Electronics Forum | Tue Nov 06 10:28:58 EST 2018 | davef
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Electronics Forum | Wed Jan 04 03:03:13 EST 2023 | msirifat
Hello Magyar, the main reason is supply chain disruption due to covid in china. The regular lot transformers failed in IQC, so we ordered a new lot but it's delayed due to covid. Meanwhile, some other components (bare PCB, capacitor) will be out of s
Electronics Forum | Wed Jan 04 03:04:31 EST 2023 | msirifat
Hello Magyar, the main reason is supply chain disruption due to covid in china. The regular lot transformers failed in IQC, so we ordered a new lot but it's delayed due to covid. Meanwhile, some other components (bare PCB, capacitor) will be out of s
Electronics Forum | Mon Feb 09 09:00:17 EST 2015 | jax
Outside the MSD issues stated already (and I cannot provide a exact time not knowing multiple factors like Humidity levels, temps, exposure times, etc...) OSP might be the very worst finish to use in this scenario of side 1 / store on a shelf / side
Electronics Forum | Thu Feb 27 02:55:53 EST 2020 | hexton
I want to avoid peoples preferences as they will differ and will not be a deciding factor. A heat gun will introduce risk to surrounding PTH components and having to add protection for those, will limit any gain in productivity. There is no question
Electronics Forum | Fri Jan 11 11:14:14 EST 2002 | leedianeh
I am going to be using large numbers of silver immersion PCB's for assembly. I am concerned about long term storage ( shelf life )and handling prior to placement/assembly. The recommended 'shelf life' appears to be 6 months but obviously this will
Electronics Forum | Thu Nov 28 20:37:40 EST 2002 | Dreamsniper
I'm in the process of generating work instructions for our stores and production process with regards to moisture sensitive devices.And I'm a bit confused. I found out that we have many TSOP's, QFP's and BGA parts in sealed bags that have not been op
Electronics Forum | Sun Aug 03 08:27:41 EDT 2008 | davef
IPC-4553, Specification for Immersion Silver Plating for Printed Circuit Boards, 1.4.1 Solderability. This primary function of IAg is to provide a solderable surface finish, suitable for all surface mount and through-hole assembly applications and wi
Electronics Forum | Mon Feb 05 07:02:11 EST 2007 | CL
ASIR, Findings for us so far: OSP- has worked well for us for single sided boards only. We have seen problems with using it on double sided reflow applications. Also, some customers have specified OSP, but are intolerant of exposed copper. Limited
Electronics Forum | Tue Feb 22 17:57:32 EST 2005 | Austinj
Most solder paste has a shelf life of 1 week at room temperature after opened, if resealed at the end of the shift/day. Most shelf lives are 4-6 months at 40F (refridgerated) or 1 month at room temp (unopened/sealed). Recommended stencil life is appr
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