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Printed Circuit Board Assembly & PCB Design Forum

SMT electronics assembly manufacturing forum.


PCB & MSD Component baking oven

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#63205

PCB & MSD Component baking oven | 30 November, 2010

We want to handle the materials such as PCB & MSD components as per IPC 1601 & J-STD-033. As such, we need a baking oven to perform this and to monitor (temperature – we have to maintain up to 200’C & humidity – below 5%)the control environment & maintain with data logger. We face more and more issues on this subject. I hope, you will be able to provide with us support.
also I want to know this below 5% Humidity needs to maintain in the oven?

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#63231

PCB & MSD Component baking oven | 3 December, 2010

A baking oven over 100 C will be at zero humidity. Do you really need to store pcbs/devices at 200 C...this will surely harm some products ?
IPC 33B01 allows storage of MSDs in a dry cabinet at less then 5%.....these can operate at room temp or 40 / 60 C. A company called TOTECH has lots of info about dry cabinets and storing devices in line with the IPC spec. You should speak to them.

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#63233

PCB & MSD Component baking oven | 3 December, 2010

Dear Graham,

Thanks for the information. is there any way to control the humidity inside the oven..?
At over 100 C. how the evaporated vapour from the component remove out from the oven..?

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#63245

PCB & MSD Component baking oven | 7 December, 2010

In an oven over 100 C any moisture will escape through vents.
There will not be huge volumes of moisture in the oven when you are baking components so it should easily escape through vents / holes in the system leaving you with a humidity of near zero %.
At below 100 C, there will be some humidity in the oven, but I do not know how you can control it to a set level.
Totech dry cabinets will control the humidity down as low as 0.5% RH at room temperature.

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