Operation manual for Narrow-pitch connectors F4S
Panasonic Corporation
industrial.panasonic.com/ac/e/
©
Panasonic Corporation 2017
ACCTF5E-5 201704
- 11 -
3) Reinforcing plate design
We recommend the use of a reinforcing plate with appropriate thickness and
rigidity to prevent solder peeling and pattern peeling when unmating the
connector, and to guard against board warpage during the reflow process.
(1)
We recommend the use of a glass-reinforced epoxy resin sheet, since it is
rigid.
(2)
When a polyimide resin plate is used to avoid the generation of fabric
particles:
- Select a thick sheet whenever possible.
(
In general, 0.2 mm or thicker sheet is used.
)
-
High-rigidity epoxy adhesive is recommended for attaching the reinforcing
plate to a flexible board
.
- As a measure to ensure rigidity, attach two thin reinforcing plates using epoxy
adhesive. This achieves greater rigidity than a single reinforcing plate of the
same thickness.
(3)
Warpage of the reinforcing plate during the reflow process or poor soldering
may occur depending on the direction the reinforcing plate on material was
cut. Accordingly, make sure to indicate the direction of the material.
(
Rolled sheets generate warpage depending on material direction, so
therefore, make sure to warpage reduction into consideration.
)
(4)
For using an ultra-thin reinforcing plate for slimming a product, one way is
to use metals such as stainless steel for the reinforcing plate.
(5)
To avoid generating stress on the soldering portion of the connector when
removing the connector or bending an FPC board, design
a reinforcing plate
about 0.5 to 1.0 mm longer from the foot pattern tip
.
(6)
Foot pattern design
The following measure is effective for improving
the strengthening effect when the reinforcing
plate is thin.
-
Make the foot pattern length longer than the
coverlay opening.
In general, it is designed to be about 0.3 mm..
However, when the reinforcing plate is thin,
it is recommended to secure at least
twice the normal length
.
If the connector will
be unmated, set
this to 0.5-1.0 mm.
0.5-1.0 mm
When a thin and soft reinforcing plate is used, the reinforcing
plate may warp if this dimension is too large, which results in
reducing the reinforcing effect.
Reinforcing plate
