摘要 |
A solder is deposited on the backside of a wafer. The wafer can be pre-deposited with a barrier layer such as a titanium base and other materials. Deposition is carried out by electroplating, electroless plating, chemical vapor deposition, and physical vapor deposition. The solder-deposited die is bonded with a heat spreader that did not require a pre-deposited solder.
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