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Qaagi - Book of Why

Causes

Effects

solder flux that vaporizes during the soldering process and can not escape from the liquid solder layer(passive) are generally caused bySolder voids

when gas or flux is entrapped during soldering , often as a result of water contamination of solder paste(passive) are createdSolder voids

by controlling the time - temperature profile of the oven(passive) may be preventedSolder voids

Use either plated - shut or plugged and capped vias for all the thermal vias on both sides of the boardto preventsolder voids

entrapped gas or flux(passive) are caused bySolder voids

any flux pockets caught inside the jointswould causesolder voids

capped on both sides of the boardto preventsolder voids

Which Prevent Heat Dissipation , Causes Hot Spots , Die Solder Reflow , and Ultimate Diode FAILURE(passive) Are CreatedSolder Voids

the phone ... the keysetsolder microrupteur

having a hotter profile(passive) are caused bySolder Void

the initiation or propagation of damage in the STIM layer or the location of hot spot on the heat generating chipcan ... influencethe initiation or propagation of damage in the STIM layer or the location of hot spot on the heat generating chip

Cell damage from thermal runaway(passive) may be caused byCell damage from thermal runaway

a “ thermal bottleneck ” or an interruption in the normal thermal conductivity of the resistive film , leading to potentially catastrophic hot spots at high power levelscan createa “ thermal bottleneck ” or an interruption in the normal thermal conductivity of the resistive film , leading to potentially catastrophic hot spots at high power levels

deterioration in the performance of semiconductor device and shortening in lifetimemay leaddeterioration in the performance of semiconductor device and shortening in lifetime

to leaksleadto leaks

failure in electric connection between the through hole and the conductive pinmay causefailure in electric connection between the through hole and the conductive pin

free Sn99.3 / Cu0.7sizeleadfree Sn99.3 / Cu0.7size

in poor connectivity with the lead pad 103may resultin poor connectivity with the lead pad 103

an opening in the conductive adhesive 212 that extends between two instances of the isolation region 214 ( e.g. , the two instances of the isolation regions 74 illustrated in FIGcreatesan opening in the conductive adhesive 212 that extends between two instances of the isolation region 214 ( e.g. , the two instances of the isolation regions 74 illustrated in FIG

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