Electronics Forum: microwave and plasma (Page 1 of 1)

COB and wire bond

Electronics Forum | Tue Jun 04 19:33:16 EDT 2002 | rob_thomas

Dave's estimation is pretty conservative but there is a lot of equipment out there and a lot of people happy to make a sale.Implementing both mentioned processes it's difficult and time consuming .Even if you get good training from whoever sells you

PDBE and PBB replacements???

Electronics Forum | Mon Mar 21 09:33:25 EST 2005 | davef

RoHS Substance||RoHS MCV Limits||Typical Testing Approaches Lead||1000 ppm* ||Wet chemical digestion followed by ICP (Inductively coupled plasma) or AAS (atomic absorption) spectroscopy ||||XRF (X-ray fluorescence) spectroscopy Cadmium||100 ppm ||Wet

soldering and bonding on gold PCB's

Electronics Forum | Mon Jan 07 13:18:28 EST 2002 | mregalia

I work for a microwave company. On our lower frequency boards (

soldering and bonding on gold PCB's

Electronics Forum | Wed Jan 09 17:03:44 EST 2002 | rob_thomas

We follow IPC-2221 recommendations for Au and don't have a problem as long as the Ni is under 150 microinches.This ensures a consistent process for us.Also we do plasma clean after SMt and prior to wirebond.That makes a big difference. Rob

soldering and bonding on gold PCB's

Electronics Forum | Wed Jan 09 17:14:48 EST 2002 | mregalia

Do you bond with Al or gold wire? What happens if the Ni is over 150 microinches? Thickness of nickel is one those things that we have not been consistent with. The industry seems to pretty much universally call for 100-200 microinches. Our old board

soldering and bonding on gold PCB's

Electronics Forum | Wed Jan 09 18:17:15 EST 2002 | Chris

I don't have a plasma cleaner either. It will help a lot. Actually I don't clean at all. Our wirebond pads are far enough away so the flux residue does not get on the wirebond pads. That's what we think anyway. I am sure we have some degree of c

Warming up solder paste at start of days production

Electronics Forum | Thu Jul 22 21:26:29 EDT 2004 | Grant

Hi, It's removed from the fridge, and the tube is loaded into the stencil printer, however it's winter here right now, so it's still quite cold. It's Australia, so when I say cold, that's relative, however the room can be about 10 dec C in the morni


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