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100+ Breakthrough Repair/Rework Guides Illustrated and Online
Free online guidebook, packed with detailed illustrations, will be helpful to anyone who needs to repair or rework circuit board assemblies to IPC standards.
Circuit Technology Center
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SEHO

Wave Soldering Seminar - October 7
The one-day wave soldering seminar trains participants in process parameters, defect correction, machine maintenance & hands-on PowerWave system use to optimize solder quality and reduce production costs.
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Ask the Experts Index

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876 expert questions.

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Oct 3, 2025
Reflow Causing Warp
We have a 20 layer PWB that is not balanced, 8 of 10 - 1oz cu layers in ...
J.W.

Oct 2, 2025
Conformal Coating Recommendation
We are developing an outdoor LED module. This module will needconformal coating to prevent humidity issues and protect ...
Y.F.

Oct 1, 2025
Circuit Board Bow and Twist
Board flexing has recently started to occur on one of our circuit board assemblies. This assembly has a ...
A.M.

Sep 30, 2025
Burned Chip Repair
I have a circuit board with a burned chip. The manufacturer wants to charge an arm and a ...
D.D.

Sep 29, 2025
Confused About IPC-A-610 Class 2 vs. Class 3
My company is confused about IPC-A-610 Class 2 and Class 3. Some believe that Class 3 is for ...
T.G.

Sep 26, 2025
Copper Dissolution Rate
Does anyone have data on the rate of copper dissolution in solder? Have any studies been done on ...
B.W.

Sep 24, 2025
What is the IPC Definition of Uncommonly Harsh?
IPC-A-610 and other documents define class 3 to include products where "the end use environment may be uncommonly ...
S.M.

Sep 23, 2025
Suggested Limit for PCBA Heat Cycles
What is the suggested limit for the total number heating cycles that can be done on one PCB ...
P.V.

Sep 22, 2025
PCBA Inspection Process Causing Damage
We inspect PCBAs on a relatively hard ESD mat surface. QA claims that during inspection, moving of the ...
T.S.

Sep 19, 2025
Is Component Lead Damage Reparable?
Our lead forming process left gashes in the component leads. Some more than 10% of the lead thickness, ...
C.P.

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kyzen

The "Fried Egg" Effect in Soldering
Burnt-on flux residue that is visible on the solder mask of PCBs after improper reflow settings produces significant challenges to the reliability of finished boards.
KYZEN
Summit-Interconnect