why you need to know? plated can control the thickness. hot dip can not...
(you can get any thickness you want, depend upon where you measure...)
jk
-----Original Message-----
From: TechNet [mailto:[log in to unmask]]On Behalf Of Ingemar Hernefjord
(KC/EMW)
Sent: Thursday, January 27, 2005 8:13 AM
To: [log in to unmask]
Subject: Re: [TN] Solder tags and tin thickness
Matthew, my wife and I LOVE english breakfast! We spent a couple of weeks in
Cumbria, the countryside, and were impressed by the richness on the tables.
We could easily be active the rest of the day after such meals. Of course, I
understand all brits can't have that habit, people don't consume calories
like in old days...
Any idea about tin thickness?
Ingemar
-----Original Message-----
From: TechNet [mailto:[log in to unmask]]
Sent: den 27 januari 2005 13:47
To: [log in to unmask]
Subject: Re: [TN] Solder tags and tin thickness
If you think that we eat that lot for breakfast in the UK your completely
wrong.
These days it's Cornflake & bran for all.
-----Original Message-----
From: TechNet [mailto:[log in to unmask]]On Behalf Of Ingemar Hernefjord
(KC/EMW)
Sent: Thursday, January 27, 2005 11:46 AM
To: [log in to unmask]
Subject: [TN] Solder tags and tin thickness
Morning all, what about a simple q while melting first meal of the day?
(US:donuts and coffee ; UK:scrambled eggs, black pudding, sausage,
marmelade, plums,juice, milk, scones, bacon, coffee, cheese, tomatoes, etc)
Solder tags, pin, eyelets for printed boards, pressfit. We have found large
variations in tin thickness from various manufacturers. Checked about 20
known makers, and none specified exactly what plating they had. Just 'tinned
brass' or 'special high quality tin process' or 'solderable plating' etc.
Too thin tin will make the pins less solderable after some months, while
exaggerated thickness will cost some extra and cause tolerance problems. So,
gentlemen, what do you prefer for a Veroboard pin or a backplane ditto?
I've proposed minimum 10 microns over nickel if the pins are brass. Or
minimum 25 microns of tin without nickel barrier. Does this sound
reasonable?
Ingemar Hernefjord
Ericsson Microwave Systems
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