Copper Pillar铜柱凸块
A copper pillar is a columnar copper bump formed on a die bond pad for flip-chip interconnection, often capped with solder and used where fine pitch or high current density is required. It appears in packaging design rules, assembly process specifications, and bumping documentation that define pillar height, diameter, and under-bump metallurgy; the term is common in advanced flip-chip package documentation.
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Where this term appears
In localization, copper pillar appears in packaging design rules, bumping process specifications, flip-chip assembly instructions, and substrate or package drawings. It also appears in reliability documents and failure-analysis reports where interconnect integrity, solder cap volume, and underfill compatibility are discussed. Translators often encounter it in supplier datasheets for OSATs and advanced packaging equipment.
Translation checks
A common error is translating copper pillar as 'copper column' or '铜柱' without the bump context, making it sound like a structural support rather than an interconnect. Another is confusing it with a solder bump or copper post; because its solder cap and under-bump metallurgy affect assembly yield, imprecise terminology can hide key design rules.
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