Electronics Forum | Sun Jan 24 06:44:31 EST 1999 | Kallol Chakraborty
| | Could anyone send me equations to calculate controlled impedance of traces on circuit boards. I am most interested in the buried traces in multi layer boards. | | | | Thanks, | | David - piengr@verinet.com | | | As one of the first MLB impedan
Electronics Forum | Fri Jan 22 18:05:44 EST 1999 | David
Could anyone send me equations to calculate controlled impedance of traces on circuit boards. I am most interested in the buried traces in multi layer boards. Thanks, David - piengr@verinet.com
Electronics Forum | Wed Dec 08 14:44:13 EST 1999 | John Thorup
Hi Chuck We make precision analog and hybrib audio processing equipment for the radio and TV broadcast industry. We have not experienced any problems relating to no-clean reflow since the introduction of the process several years ago. It is known t
Electronics Forum | Mon Feb 18 15:20:43 EST 2008 | kennyg
A PCBA contains a couple of parts that are not sealed and can't be water washed. We hand solder these with no-clean after everything else is water washed. The designer says the no-clean residue must be completely removed so that it will not affect
Electronics Forum | Mon Feb 18 15:47:42 EST 2008 | ck_the_flip
In theory, no clean flux residues are electrically benign...period. Here's a good test. Subject the board to some moisture/humidity, and have your circuit designer ohm-out any areas that may be affected by conductive material. Option B: Have a la
Electronics Forum | Tue Feb 19 09:26:54 EST 2008 | jdengler
The low solids flux that is commonly called no-clean can affect some circuits. We are building a PCB that measures pico amps. The customer required that it be cleaned. We would rather used the low solids and eliminate a step. The customer had
Electronics Forum | Sat Jan 23 15:19:45 EST 1999 | Earl Moon
| Could anyone send me equations to calculate controlled impedance of traces on circuit boards. I am most interested in the buried traces in multi layer boards. | | Thanks, | David - piengr@verinet.com | As one of the first MLB impedance folks on
Electronics Forum | Tue Feb 19 08:49:34 EST 2008 | rgduval
Get the ionic specs from your flux manufacturer, and show it to the designer. No-clean flux/solder is supposed to be low to minimal in ionic contamination, which allow the whole no-clean thing. If he needs further proof, you can have the board io
Electronics Forum | Sat Jun 11 07:58:17 EDT 2016 | davef
IPC-2252 - Design Guide for RF/Microwave Circuit Boards IPC-2251 - Design Guide for the Packaging of High Speed Electronic Circuits IPC-2141A - Design Guide for High-Speed Controlled Impedance Circuit Boards IPC design standards https://portal.ip
Electronics Forum | Thu Aug 31 09:10:46 EDT 2017 | hxamalia
Hi Dawson， We are using Polar SI9000 to calculate impedance . If you like ,please send your requirement to my email for calculate for free . It is Amalia from HX Circuit Technology Co.,Ltd in China, we are a prefessional PCB factory wit
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