Electronics Forum | Tue Dec 18 15:05:58 EST 2001 | blnorman
What is the maximum allowable thermal ramp rate for wave solder. We have a "short" machine used for selective soldering. To get the boards up to temp, we need to exceed our normal 2�C/sec. Are there any IPC documents governing this process? Anyon
Electronics Forum | Tue Dec 18 16:49:17 EST 2001 | davef
J-STD-001 - Requirements For Soldered Electrical & Electronis Assemblies is the governing document. It defines no specific limits like you mention. It states words to the effect that preheating should not do bad things.
Electronics Forum | Mon Dec 27 18:44:14 EST 2004 | Mark
I am testing some BGA's (PBGA 30mm x 30mm) to evaluate the maximum ramp rate we can achieve in our reflow oven. Temperature is being measured at the body(top) of the component / not leads. After several trials (with various oven settings), the high
Electronics Forum | Fri Feb 02 05:11:29 EST 2018 | deanm
I developed our company's procedure for moisture sensitive devices based on J-STD-033 and I don't recall anything requiring a certain ramp rate. Furthermore baking at 85C will greatly extend the time to reset the clock and it is harder to maintain
Electronics Forum | Tue Jan 30 01:06:51 EST 2018 | dgassier81
Hi, In our shop we've always baked out PCBs and moisture sensitive parts prior to electronic assembly using a gentle ramp rate of 2 degC/minutes going hot (93degC) and same ramp rate going cold (back to room temp). We're trying to outsource that pro
Electronics Forum | Mon May 21 11:09:30 EDT 2018 | optimatech
Thank You for informing me :)
Electronics Forum | Tue Jan 30 14:24:55 EST 2018 | emeto
I used to bake parts before. After I discovered the drying cabinets, that is not a concern anymore. I strongly recommend you to get one of these and try it. It dries them out pretty quick and keeps very low humidity all the time. No heat applied.
Electronics Forum | Thu Feb 01 15:39:52 EST 2018 | dgassier81
I'm guessing you're right that would be one way of doing it. Thanks for your feedback. Best, David
Electronics Forum | Fri Feb 09 09:42:33 EST 2018 | jmedernach
I completely agree. J-STD-033 spells out the "how to" of baking, quite clearly. You have to bake something for an expensively long time at 80 - 85C in order to properly desiccate your components.
Electronics Forum | Wed Feb 14 05:03:27 EST 2018 | optimatech
The process of electronic manufacturing services consists of the manufacturing of a lot of complex parts and might consist of a range of services. To get high-quality EMS services, contact Optimatech! https://www.optimatech.net/electronic-manufactur
