Electronics Forum: flexible board (Page 2 of 24)

Permanent Marking Ink for ID# on PCB while circuit board is being built on Flowline

Electronics Forum | Mon Jul 03 14:47:35 EDT 2000 | Ashok Dhawan

In a typical flowline assembly of circuit boards, what are the different methods used for tracking WIP ? I can think of : 1. travel cards - not suitable for panelised boards 2. Marking ID# on board at various operations while board is being built.

Flex Circuits - Bend proximity spec

Electronics Forum | Wed Aug 04 17:42:11 EDT 2010 | davef

IPC-2223, Sectional Design Standard for Flexible Printed Boards

Flexible Circuit Board Finish ENIG or Hard Gold?

Electronics Forum | Thu Aug 25 17:29:14 EDT 2016 | shawn_halo_1

Right, but these contacts have up to 36V running through it 20 minutes at a time unlike your wedding ring when you are swimming. If you take a look at the picture I posted in the last comment, that is what we are seeing over the course of use.

Flexible Circuit Board Finish ENIG or Hard Gold?

Electronics Forum | Thu Aug 25 18:14:10 EDT 2016 | davef

Shawn ... I believe you. I believe what you're saying. I don't believe that you received the metals that you ordered. From the way it looks I'd guess that you have no nickel and that you're seeing copper corrosion.

Flexible Circuit Board Finish ENIG or Hard Gold?

Electronics Forum | Wed Aug 24 22:02:44 EDT 2016 | davef

Sorry. I'm not connecting. What are you talking about: * Bare ENIG pads * ENIG pads that have SMT and other components solder connected to the pads So, you've got this ENIG board in an enclosure that takes-on water ... What is getting corroded? Talk

Flex PCB through production

Electronics Forum | Fri Nov 15 22:05:09 EST 2019 | alanyang

Flexible circuits assembly is different from rigid board assembly. For some manfacturers, fpc assembly are some things more painful because the assembly quality is unstable. Recommend to check and hope these 2 blogs are helpful. Flexible Circuit Asse

Samsung Placement Machines

Electronics Forum | Tue Aug 05 10:01:42 EDT 2003 | Sat

You are welcome and thank you for all the inputs. You are right in that these new machines have the camera vision. Like I said in my other post, my engg's like all the machines but prefer Universal and Mydata for a bit more available flexibility like

Conformal Coating Flexible PCBs

Electronics Forum | Mon Jan 13 11:14:41 EST 2020 | amitshir9

Conformal coating is a protective polymer film or chemical coating that seals off the vulnerable circuits. I've used the conformal coating flexible PCB from Capel Technology Co.Ltd and there are many types of circuit board produced used by conformal

Flex Circuit Fids

Electronics Forum | Mon Mar 10 20:14:20 EDT 2008 | davef

We'd be unhappy with features that are not in copper that is at the same level as the component pads, because of difficulties the fabricator would have in maintaining registration between the copper pads and the ink used for the features not in coppe

Double sided design

Electronics Forum | Thu Aug 25 10:32:03 EDT 2005 | davef

IPC-2221A, Generic Standard on Printed Board Design, the base document that covers all generic requirements for printed board design, regardless of materials. From there, the designer can choose the appropriate sectional standard for a specific techn


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