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Problem with Reed switch hermeticity

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#59260

Problem with Reed switch hermeticity | 12 July, 2009

I have a problem we change a product from leaded to lead free, I was not involve in the selection of the new reed switch, but now we are having problems with the hermeticity in the switch,this occurs after is overmould and put to a 6 cycles in the thermocycle. Some engineers are saying that the problem starts at the reflow oven, Iam using a 3 zone reflow oven with these temps. 128 210 260 at .55m/min first thing can the reflow at those temp cause the glass to thermal shock the seal in the switch or do some damage to the seal?

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#59281

Problem with Reed switch hermeticity | 13 July, 2009

So, what happens when you: * Run the switches through the reflow oven as piece parts, not assembled on the board? * Pot the switches as piece parts, not assembled on the board?

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#59282

Problem with Reed switch hermeticity | 13 July, 2009

I have put them thru the reflow just the switches and theres no problem even then I put them back on tape and reel and again to the reflow and test them again and they all pass

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#59283

Problem with Reed switch hermeticity | 13 July, 2009

Way to go, Armando!!! Those punk engineers always blaming reflow for every failing!!! Wuda they know?

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