Underfill底部填充
Underfill is an adhesive encapsulant that flows beneath a flip-chip die or package to fill the gap between the chip and substrate, reinforcing solder joints against mechanical and thermal stress. In translation and localization, the term appears in packaging assembly instructions, material datasheets, reliability reports, rework procedures, and failure analysis documents that describe dispensing, curing, fillet formation, and void control.
Updated
Angel Translation editorial reference · Confirm the rendering against your source and approved project terminology.
Check source meaning → confirm the preferred term → record approved variants and references.
Where this term appears
Translators see underfill in flip-chip assembly documents, surface-mount technology guidelines, and reliability test specifications. It appears in work instructions for dispensing patterns, curing profiles, and inspection criteria. The term also occurs in rework manuals where underfill removal and reapplication steps must be described precisely to avoid damaging adjacent components.
Translation checks
A frequent mistake is translating underfill simply as '填充胶' without conveying that it flows under the die. This can blur the distinction from other adhesives or molding compounds. In rework and reliability content, imprecise wording may cause operators to apply the wrong material or overlook capillary underfill requirements, leading to solder joint cracks and field failures.
From reading to a project
Track what underfill names in each file
Illustrative file reference · invented DEMO documents
- File and revision
- DEMO-FC-02 · Package material list · Rev A
- Named material field
- Underfill · material name kept separate from die-attach adhesive
- Diagram references
- DEMO-SEC-04 · under-die region / package outline callouts
- Illustrative Chinese reference
- 封装材料表 · DEMO-FC-02 · A版
Review status: questions to confirm
Distinguish underfill from die attach
If both terms occur in one file set, retain the source distinction between material associated with die attachment and material identified as filling beneath a flip-chip die or package. Do not replace one with the other because both are adhesive materials.
Distinguish underfill from molding compound
Use nearby cross-sections, package labels and material tables to establish whether the source refers to a material beneath the die or to a separate encapsulation/molding region. Do not use generic “encapsulant” as a blanket substitute when the source names underfill.
Keep geometry labels tied to their source callouts
Translate “under-die,” “gap,” “fillet” and “void” as separate labels when present; match each to the same figure or inspection field. Do not convert a label into a process instruction or infer an acceptance criterion.
Related published experience
Torex SemiconductorJapanese → Chinese
Japanese-to-Chinese documentation for a listed Japanese semiconductor manufacturer.
Related Japanese-to-Chinese semiconductor documentation for Torex. The invented register illustrates file preparation; the public case does not identify this particular process or document set.
Identify the source files and revisions, under-die and package labels, approved material names, reviewer and translated file format.
Keep the term aligned across your files
Technical terms need checking against the source, approved product terminology and related specifications. Keep units, parameter conditions and document versions aligned across the file set.
Provide approved terms and previous translations with the source files. Agree how variants, ambiguous wording and revisions will be reviewed. Terminology maintenance and any termbase handback are confirmed in the project scope. See the 8-step AI + expert workflow.
Working on semiconductor documentation?
Include the source and target languages, file types, intended use, deadline and any approved termbase. Agree handling before sending sensitive files. Acknowledged in 4 hours, quoted in 24.
Prepare a Chinese semiconductor-file inquiry →Semiconductor solutions →File handling →A glossary entry is not an official standard or evidence of regulatory acceptance. Confirm current requirements for your project separately.