Electronics Forum: 3um (Page 1 of 2)

BGA Straight crack

Electronics Forum | Tue Feb 26 07:54:27 EST 2002 | vincent_f

3um 0.03um

ImSn thickness

Electronics Forum | Fri Feb 16 08:28:50 EST 2007 | pavel_murtishev

Good afternoon, Typical plating thickness for immersion tin is 0.6-1.0um. I do not know what the maximal thickness is. But plating is self-limiting process and I believe maximal thickness should be about 2-3um. BR, Pavel

looking for HASL TIN thickness specification

Electronics Forum | Wed Sep 03 07:43:13 EDT 2008 | davef

What do you mean by a "few micron thick"? IMC thickness pre-cycling (NEMI Lead-free) * Cu3Sn: 3um [118 uin] * Cu6Sn5: 1um [40 uin]

What defect in SMT will be cuased by dust contamination?

Electronics Forum | Mon Mar 15 01:38:46 EDT 2021 | researchmfg

Thanks for the answer. Did you really find the dust block the nozzle and sensor? By the way, If SMT environment need to control the dust then what size of dust need to be controlled? 0.3um, 0.5um or 10um?

Au Plating

Electronics Forum | Tue Jun 04 17:10:13 EDT 2002 | davef

First, �flash gold� is very loose language. It means different things to different people. �Flash� gold is a thin coat of immersion gold. Imm gold self-limits at ~0.3um[12uin]. And fabs put-down �flash� prior to electroplating thicker gold for wi

PCB pad contamination

Electronics Forum | Tue Aug 21 05:05:52 EDT 2007 | vangogh

Hi All, I would like to get some inputs regarding this.... I have bare PCB which were stored with kapton tape attached on the Au plated pads. These were stored for close to a year. Upon removal of kapton tape, we noticed discolorations on the edges o

Solder Joint Strength

Electronics Forum | Tue May 26 07:42:54 EDT 1998 | Chris Sargent

Regardless of what various inspection standards state, has anyone got any information on how the strength of a soldered joint changes with the amount of solder in contact with the legs. ie if there is 0.152um depth of contact how does the joint stre

Foam Fluxer

Electronics Forum | Tue Aug 17 11:31:39 EDT 2004 | Cal

Hello All- I need to replace my Foam flux aerator in my wave soldering machine and need a source. The "Stone" Size is 38x25mm @ 3um. If any one has a source thanks in advance. OBTW- this wave not a "Name Brand" machine (i.e. Eltrovert). Cal

What defect in SMT will be cuased by dust contamination?

Electronics Forum | Thu Oct 21 13:08:38 EDT 2021 | ademrah

Hi, It depends on smallest pitch size of your components. For the 0.3 um, 0.5 um, etc. sizes could be mentioned on Clean Room. For example; for ISO-7 standart (Class 10,000) higher than 5um is not acceptable, however 1mm can acceptable to describ

soft gold vs immersion gold

Electronics Forum | Mon Aug 16 13:18:46 EDT 2004 | davef

You bet our reponse changes. Q2R: Hard gold thickness is 4 to 10 u" for Au and 300 to 400 u" for nickel A2R: This is a hard gold spec?? It looks like a ENIG spec. Although, the Ni is quite heavy, 150 uin is sufficient for most applications. The gol

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