Etching Micro Bump

Etching Micro Bump

Micro bumps are useful as some interconnections on circuit. Conventional plating bump is popular to make bumps, but it is very difficult to keep the height of them uniform at such bumps as with fine pitch, high density and/or high aspect ratio structure.

FLEXCEED applies multiple step etching on thick copper to etch out the shape of micro bumps, which makes very uniform height of bumps possible.

  • Appearance of Etching Micro Bumps
    (SEM Image x 1000)
    Appearance of Etching Micro Bumps (SEM Image x 1000)
  • Cross Section of Etching Micro Bumps
    Cross Section of Etching Micro Bumps