Moisture Sensitive Devices

Here are the answers to your questions :

The shelf life in sealed bag as indicated by the seal date is calculated to be a minimum of 12 months, when stored in a non-condensing atmospheric environment of <40C/90%RH. The IPC/JEDEC standard J-STD-033A does not require that the components be baked when the one year shelf life is exceeded. The decision to bake parts should be made strictly based on the status of the Humidity Indicator Card (HIC) when the bag is opened. Ref : section 5.5.1 : "Excess humidity in the dry pack is noted by the HIC...regardless of the storage time, i.e., whether or not the shelf life has been exceeded."

When the bag is opened, provided the HIC is within the specified limit, then the floor life will be as indicated on the MSD label. Please note that the actual floor life will be modified by environmental conditions other than 30C/60%RH. Ref. section 5.2 and table 5-1.

As far as baking at 40C and 60C, the answer is that you are on your own when you deviate from the standard baking conditions specified in table 4-1. If you bake at 40C, the RH must be less than 5% and the duration will vary based on the MS Level, body thickness and saturation level. There is no specific duration at 60C although it should be somewhere between the 40C and 90C bake table. You can buy a cheap hygrometer to put in your oven to verify the actual humidity level.

I hope this is helpful,

Francois Monette Cogiscan Inc.

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Thanks monette. Its been very helpful.

best regards,

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