Patent ID: 9245798
Filing Date: 2016-01-26
CPC Classification: H01L

Claim Text:
1. A method for at least partially filling a feature on a workpiece, the method comprising: (a) obtaining a workpiece including a feature having a high aspect ratio in the range of about 10 to about 80; (b) electrochemically depositing a first conformal conductive layer in the feature; (c) thermally treating the workpiece to reflow the first conformal conductive layer into the feature in a temperature range of about 250° C. to about 350° C. so as to at least partially fill the feature with a reflowed conductive layer; (d) electrochemically depositing a second conformal conductive layer after the reflowed first conformal conductive layer; and (e) thermally treating the workpiece to reflow the second conformal conductive layer into the feature.