That is not how I interpret 5.4. I discussed this with one of our Master
Instructors, we interpret 5.4 as a requirement ensuring that your handling
and storage methods have not degraded solderability. It does not suggest how
you should do this nor is there a requirement for objective evidence.
Perhaps you could store coupons with comparable finishes and record test
results, there may be even simpler ways. If material in your process is
known to pass J-STD-002 and is less than 6 months old and you can show good
solderability on sample material that is one year old. I suggest you have
complied with 5.4. Just remember your process control system must be
available for review and is subject to approval by your customer.
Guy Ramsey
Senior Lab Technician / Instructor
E-Mail: [log in to unmask] <mailto:[log in to unmask]>
Ph: (610) 362-1200 x107
Fax: (610) 362-1290
-----Original Message-----
From: TechNet [mailto:[log in to unmask]]On Behalf Of David Fish
Sent: Thursday, July 05, 2001 10:51 PM
To: [log in to unmask]
Subject: Re: [TN] J-STD-002 and -003 solderability testing...
Guy,
We agree that if all we had was J-STD-001C, 5.2 Solderability, we probably
would not be having this conversation.
. but we do have J-STD-001C, 5.4 Solderability Maintenance. We also agree
that 5.4 applies to components, parts, etc. that come from the stockroom,
kitting, component prep, sequencing, machine insertion, machine placement,
hand insertion, or similar areas up-stream of all soldering processes.
5.4 says that if you don't solder the components, parts, etc. that you
checked for solderability in 5.2 right away, but instead put them in a
stockroom, kitted them, prepared them, sequenced them, machine inserted
them, machine placed them, hand inserted them, or similar things; then you
need to check the solderability of every component, part, etc. that you did
those things to prior to starting a soldering operation on that component,
part, etc.
Dave Fish
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