Dry packing that meets moisture sensitivity level procedure, with the evidence to prove it.
The problem
Moisture-sensitive devices absorb water through their plastic packaging while they sit in stores. At reflow that water flashes to steam and cracks the package from the inside. The component looks fine and fails in the field.
Dry packing: a moisture barrier bag, a desiccant charge sized to the bag area, and a humidity indicator card that shows whether the pack held. The card is what turns the procedure into evidence.
The method
A repeatable sequence, in the order that matters. Skipping the first step is the usual reason the rest disappoints.
The MSL rating of the device sets the floor life and the humidity that must be maintained.
Charge is calculated from barrier bag surface area and intended storage period, not from carton volume.
Choose a card whose spots bracket the threshold in your procedure — commonly 5–15% or 10–60%.
Seal the bag, record the date, and treat the floor-life clock as starting at opening.
Components past floor life are baked before reflow rather than risked.
What you will need
Tyvek-sealed desiccant packs
Type A silica gel beads sealed one-side into DuPont Tyvek, supplied with the documentation regulated customers ask for.
DMF-free and cobalt-free with MSDS, SGS and RoHS documentation
Reversible humidity indicator
Blue-to-pink indicator cards in single, three, four and six spot versions covering RH ranges from 5% to 60%.
Reads the actual humidity inside the pack, at a glance
Sealed-enclosure desiccant
Bagged desiccant for sealed enclosures where the target is a dew point, not just a humidity percentage.
Drives sealed enclosures toward a −100 °F dew point
Foil sealing & shielding tape
Aluminium foil tape for thermal duty and EMI/RFI shielding.
Seals barrier packaging and shields against EMI/RFI
Sheet-form desiccant
Lightweight moisture-control sheets for flat, thin or space-constrained packaging.
Flat sheets fit where sachets will not
Spherical non-indicating beads
Transparent white spherical beads in 1–2 mm and 2–4 mm, which go slightly milky as they load and regenerate cleanly.
Free-flowing spheres that resist dusting and attrition
Who this applies to
Talk to our experts
Send us the product, the enclosure, the route and the storage period. You will get a desiccant type, a dose and a format back — not just a price list.