Electronics Forum: qfn problems (Page 1 of 13)

Reflow soldering problems and traces under component

Electronics Forum | Mon Jul 18 12:24:53 EDT 2016 | oleksz

Some people involved in PCB assembly process claim that SMD components reflow soldering problems are often caused by traces running under a component. According to this claim, trace (or any copper) covered by solder mask and placed under SMD componen

Reflow soldering problems and traces under component

Electronics Forum | Mon Jul 18 12:25:30 EDT 2016 | oleksz

Some people involved in PCB assembly process claim that SMD components reflow soldering problems are often caused by traces running under a component. According to this claim, trace (or any copper) covered by solder mask and placed under SMD componen

Gold Flash with QFN28 problem

Electronics Forum | Dan |

Thu Mar 30 08:58:20 EST 2006

QFN Recognotion Problem

Electronics Forum | Fri Mar 23 05:49:53 EDT 2007 | davef

Can the P&P machine 'learn' the QFN package that's giving you fits?

QFN Recognotion Problem

Electronics Forum | Fri Mar 23 03:56:20 EDT 2007 | Guest

How about recognizing it as square package only(like a big capacitor?

QFN Recognotion Problem

Electronics Forum | Fri Mar 23 07:40:41 EDT 2007 | namruht

I will attempt the square package this morning to see if that helps.

QFN Recognotion Problem

Electronics Forum | Fri Mar 23 07:41:44 EDT 2007 | namruht

Thanks for the help if any other ideas come up please let me know.

QFN Recognotion Problem

Electronics Forum | Fri Mar 23 09:42:50 EDT 2007 | aj

we place them as a square - no issues at all.

QFN welding problem by reflux oven 10 zones

Electronics Forum | Tue Feb 11 15:17:49 EST 2020 | emeto

Your profile should be close to this.

QFN welding problem by reflux oven 10 zones

Electronics Forum | Tue Feb 11 09:26:57 EST 2020 | astarotf

Hi everyone I have problems welding QFN components in a 10-zone reflux oven, we cannot make a welding fillet that covers the entire QFN pin. Currently we use paste T4 - 63Sn / 37Pb. I enclose the curve of the oven profile. Any help or support on this

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