Electronics Forum: level (Page 103 of 232)

High frequency application board V.S rework CSP

Electronics Forum | Fri May 30 13:26:13 EDT 2003 | caldon

Ben- My understanding of Tacky Flux is for Automation process where the Tacky Flux helps hold the component in place. If you are using a rework system that holds the Board firm..then typical no clean flux (Flux Pen) should work fine. I can only asum

room standard of PCBA workshop,for example temperature,humidity

Electronics Forum | Tue Jun 10 11:07:33 EDT 2003 | fmonette

Another important element to consider is the impact of ambient temperature and humidity on Moisture Sensitive Components. The majority of plastic encapsulated ICs are classified as moisture-sensitive devices (MSD). This means that they are qualifie

Optimal Speed for Universal Chip Shooters

Electronics Forum | Wed Aug 27 14:45:08 EDT 2003 | M. Cruise

Todd covered it all. And you will have a hell of a time verifying all that. BUT he is perfectly correct. I have worked on such problems and boy are they difficult to trouble shoot. But one time the problem was found to be "the height of the machine".

Repairing balls on BGA's

Electronics Forum | Wed Jul 09 10:55:51 EDT 2003 | Veronica

Hi Reman01, I have done that before when I was in Motorola. What kind of ball are you trying to repair? How many pieces of BGA chip do you need to repair a day? If it is not too many, you can do it by yourself. It is a lot, such as 100 to 1000 piece

BTU VS HELLER REFLOW OVENS

Electronics Forum | Tue Jul 29 21:06:14 EDT 2003 | Dean

It is important to measure each brand by class. Example: Measuring a top of the line BTU vs. an entry level Heller would not be fair or solve your problem. Each maker has models to satisfy all market segments. I have both brands in my factory. I

Epoxy Covered PCBAs Means to prevent hacking?

Electronics Forum | Wed Sep 24 20:04:44 EDT 2003 | Michel Moninger

http://www.mgchemicals.com/products/832.html Loctite makes a version too, if I recall. Designed to be tamper evident, but yes, rework is a bear. We had similar results using one of Lord Chemical's urethane potting compounds. It was a filled black fi

MPM Accuflex

Electronics Forum | Tue Oct 14 22:52:57 EDT 2003 | fastek

That's not a fair comparison. It's like putting a Ferrari next to a Volkswagon and asking which one you would choose if they both cost the same. The Infinity is a top of the line offering from DEK. The Accuflex is MPM's entry level machine for fully

audio

Electronics Forum | Tue Nov 25 15:57:27 EST 2003 | tdurston

I've got lots of questions: 1.- What kind of support are you seeking? - Web URLs, books, technical advice, etc?? 2.- What is the scope of your project - an audio system can be small or huge? 3.- What are your technical specifications (watts per chann

Need help on PCBA Cleanliness Standards and Specs

Electronics Forum | Tue Nov 25 16:26:43 EST 2003 | tdurston

We are trying to establish requirements and process controls for completed, cleaned SMT assemblies. We have problems with our high impedance circuits (100 meg ohms) being affected by residue. Some boards require additional cleaning cycles to remove

Moisture Sensative Components

Electronics Forum | Thu Feb 05 15:38:21 EST 2004 | mrmaint

Pete C We do bake our tray parts. I am familiar with the ipc specs. The problem is for example: a level 4 component can only be out a total of 72 hrs before rebake is required. If this is a tube or reel part, the 125c bake temp that is recommended wi


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