How to Solder QFN MLF chips Using Hot Air without Solder Paste and Stencils

SMD Soldering Practice Kit: http://store.curiousinventor.com/smd-... This video demonstrates how to solder .5mm pitch QFN chips using only hot air and a soldering iron, without solder paste or a stencil. It also discusses hot air temperature and air settings, and flux type.

• Category

  Science & Technology

[Theo Kallioras]

Amazing video... However you soldered this QFN with no other tiny tiny components nearby. How can someone use the hot air method on logic boards with many components one next to each other, without damaging nearby components?

[CuriousInventor]

You'd need to remove surrounding components first (or put them back later!), or cover them with kapton tape. You can also use kapton tape to prevent nearby plastic parts from melting. Surface tension does a remarkable job at keep small neighboring components from blowing away.

[praxeological]

Why is the display on your meter obscured at 5:35? And thanks for the great vid!

[CuriousInventor]

The meter wasn't measuring temperatures on the chip, so the numbers would have been misleading.

[cloudsifter11]

Like if you sold a girl some lemonade. You would say "I sold 'er some lemonade. Thanks!.

[akash malhotra]

What small pre heater is that?

[Tim Ramich]

It's a silent L in the US because it just sounds stupid if you try to say the L. Keeping the L works with a British accent because it's going to be pronounced like soul-durr. Now with an American accent try saying saal-durr.

[jrcampen]

From Wikipedia: The word solder comes from the Middle English word soudur, via Old French solduree and soulder, from the Latin solidare, meaning "to make solid".

The only place in the world its called soder is in America.

[dalriada842]

There's no such thing as an official pronunciation. Americans pronounce it with a silent "l"; most other native English speakers pronounce the "l". This is just a part of the natural variation in speech. The etymological root of the word is irrelevant. Not only is Modern English highly irregular with regards to spelling, but you ignored the Latin and Old French predecessors, that had an "l"!

[techkitsune]

Why do we call it 'soder?"

Because that's the OFFICIAL pronunciation. The L is MEANT to be silent.

Starting back in 1325–75; (noun) Middle English soudour

Never was an L in it to begin with.

[Marcin Kufera]

Dobry filmik gratulacje!!!

[macmunka]

Thank you!

[jrcampen]

Great tutorials, I love it, thanks for your time to make these. My only minor gripe is why do you call it "soder"? There is an L in solder and that's how it is pronounced. Or is this just another stupid miss translation by American speakers? Because everyone else in the rest of the world calls it Solder. as in actually pronouncing the L. Give it a try and see how you go.

[Telegu Alin]

Verry nice! More tutorials! Thanks!

[1000und1led]

nice tutorial.