Process recommendations

MP34DTW01

10/16

DocID023177 Rev 2

7

Process recommendations

To ensure a consistent manufacturing process it is strongly advised to comply with following

recommendations:

–

The recommended pick-up area for the MP34DTW01 package must be defined

using the worst case (ie. no device alignment during picking process). This area

has been defined considering all the tolerances of the components involved (reel,

package, sound inlet). Picker tolerance shall be considered as well.

–

To prevent damage to the MEMS membrane or incorrect pick-up and placement,

do not pick up the component on the inlet area

–

For the package outline please refer to Figure 5. Nozzle shape, size, and

placement accuracy are the other key factors to consider when deciding on the

coordinates for the picking.

–

Device alignment before picking is highly recommended.

–

A vacuum force greater than 7 psi must be avoided

–

1 kPa = 0.145 psi (lb/in2) = 0.0102 kgf/cm² = 0.0098 atm

–

All the recommended dimensions (device safe pick area) do not include the pick

and place equipment tolerances

Figure 6. Recommended picking area

To have a safe pick-up "by design", ST it is strongly advised to an ad hoc nozzle.

Following picker ensures that the holes for the vacuum and the air blow are ALWAYS away

from the porthole of the device (4 vacuum ports located at the corner of the device).

The suggested nozzle has also a recess, in the form of a cross, that guarantees the porthole

to be always left at atmospheric pressure. By using the suggested nozzle the membrane will

not suffer any sudden air disturbances during the picking or placing of the devices in the

tape and reel.

Obsolete

Product(s)

- Obsolete

Product(s)