Is the bottom side (PCB side) of a 2.5" HDD at risk of being shorted out?

Upgrader3

Honorable
Jun 29, 2012
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Is the bottom side (PCB side) of a 2.5" HDD at risk of being shorted out?

The drive in question a Hitachi 2.5" 750GB 7200RPM 16MB-Cache.
P/N: H2T7501672S (I can post a photo if necessary)

If I have the bare drive installed in a horizontal orientation (in a desktop tower case) with the PCB-side facing upward [I am aware that this would be considered "upside down" by conventional standards]...

And if the drive is hooked up and running...

And if I happened to drop a flat electrically-conductive metal object on the exposed PCB surface (say a penny, a metal washer, a hardware fastener, etc.)...

When the object contacts the PCB surface, is there a risk of the drive malfunctioning by shorting out any exposed electrical contacts?

Or is this exposed surface free of exposed electrical contact points? . Or finished with some kind of clear electrical insulation layer?