Component Floor Life

Increasingly semiconductors have been manufactured in smaller sizes.

Component floor life.

For example if the customer uses only part of tapeand reeled product rated msl 3 and the remaining product is thus exposed to ambient temperature and humidity one must refer to the floor life table 7 1 in j std 033c to determine actual floor life on the part. If we total all the times we opened the bag it may exceeds 168 hours. What does pot life mean when using an epoxy floor coating. The customer need only be aware of msl 3 devices in regards to floor life.

Ge energy connections component shelf life storage condition requirements for electronic suppliers uncontrolled when printed ge proprietary. Good epoxy flooring will have less than an hour pot life at 70 degrees. It is based on the idea that every asset has a useful life a period of time over which it remains useful and productive. For office buildings refer to boma.

Component shelf life is really an oem specification and i would expect the oem to determine shelf life based on a couple items one a specific characteristic of the component that derogates over time. 30 c 60 rh at all other levels. Floor life the allowable time period between removal of moisture sensitive devices from a moisture barrier bag dry storage or dry bake and the solder reflow process. Internal plated contacts becoming tarnished or lubricant for moving parts drying out.

5 years floor finishes 30 other sources have more detailed life span estimates based on specific floor finish types which have life spans ranging from 5 100 years. The msl is an electronic standard for the time period in which a moisture sensitive device can be exposed to ambient room conditions 30 c 85 rh at level 1. Each time we put a new desiccant pack and new humidity indicator card in the msd bag and seal it. Moisture sensitivity level relates to the packaging and handling precautions for some semiconductors.

A long pot life or even worse an unlimited pot life is a sure sign of an inferior floor epoxy. 4 0 component floor life moisture sensitive components floor life shall follow j std 033b for floor life classification and reflow bake procedures. The moisture sensitivity level msl indicates the floor life of the component its storage conditions and handling precautions after the original container has been opened. At the end of its useful life it is expected to be obsolescent.

The permissible time from opening the moisture barrier bag until the final soldering process that a component can remain outside the moisture barrier bag is a measure of. Look at the pot life which is the time you have to work with once the epoxy is mixed.