underfill

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underfill [′ən·dər‚fil]

(metallurgy)

A depression on the face of the weld which falls below the surface of the adjacent base metal.

underfill

A depression, on the face of a weld, which extends below the surface of the adjacent base metal.

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No references found			Electromigration life was longer when underfill was used, and significant solder joint deformation toward the cathode occurred when underfill was not. "Studies on solder Electromigration in lead-free flip chip joint ... by Circuits Assembly 123-38A/B-187 is a thermally conductive underfill epoxy that strengthens the chip package and protects it from moisture. Flip chip adhesive and epoxy products by JCT CoatingsTech No-flow underfill is a solution for enhancing the drop test performance of CSP solder joints, and has been adopted for portable devices. The relationship of components, alloys and fluxes, Part 2: in this ... by Lee, NingCheng / Printed Circuit Design & Manufacture			undercoating underconsolidated soil deposit underconsolidation undercooling undercooling effect undercourse undercroft undercured undercurrent undercurrent relay undercut undercut door undercut tenon undercutting underdamping underdeck tonnage underdeveloped underdevelopment underdraft underdrain underdrawing underdrive press underearth underfeed stoker underfelt underfill underfit stream underfloor underfloor conduit system underfloor heating underfloor raceway underflow underflow conduit undergird underglaze decoration undergraduate underground Underground Borer Underground Brine underground burst underground coal mining underground construction underground distribution system Underground Fire underground gasification underground geology underground glory-hole method underground ice Underground Leaching underground milling Underground Mine			underestimates underestimates underestimating underestimating underestimation underestimation underestimations underestimations underevaluation underexpose underexposed underexposes underexposing underexposure Underfaction Underfaculty Underfarmer Underfashion Club underfed underfeed underfeed underfeed stoker underfeeding underfeeding underfeeds Underfellow underfelt underfelt underfelts underfelts underfill Underfilling underfilling theory underfilling theory underfilling theory underfilling theory underfinanced Underfit Underfit river Underfit stream underfloor underfloor Underfloor central heating Underfloor central heating underfloor conduit system Underfloor heating Underfloor heating Underfloor Heating Manufacturers Association underfloor raceway underfloor wheel lathe underflow underflow underflow underflow conduit underflows underflows underflue Underfollow Underfong underfoot underframe

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