Electronics Forum: ionograph no heat? (Page 2 of 3)

QFN PCB Pad no Drain Hole

Electronics Forum | Wed May 22 19:10:47 EDT 2013 | anvil1021

We do a lot of these devices and I guess I am not familiar the term "Dry Solder". The QFN device is not designed to have a drain hole, but needs to have thermal vias to control heat in most cases. We have used every possible gnd pad design and modifi

Re: water soluable or no clean flux?

Electronics Forum | Mon Sep 20 12:19:13 EDT 1999 | Brian

| Hi all, | | We have a little discussion here about the suitable flux for a certain process, as all of us are beginners we need your advice. | | We are producing VGA cards and mother boards for PC's all components to be wave soldered are TH, the S

Re: water soluable or no clean flux?

Electronics Forum | Mon Sep 20 14:46:03 EDT 1999 | Dave F

| Hi all, | | We have a little discussion here about the suitable flux for a certain process, as all of us are beginners we need your advice. | | We are producing VGA cards and mother boards for PC's all components to be wave soldered are TH, the S

Re: water soluable or no clean flux?

Electronics Forum | Mon Sep 20 17:20:08 EDT 1999 | Earl Moon

| | Hi all, | | | | We have a little discussion here about the suitable flux for a certain process, as all of us are beginners we need your advice. | | | | We are producing VGA cards and mother boards for PC's all components to be wave soldered are

Re: water soluable or no clean flux?

Electronics Forum | Mon Sep 20 17:36:46 EDT 1999 | Dave F

| | | Hi all, | | | | | | We have a little discussion here about the suitable flux for a certain process, as all of us are beginners we need your advice. | | | | | | We are producing VGA cards and mother boards for PC's all components to be wave so

Re: water soluable or no clean flux?

Electronics Forum | Tue Sep 21 07:47:31 EDT 1999 | Wolfgang Busko

| | Hi all, | | | | We have a little discussion here about the suitable flux for a certain process, as all of us are beginners we need your advice. | | | | We are producing VGA cards and mother boards for PC's all components to be wave soldered are

Effects of Silicone on Ionic Contamination Testing

Electronics Forum | Thu Oct 17 17:29:46 EDT 2013 | lordofpiggies

Hello. We are building a CCA which has a silicone-based adhesive whose purpose is to bond the bottoms of multiple LED displays to heat sinks. Our customer wants the CCA to be tested for ionic residues per J-STD-001, but we are hesitant to test the

Re: CSP Assembly- No-clean vs Aqueous

Electronics Forum | Tue Dec 29 22:31:06 EST 1998 | Kelvin Chow

It is still a big concern on using No-clean or aqueous cleaning for CSP assembly. I prefer to use no-clean, however, not all components are suitable to use it. Especially those dirty capacitors or connectors which may cause solderability problem. It

Re: CSP Assembly- No-clean vs Aqueous

Electronics Forum | Wed Dec 30 17:34:23 EST 1998 | Michael Allen

I'm afraid we don't agree regarding the best test method to use here. My understanding is as follows. The omegameter test measures board-level, ionic contamination (i.e., average for the entire board area and all components); it does not tell you w

Re: CSP Assembly- SIR Test

Electronics Forum | Thu Dec 31 01:09:18 EST 1998 | Kelvin Chow

Dear Micheal, SIR test is used to characterize fluxes by determining the degration of electrical insulation resistance of rigid printed wiring board specimens after exposure to the specified flux. (IPC TM-650 #2.6.3.3 http://www.ipc.org/html/tm2.6.h


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