3D Read/write heads

"Common Sense" (not all that common and not always sensible) says to me 'Not practically or cost effectivly with current tech'.

If you were able, like IBM, to manipulate things at the atomic/molecular level then 'maybe'.

3D Read/write heads

The read/write head on a hard disc drive is a very intricate part. To ensure that everything will function flawlessly in the future, it is crucial to verify various surface parameters even during the development stage. A read/write head's complete surface can be measured using surface measurement systems from Polytec, which not only saves time but also makes it possible to accurately and quickly compare component heights. Nothing prevents flatness categorization, either. To measure rough metrics, you can either use a microscope system or a large-area measuring system, depending on your needs.