A simulated three dimensional thin film head field was utilized in the write process and a giant-magnetoresistive (GMR) head was used in the read process.

在写入过程中采用了模拟的三维薄膜磁头，在读出过程中用的是巨磁阻(GMR)磁头。

youdao

Obviously an eyelid-like shutter mechanism would be too large and complicated for something as small as a print head, so an electrical field is applied instead to keep the film spread thin.

ENGADGET: Alt-week 7.28.12: social mathematics, Pluto's moons and humans-on-a-chip