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QFP

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QFP
(Quad FlatPack) A square, surface mount chip package that has leads on all four sides and comes in several varieties. PQFP (Plastic QFP) may refer to all of the following QFP types. All quad flatpacks use gull-wing leads, except for the CQFP, which stick straight out. See flatpack, gull-wing lead and chip package.

    Plastic
    MQFP   Metric QFP (most popular)
    FQFP   Fine pitch QFP
    BQFP   Bumpered QFP
    LQFP   Low-profile QFP
    TQFP   Thin-profile QFP
    SQFP   Shrink QFP (same as MQFP)

    Ceramic
    CQFP   Ceramic QFP


Quad Flatpack
QFPs come in a variety of sizes and types. Notice the gull-wing leads on both of these chips.
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In this instance, a Pb-free QFP presented some joints where solder did not wet the side and toe of the component leads (Figure 1).
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Model QFP (Quality, Functionality, Processability) was developed according to the recommendations of a dozen big producers of flexible packaging.
New Modular Extrusion Coater Slashes Lead Times by Plastics Technology
MIR further suggested that the QFP Plug could also be significantly interactive with the above shear zone to possibly produce systems of fracturing and veining in the surrounding metabasalts in either a tensional brittle-ductile system or a brittle fault deflection system.
Unitronix Corporation's Subsidiary, Aur Lake Exploration Inc., ... by Business Wire
 
 
 
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