Electronics Forum: yellowish (Page 3 of 4)

Electroplating 3D Printed Plastic Parts

Electronics Forum | Tue Nov 12 16:53:16 EST 2019 | stephendo

A few lifetimes ago I worked for a company that electroless plated plastic cases for computers. I can't remember if it was us or just us and one other company. The FCC said that computers had to be shielded. So plastic computer cases had to be plated

Soldering problem with Au plating PCB

Electronics Forum | Sun Jan 25 17:40:16 EST 2009 | cuperpeter

Hello All, I have a problem with nonwetting Au finish after second cycle of reflow soldering doublesided boards. Solder nonwetted pcb pads (is wicked to component terminations) Either these pads or some of non component pads became discoloured from

Soldering problem with Au plating PCB

Electronics Forum | Tue Feb 03 16:42:50 EST 2009 | cuperpeter

Hello All, > > I have a problem with nonwetting Au > finish after second cycle of reflow soldering > doublesided boards. Solder nonwetted pcb pads (is > wicked to component terminations) Either these > pads or some of non component pads became

White Solder Mask - color not consistent

Electronics Forum | Wed Feb 26 04:28:39 EST 2014 | chongns

Hi All member I have a problem on the stable down the color of the white solder mask PCB. first, i tough the color differences was cause by the solder mask ink, but after a close look, the color change are cause by the copper under the solder mask

Lead-Free wave solder has yellow hue/tint

Electronics Forum | Sun Jun 22 13:24:49 EDT 2014 | davef

I don't know. We never had craziness like this before lead-free. You should have the yellowish-metal analyzed to be sure. Guessing: You're seeing this color on the terminations of components, not on the bulk of the SnX solder connection. If that's

Solder Joint Discolouration

Electronics Forum | Thu Jan 10 02:16:09 EST 2019 | ameenullakhan

Hi Steve, Thanks. This from the trusted supplier. HASL finished PCB. Even PCB supplier is using the water wash flux for fabrication. Its almost eliminated with N2 environment. And we had got a expert view from Dr. Lee of Indium on the issue st

Solder Paste

Electronics Forum | Mon Jul 30 02:01:15 EDT 2001 | mugen

Hey....sneaky smartie here.... my finance manager, would love to have you on the MRB team.... Anyway, most technical paste specs, do highlight the possibility, should the paste become "dry" or "sticky", we MAY recondition the paste, by "place it fro

Intermetalic Growth with Gold Finishes

Electronics Forum | Wed Aug 22 22:22:52 EDT 2001 | davef

First an administrative point, you can edit the postings that you make on SMTnet. Look for the yellowish-greenish EDIT button at the top of your posting. Second there are over 170 postings on intermetallic* on the fine SMTnet Production Forum Archi

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

Yellowish

Electronics Forum | Tue Oct 03 17:04:07 EDT 2006 | cuculi54986@yahoo.com

Glenn, What alloy are you using for Pb-free HASL? You say tin copper nickel, but is it SN100C? Against manufacturing engineering's recommendation, my company specified simply "Pb-free HASL" as the finish for our Pb-free PCBs. One of our suppliers

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