J-STD-020C Moisture/Reflow Sensitivity Classification for
Non-Hermetic Solid State Surface Mount Devices
is an association for solid state technology. Many standards
are maintained by the JEDEC Association and the J-STD-020C
is the standard for Moisture/Reflow for Components.
purpose of the J-STD-020C standard is to identify the classification
level of non-hermetic solid state surface mount devices
(SMDs) that are sensitive to moisture-induced stress so
that they can be properly packaged, stored, and handled
to avoid damage during assembly solder reflow attachment
and/or repair operations. This standard may be used to determine
what classification/preconditioning level should be used
for SMD package qualification. Passing the criteria in this
test method is not sufficient by itself to provide assurance
of long-term reliability.
components are compliant with the Jedec J-STD-020C Standard.
Solid State electronic components are simiconductors such
as our Xmultiple product line of XTFZ transformers and magnetics.
Other solid state components include transistors, microprocessors
chips and the memory. Solid stae components have no nmoving
parts and no dependency on electrical properties of a vacuum.
Solid state components do have electromagnetic and quantum-mechanical
action which takes place within the components..
J-STD-020C Does Not Apply to Connectors --- However There
Are Mositure Considerations For SMD Connectors Which Should
XRJS and XMS series are a SMD (surface mount technology)
typed RJ45 connector, which is built with SMD shaped pin-out
for the customer to use in the IR reflow process. However,
the JEDEC J-STD-020C standard applies to the solid state
component category and not connectors.. The Solid State
Component include silicon based components such as IC, DRAM,
processor chips and flash memory. They do not have any moving
parts.. Nevertheless, there is one issue related to the
plastic housing being used in the XRJS and XMS series connectors
which have moisture/reflow considerations. The plastic in
these connectors is Nylon. The Nylon can absorb moisture
in the storage stage and sometime the housing will be bumped
up after the IR reflow process. Internal moisture is heated
up by the IR process and therefore can bubble on the plastic.
recommends for the XRJS and XMS series moisture considerations
should be controlled by the customer.
of surface mount connectors should keep the connector
in a well conditioned environment. First-in-first-out
is also an important guide line for XRJS and XMS SMD typed
connector must be used within a period of time. As for
the ¡§solid state¡¨ category products the proper storage
conditions must be maintained to eliminate moisture. Connectors
should be keep in a dry storage area.
recomments all these factors are used with regard to the
use of the surface mount products we manufacture.