Hi Mike - I not a promoter for making new specifications if we can use the existing ones to cover a situation. My suggestion is to use JSTD-001, paragraph 5.2 Solderability. You manufacturer transformers and inductors - you must have a process that gives the components you fabricate a good solderability (you don't intentionally set out to make bad parts and if you do then your customers will most likely inform you about it!). Even though it takes time, document the process you using including the test methodology (i.e. JSTD 002 or MIL STD 202, mthd 208) of why it works for your components and then present this to your customers when they ask the "solderability" question. Most "Customers" want assurance that the "fabricator" knows the whats and whys of his/her process and is not just making stuff blindly - your documentation is evidence that can provide that assurance. Good Luck. Dave Hillman Rockwell Collins [log in to unmask] ______________________________ Reply Separator _________________________________ Subject: Tinning and soldering transformers Author: [log in to unmask] at ccmgw1 Date: 2/3/97 10:32 PM We're pretty much one of the 'orphans' of the soldering specs. MIL-STD-2000A specifically states that it doesn't apply to inductive devices. Most of the other specs pretty much ignore transformers, inductors, and similar stuff. We have to solder internal connections that may, or may not, reflow during wave soldering. Our leads have to meet 'solderability.' Yet, our Customers (We always capitalize that word.) want us to solder to IPC requirements. How? Do we just 'cherry pick' what seems applicable? Should there be a separate section in the spec for inductive devices? Should there be a separate spec for inductive devices? How do manufacturers of other components not mentioned in the soldering specs solve this problem. We'd love to have a bit of feedback on the subject. Mike Middleton, engineer Wirebenders Inc. Custom Transformers and Inductors voice (602) 861-1856 fax (602) 870-9242 e-mail [log in to unmask] Mike Middleton, engineer Wirebenders Inc. Custom Transformers and Inductors voice (602) 861-1856 fax (602) 870-9242 e-mail [log in to unmask] *************************************************************************** * TechNet mail list is provided as a service by IPC using SmartList v3.05 * *************************************************************************** * To unsubscribe from this list at any time, send a message to: * * [log in to unmask] with <subject: unsubscribe> and no text. * *************************************************************************** * If you are having a problem with the IPC TechNet forum please contact * * Dmitriy Sklyar at 847-509-9700 ext. 311 or email at [log in to unmask] * *************************************************************************** *************************************************************************** * TechNet mail list is provided as a service by IPC using SmartList v3.05 * *************************************************************************** * To unsubscribe from this list at any time, send a message to: * * [log in to unmask] with <subject: unsubscribe> and no text. * *************************************************************************** * If you are having a problem with the IPC TechNet forum please contact * * Dmitriy Sklyar at 847-509-9700 ext. 311 or email at [log in to unmask] * ***************************************************************************