing the problem on 80% of the assemblies we run. Anywhere from 1 to six of the balls per board. We have slowed the oven down, increased the pressure on the screenprinter to get less paste
Electronics Forum | Fri Jan 21 10:40:15 EST 2000 | Dave Chapman
Having adjusted the profile speed slower and adjusting the temps to the recommended lower levels, amazingly the mid chips have almost disapeared (90%). It appears they have been trying to run a "1 profile fits all" on the ovens for Alpha 737 and UP78
Electronics Forum | Fri Jan 14 10:11:45 EST 2000 | John Thorup
I'll have to go along with Wolfgang as having a good experiance with frameless. We have been using a system from IIT in California for about a year. I was sceptical at first because of this system's X only tensioning but it does work. We use mostl
Electronics Forum | Fri Jan 14 09:17:08 EST 2000 | Wolfgang Busko
You need to have the right cutter for that and the necessary skill too. "Erem" a company from switzerland does have a very good cutter for that. I�ve seen cutting done with high speed miniflex ( those dentists tools ) too. Desoldering with a minitip-
Electronics Forum | Fri Jan 07 19:22:29 EST 2000 | Dave F
100 MHz or Mbps and BT => BaseT => Base Ten. You can purchase interface cards from a variety of sources on the net (www.milestek.com is fairly maroon compliant, which is why I like 'em). In addition to the interface card, each type of point-to-poin
Electronics Forum | Wed Jan 05 14:21:27 EST 2000 | Glenn Burson
I have the opportunity to pick up a used 1998 Heller 1900WN reflow. I have no experience working with Heller reflows, nor have I heard much about them, so I don't know if they are good quality machines or not. I have concerns about issues such as z
Electronics Forum | Wed Jan 05 15:00:23 EST 2000 | Brian E. Steelglove
Dear Jacob, I have a company that makes a really cheap but great depanelizing machine and one to get rid of the tabs on a routed FR 4 board. I saw them at the assembly expo in Chicago. The cost is under 2,000 dollars and works well. I think it mig
Electronics Forum | Tue Dec 28 12:34:03 EST 1999 | Justin Medernach
Jim, I wouldn't sweat a TCE mismatch between Ceramic chip components and FR4. No need to worry. 99.5% of consumer product out there utilizes this exact technology with no threat of failure due to CTE mismatch. The terminices of the components occu
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