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US6166334A Plating process for fine pitch die in wafer form 失效
晶圆形细微间距模具的电镀工艺

Plating process for fine pitch die in wafer form
Abstract:
Apertures in a tape formed on a substrate allow straight plating of solder bumps to heights above 4 mils. The solder bumps are combined with a lower density material to form an hourglass-shaped structure which allows interconnections to bonding pads of electronic components with pitches less than 9 mils.
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