gLike
Improved Z-Drive
The Z-Drive is a mechanical assembly that functions to move wafers
on a chuck top (in the Z-axis) towards the pogo pins of Automatic Test
Equipments (ATEs).
The current PZ-9 design had several reliability issues due to poor design and
lack of considerations in tolerancing stackups. Additional factors including
manufacturing variability and environmental conditions further complicate
the problem and attributes to multiple die damages on customer wafers.
I was tasked to redesign the PZ-9 Z-Drive to rectify the design errors and
provide a pragmatic solution that is both manufacture-able and reliable.
