422 flex & circuits & assembly & process results

Electronics Forum: flex & circuits & assembly & process (Page 10 of 43)

Re: No clean and f devices

Electronics Forum | Thu Nov 11 18:28:10 EST 1999 | John Thorup

Hi Jeff Actually it's not necessarily Signal to Noise Ratio or even RF circuitry. All no cleans leave behind residue by description. This residue can affect RF or other high frequency circuits in a number of different ways including SNR. Very high

PCB Depaneling Router

Electronics Forum | Tue Feb 26 21:23:21 EST 2008 | davef

Several methods are available for singulating or extricating individual flexible circuits from a processed panel; this discussion of the topic applies to all types of flexible circuits. In general, the methods for singulating flex circuits can be bra

How to install FBGA ICs on both sides of Flex boards with no stiffeners ?

Electronics Forum | Thu Aug 09 09:14:22 EDT 2018 | ks0707

Is there any special machines/equipment which are able to install FBGA parts on the very thin flex boards for Printing, Pick & Place, and Reflow ? Q2> Is there any Fixture house who can offer fixtures to enable SMT processes for those assemblies ? Q

What is the rootcause for BGA Lifted PAD after reflow

Electronics Forum | Wed May 21 04:50:51 EDT 2008 | aj

Hi all, We had similar problems a while back. Boards would fail at test but if you applied pressure to the BGA they would pass. Turned out that during the PTH assembly process the Operators were flexing the cards during the insertion of an Oupin C

Reference Standard for Plasma Etching or Scrubbing on Flex Ckts

Electronics Forum | Fri May 14 11:17:42 EDT 2004 | Ashok Dhawan

I am having coating adhesion problem with flex circuits. The cover plate material is KAPTON or Poly imide. The conformal coating material used is humiseal 2A64. The boards are cleaned, measuring less than 4 microgram Nacl per sq in. against acceptabl

Water Residue Stains - how to remove?

Electronics Forum | Wed Dec 19 01:17:13 EST 2001 | ianchan

Hi Experts, I need help here, advice appreciated from all... Production is running a Lot of flex-circuit PCB, through the SMT line, with 0402 components. The flex-PCB is taped to FR4 support "pallets" when processing thru' the SMT P&P m/c. We use

Which kind of supplier should I choose for pcb fabrication?

Electronics Forum | Mon Oct 29 05:14:18 EDT 2018 | vipcircuit

This is Joe from Shenzhen Vip Circuit Co,. Ltd.-- a leading PCB and PCBA manufacturer in China. Why choose Vipcircuit ? 1. PCB fabrication with 100% ET and AOI testing,certified by ISO, UL; 2. Special material like Rogers,Arlon,Taconic,Aluminum base;

PCB Manufacturing Australia

Electronics Forum | Mon Oct 29 11:44:46 EDT 2018 | vipcircuit

Dear Andrew: Nice day! This is Joe from Shenzhen Vip Circuit Co,. Ltd.-- a leading PCB and PCBA manufacturer in China. Why choose Vipcircuit ? 1. PCB fabrication with 100% ET and AOI testing,certified by ISO, UL; 2. Special material like Rogers,Arlon

Good book

Electronics Forum | Wed Jul 11 20:17:05 EDT 2001 | davef

I�ve written a review to be published in an up-coming SMTnet Newsletter of �Printed Circuit Assembly Design� Leonard Marks, James A. Caterina [Hardcover - 368 pages (July 26, 2000) McGraw Hill Text; ISBN: 0070411077]. In short, � In �Printed Circui

Re: SMT Process Control

Electronics Forum | Tue Jan 12 08:24:00 EST 1999 | Dave F

| We are struggling with an effective way to control our SMT processes. I'm curious as to what parameters other companies monitor in their processes and how to control the quality coming off the end of the SMT line. We are currently restricted to a