Laser subassembly metallization for heat assisted magnetic recording

摘要

A heat assisted magnetic recording (HAMR) assembly includes a slider, a laser diode and solder connections between the laser diode and the slider. The solder connections mechanically and electrically attach the laser diode to the slider. Each solder connection has a total volume per unit area (i.e., height) of less than or equal to about 15 μm. The solder connections have a first intermetallic zone adjacent to the laser diode, a second intermetallic zone adjacent to the slider, and a eutectic zone of eutectic material between the first and second intermetallic zones. The eutectic zone occupies greater than or equal to about 35% of the total volume per unit area of the solder connection.

主权项

1. A heat assisted magnetic recording (HAMR) assembly, comprising;
a slider comprising read and write transducers; a laser diode; solder connections between the laser diode and the slider that mechanically and electrically attach the laser diode to the slider, each solder connection having a surface area at the laser diode of less than about 300 μm2, a surface area at the slider of less than about 300 μm2, a total volume per unit area of less than or equal to 8 μm, and having a first intermetallic zone adjacent to the laser diode, a second intermetallic zone adjacent to the slider, and a eutectic zone of eutectic material between the first and second intermetallic zones, the eutectic zone occupying greater than or equal to about 35% of the total volume per unit area of the solder connection.