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C&E

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Qaagi - Book of Why

Causes

Effects

Pressure on the broochcan causesolder to break

solder with lead soldering lead battery terminalsleadsolder wire

solder manufacturers ... solder wire drawing machine drawing the line color to darkdo leadsolder wire

For Iron A(passive) is composedSolder - Hard

solder manufacturers ... such a problemdo leadsolder wire

excessive gold in a solder jointcan causesolder embrittlement

older manufacturersdo leadsolder wire

with Flux Cored and Residue(passive) is designedSolder wire

eithercausessolder embrittlement

to stressmay leadsolder snap

of solder alloys(passive) are composedSolder preforms

usually(passive) are ... causedSolder peaks

Each of uslead500,000 solder

by a few reasons such as ; not enough flux(passive) are ... caused bySolder peaks

by a few reasons such as ; not enough flux(passive) are ... causedSolder peaks

heatingto causesolder reflow

by a few reasons such as(passive) are ... caused bySolder peaks

the optical elements ... sufficientto causesolder reflow

solder pastemay causesolder balling

The separated solder paste particlescan potentially causesolder bridging

to seal specific packages(passive) are designedSolder preforms

Elevated temperatures and excessive time at those temperatures during the warm - up and preheating stages can result in inadequate fluxing activity or insufficient protection of solder spheres in the pastecausingsolder balling

warping(passive) caused bysolder bridging

also(passive) may ... be causedSolder balling

by the exposure of the base material(passive) caused bysolder wettability

the stencil printing process(passive) was ... caused bysolder splatter

by conventional processes(passive) caused bysolder wettability

Too much solder pastewill causesolder

Rapid heating of soldercausedsolder

to get sufficient heat into the leadto causesolder

of tin and lead alloys(passive) may be composedSolder

by molten solder surface tension(passive) caused bysolder

of tin and lead(passive) is composedsolder

of lead or tin(passive) is typically composedSolder

Solder Re - Flow Excessive heathas causedsolder

Sn / Pb ) or lead - free(passive) can be leadedSolder

by a reduction in temperature(passive) caused bysolder

for electronics use(passive) is designedsolder

boardcausingsolder to

of mostly tin and/or lead(passive) is composedSolder

to bridging and cold solder joints which can be tough to findleadsto bridging and cold solder joints which can be tough to find

to hold up against production with using tin / lead solder anddesignedto hold up against production with using tin / lead solder and

the pins to not " home and lock ... all the way incan causethe pins to not " home and lock ... all the way in

bridging or imbalanced solder that might cause a component not to mountmight causebridging or imbalanced solder that might cause a component not to mount

to terminal cup , observing polarityleadsto terminal cup , observing polarity

to be soft soldereddesignedto be soft soldered

to them before soldering them to the boardleadsto them before soldering them to the board

in a delamination at interfacesresultsin a delamination at interfaces

device resetscausingdevice resets

ShortCausesShort

in attachment between the chip and the substrateresultsin attachment between the chip and the substrate

This Pin(passive) was discovered byThis Pin

a bridge to form between leadscausesa bridge to form between leads

of tin and leadcomposedof tin and lead

of tin and leadcomposedof tin and lead

different types of defectscausingdifferent types of defects

failurecausingfailure

of Sncomposedof Sn

of Sn and Pbcomposedof Sn and Pb

of 63%Tin and 37%Lead meltscomposedof 63%Tin and 37%Lead melts

of the lasersleadsof the lasers

for electronic usedesignedfor electronic use

to enhance reliability and heat transfer through the reduction of voiding underdesignedto enhance reliability and heat transfer through the reduction of voiding under

to enhance reliability and heat transfer through the reductiondesignedto enhance reliability and heat transfer through the reduction

to meet the voiding requirements of today 's high reliability applicationsare designedto meet the voiding requirements of today 's high reliability applications

to capacitance issuescan also leadto capacitance issues

bad joint quality due to insufficient soldercausesbad joint quality due to insufficient solder

to dry solder jointsleadingto dry solder joints

to the pads on the back of the board with the soldering ironleadsto the pads on the back of the board with the soldering iron

connection failures of the solder or chip displacementwould ... causeconnection failures of the solder or chip displacement

free solderleadfree solder

of gold / lead / tin alloy , indium , or indium / tin alloy as the solder materialcomposedof gold / lead / tin alloy , indium , or indium / tin alloy as the solder material

to the pads with the soldering ironleadsto the pads with the soldering iron

without stand - offleadswithout stand - off

the wire to break just past where the solder endswill causethe wire to break just past where the solder ends

on the board / PCBleadson the board / PCB

bad joint qualitycausesbad joint quality

damage at the circuit levelcausingdamage at the circuit level

of tin and leadcomposedof tin and lead

of lead and tincomposedof lead and tin

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