Electronics Forum: solder mask color vs adhesion (Page 1 of 2)

Coating adhesion problems

Electronics Forum | Tue Sep 21 11:34:10 EDT 2004 | davef

Several things to check are: * Ask Multicore if their flux res and your conformal coat are compatible. Conformal coats and NC flux res are notorious for having compatibily issues. * Conformal coat a bare board to determine if there is there is enoug

Micro BGA pads, adhesion to laminate

Electronics Forum | Thu Jul 10 09:55:47 EDT 2003 | davef

A reading of the pictures is: A1: Looks like pad [B1] is smaller than the other pads. It�s weird that the pads are such different colors. A2: Looks like pad [B1] is smaller than the other pads. Solder mask opening [B1] is misregistered and seems s

ENIG vs Flash Gold

Electronics Forum | Fri Mar 24 18:07:25 EST 2006 | Chris

Flash gold is just thin gold plating over electroless nickel or electrolytic nickel. Flash gold is electrolytic gold where the panel is connected to a plating rectifier and current causes the plating process to occur. Gold thickness is controlled b


Electronics Forum | Mon May 14 17:12:20 EDT 2001 | davef

Continuing along the path that Brian took ... IPC-7525 gives design guideline for stepped stencils. It goes something like: * Stepped area SB GT 25 thou from pads located on the greatest thickness of the stencil * Pads in stepped area SB GT 35 tho

Re: Green vs Blue Soldermask

Electronics Forum | Thu Sep 03 10:04:14 EDT 1998 | Earl Moon

| Can any one tell me if there is a large difference between green soldermask and blue soldermask, in reference to sending the board through the IR reflow oven. | - two PCB's (smc parts) are manufactured, the first has green soldermask, the second bl

Dymax vs Humiseal Urethane Confomals.... Anyone?

Electronics Forum | Tue Feb 03 13:39:08 EST 2009 | grics

Good morning Jamie. I work at a CM and can offer some input on process flexability. I do not have any data on how reliable the coating is but I can say that they are both very difficult to control. Will you be selective coating or full coating? Ho

How to choose a new solder paste

Electronics Forum | Thu May 26 08:52:42 EDT 2011 | davef

Phil Zarrow wrote a useful paper that could help in evaluating paste. Here read it ... Evaluating Solder Paste � Not An Option Contributed by Phil Zarrow of ITM an Independent SMT consulting firm With soldering being the dominant source of assembly

Does anyone have an ESE LX Printer? Looking for feedback

Electronics Forum | Mon Apr 23 11:05:36 EDT 2018 | proceng1

Does anyone have an ESE LX3 printer installed and running at their facility? I'm curious if you've had any problems, or major break-downs. I'm wondering in your experience how it handles different color solder mask. Any issues you found with the squ

Re: Solder Resist Solder balls

Electronics Forum | Tue Dec 22 12:32:16 EST 1998 | Earl Moon

| Folk's, | I'm in need of some help / direction. I'm working on my thesis for a masters based on looking at the effect's of the solder resist promoting / reducing the amount of solder ball's during wave. I'm looking at thing's like colour, texture,

Stencil Printing: Single pass vs. Double pass

Electronics Forum | Wed Dec 19 18:41:33 EST 2007 | darby

You printer is not solely designed for printing solder paste. This is why some of the options you would never use for paste appear in the menu. You may actually be printing overlays or yes, even t-shirts. This is why you may want to flood/print, prin

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