Electronics Forum | Wed May 27 11:19:34 EDT 1998 | Earl Moon
| | | | | | I'm reviewing my board fab spec. It calls for a minimum SnPb thickness of 50 microinches on HASL PWB's. I've looked at other specs that call out anything from 30 to 80 microinches, and others that just say the copper pad must be covered
Electronics Forum | Wed Sep 03 16:59:13 EDT 2008 | glennster
At a former employer we required HASL thicknes to be a minimum of 0.75 micron (30 microinches), as measured at the thinnest point on any given pad. This would generally assure a minimum 1 year solderability shelf life. Usually when we saw a soldera
Electronics Forum | Tue May 26 14:50:07 EDT 1998 | Dave F
| | I'm reviewing my board fab spec. It calls for a minimum SnPb thickness of 50 microinches on HASL PWB's. I've looked at other specs that call out anything from 30 to 80 microinches, and others that just say the copper pad must be covered and sol
Electronics Forum | Thu May 28 07:25:58 EDT 1998 | Earl Moon
| Hey yooze guys! | Enough of the jokes between you and Earl (GRIN), let's get back to the topic...well, okay... you can tell a few more...(but good ones, 'kay?) | Anyhoo...I'm not sure if ya'll are on the IPC Technet list or not, I've not seen any p
Electronics Forum | Thu May 28 05:43:33 EDT 1998 | Earl Moon
| Hey yooze guys! | Enough of the jokes between you and Earl (GRIN), let's get back to the topic...well, okay... you can tell a few more...(but good ones, 'kay?) | Anyhoo...I'm not sure if ya'll are on the IPC Technet list or not, I've not seen any p
Electronics Forum | Tue May 26 15:27:36 EDT 1998 | Dave F
| | | I'm reviewing my board fab spec. It calls for a minimum SnPb thickness of 50 microinches on HASL PWB's. I've looked at other specs that call out anything from 30 to 80 microinches, and others that just say the copper pad must be covered and s
Electronics Forum | Wed May 27 21:05:30 EDT 1998 | Steve Gregory
Hey yooze guys! Enough of the jokes between you and Earl (GRIN), let's get back to the topic...well, okay... you can tell a few more...(but good ones, 'kay?) Anyhoo...I'm not sure if ya'll are on the IPC Technet list or not, I've not seen any posts f
Electronics Forum | Thu Sep 19 21:31:37 EDT 2019 | deanm
Briefly opening the door probably won’t affect anything significantly. If in doubt, add an extra hour to the bake time. A better approach might be to keep both parts in the oven for 25 hours. You have up to 96 hours before oxidation becomes an issue.
Electronics Forum | Mon Aug 30 14:46:56 EDT 2010 | davef
Sure, you should be able to measure the copper oxide thickness on the inner layers of a PCB when doing sections.
Electronics Forum | Mon Aug 30 10:39:08 EDT 2010 | jamesc09
Is there any way to measure the copper oxide thickness on the inner layers of a PCB? I have been asked to investigate this and am not sure if it is possible. If it is, please tell me by what method, any contract labs that can do it, or the name of
