Room-temperature direct bonding of electroplated Au patterns flattened by a thermal imprint process
Rough surfaces of electroplated Au patterns were flattened by thermal imprinting. Almost the entire area of a 100-?m-wide pattern was flattened. Large bonding strength was obtained by using a flattening process. Narrow multi-wall line patterns were designed for the bonding strength and hermeticity. Bonding strength was further improved by flattening and a multi-wall narrow pattern.
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